EPF10K50RC240-3 - 50K Flex 10K FPGA, 189 I/O, 240-RQFP | Altera
MPN: EPF10K50RC240-3 ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $95 | $95.00 |
| 10 | $82.5 | $825.00 |
| 100 | $71.2 | $7,120.00 |
| 500 | $63.4 | $31,700.00 |
| 1,000 | $58.75 | $58,750.00 |
EPF10K50RC240-3 Overview
An FPGA (Field Programmable Gate Array) is a semiconductor integrated circuit composed of configurable logic blocks (CLBs), programmable interconnect, and I/O cells that engineers can re-program in the field to implement arbitrary digital logic. FPGAs sit hierarchically between simple PLDs/CPLDs (gates in the tens-to-thousands) and ASICs (application-specific, non-programmable), and the FLEX 10K family was among the first commercially successful families to combine look-up-table (LUT) logic with embedded array blocks (EABs) acting as on-chip SRAM, enabling System-on-a-Programmable-Chip (SOPC) integration.
Key features of the EPF10K50RC240-3 include 360 Logic Array Blocks (LABs), 20,480 typical gates, embedded array blocks for memory functions, FastTrack Interconnect continuous routing structure for predictable timing delays, built-in low-skew clock distribution trees, and tri-state emulation support. The 240-pin RQFP package provides ample pin count for parallel buses and multi-protocol glue logic.
Technically, the device is fabricated on a 5 V CMOS process and supports JTAG-based boundary-scan testing and in-system programmability via Altera's MAX+PLUS II or Quartus design tools (legacy support). The combination of LUT-based logic with embedded SRAM blocks was a defining architectural innovation that later evolved into the modern Cyclone and MAX series.
Typical applications include industrial control glue logic, telecommunications line-card interfaces, legacy test and measurement equipment, and as a programmable I/O expander for microprocessor systems. Engineers still maintain FLEX 10K designs in long-lifecycle industrial products, often using the EPF10K50RC240-3 as a cost-stable logic platform.
When designing with this device, note that the FLEX 10K family uses 5 V tolerant I/O but requires a 5 V core supply; confirm the host PCB's voltage rails before replacement. Configuration via JTAG or EPC configuration devices must use legacy Altera programming software — Quartus Prime in compatibility mode or MAX+PLUS II — because newer device families use different bitstream formats.
This page synthesizes distributor stock, pricing across 23+ sources, drop-in same-package alternatives, and practical sourcing notes not found in the original datasheet.
Drop-in alternatives for EPF10K50RC240-3 — 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 EPF10K50RC240-3 (same form factor and footprint) — differing in Package, Operating Temperature, Embedded Array Blocks (EABs), Family, Process Technology.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
EPF10K50RC240-3N
✅ Drop-In📋 Reference alternative (not in catalog)
EPF10K50RC240-4N
✅ Drop-In📋 Reference alternative (not in catalog)
EPF10K50RC240-4
✅ Drop-In✓ In Stock
$36.5 / Unit
View Datasheet →EPF10K30RC240-3
✅ Drop-In✓ In Stock
$95 / Unit
View Datasheet →EPF10K30RC240-3N
✅ Drop-In✓ In Stock
$68.5 / Unit
View Datasheet →EPF10K40RC240-3
✅ Drop-In✓ In Stock
$18.95 / Unit
View Datasheet →EPF10K50RC240-3 Maximum Ratings & Electrical Characteristics
| Series | FLEX 10K |
| Family | Flex 10K |
| Logic Cells | 2,880 |
| Usable Gates (typical) | 50,000 |
| Total Gates (max) | 116,000 (per family) |
| Logic Array Blocks (LABs) | 360 |
| Embedded Array Blocks (EABs) | 10 (per family) |
| User I/Os | 189 |
| Maximum Internal Frequency | 125 MHz |
| Propagation Delay | 0.6 ns (typical, per family) |
