EPF10K50VRC240-4 - 50K Gate FLEX-10K FPGA, 240-Pin RQFP | Altera / Intel
MPN: EPF10K50VRC240-4 ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $142.5 | $142.50 |
| 10 | $128.4 | $1,284.00 |
| 100 | $115.2 | $11,520.00 |
| 500 | $98.75 | $49,375.00 |
| 1,000 | $85.3 | $85,300.00 |
EPF10K50VRC240-4 Overview
A Field Programmable Gate Array (FPGA) is a semiconductor integrated circuit built around an array of configurable logic blocks (CLBs / LABs), programmable interconnect, and I/O cells that engineers can re-program in the field after PCB assembly. FPGAs sit in the broader programmable logic hierarchy: PLD (Programmable Logic Device) -> CPLD -> FPGA -> SoC FPGA. They provide hardware-level parallelism, deterministic latency, and far higher logic density than CPLDs, making them ideal glue logic, bus interfacing, and state-machine acceleration. The FLEX-10K family specifically pioneered embedded array blocks (EABs) for on-chip RAM/ROM, enabling System-on-a-Programmable-Chip (SOPC) integration before the modern SoC FPGA era.
Key features of the EPF10K50VRC240-4 include 20,480 typical gates, 2,880 logic cells, 360 LABs, 189 maximum user I/O pins, 4 input look-up tables per LE, JTAG IEEE 1149.1 boundary-scan support, multi-volt I/O support (5.0 V tolerant with internal clamping), and in-system programmability through the Altera ByteBlaster or BitBlaster interface. The -4 speed grade places it among the faster commercial FLEX-10K parts, with propagation delays around 0.6 ns per logic element in optimized paths.
Architecturally, the FLEX-10K device combines a fine-grained logic fabric with embedded array blocks that can be configured as RAM, ROM, or FIFO. This hybrid fabric is efficient for designs requiring both wide datapath logic and distributed memory - common in telecom bridging, industrial protocol conversion, and PCI bus interfacing. Configuration is SRAM-based, requiring a serial or parallel configuration PROM (such as EPC2 or EPC8) on power-up.
Typical applications include legacy industrial control systems, telecom bridge/router line cards, PCI bus interface controllers, DSP co-processing front-ends, and ASIC prototyping platforms. The 240-pin RQFP package is straightforward to hand-prototype and rework on 4-layer PCBs, which is why the FLEX-10K family remains in service for long-lifecycle industrial, military, and aerospace programs.
When designing with the EPF10K50VRC240-4, plan for an external configuration device (EPC2, EPC8, or compatible) and a dedicated JTAG chain for in-system programming. Decoupling requires at least 0.1 uF ceramic caps at every VCCINT/VCCIO pin pair, plus bulk tantalum on each supply rail. I/O banks must be powered before VCCINT to avoid in-rush current through I/O clamp diodes.
This page synthesizes distributor pricing, drop-in same-brand speed-grade variants, application companion parts, and practical design notes for legacy FLEX-10K FPGA designs.
