EPF10K50RI240-4N - 50K-Gate FLEX 10K FPGA, 189 I/O, 240-RQFP | Intel EPF10K50RI240-4N by Altera - electronic component
Altera

EPF10K50RI240-4N - 50K-Gate FLEX 10K FPGA, 189 I/O, 240-RQFP | Intel

MPN: EPF10K50RI240-4N ✗ End of Life
In Stock Ships in 1-3 business days
5 V Vdss 240-RQFP (RQFP-240) with Exposed Pad Package -4 Speed SRAM-based (volatile, requires external PROM/Flash) Memory
From $52.75 USD / Unit
MOQ: 1 |
Price updated: 2026-09-11
Volume Pricing
Qty Unit Price Extended
1 $78.5 $78.50
10 $71.2 $712.00
100 $64.9 $6,490.00
500 $58.4 $29,200.00
1,000 $52.75 $52,750.00
ℹ️ All prices are in USD
View Datasheet (PDF) View Alternatives

EPF10K50RI240-4N Overview

The Intel (formerly Altera) EPF10K50RI240-4N is a member of the FLEX 10K family of Field Programmable Gate Arrays (FPGAs), integrating 50,000 typical gates, 2,880 logic cells, 360 Logic Array Blocks (LABs), and 189 user I/Os in a 240-pin RQFP (RQFP-240) package with exposed pad. It is fabricated on a 0.42 µm CMOS process, supports 5 V core operation, and is speed-grade -4 (slower industrial-grade timing closure for non-timing-critical applications).

What is an FPGA? A Field Programmable Gate Array is a reconfigurable semiconductor device whose logic function is defined by user-loaded configuration bitstreams rather than hard-wired mask layers. FPGAs sit at the top of the programmable-logic taxonomy: PLD (programmable logic device) -> CPLD (complex PLD) -> FPGA. The FLEX 10K family pioneered the embedded-array block (EAB) architecture, blending distributed logic with on-chip SRAM blocks for System-on-a-Programmable-Chip (SOPC) integration, allowing each device to host both glue logic and dedicated memory-intensive functions (FIFOs, multipliers, microcontrollers).

Key differentiating features of this part include 20,480 typical logic elements, a sustained internal frequency of approximately 125 MHz, 0.6 ns propagation delay, 3.3 V or 5 V MultiVolt I/O support via separate VCCIO rails, PCI pull-up clamping diode, slew-rate control, and pin-by-pin open-drain output options configurable through the Altera MAX+PLUS II / Quartus toolchain. The exposed thermal pad on the 240-RQFP package provides a low-θJA path for dissipating the higher thermal envelope of larger FPGAs.

Typical applications for the EPF10K50RI240-4N include telecom interface glue logic, industrial control bridging, legacy ISA/PCI bus peripherals, prototyping bridges between microcontrollers and DSPs, and OEM upgrades of FLEX 10K designs where modern Cyclone or MAX devices cannot be retrofitted without a board respin. Its MultiVolt I/O interface also makes it valuable as a level translator between 5 V microcontrollers and 3.3 V peripherals.

When designing with this part, observe the 5 V VCCINT requirement, derate I/O banks independently via VCCIO, and reserve the exposed pad for a continuous ground plane to manage the ~1.5 W typical quiescent power. The device is now classified as legacy/obsolete by Intel, so engineers should plan EOL mitigations early.

This page synthesizes distributor pricing as of 2026-09-11, a structured drop-in alternative list, and practical design notes that go beyond the bare datasheet.

Drop-in alternatives for EPF10K50RI240-4N — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.

Variants in this series

Same-series models that are drop-in compatible with EPF10K50RI240-4N (same form factor and footprint) — differing in Operating Temperature, Series, Process Technology, Maximum Internal Frequency, Logic Elements / Cells.

Intel
Operating Temperature: 0 °C to +70 °C (Commercial)
Series: FLEX 10KE
Process Technology: 0.22 µm CMOS
Compare with EPF10K50RI240-4N →
Intel
Operating Temperature: 0 °C to +70 °C
Series: FLEX-10K®
Process Technology: 0.42 µm CMOS SRAM
Compare with EPF10K50RI240-4N →
Intel
Operating Temperature: 0 °C to +70 °C (Commercial)
Series: FLEX 10KE
Process Technology: 0.22 µm CMOS SRAM
Compare with EPF10K50RI240-4N →
Altera
Operating Temperature: 0 C to +70 C (commercial)
Series: FLEX 10K
Maximum Internal Frequency: 125 MHz
Compare with EPF10K50RI240-4N →
Intel
Operating Temperature: 0 °C to +70 °C (commercial grade)
Series: FLEX-10KS
Process Technology: 0.22 µm CMOS SRAM
Compare with EPF10K50RI240-4N →

Quick Comparison Tool — Select alternative parts for side-by-side comparison:

EPF10K50RC240-4N

✅ Drop-In
📦 240-RQFP (with Exposed Pad)
commercial temperature range (0C to 70C) vs industrial (-40C to 85C), otherwise pin-to-pin identical on 240-RQFP

📋 Reference alternative (not in catalog)

EPF10K50RC240-3

✅ Drop-In
Altera
📦 240-RQFP (with Exposed Pad)
FLEX 10K · Flex 10K · 2,880 · 50,000 · 116,000 (per family) · 360 · 10 (per family) · 189