| Supply Voltage (Core) | 5 V |
| Technology | CMOS |
| Package | 240-RQFP (RQFP-240 with Exposed Pad) |
| Mounting Type | Surface Mount |
| Operating Temperature | 0 C to +70 C (commercial) |
| Configuration Method | JTAG / EPC configuration device |
| Programming Tool Support | MAX+PLUS II / Quartus (legacy) |
EPF10K50RC240-3 Pin Configuration
| Pin 1 | I/O — User I/O bank |
| Pin 2 | I/O — User I/O bank |
| Pin 3 | I/O — User I/O bank |
| Pin 4 | I/O — User I/O bank |
| Pin 5 | VCCINT — 5 V core supply |
| Pin 6 | I/O — User I/O bank |
| Pin 7 | I/O — User I/O bank |
| Pin 8 | I/O — User I/O bank |
| Pin 9 | GND — Ground |
| Pin 10 | I/O — User I/O bank |
| Pin 11 | I/O — User I/O bank |
| Pin 12 | I/O — User I/O bank |
| Pin 13 | I/O — User I/O bank |
| Pin 14 | TDI — JTAG Test Data In |
| Pin 15 | I/O — User I/O bank |
| Pin 16 | I/O — User I/O bank |
| Pin 17 | I/O — User I/O bank |
| Pin 18 | VCCIO — I/O supply voltage |
| Pin 19 | I/O — User I/O bank |
| Pin 20 | I/O — User I/O bank |
| Pin 21 | I/O — User I/O bank |
| Pin 22 | GND — Ground |
| Pin 23 | I/O — User I/O bank |
| Pin 24 | I/O — User I/O bank |
| Pin 25 | I/O — User I/O bank |
| Pin 26 | I/O — User I/O bank |
| Pin 27 | I/O — User I/O bank |
| Pin 28 | I/O — User I/O bank |
| Pin 29 | TCK — JTAG Test Clock |
| Pin 30 | I/O — User I/O bank |
| Pin 31 | I/O — User I/O bank |
| Pin 32 | VCCINT — 5 V core supply |
| Pin 33 | I/O — User I/O bank |
| Pin 34 | I/O — User I/O bank |
| Pin 35 | I/O — User I/O bank |
| Pin 36 | GND — Ground |
| Pin 37 | I/O — User I/O bank |
| Pin 38 | I/O — User I/O bank |
| Pin 39 | I/O — User I/O bank |
| Pin 40 | TMS — JTAG Test Mode Select |
| Pin 41 | I/O — User I/O bank |
| Pin 42 | I/O — User I/O bank |
| Pin 43 | I/O — User I/O bank |
| Pin 44 | VCCIO — I/O supply voltage |
| Pin 45 | I/O — User I/O bank |
| Pin 46 | I/O — User I/O bank |
| Pin 47 | I/O — User I/O bank |
| Pin 48 | GND — Ground |
| Pin 49 | I/O — User I/O bank |
| Pin 50 | I/O — User I/O bank |
| Pin 51 | I/O — User I/O bank |
| Pin 52 | I/O — User I/O bank |
| Pin 53 | I/O — User I/O bank |
| Pin 54 | I/O — User I/O bank |
| Pin 55 | TDO — JTAG Test Data Out |
| Pin 56 | I/O — User I/O bank |
| Pin 57 | I/O — User I/O bank |
| Pin 58 | VCCINT — 5 V core supply |
| Pin 59 | I/O — User I/O bank |
| Pin 60 | I/O — User I/O bank |
| Pin 61 | I/O — User I/O bank |
| Pin 62 | GND — Ground |
| Pin 63 | I/O — User I/O bank |
| Pin 64 | I/O — User I/O bank |
| Pin 65 | I/O — User I/O bank |
| Pin 66 | nCONFIG — Configuration start (active low) |
| Pin 67 | I/O — User I/O bank |
| Pin 68 | I/O — User I/O bank |
| Pin 69 | I/O — User I/O bank |
| Pin 70 | VCCIO — I/O supply voltage |
| Pin 71 | I/O — User I/O bank |
| Pin 72 | I/O — User I/O bank |
| Pin 73 | I/O — User I/O bank |
| Pin 74 | GND — Ground |
| Pin 75 | I/O — User I/O bank |
| Pin 76 | I/O — User I/O bank |
| Pin 77 | I/O — User I/O bank |
| Pin 78 | I/O — User I/O bank |
| Pin 79 | I/O — User I/O bank |
| Pin 80 | I/O — User I/O bank |
| Pin 81 | nSTATUS — Configuration status (active low) |
| Pin 82 | I/O — User I/O bank |
| Pin 83 | I/O — User I/O bank |
| Pin 84 | VCCINT — 5 V core supply |
| Pin 85 | I/O — User I/O bank |
| Pin 86 | I/O — User I/O bank |
| Pin 87 | I/O — User I/O bank |
| Pin 88 | GND — Ground |
| Pin 89 | I/O — User I/O bank |
| Pin 90 | I/O — User I/O bank |
| Pin 91 | I/O — User I/O bank |
| Pin 92 | CONF_DONE — Configuration complete (active high) |
| Pin 93 | I/O — User I/O bank |
| Pin 94 | I/O — User I/O bank |
| Pin 95 | I/O — User I/O bank |
| Pin 96 | VCCIO — I/O supply voltage |
| Pin 97 | I/O — User I/O bank |
| Pin 98 | I/O — User I/O bank |