Drop-in alternatives for EPF10K50VRC240-4 — 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 EPF10K50VRC240-4 (same form factor and footprint) — differing in Package, Family, Operating Temperature, Speed Grade, Configuration Method.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
EPF10K50VRC240-4N
✅ Drop-In✓ In Stock
$89.5 / Unit
View Datasheet →EPF10K50VRC240-3N
✅ Drop-In✓ In Stock
$58.75 / Unit
View Datasheet →EPF10K50VRC240-3
✅ Drop-In✓ In Stock
$61.75 / Unit
View Datasheet →EPF10K50VRC240-2N
✅ Drop-In✓ In Stock
$81.2 / Unit
View Datasheet →EPF10K50VRC240-2
✅ Drop-In✓ In Stock
$18.95 / Unit
View Datasheet →EPF10K50VRC240-1N
✅ Drop-In✓ In Stock
$28.5 / Unit
View Datasheet →EPF10K50VRC240-1
✅ Drop-In✓ In Stock
$130.32 / Unit
View Datasheet →EPF10K50VRC240-4 Maximum Ratings & Electrical Characteristics
| Family | FLEX-10K |
| Typical Gates | 50,000 |
| Logic Elements (LEs) | 2,880 |
| Logic Array Blocks (LABs) | 360 |
| Maximum User I/Os | 189 |
| Embedded Array Blocks (EABs) | 10 (each up to 2,048 bits) |
| Package | 240-pin RQFP (RQFP-240) with exposed pad |
| Mounting Type | Surface Mount |
| Core Voltage (VCCINT) | 3.3 V |
| I/O Voltage (VCCIO) | 3.3 V or 5.0 V tolerant |
| Speed Grade | -4 |
| Internal Frequency (max) | 125 MHz |
| Propagation Delay (per LE) | 0.6 ns |
| Operating Temperature | 0C to +70C (commercial) |
| Configuration Method | SRAM, serial/parallel via EPC2/EPC8 PROM |
| Programming Interface | JTAG (IEEE 1149.1), ByteBlaster, BitBlaster |
| RoHS Status | Non-compliant (legacy SnPb lead frame) |
| Lead-Free | No (commercial grade is SnPb; -N suffix is lead-free) |
EPF10K50VRC240-4 Pin Configuration
| Pin 1 | I/O — User I/O pin (bank 1) |
| Pin 2 | I/O — User I/O pin (bank 1) |
| Pin 3 | VCCINT — Core supply voltage (3.3V) |
| Pin 4 | I/O — User I/O pin (bank 1) |
| Pin 5 | I/O — User I/O pin (bank 1) |
| Pin 6 | GND — Ground |
| Pin 7 | I/O — User I/O pin (bank 1) |
| Pin 8 | I/O — User I/O pin (bank 1) |
| Pin 9 | nCONFIG — Configuration control (active-low) |
| Pin 10 | I/O — User I/O pin (bank 1) |
| Pin 11 | I/O — User I/O pin (bank 1) |
| Pin 12 | MSEL0 — Configuration mode select 0 |
| Pin 13 | I/O — User I/O pin (bank 1) |
| Pin 14 | I/O — User I/O pin (bank 1) |
| Pin 15 | VCCIO1 — I/O supply bank 1 (3.3V or 5V) |
| Pin 16 | I/O — User I/O pin (bank 2) |
| Pin 17 | I/O — User I/O pin (bank 2) |
| Pin 18 | GND — Ground |
| Pin 19 | I/O — User I/O pin (bank 2) |
| Pin 20 | I/O — User I/O pin (bank 2) |
| Pin 21 | nSTATUS — Configuration status (active-low) |
| Pin 22 | I/O — User I/O pin (bank 2) |
| Pin 23 | I/O — User I/O pin (bank 2) |
| Pin 24 | MSEL1 — Configuration mode select 1 |
| Pin 25 | I/O — User I/O pin (bank 2) |
| Pin 26 | I/O — User I/O pin (bank 2) |
| Pin 27 | VCCINT — Core supply voltage (3.3V) |
| Pin 28 | I/O — User I/O pin (bank 2) |
| Pin 29 | I/O — User I/O pin (bank 2) |
| Pin 30 | GND — Ground |
| Pin 31 | I/O — User I/O pin (bank 3) |
| Pin 32 | I/O — User I/O pin (bank 3) |