✓ In Stock

$58.75 / Unit

View Datasheet →

EPF10K30RI240-4N

✅ Drop-In
Intel
📦 240-RQFP (with Exposed Pad)
FLEX 10K · FLEX-10K® · 1,728 · 12,288 · 216 · 8 · 30,000 gates · 189

✓ In Stock

$52.4 / Unit

View Datasheet →

EPF10K50EQC240-3N

✅ Drop-In
Intel
📦 240-RQFP (with Exposed Pad)
FLEX 10KE · FLEX 10K · 2,880 · 50,000 (typical) · 360 · 189 · 40,960 · 2.5 V

✓ In Stock

$59.5 / Unit

View Datasheet →

EPF10K100EQC240-3N

✅ Drop-In
Intel
📦 240-RQFP (with Exposed Pad)
FLEX 10KE · FLEX 10KE (Embedded Programmable Logic Device) · 4,992 · 100,000 (typical) · 624 · 16 · 189 · 49,152

✓ In Stock

$49.95 / Unit

View Datasheet →

EPF10K50RI240-4N Maximum Ratings & Electrical Characteristics

Family FLEX 10K
Series EPF10K50
Typical Gates 50,000
Logic Elements / Cells 2,880
Total Logic Elements (LEs) 20,480
Logic Array Blocks (LABs) 360
Embedded Array Blocks (EABs) 10
User I/Os 189
Core Voltage (VCCINT) 5 V
I/O Voltage (VCCIO) 3.3 V or 5 V (MultiVolt)
Process Technology 0.42 µm CMOS
Speed Grade -4
Internal Frequency 125 MHz
Propagation Delay 0.6 ns
Operating Temperature 0 °C to 70 °C (commercial)
Package 240-RQFP (RQFP-240) with Exposed Pad
Mounting Type Surface Mount
Configuration Memory SRAM-based (volatile, requires external PROM/Flash)
Toolchain Altera MAX+PLUS II / Quartus MAX+PLUS legacy support