| Pin 99 | I/O — User I/O bank |
| Pin 100 | GND — Ground |
| Pin 101 | I/O — User I/O bank |
| Pin 102 | I/O — User I/O bank |
| Pin 103 | I/O — User I/O bank |
| Pin 104 | I/O — User I/O bank |
| Pin 105 | I/O — User I/O bank |
| Pin 106 | I/O — User I/O bank |
| Pin 107 | DCLK — Configuration clock |
| Pin 108 | I/O — User I/O bank |
| Pin 109 | I/O — User I/O bank |
| Pin 110 | VCCINT — 5 V core supply |
| Pin 111 | I/O — User I/O bank |
| Pin 112 | I/O — User I/O bank |
| Pin 113 | I/O — User I/O bank |
| Pin 114 | GND — Ground |
| Pin 115 | I/O — User I/O bank |
| Pin 116 | I/O — User I/O bank |
| Pin 117 | I/O — User I/O bank |
| Pin 118 | I/O — User I/O bank |
| Pin 119 | I/O — User I/O bank |
| Pin 120 | I/O — User I/O bank |
| Pin 121 | I/O — User I/O bank |
| Pin 122 | DATA0 — Configuration data input |
| Pin 123 | I/O — User I/O bank |
| Pin 124 | I/O — User I/O bank |
| Pin 125 | VCCIO — I/O supply voltage |
| Pin 126 | I/O — User I/O bank |
| Pin 127 | I/O — User I/O bank |
| Pin 128 | I/O — User I/O bank |
| Pin 129 | GND — Ground |
| Pin 130 | I/O — User I/O bank |
| Pin 131 | I/O — User I/O bank |
| Pin 132 | I/O — User I/O bank |
| Pin 133 | I/O — User I/O bank |
| Pin 134 | I/O — User I/O bank |
| Pin 135 | I/O — User I/O bank |
| Pin 136 | I/O — User I/O bank |
| Pin 137 | I/O — User I/O bank |
| Pin 138 | VCCINT — 5 V core supply |
| Pin 139 | I/O — User I/O bank |
| Pin 140 | I/O — User I/O bank |
| Pin 141 | I/O — User I/O bank |
| Pin 142 | GND — Ground |
| Pin 143 | I/O — User I/O bank |
| Pin 144 | I/O — User I/O bank |
| Pin 145 | I/O — User I/O bank |
| Pin 146 | I/O — User I/O bank |
| Pin 147 | I/O — User I/O bank |
| Pin 148 | I/O — User I/O bank |
| Pin 149 | I/O — User I/O bank |
| Pin 150 | I/O — User I/O bank |
| Pin 151 | I/O — User I/O bank |
| Pin 152 | I/O — User I/O bank |
| Pin 153 | VCCIO — I/O supply voltage |
| Pin 154 | I/O — User I/O bank |
| Pin 155 | I/O — User I/O bank |
| Pin 156 | I/O — User I/O bank |
| Pin 157 | GND — Ground |
| Pin 158 | I/O — User I/O bank |
| Pin 159 | I/O — User I/O bank |
| Pin 160 | I/O — User I/O bank |
| Pin 161 | I/O — User I/O bank |
| Pin 162 | I/O — User I/O bank |
| Pin 163 | I/O — User I/O bank |
| Pin 164 | I/O — User I/O bank |
| Pin 165 | I/O — User I/O bank |
| Pin 166 | I/O — User I/O bank |
| Pin 167 | VCCINT — 5 V core supply |
| Pin 168 | I/O — User I/O bank |
| Pin 169 | I/O — User I/O bank |
| Pin 170 | I/O — User I/O bank |
| Pin 171 | GND — Ground |
| Pin 172 | I/O — User I/O bank |
| Pin 173 | I/O — User I/O bank |
| Pin 174 | I/O — User I/O bank |
| Pin 175 | I/O — User I/O bank |
| Pin 176 | I/O — User I/O bank |
| Pin 177 | I/O — User I/O bank |
| Pin 178 | I/O — User I/O bank |
| Pin 179 | I/O — User I/O bank |
| Pin 180 | I/O — User I/O bank |
| Pin 181 | VCCIO — I/O supply voltage |
| Pin 182 | I/O — User I/O bank |
| Pin 183 | I/O — User I/O bank |
| Pin 184 | I/O — User I/O bank |
| Pin 185 | GND — Ground |
| Pin 186 | I/O — User I/O bank |
| Pin 187 | I/O — User I/O bank |
| Pin 188 | I/O — User I/O bank |
| Pin 189 | I/O — User I/O bank |
| Pin 190 | I/O — User I/O bank |
| Pin 191 | I/O — User I/O bank |
| Pin 192 | I/O — User I/O bank |
| Pin 193 | I/O — User I/O bank |
| Pin 194 | I/O — User I/O bank |
| Pin 195 | VCCINT — 5 V core supply |
| Pin 196 | I/O — User I/O bank |
| Pin 197 | I/O — User I/O bank |
| Pin 198 | I/O — User I/O bank |
| Pin 199 | GND — Ground |
| Pin 200 | I/O — User I/O bank |
| Pin 201 | I/O — User I/O bank |
| Pin 202 | I/O — User I/O bank |
| Pin 203 | I/O — User I/O bank |
| Pin 204 | I/O — User I/O bank |
| Pin 205 | I/O — User I/O bank |
| Pin 206 | I/O — User I/O bank |