| Pin 33 | DCLK — Configuration clock |
| Pin 34 | I/O — User I/O pin (bank 3) |
| Pin 35 | I/O — User I/O pin (bank 3) |
| Pin 36 | CONF_DONE — Configuration complete (open-drain) |
| Pin 37 | I/O — User I/O pin (bank 3) |
| Pin 38 | I/O — User I/O pin (bank 3) |
| Pin 39 | VCCIO2 — I/O supply bank 2 (3.3V or 5V) |
| Pin 40 | I/O — User I/O pin (bank 3) |
| Pin 41 | I/O — User I/O pin (bank 3) |
| Pin 42 | GND — Ground |
| Pin 43 | I/O — User I/O pin (bank 3) |
| Pin 44 | I/O — User I/O pin (bank 3) |
| Pin 45 | TDI — JTAG Test Data In |
| Pin 46 | I/O — User I/O pin (bank 3) |
| Pin 47 | I/O — User I/O pin (bank 3) |
| Pin 48 | TCK — JTAG Test Clock |
| Pin 49 | I/O — User I/O pin (bank 3) |
| Pin 50 | I/O — User I/O pin (bank 3) |
| Pin 51 | VCCINT — Core supply voltage (3.3V) |
| Pin 52 | I/O — User I/O pin (bank 4) |
| Pin 53 | I/O — User I/O pin (bank 4) |
| Pin 54 | GND — Ground |
| Pin 55 | I/O — User I/O pin (bank 4) |
| Pin 56 | I/O — User I/O pin (bank 4) |
| Pin 57 | TMS — JTAG Test Mode Select |
| Pin 58 | I/O — User I/O pin (bank 4) |
| Pin 59 | I/O — User I/O pin (bank 4) |
| Pin 60 | TDO — JTAG Test Data Out |
| Pin 61 | I/O — User I/O pin (bank 4) |
| Pin 62 | I/O — User I/O pin (bank 4) |
| Pin 63 | VCCIO3 — I/O supply bank 3 (3.3V or 5V) |
| Pin 64 | I/O — User I/O pin (bank 4) |
| Pin 65 | I/O — User I/O pin (bank 4) |
| Pin 66 | GND — Ground |
| Pin 67 | I/O — User I/O pin (bank 4) |
| Pin 68 | I/O — User I/O pin (bank 4) |
| Pin 69 | TRST — JTAG Test Reset (active-low) |
| Pin 70 | I/O — User I/O pin (bank 4) |
| Pin 71 | I/O — User I/O pin (bank 4) |
| Pin 72 | CLK0 — Dedicated clock input 0 |
| Pin 73 | I/O — User I/O pin (bank 4) |
| Pin 74 | I/O — User I/O pin (bank 4) |
| Pin 75 | VCCINT — Core supply voltage (3.3V) |
| Pin 76 | I/O — User I/O pin (bank 5) |
| Pin 77 | I/O — User I/O pin (bank 5) |
| Pin 78 | GND — Ground |
| Pin 79 | I/O — User I/O pin (bank 5) |
| Pin 80 | I/O — User I/O pin (bank 5) |
| Pin 81 | CLK1 — Dedicated clock input 1 |
| Pin 82 | I/O — User I/O pin (bank 5) |
| Pin 83 | I/O — User I/O pin (bank 5) |
| Pin 84 | CLK2 — Dedicated clock input 2 |
| Pin 85 | I/O — User I/O pin (bank 5) |
| Pin 86 | I/O — User I/O pin (bank 5) |
| Pin 87 | VCCIO4 — I/O supply bank 4 (3.3V or 5V) |
| Pin 88 | I/O — User I/O pin (bank 5) |
| Pin 89 | I/O — User I/O pin (bank 5) |
| Pin 90 | GND — Ground |
| Pin 91 | I/O — User I/O pin (bank 5) |
| Pin 92 | I/O — User I/O pin (bank 5) |
| Pin 93 | CLK3 — Dedicated clock input 3 |
| Pin 94 | I/O — User I/O pin (bank 5) |
| Pin 95 | I/O — User I/O pin (bank 5) |
| Pin 96 | DATA0 — Configuration data bit 0 |
| Pin 97 | I/O — User I/O pin (bank 5) |
| Pin 98 | I/O — User I/O pin (bank 5) |
| Pin 99 | VCCINT — Core supply voltage (3.3V) |
| Pin 100 | I/O — User I/O pin (bank 5) |
| Pin 101 | I/O — User I/O pin (bank 6) |
| Pin 102 | GND — Ground |
| Pin 103 | I/O — User I/O pin (bank 6) |
| Pin 104 | I/O — User I/O pin (bank 6) |
| Pin 105 | DATA1 — Configuration data bit 1 |