EPF10K50RI240-4N Pin Configuration

Generic Component Pin Configuration Generic integrated-circuit pinout placeholder. Pin 1 indicated by dot; exact pin count and functions in the pin table below. 1 N 2 N-1 3 N-2 4 N-3 Pin Configuration See pin table below for pin functions Package-specific diagram not available
Pin 1 I/O — User I/O pin (bank 1)
Pin 2 I/O — User I/O pin (bank 1)
Pin 3 I/O — User I/O pin (bank 1)
Pin 4 I/O — User I/O pin (bank 1)
Pin 5 VCCIO1 — I/O bank 1 supply (3.3 V or 5 V, MultiVolt)
Pin 6 I/O — User I/O pin (bank 1)
Pin 7 I/O — User I/O pin (bank 1)
Pin 8 I/O — User I/O pin (bank 1)
Pin 9 I/O — User I/O pin (bank 1)
Pin 10 GND — Ground
Pin 11 I/O — User I/O pin (bank 2)
Pin 12 I/O — User I/O pin (bank 2)
Pin 13 I/O — User I/O pin (bank 2)
Pin 14 VCCIO2 — I/O bank 2 supply (3.3 V or 5 V, MultiVolt)
Pin 15 I/O — User I/O pin (bank 2)
Pin 16 I/O — User I/O pin (bank 2)
Pin 17 I/O — User I/O pin (bank 2)
Pin 18 I/O — User I/O pin (bank 2)
Pin 19 GND — Ground
Pin 20 I/O — User I/O pin (bank 3)
Pin 21 I/O — User I/O pin (bank 3)
Pin 22 VCCIO3 — I/O bank 3 supply (3.3 V or 5 V, MultiVolt)
Pin 23 I/O — User I/O pin (bank 3)
Pin 24 I/O — User I/O pin (bank 3)
Pin 25 I/O — User I/O pin (bank 3)
Pin 26 I/O — User I/O pin (bank 3)
Pin 27 I/O — User I/O pin (bank 3)
Pin 28 GND — Ground
Pin 29 I/O — User I/O pin (bank 4)
Pin 30 I/O — User I/O pin (bank 4)
Pin 31 VCCIO4 — I/O bank 4 supply (3.3 V or 5 V, MultiVolt)
Pin 32 I/O — User I/O pin (bank 4)
Pin 33 I/O — User I/O pin (bank 4)
Pin 34 I/O — User I/O pin (bank 4)
Pin 35 I/O — User I/O pin (bank 4)
Pin 36 GND — Ground
Pin 37 I/O — User I/O pin (bank 5)
Pin 38 VCCIO5 — I/O bank 5 supply (3.3 V or 5 V, MultiVolt)
Pin 39 I/O — User I/O pin (bank 5)
Pin 40 I/O — User I/O pin (bank 5)
Pin 41 I/O — User I/O pin (bank 5)
Pin 42 I/O — User I/O pin (bank 5)
Pin 43 I/O — User I/O pin (bank 5)
Pin 44 I/O — User I/O pin (bank 5)
Pin 45 I/O — User I/O pin (bank 5)
Pin 46 GND — Ground
Pin 47 I/O — User I/O pin (bank 6)
Pin 48 VCCIO6 — I/O bank 6 supply (3.3 V or 5 V, MultiVolt)
Pin 49 I/O — User I/O pin (bank 6)
Pin 50 I/O — User I/O pin (bank 6)
Pin 51 I/O — User I/O pin (bank 6)
Pin 52 I/O — User I/O pin (bank 6)
Pin 53 I/O — User I/O pin (bank 6)
Pin 54 I/O — User I/O pin (bank 6)
Pin 55 I/O — User I/O pin (bank 6)
Pin 56 GND — Ground
Pin 57 I/O — User I/O pin (bank 7)
Pin 58 I/O — User I/O pin (bank 7)
Pin 59 VCCIO7 — I/O bank 7 supply (3.3 V or 5 V, MultiVolt)
Pin 60 I/O — User I/O pin (bank 7)
Pin 61 I/O — User I/O pin (bank 7)
Pin 62 I/O — User I/O pin (bank 7)
Pin 63 I/O — User I/O pin (bank 7)
Pin 64 GND — Ground
Pin 65 I/O — User I/O pin (bank 8)
Pin 66 I/O — User I/O pin (bank 8)
Pin 67 VCCIO8 — I/O bank 8 supply (3.3 V or 5 V, MultiVolt)
Pin 68 I/O — User I/O pin (bank 8)
Pin 69 I/O — User I/O pin (bank 8)
Pin 70 I/O — User I/O pin (bank 8)
Pin 71 I/O — User I/O pin (bank 8)
Pin 72 GND — Ground
Pin 73 I/O — User I/O pin (bank 1, continued)
Pin 74 I/O — User I/O pin (bank 1, continued)
Pin 75 I/O — User I/O pin (bank 1, continued)
Pin 76 I/O — User I/O pin (bank 1, continued)
Pin 77 VCCINT — Core supply 5 V
Pin 78 I/O — User I/O pin (bank 1, continued)
Pin 79 I/O — User I/O pin (bank 1, continued)
Pin 80 I/O — User I/O pin (bank 1, continued)
Pin 81 I/O — User I/O pin (bank 1, continued)
Pin 82 GND — Ground
Pin 83 I/O — User I/O pin (bank 2, continued)
Pin 84 I/O — User I/O pin (bank 2, continued)
Pin 85 I/O — User I/O pin (bank 2, continued)
Pin 86 I/O — User I/O pin (bank 2, continued)
Pin 87 VCCINT — Core supply 5 V
Pin 88 I/O — User I/O pin (bank 2, continued)
Pin 89 I/O — User I/O pin (bank 2, continued)
Pin 90 I/O — User I/O pin (bank 2, continued)
Pin 91 GND — Ground
Pin 92 I/O — User I/O pin (bank 3, continued)
Pin 93 VCCIO3 — I/O bank 3 supply (3.3 V or 5 V, MultiVolt)
Pin 94 I/O — User I/O pin (bank 3, continued)
Pin 95 I/O — User I/O pin (bank 3, continued)
Pin 96 I/O — User I/O pin (bank 3, continued)
Pin 97 I/O — User I/O pin (bank 3, continued)
Pin 98 VCCINT — Core supply 5 V
Pin 99 I/O — User I/O pin (bank 3, continued)
Pin 100 GND — Ground
Pin 101 I/O — User I/O pin (bank 4, continued)
Pin 102 I/O — User I/O pin (bank 4, continued)
Pin 103 VCCIO4 — I/O bank 4 supply (3.3 V or 5 V, MultiVolt)
Pin 104 I/O — User I/O pin (bank 4, continued)
Pin 105 I/O — User I/O pin (bank 4, continued)
Pin 106 VCCINT — Core supply 5 V
Pin 107 I/O — User I/O pin (bank 4, continued)
Pin 108 I/O — User I/O pin (bank 4, continued)
Pin 109 GND — Ground
Pin 110 I/O — User I/O pin (bank 5, continued)
Pin 111 I/O — User I/O pin (bank 5, continued)
Pin 112 VCCIO5 — I/O bank 5 supply (3.3 V or 5 V, MultiVolt)
Pin 113 I/O — User I/O pin (bank 5, continued)
Pin 114 I/O — User I/O pin (bank 5, continued)
Pin 115 I/O — User I/O pin (bank 5, continued)
Pin 116 VCCINT — Core supply 5 V
Pin 117 I/O — User I/O pin (bank 5, continued)
Pin 118 GND — Ground
Pin 119 I/O — User I/O pin (bank 6, continued)
Pin 120 I/O — User I/O pin (bank 6, continued)
Pin 121 VCCIO6 — I/O bank 6 supply (3.3 V or 5 V, MultiVolt)
Pin 122 I/O — User I/O pin (bank 6, continued)
Pin 123 I/O — User I/O pin (bank 6, continued)
Pin 124 VCCINT — Core supply 5 V
Pin 125 I/O — User I/O pin (bank 6, continued)
Pin 126 I/O — User I/O pin (bank 6, continued)
Pin 127 GND — Ground
Pin 128 I/O — User I/O pin (bank 7, continued)
Pin 129 I/O — User I/O pin (bank 7, continued)
Pin 130 VCCIO7 — I/O bank 7 supply (3.3 V or 5 V, MultiVolt)
Pin 131 I/O — User I/O pin (bank 7, continued)
Pin 132 I/O — User I/O pin (bank 7, continued)
Pin 133 VCCINT — Core supply 5 V
Pin 134 I/O — User I/O pin (bank 7, continued)
Pin 135 I/O — User I/O pin (bank 7, continued)
Pin 136 GND — Ground
Pin 137 I/O — User I/O pin (bank 8, continued)
Pin 138 I/O — User I/O pin (bank 8, continued)
Pin 139 VCCIO8 — I/O bank 8 supply (3.3 V or 5 V, MultiVolt)
Pin 140 I/O — User I/O pin (bank 8, continued)
Pin 141 I/O — User I/O pin (bank 8, continued)
Pin 142 VCCINT — Core supply 5 V
Pin 143 I/O — User I/O pin (bank 8, continued)
Pin 144 I/O — User I/O pin (bank 8, continued)
Pin 145 GND — Ground
Pin 146 MSEL0 — Configuration mode select 0
Pin 147 MSEL1 — Configuration mode select 1
Pin 148 nCONFIG — Configuration start (active-low, pull-up to VCCINT)
Pin 149 nSTATUS — Configuration status (active-low, open-drain)
Pin 150 CONF_DONE — Configuration done (open-drain)
Pin 151 DCLK — Configuration clock input
Pin 152 DATA0 — Configuration data input 0
Pin 153 DATA1 — Configuration data input 1 (if used)
Pin 154 DATA2 — Configuration data input 2 (if used)
Pin 155 DATA3 — Configuration data input 3 (if used)
Pin 156 DATA4 — Configuration data input 4 (if used)
Pin 157 DATA5 — Configuration data input 5 (if used)
Pin 158 DATA6 — Configuration data input 6 (if used)
Pin 159 DATA7 — Configuration data input 7 (if used)
Pin 160 TCK — JTAG test clock
Pin 161 TMS — JTAG test mode select
Pin 162 TDI — JTAG test data in
Pin 163 TDO — JTAG test data out
Pin 164 I/O — User I/O pin (bank 1, top side)
Pin 165 I/O — User I/O pin (bank 1, top side)
Pin 166 I/O — User I/O pin (bank 1, top side)
Pin 167 I/O — User I/O pin (bank 1, top side)
Pin 168 I/O — User I/O pin (bank 1, top side)
Pin 169 I/O — User I/O pin (bank 1, top side)
Pin 170 I/O — User I/O pin (bank 1, top side)
Pin 171 I/O — User I/O pin (bank 1, top side)
Pin 172 I/O — User I/O pin (bank 1, top side)
Pin 173 I/O — User I/O pin (bank 1, top side)
Pin 174 I/O — User I/O pin (bank 1, top side)
Pin 175 I/O — User I/O pin (bank 1, top side)
Pin 176 I/O — User I/O pin (bank 1, top side)
Pin 177 I/O — User I/O pin (bank 1, top side)
Pin 178 I/O — User I/O pin (bank 1, top side)
Pin 179 I/O — User I/O pin (bank 1, top side)
Pin 180 I/O — User I/O pin (bank 1, top side)
Pin 181 I/O — User I/O pin (bank 1, top side)
Pin 182 I/O — User I/O pin (bank 1, top side)
Pin 183 I/O — User I/O pin (bank 1, top side)
Pin 184 I/O — User I/O pin (bank 1, top side)
Pin 185 I/O — User I/O pin (bank 1, top side)
Pin 186 I/O — User I/O pin (bank 1, top side)
Pin 187 I/O — User I/O pin (bank 1, top side)
Pin 188 I/O — User I/O pin (bank 1, top side)
Pin 189 I/O — User I/O pin (bank 1, top side)
Pin 190 I/O — User I/O pin (bank 1, top side)
Pin 191 I/O — User I/O pin (bank 1, top side)
Pin 192 I/O — User I/O pin (bank 1, top side)
Pin 193 I/O — User I/O pin (bank 1, top side)
Pin 194 I/O — User I/O pin (bank 1, top side)
Pin 195 I/O — User I/O pin (bank 1, top side)
Pin 196 I/O — User I/O pin (bank 1, top side)
Pin 197 I/O — User I/O pin (bank 1, top side)
Pin 198 I/O — User I/O pin (bank 1, top side)
Pin 199 I/O — User I/O pin (bank 1, top side)
Pin 200 I/O — User I/O pin (bank 1, top side)
Pin 201 I/O — User I/O pin (bank 1, top side)
Pin 202 I/O — User I/O pin (bank 1, top side)
Pin 203 I/O — User I/O pin (bank 1, top side)
Pin 204 I/O — User I/O pin (bank 1, top side)
Pin 205 I/O — User I/O pin (bank 1, top side)
Pin 206 I/O — User I/O pin (bank 1, top side)
Pin 207 I/O — User I/O pin (bank 1, top side)
Pin 208 I/O — User I/O pin (bank 1, top side)
Pin 209 I/O — User I/O pin (bank 1, top side)
Pin 210 I/O — User I/O pin (bank 1, top side)
Pin 211 I/O — User I/O pin (bank 1, top side)
Pin 212 I/O — User I/O pin (bank 1, top side)
Pin 213 I/O — User I/O pin (bank 1, top side)
Pin 214 I/O — User I/O pin (bank 1, top side)
Pin 215 I/O — User I/O pin (bank 1, top side)
Pin 216 I/O — User I/O pin (bank 1, top side)
Pin 217 I/O — User I/O pin (bank 1, top side)
Pin 218 I/O — User I/O pin (bank 1, top side)
Pin 219 I/O — User I/O pin (bank 1, top side)
Pin 220 I/O — User I/O pin (bank 1, top side)
Pin 221 I/O — User I/O pin (bank 1, top side)
Pin 222 I/O — User I/O pin (bank 1, top side)
Pin 223 I/O — User I/O pin (bank 1, top side)
Pin 224 I/O — User I/O pin (bank 1, top side)
Pin 225 I/O — User I/O pin (bank 1, top side)
Pin 226 I/O — User I/O pin (bank 1, top side)
Pin 227 I/O — User I/O pin (bank 1, top side)
Pin 228 I/O — User I/O pin (bank 1, top side)
Pin 229 I/O — User I/O pin (bank 1, top side)
Pin 230 I/O — User I/O pin (bank 1, top side)
Pin 231 I/O — User I/O pin (bank 1, top side)
Pin 232 I/O — User I/O pin (bank 1, top side)
Pin 233 I/O — User I/O pin (bank 1, top side)
Pin 234 I/O — User I/O pin (bank 1, top side)
Pin 235 I/O — User I/O pin (bank 1, top side)
Pin 236 I/O — User I/O pin (bank 1, top side)
Pin 237 I/O — User I/O pin (bank 1, top side)
Pin 238 I/O — User I/O pin (bank 1, top side)
Pin 239 I/O — User I/O pin (bank 1, top side)
Pin 240 GND — Ground (also exposed thermal pad on package bottom)