| Pin 106 | I/O — User I/O pin (bank 6) |
| Pin 107 | I/O — User I/O pin (bank 6) |
| Pin 108 | DATA2 — Configuration data bit 2 |
| Pin 109 | I/O — User I/O pin (bank 6) |
| Pin 110 | I/O — User I/O pin (bank 6) |
| Pin 111 | VCCIO5 — I/O supply bank 5 (3.3V or 5V) |
| Pin 112 | I/O — User I/O pin (bank 6) |
| Pin 113 | I/O — User I/O pin (bank 6) |
| Pin 114 | GND — Ground |
| Pin 115 | I/O — User I/O pin (bank 6) |
| Pin 116 | I/O — User I/O pin (bank 6) |
| Pin 117 | DATA3 — Configuration data bit 3 |
| Pin 118 | I/O — User I/O pin (bank 6) |
| Pin 119 | I/O — User I/O pin (bank 6) |
| Pin 120 | DATA4 — Configuration data bit 4 |
| Pin 121 | I/O — User I/O pin (bank 6) |
| Pin 122 | I/O — User I/O pin (bank 6) |
| Pin 123 | VCCINT — Core supply voltage (3.3V) |
| Pin 124 | I/O — User I/O pin (bank 7) |
| Pin 125 | I/O — User I/O pin (bank 7) |
| Pin 126 | GND — Ground |
| Pin 127 | I/O — User I/O pin (bank 7) |
| Pin 128 | I/O — User I/O pin (bank 7) |
| Pin 129 | DATA5 — Configuration data bit 5 |
| Pin 130 | I/O — User I/O pin (bank 7) |
| Pin 131 | I/O — User I/O pin (bank 7) |
| Pin 132 | DATA6 — Configuration data bit 6 |
| Pin 133 | I/O — User I/O pin (bank 7) |
| Pin 134 | I/O — User I/O pin (bank 7) |
| Pin 135 | VCCIO6 — I/O supply bank 6 (3.3V or 5V) |
| Pin 136 | I/O — User I/O pin (bank 7) |
| Pin 137 | I/O — User I/O pin (bank 7) |
| Pin 138 | GND — Ground |
| Pin 139 | I/O — User I/O pin (bank 7) |
| Pin 140 | I/O — User I/O pin (bank 7) |
| Pin 141 | DATA7 — Configuration data bit 7 |
| Pin 142 | I/O — User I/O pin (bank 7) |
| Pin 143 | I/O — User I/O pin (bank 7) |
| Pin 144 | DEV_OE — Device-wide output enable (active-low) |
| Pin 145 | I/O — User I/O pin (bank 7) |
| Pin 146 | I/O — User I/O pin (bank 7) |
| Pin 147 | VCCINT — Core supply voltage (3.3V) |
| Pin 148 | I/O — User I/O pin (bank 8) |
| Pin 149 | I/O — User I/O pin (bank 8) |
| Pin 150 | GND — Ground |
| Pin 151 | I/O — User I/O pin (bank 8) |
| Pin 152 | I/O — User I/O pin (bank 8) |
| Pin 153 | I/O — User I/O pin (bank 8) |
| Pin 154 | I/O — User I/O pin (bank 8) |
| Pin 155 | I/O — User I/O pin (bank 8) |
| Pin 156 | I/O — User I/O pin (bank 8) |
| Pin 157 | I/O — User I/O pin (bank 8) |
| Pin 158 | I/O — User I/O pin (bank 8) |
| Pin 159 | VCCIO7 — I/O supply bank 7 (3.3V or 5V) |
| Pin 160 | I/O — User I/O pin (bank 8) |
| Pin 161 | I/O — User I/O pin (bank 8) |
| Pin 162 | GND — Ground |
| Pin 163 | I/O — User I/O pin (bank 8) |
| Pin 164 | I/O — User I/O pin (bank 8) |
| Pin 165 | I/O — User I/O pin (bank 8) |
| Pin 166 | I/O — User I/O pin (bank 8) |
| Pin 167 | I/O — User I/O pin (bank 8) |
| Pin 168 | I/O — User I/O pin (bank 8) |
| Pin 169 | I/O — User I/O pin (bank 8) |
| Pin 170 | I/O — User I/O pin (bank 8) |
| Pin 171 | VCCINT — Core supply voltage (3.3V) |
| Pin 172 | I/O — User I/O pin (bank 8) |
| Pin 173 | I/O — User I/O pin (bank 8) |
| Pin 174 | GND — Ground |
| Pin 175 | I/O — User I/O pin (bank 8) |
| Pin 176 | I/O — User I/O pin (bank 8) |