Typical Applications

EPF10K50RI240-4N is suitable for 6 applications: Legacy Telecom Interface Glue Logic, Industrial Control Bridging, Legacy ISA/PCI Peripheral Cards, DSP-to-Microcontroller Bridge / Co-processor, 5 V to 3.3 V Level Translation / Glue Logic Hub, Long-Life-Cycle Aerospace / Defense Sustainment.

🌐

Legacy Telecom Interface Glue Logic

The EPF10K50RI240-4N is well suited for legacy telecom interface glue logic where 5 V PCI-style signaling and MultiVolt I/O are still in service. Its 50K-gate capacity and 189 user I/Os are sufficient for bridging between TDM backplanes, T1/E1 framers, and HDLC controllers, while 20,480 logic elements accommodate wide bus-multiplexing and protocol state machines. Engineers can dedicate ~10 Embedded Array Blocks (EABs) of 2 Kbit SRAM each to dual-port FIFOs that smooth traffic between the telecom line and an upstream processor. The 240-RQFP footprint matches the original Altera reference designs, allowing direct retrofit into FLEX 10K service cards without PCB rework. Programming is performed with MAX+PLUS II, which is still the toolchain of record for installed telecom fleets worldwide.

Recommended

EPF10K30RI240-4N · Intel EPF10K50RC240-4N (Commercial-temperature drop-in alternative for indoor cabinets)
🏭

Industrial Control Bridging

The EPF10K50RI240-4N's industrial -40 °C to 85 °C temperature range and 5 V PCI-compatible MultiVolt I/O make it a reliable bridge in industrial PLC backplanes. Its 189 user I/Os map directly to opto-isolated 24 V field I/O modules through level shifters, while the 5 V VCCINT rail is immune to the noisy 24 V supply transients that plague lower-voltage FPGAs. With 360 LABs and 20,480 logic elements, the device comfortably hosts parallel motor-control state machines, encoder quadrature decoders, and PROFIBUS/Modbus glue. The exposed thermal pad on the 240-RQFP package provides the heat dissipation needed for continuous industrial duty cycles. Designers retain a long-term software path in MAX+PLUS II without needing to re-train on Quartus.

Recommended

EPF10K50RC240-3 · Altera EPF10K50EQC240-3N · Intel
🖥️

Legacy ISA/PCI Peripheral Cards

The EPF10K50RI240-4N was a workhorse for PCI 2.1-compliant peripherals in the late 1990s and continues to populate legacy test, instrumentation, and data-acquisition cards. Its built-in PCI pull-up clamping diode and 5 V PCI-compliant I/O bank remove the need for external bus transceivers, while 189 user I/Os are sufficient for 32-bit PCI plus local bus expansion. The on-chip EABs serve as dual-port FIFOs that decouple PCI bursts from analog front-end data streams, and the 125 MHz internal frequency supports 33 MHz PCI timing with margin. Designers working on long-life-cycle medical, aerospace, and military programs can extend the supply of original boards using FLEX 10K drop-in variants.

Recommended

EPF10K50RC240-4N (Commercial-temperature PCI card variant) EPF10K50EQC240-3N · Intel
🎧

DSP-to-Microcontroller Bridge / Co-processor

The EPF10K50RI240-4N is a natural choice for bridging a host microcontroller to a DSP co-processor in legacy embedded designs. The 50K-gate capacity accommodates FIFO-based data paths between an SHARC or TMS320 DSP and an 8051-class host, while the MultiVolt I/O allows direct connection to 3.3 V DSPs and 5 V microcontrollers without external level shifters. The 10 EABs (each 2 Kbit) supply the dual-port RAM that pipelines Q-format samples between algorithms, and the 189 user I/Os handle host parallel ports, DMA handshakes, and JTAG. The exposed pad on the 240-RQFP package provides the headroom needed when both DSP and host operate at full clock under sustained DSP load.

Recommended

EPF10K100EQC240-3N · Intel EPF10K30RI240-4N · Intel
⚡

5 V to 3.3 V Level Translation / Glue Logic Hub

The EPF10K50RI240-4N's MultiVolt I/O interface is its standout feature for mixed-voltage board designs. By tying VCCIO to either 3.3 V or 5 V on a per-bank basis, each I/O bank can talk directly to the corresponding voltage domain without external level shifters, eliminating dozens of discrete parts. The 189 user I/Os and 50K-gate logic capacity make this part ideal as a central 'glue hub' that consolidates bus arbitration, chip-select generation, and interrupt routing between a 5 V microcontroller and 3.3 V peripherals such as SDRAM, flash, and ADCs. The exposed thermal pad supports the continuous switching activity of bus multiplexing without thermal derating.

Recommended

EPF10K50RC240-3 · Altera EPF10K50EQC240-3N · Intel
✈️

Long-Life-Cycle Aerospace / Defense Sustainment

The EPF10K50RI240-4N remains in service in aerospace and defense systems certified under long-life programs that pre-date Cyclone and MAX families. Its 5 V VCCINT and 240-RQFP package match the original Altera reference designs that are now maintained as form-fit-function replacements. The 189 user I/Os are sufficient for MIL-STD-1553 databus interfaces, ARINC 429 transmitters, and legacy display controllers. Industrial temperature range (-40 °C to 85 °C) covers most avionics bays, and the exposed thermal pad provides the heat-spreading path needed for sealed chassis without forced-air cooling. For certified programs, FLEX 10K variants from the same lot are a drop-in substitution, easing obsolescence management while the certification paperwork remains valid.

Recommended

EPF10K50RC240-4N (Commercial-temp variant for indoor defense electronics) EPF10K100EQC240-3N · Intel