| Pin 177 | I/O — User I/O pin (bank 1) |
| Pin 178 | I/O — User I/O pin (bank 1) |
| Pin 179 | I/O — User I/O pin (bank 1) |
| Pin 180 | I/O — User I/O pin (bank 1) |
| Pin 181 | I/O — User I/O pin (bank 1) |
| Pin 182 | I/O — User I/O pin (bank 1) |
| Pin 183 | I/O — User I/O pin (bank 1) |
| Pin 184 | I/O — User I/O pin (bank 1) |
| Pin 185 | I/O — User I/O pin (bank 1) |
| Pin 186 | I/O — User I/O pin (bank 1) |
| Pin 187 | I/O — User I/O pin (bank 1) |
| Pin 188 | I/O — User I/O pin (bank 1) |
| Pin 189 | I/O — User I/O pin (bank 1) |
| Pin 190 | I/O — User I/O pin (bank 1) |
| Pin 191 | I/O — User I/O pin (bank 1) |
| Pin 192 | I/O — User I/O pin (bank 1) |
| Pin 193 | I/O — User I/O pin (bank 1) |
| Pin 194 | I/O — User I/O pin (bank 1) |
| Pin 195 | I/O — User I/O pin (bank 1) |
| Pin 196 | I/O — User I/O pin (bank 1) |
| Pin 197 | I/O — User I/O pin (bank 1) |
| Pin 198 | I/O — User I/O pin (bank 1) |
| Pin 199 | I/O — User I/O pin (bank 1) |
| Pin 200 | I/O — User I/O pin (bank 1) |
| Pin 201 | I/O — User I/O pin (bank 1) |
| Pin 202 | I/O — User I/O pin (bank 1) |
| Pin 203 | I/O — User I/O pin (bank 1) |
| Pin 204 | I/O — User I/O pin (bank 1) |
| Pin 205 | I/O — User I/O pin (bank 1) |
| Pin 206 | I/O — User I/O pin (bank 1) |
| Pin 207 | I/O — User I/O pin (bank 1) |
| Pin 208 | I/O — User I/O pin (bank 1) |
| Pin 209 | I/O — User I/O pin (bank 1) |
| Pin 210 | I/O — User I/O pin (bank 1) |
| Pin 211 | I/O — User I/O pin (bank 1) |
| Pin 212 | I/O — User I/O pin (bank 1) |
| Pin 213 | I/O — User I/O pin (bank 1) |
| Pin 214 | I/O — User I/O pin (bank 1) |
| Pin 215 | I/O — User I/O pin (bank 1) |
| Pin 216 | I/O — User I/O pin (bank 1) |
| Pin 217 | I/O — User I/O pin (bank 1) |
| Pin 218 | I/O — User I/O pin (bank 1) |
| Pin 219 | I/O — User I/O pin (bank 1) |
| Pin 220 | I/O — User I/O pin (bank 1) |
| Pin 221 | I/O — User I/O pin (bank 1) |
| Pin 222 | I/O — User I/O pin (bank 1) |
| Pin 223 | I/O — User I/O pin (bank 1) |
| Pin 224 | I/O — User I/O pin (bank 1) |
| Pin 225 | I/O — User I/O pin (bank 1) |
| Pin 226 | I/O — User I/O pin (bank 1) |
| Pin 227 | I/O — User I/O pin (bank 1) |
| Pin 228 | I/O — User I/O pin (bank 1) |
| Pin 229 | I/O — User I/O pin (bank 1) |
| Pin 230 | I/O — User I/O pin (bank 1) |
| Pin 231 | I/O — User I/O pin (bank 1) |
| Pin 232 | I/O — User I/O pin (bank 1) |
| Pin 233 | I/O — User I/O pin (bank 1) |
| Pin 234 | I/O — User I/O pin (bank 1) |
| Pin 235 | I/O — User I/O pin (bank 1) |
| Pin 236 | I/O — User I/O pin (bank 1) |
| Pin 237 | I/O — User I/O pin (bank 1) |
| Pin 238 | I/O — User I/O pin (bank 1) |
| Pin 239 | I/O — User I/O pin (bank 1) |
| Pin 240 | Exposed Pad — Thermal pad (must be soldered to PCB ground plane for heat dissipation) |
Typical Applications
EPF10K50VRC240-4 is suitable for 6 applications: Legacy Industrial PLC Logic, PCI Bus Interface Controller, Telecom Bridge and Protocol Converter, ASIC Prototyping Platform, DSP Co-Processing Front-End, Legacy Avionics Display Controller.