Recommended Products Summary

EPF10K30RI240-4N Intel Used in: Legacy Telecom Interface Glue Logic, DSP-to-Microcontroller Bridge / Co-processor EPF10K50RC240-4N Commercial-temperature drop-in alternative for indoor cabinets Used in: Legacy Telecom Interface Glue Logic, Legacy ISA/PCI Peripheral Cards, Long-Life-Cycle Aerospace / Defense Sustainment EPF10K50RC240-3 Altera Used in: Industrial Control Bridging, 5 V to 3.3 V Level Translation / Glue Logic Hub EPF10K50EQC240-3N Intel Used in: Industrial Control Bridging, Legacy ISA/PCI Peripheral Cards, 5 V to 3.3 V Level Translation / Glue Logic Hub EPF10K100EQC240-3N Intel Used in: DSP-to-Microcontroller Bridge / Co-processor, Long-Life-Cycle Aerospace / Defense Sustainment
What is the EPF10K50RI240-4N?
The EPF10K50RI240-4N is a member of the Altera FLEX 10K family of SRAM-based FPGAs, providing 50,000 typical gates, 2,880 logic cells, 20,480 logic elements, 360 LABs and 189 user I/Os in a 240-pin RQFP package with exposed pad. It runs from a 5 V VCCINT rail, supports MultiVolt 3.3 V or 5 V I/O via separate VCCIO, and is speed-grade -4. Source: Altera FLEX 10K datasheet (DSF10K50 family).
How many user I/Os does the EPF10K50RI240-4N have?
The EPF10K50RI240-4N provides 189 user I/O pins per the Altera datasheet DSF10K50. Note that some third-party datasheet mirrors report 274 user I/Os, but the authoritative Altera specification for the 240-pin RQFP package is 189. Verify pinout against the 240-RQFP mechanical drawing before assigning signals to keep-out pins.
Is the EPF10K50RI240-4N still in production?
The EPF10K50RI240-4N is classified as obsolete / not recommended for new designs (NRND-equivalent) by Intel (formerly Altera). The FLEX 10K family has been succeeded by the Cyclone and MAX families, and authorized distributor stock is limited. For new designs, plan to migrate to a Cyclone IV or Cyclone 10 LP equivalent; use this part only for sustaining legacy boards.
Where can I buy the EPF10K50RI240-4N today?
Authorized distributors (DigiKey, Mouser) currently list very limited stock; the part is officially obsolete, so pricing fluctuates sharply with remaining inventory. Independent distributors such as Heisener, Win Source and Veswin carry stock but be cautious of counterfeit risk and request traceability documentation. As of 2026-09-11, indicative pricing ranges from $78.50 unit at qty 1 down to $52.75 at qty 1000.
What is the price of the EPF10K50RI240-4N?
The unit price of the EPF10K50RI240-4N, as of 2026-09-11, is approximately $78.50 at qty 1, dropping to roughly $52.75 at qty 1000 from open-market sources. Authorized Altera/Intel pricing is no longer available because the part is obsolete; independent distributors price based on remaining stock, which causes wide quote-to-quote variance. Always request a formal quote and check warranty terms before procuring.
What is the lead time for the EPF10K50RI240-4N?
Lead time for the EPF10K50RI240-4N is highly variable because the part is obsolete. Heisener currently advertises shipment within the same week, while other open-market distributors quote 2 to 6 weeks depending on lot availability. For production programs, Intel recommends a last-time-buy followed by a migration to Cyclone IV or Cyclone 10 LP. Confirm lead time with a written quote before placing an order.
Is the EPF10K50RI240-4N in stock at distributors?
Stock at major distributors such as DigiKey and Mouser is extremely limited or zero for the EPF10K50RI240-4N as of 2026-09-11. Independent distributors still list thousands of pieces from decommissioned lots, but buyers should validate date codes, lot traceability, and request C-of-C documentation to mitigate the risk of refurbished or remarked units.
What is the difference between EPF10K50RI240-4N and EPF10K50RC240-4N?
The EPF10K50RI240-4N is the industrial-temperature (-40 °C to 85 °C) variant in the 240-RQFP package, while the EPF10K50RC240-4N is the commercial-temperature (0 °C to 70 °C) variant. Both share the same 240-RQFP footprint, 189 user I/Os, 50K-gate FLEX 10K logic capacity and 5 V core, so they are pin-compatible drop-in replacements if your system can tolerate the narrower commercial temperature range.
Can the EPF10K50RC240-3 replace the EPF10K50RI240-4N?
Yes, the EPF10K50RC240-3 is a drop-in functional alternative on the same 240-RQFP footprint but with a faster -3 speed grade. The RC suffix indicates commercial temperature range (0 °C to 70 °C) rather than industrial, so verify that your chassis stays within commercial limits. Both parts share identical pinout, MultiVolt I/O, and 50K-gate logic resources, so a simple swap with new timing closure in MAX+PLUS II is sufficient.
What is the best drop-in replacement for the EPF10K50RI240-4N?
The best same-brand drop-in replacement is the EPF10K50RC240-4N (commercial-temperature, 240-RQFP, same 50K-gate FLEX 10K logic). For a slight speed uplift, the EPF10K50RC240-3 is also a drop-in alternative on the same footprint. If your application can tolerate a board respin, migrate to a Cyclone IV EP4CE30 or Cyclone 10 LP 10CL025 device for long-term supply security.
Where can I download the EPF10K50RI240-4N datasheet PDF?
The official Altera FLEX 10K family datasheet is hosted by Intel/Altera as document DSF10K50. The PDF can be downloaded from alterasemi.com/datasheet/alterasemi/EPF10K50RI240-4.pdf and is mirrored on datasheets.com, Octopart, and AiPCBA. The 129-page document covers device architecture, electrical characteristics, pinout, package outlines, and timing specifications for the entire FLEX 10K family.
Where is the EPF10K50RI240-4N pinout documented?
The EPF10K50RI240-4N pinout is documented in the FLEX 10K family datasheet, chapter 'Device and Package Cross Reference' followed by 'Pin-Outs' for the 240-pin RQFP package. The mechanical drawing appears in the 'Package Outlines' section on page 44 of the datasheet. The pinout table identifies dedicated pins (VCCINT, VCCIO, GND, JTAG TCK/TMS/TDO/TDI, nCONFIG, nSTATUS, CONF_DONE, MSEL0/1, DCLK) and the 189 user I/Os.
What software programs the EPF10K50RI240-4N?
The EPF10K50RI240-4N is programmed using the legacy Altera MAX+PLUS II toolchain (version 10.23 or older), which is still bundled with Altera legacy support. Quartus Prime does NOT directly target the FLEX 10K family, so design files must be retained in MAX+PLUS II for the life of the product. For new designs targeting the same footprint, migrate to a Quartus-supported Cyclone IV device.
What is the operating voltage of the EPF10K50RI240-4N?
The EPF10K50RI240-4N operates with VCCINT = 5 V ±5 % and a configurable VCCIO = 3.3 V or 5 V (MultiVolt). The MultiVolt I/O interface allows each bank to interface with 3.3 V peripherals, 5 V TTL, or PCI signaling, by tying VCCIO to the corresponding rail while VCCINT remains at 5 V. Source: Altera FLEX 10K datasheet DSF10K50, DC Characteristics table.
What is the difference between EPF10K50RI240-4N and EPF10K30RI240-4N?
The EPF10K50RI240-4N is the 50K-gate density variant (2,880 cells, 360 LABs) of the FLEX 10K family in the 240-RQFP package, while the EPF10K30RI240-4N is the lower-density 30K-gate variant (1,728 cells, 216 LABs) in the same 240-RQFP package. Both share the same pinout on the 240-RQFP package, so the EPF10K50 is a strict superset drop-in upgrade for any design using the EPF10K30 on this footprint.

Engineering reference data for EPF10K50RI240-4N — comparison, design guidance, and compliance information.

Selection Guide

Choose the EPF10K50RI240-4N when you need 50K-gate FLEX 10K capacity, 189 user I/Os and industrial -40C to +85C temperature range on the 240-RQFP footprint for a legacy design that must stay in service. Choose EPF10K50RC240-4N as a drop-in alternative if your chassis stays within 0C to +70C (commercial) - same pinout, same package, lower cost. Choose EPF10K50RC240-3 if you need a faster -3 speed grade with margin on the 240-RQFP footprint. Choose EPF10K30RI240-4N if you can fit your design into 30K gates and want a cheaper drop-in on the same 240-RQFP package. For new designs, migrate to a Cyclone IV EP4CE30 or Cyclone 10 LP 10CL025 on a modern footprint; for sustaining existing boards, all five drop-in alternatives share the same 240-RQFP mechanical land pattern.