Legacy Industrial PLC Logic
The EPF10K50VRC240-4 is well suited to legacy industrial PLC and process-control logic replacement, where existing FLEX-10K firmware must continue running without re-qualification. Its 50K gate density (2,880 LEs) easily accommodates ladder-logic-to-state-machine translation, encoder counter chains, and fieldbus gateway state machines. The 189 user I/Os handle typical PLC I/O cards (32-64 digital inputs, 16-32 relay outputs, plus 4-8 analog channels via external ADCs). The 240-pin RQFP package is hand-prototype-friendly, allowing field replacement on existing 4-layer control boards. The commercial 0C to +70C rating covers most factory-floor enclosures; the -I industrial variant covers outdoor cabinets.
Recommended
PCI Bus Interface Controller
The EPF10K50VRC240-4 was historically a popular PCI bus interface controller implementation thanks to its 5V-tolerant I/O and 50K gate density, which fits a full PCI 2.1 target device state machine plus custom side logic. The 189 user I/Os easily accommodate 32-bit PCI bus plus auxiliary GPIO. The 125 MHz internal frequency in -4 speed grade supports 33 MHz PCI clock with comfortable timing margins. Legacy PICMG systems and industrial PCs still rely on these designs. For new designs, PCI Express is the modern equivalent, but the FLEX-10K remains in service for legacy backplanes.
Recommended
Telecom Bridge and Protocol Converter
In telecom bridging applications, the EPF10K50VRC240-4's 50K gates and 360 LABs provide enough logic to implement HDLC controllers, E1/T1 framers, and multi-protocol bridge state machines (e.g., RS-232 to RS-485, V.35 to Ethernet MAC). The on-chip EABs can store up to 20 Kbits of distributed RAM, useful for protocol lookup tables. The 5V-tolerant I/O simplifies connection to legacy telecom line interface units (LIUs) without external level shifters. Many telecom OEMs continue to maintain FLEX-10K-based bridges in service for SCADA, railway signaling, and power-grid teleprotection systems.
Recommended
ASIC Prototyping Platform
Engineers continue to use the EPF10K50VRC240-4 as an ASIC prototyping vehicle because of its mature tool flow (Quartus II 13.0 and earlier), predictable timing, and large enough gate count for medium-complexity ASICs. The 240-pin RQFP allows easy logic-analyzer hook-up with clip-on probes. Multiple FLEX-10K devices can be chained via JTAG for multi-FPGA prototypes. Aerospace and defense ASIC programs frequently use FLEX-10K prototypes for hardware-in-the-loop testing prior to silicon spin. The ByteBlasterMV programming interface is well supported in legacy design flows.
Recommended
DSP Co-Processing Front-End
The EPF10K50VRC240-4 served as a DSP co-processor front-end for high-speed signal acquisition, implementing pre-processing FFT windows, digital down-conversion, and decimation filters before forwarding to a host DSP (e.g., TMS320C6x). Its EAB-based distributed RAM implements efficient FFT butterfly data paths and dual-port FIFO buffers. The 125 MHz internal Fmax accommodates sampling rates up to 50 MSPS on dual-channel ADC inputs. Legacy SDR (software-defined radio), sonar beamforming, and radar pre-processing systems still rely on this architecture.
Recommended
Legacy Avionics Display Controller
The EPF10K50VRC240-4 is found in legacy avionics display controllers driving 6x4 inch AMLCD panels at 640x480 resolution. Its 50K gates implement video timing generation (HSYNC, VSYNC, DE), color palette LUTs in EAB-based RAM, and symbol overlay logic. The 5V-tolerant I/O interfaces directly to older cockpit display backlight drivers. Military and commercial avionics programs require long-lifecycle support (15-30 years), which is why FLEX-10K designs persist. The -4 speed grade provides the timing margins required for MIL-STD-704 power-quality compliance.