Comparison with Alternatives

Parameter This Product EPF10K50RC240-4N EPF10K50RC240-3 EPF10K30RI240-4N EPF10K50EQC240-3N EPF10K100EQC240-3N
Brand Altera (Intel) Altera (Intel) Altera (Intel) Altera (Intel) Altera (Intel) Altera (Intel)
Package 240-RQFP (with Exposed Pad) 240-RQFP - same 240-RQFP - same 240-RQFP - same 240-RQFP - same 240-RQFP - same
Family / Density FLEX 10K, 50K gates / 2,880 cells FLEX 10K, 50K gates / 2,880 cells FLEX 10K, 50K gates / 2,880 cells FLEX 10K, 30K gates / 1,728 cells (-40%) FLEX 10KE, 50K gates / 2,880 cells FLEX 10KE, 100K gates / 4,992 cells (+73%)
Speed Grade -4 (slower) -4 (same) -3 (faster) -4 (same) -3 (faster) -3 (faster)
Core Voltage (VCCINT) 5 V 5 V 5 V 5 V 2.5 V (FLEX 10KE) 2.5 V (FLEX 10KE)
I/O Voltage (VCCIO) 3.3 V or 5 V MultiVolt 3.3 V or 5 V MultiVolt 3.3 V or 5 V MultiVolt 3.3 V or 5 V MultiVolt 2.5 V or 3.3 V MultiVolt 2.5 V or 3.3 V MultiVolt
User I/Os 189 189 189 189 (same package) 189 189
Temperature Range Industrial -40C to +85C Commercial 0C to +70C Commercial 0C to +70C Industrial -40C to +85C Commercial 0C to +70C Commercial 0C to +70C
Lifecycle Status Obsolete Obsolete Obsolete Obsolete NRND (near end of life) NRND (near end of life)

Key Differentiators

  • Industrial temperature range on the same 240-RQFP footprint as commercial variants (vs EPF10K50RC240-4N)
  • Lower-density drop-in alternative available for cost optimization (vs EPF10K30RI240-4N)
  • MultiVolt I/O supports mixed-voltage designs without external level shifters (vs EPF10K50EQC240-3N (FLEX 10KE))

Design Notes

Estimated: the EPF10K50RI240-4N draws approximately 250-400 mA quiescent current on VCCINT at 5 V (1.25-2 W), scaling with toggle rate. Route VCCINT and VCCIO through wide power planes with bulk 100 uF + 10 uF + 0.1 uF ceramic decoupling at each pin. Separate VCCIO per bank: each MultiVolt bank can run at 3.3 V or 5 V independently, so use ferrite beads to isolate noisy banks from quiet ones. The exposed thermal pad MUST be soldered to a continuous ground plane for the datasheet's thermal resistance rating.

Use the Altera-supplied 240-RQFP land pattern from the Package Outlines section of the FLEX 10K datasheet. Place configuration EPROM (e.g., EPC2 or EPC16) within 100 mm of the FPGA to meet DCLK/DATA0 rise-time budgets. The MSEL0/MSEL1 pins select PS (passive serial), PPS, or JTAG configuration mode; add 10 kohm pull-ups to nCONFIG and 10 kohm pull-down to nSTATUS as recommended by the datasheet.

Do NOT attempt to program the EPF10K50RI240-4N with Quartus Prime - Quartus does not support the FLEX 10K family. Continue using MAX+PLUS II 10.23 baseline, which is the final toolchain release for FLEX 10K. The 'I' in the part number indicates industrial temperature range; verify that your chassis stays within -40C to +85C or the part may exhibit timing violations or reduced life. SRAM-based FPGAs lose configuration on power-down - always provide an external configuration PROM for production designs.

Compliance Information

RoHS
Unknown
REACH
Unknown
AEC-Q100
Not Applicable
Lead Free
Unknown
Halogen Free
Unknown
Conflict Minerals
Unknown

Compliance data not present in the verified web snippets. The -4N suffix historically indicates lead-free / Pb-free NiPdAu lead finish on the 240-RQFP package, but a written compliance certificate must be requested from the distributor for the specific lot. AEC-Q100 is not applicable because FPGAs are not automotive-qualified by Altera / Intel.

Related Searches

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Related Components & Terms

Altera Intel EPF10K50RI240-4N EPF10K50RC240-4N EPF10K50RC240-3 EPF10K30RI240-4N EPF10K50EQC240-3N EPF10K100EQC240-3N FLEX 10K Field Programmable Gate Array FPGA programmable logic device PLD CPLD Logic Array Block LAB Embedded Array Block EAB MultiVolt I/O VCCINT VCCIO RQFP-240 RQFP exposed thermal pad MAX+PLUS II Quartus PCI JTAG nCONFIG nSTATUS CONF_DONE DCLK RoHS AEC-Q100 industrial temperature range commercial temperature range SRAM-based FPGA configuration PROM EPC2 EPC16 Cyclone IV Cyclone 10 LP level translation 5 V to 3.3 V glue logic telecom interface industrial control DSP bridge
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