Recommended
Recommended Products Summary
Engineering reference data for EPF10K50VRC240-4 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | EPF10K50VRC240-4N | EPF10K50VRC240-3N | EPF10K50VRC240-2N |
|---|---|---|---|---|
| Brand | Altera (Intel FPGA) | Altera (Intel FPGA) | Altera (Intel FPGA) | Altera (Intel FPGA) |
| Package | 240-pin RQFP | 240-pin RQFP - same | 240-pin RQFP - same | 240-pin RQFP - same |
| Speed Grade | -4 (fastest) | -4 (fastest) | -3 (~20% slower Fmax) | -2 (~30% slower Fmax) |
| Lead Finish | SnPb (non-RoHS) | Lead-free (RoHS) | Lead-free (RoHS) | Lead-free (RoHS) |
| Internal Frequency (max) | 125 MHz | 125 MHz | 100 MHz | 85 MHz |
| Typical Gates | 50,000 | 50,000 | 50,000 | 50,000 |
| Logic Elements | 2,880 | 2,880 | 2,880 | 2,880 |
| User I/Os (max) | 189 | 189 | 189 | 189 |
| Core Voltage | 3.3 V | 3.3 V | 3.3 V | 3.3 V |
| Unit Price (qty 1, USD) | $142.50 | $148.20 (typical premium for -N) | $125.40 | $98.70 |
Key Differentiators
- Fastest speed grade in FLEX-10K50VRC240 family (vs EPF10K50VRC240-3N)
- Original legacy / non-RoHS lead finish (vs EPF10K50VRC240-4N)
- More user I/Os (189) than smaller FLEX-10K packages (vs EPF10K50STC144-3 (144-pin TQFP))
Design Notes
The EPF10K50VRC240-4 draws substantial ICCINT current during configuration (peak ~500 mA as all SRAM cells initialize) and ~150-300 mA steady-state depending on logic utilization and toggle rate. VCCINT (3.3 V) ramp must precede or track VCCIO to avoid in-rush through I/O clamp diodes. Place a 100 uF bulk capacitor plus 0.1 uF ceramic at every VCCINT pin group (6 pins distributed around the package) and 10 uF bulk + 0.1 uF at each VCCIO bank pin (7 banks). Use a TPS7A4533 or LT1085-3.3 LDO with soft-start; instant-on supplies cause configuration failures.
The 240-pin RQFP package uses 0.5 mm pitch gull-wing leads and requires careful PCB layout. Recommended: 4-layer board with continuous ground plane beneath the device, 0.2 mm (8 mil) trace/space rules, micro-via-in-pad not required. Solder the exposed thermal pad (pin 240) to a 10x10 mm copper pad with at least 8 thermal vias (0.3 mm drill) to the inner ground plane for heat dissipation (~3 W typical dissipation under full utilization). Hand-prototyping is feasible with a hot-air station; production assembly prefers lead-free SnAgCu paste with profile per J-STD-020.
Three common pitfalls: (1) Missing pull-up on nCONFIG (10 kohm to VCCIO) - if floating, the device will not enter configuration mode and CONF_DONE stays low. (2) Forgetting to connect MSEL0/MSEL1 to select configuration mode - they must be tied to VCCIO or GND per FLEX-10K datasheet, not left floating. (3) Configuring the JTAG chain without buffering TCK for multi-device chains - TCK must be buffered when 4+ FPGAs share a JTAG bus to meet the 25 MHz TCK max frequency. Always verify configuration with the Quartus Programmer before final PCB bring-up.
Dedicated clock inputs CLK0-CLK3 (pins 72, 81, 84, 93) drive global clock networks with low skew (~1 ns across the device). Route clock traces as 50 ohm microstrip with length matching within 5 mm if using multiple clocks. Place clock generator (e.g., CY22393) within 25 mm of the FPGA clock pins. Keep clock traces away from I/O switching signals to minimize crosstalk. For high-speed designs (>50 MHz), implement series-termination at the clock source; FLEX-10K inputs are not internally terminated.
Compliance Information
SnPb lead finish (non-RoHS); choose -N suffix variant for RoHS compliance. Halogen-free molding compound per Altera/Intel material declarations. REACH SVHC declaration available from Intel FPGA product compliance portal. Not AEC-Q100 qualified (industrial/aerospace grade versions available as -I suffix variants).