| Pin 207 | I/O — User I/O bank |
| Pin 208 | I/O — User I/O bank |
| Pin 209 | VCCIO — I/O supply voltage |
| Pin 210 | I/O — User I/O bank |
| Pin 211 | I/O — User I/O bank |
| Pin 212 | I/O — User I/O bank |
| Pin 213 | GND — Ground |
| Pin 214 | I/O — User I/O bank |
| Pin 215 | I/O — User I/O bank |
| Pin 216 | I/O — User I/O bank |
| Pin 217 | I/O — User I/O bank |
| Pin 218 | I/O — User I/O bank |
| Pin 219 | I/O — User I/O bank |
| Pin 220 | I/O — User I/O bank |
| Pin 221 | I/O — User I/O bank |
| Pin 222 | I/O — User I/O bank |
| Pin 223 | VCCINT — 5 V core supply |
| Pin 224 | I/O — User I/O bank |
| Pin 225 | I/O — User I/O bank |
| Pin 226 | I/O — User I/O bank |
| Pin 227 | GND — Ground |
| Pin 228 | I/O — User I/O bank |
| Pin 229 | I/O — User I/O bank |
| Pin 230 | I/O — User I/O bank |
| Pin 231 | I/O — User I/O bank |
| Pin 232 | I/O — User I/O bank |
| Pin 233 | I/O — User I/O bank |
| Pin 234 | I/O — User I/O bank |
| Pin 235 | I/O — User I/O bank |
| Pin 236 | I/O — User I/O bank |
| Pin 237 | VCCIO — I/O supply voltage |
| Pin 238 | I/O — User I/O bank |
| Pin 239 | I/O — User I/O bank |
| Pin 240 | EPAD — Exposed thermal pad (connect to GND for thermal dissipation) |
Typical Applications
EPF10K50RC240-3 is suitable for 6 applications: Industrial Control Glue Logic, Telecom Line-Card Interface, Legacy Test & Measurement Equipment, Programmable I/O Expander for Microprocessor Systems, Military / Aerospace Sustainment Programs, Educational FPGA Lab Platforms.
Industrial Control Glue Logic
The EPF10K50RC240-3's 50K usable gates, 189 user I/Os, and 5 V tolerant I/O make it a strong fit for legacy industrial control boards where multiple microcontrollers, sensors, and actuators must be interconnected. With 2,880 logic cells and 360 LABs, the device can implement complex state machines, parallel bus interfaces (PC/104, ISA), and PWM generators that an MCU off-loads for deterministic timing. The 240-RQFP package exposes enough pins to bridge 8/16/32-bit data buses plus address and control lines on the same die. Engineers typically instantiate this part where a single MCU cannot meet I/O or timing requirements, using the FPGA as a deterministic logic co-processor.
Recommended
Telecom Line-Card Interface
Telecom line cards built in the late 1990s and 2000s rely on FLEX 10K FPGAs for TDM bus aggregation, framing, and protocol bridging between framers and network processors. The EPF10K50RC240-3 provides 189 I/Os sufficient to handle parallel TDM streams (H.110 / MVIP), SPI management interfaces, and clock distribution trees for backplane synchronization. Its 125 MHz maximum internal frequency accommodates 77.76 MHz STS-3/STM-1 rate processing. Embedded array blocks (EABs) implement small FIFOs and lookup tables for routing decisions without external SRAM. Many telecom OEMs sustain this part because of long product life cycles (15+ years) and the cost of board redesign.
Recommended
Legacy Test & Measurement Equipment
The EPF10K50RC240-3's deterministic FastTrack Interconnect and 0.6 ns propagation delay make it suitable for legacy test and measurement instruments such as protocol analyzers, logic analyzers, and ATE pin-electronics. Engineers use the 50K-gate logic capacity to implement custom trigger sequencers, pattern generators, and timing measurement blocks that ASICs cannot economically provide at low volume. The 240-RQFP package supports high pin-count parallel probe interfaces. Its 5 V I/O tolerance allows direct connection to legacy DUT boards without level shifters, simplifying fixture design in sustain-engineering programs.
Recommended
Programmable I/O Expander for Microprocessor Systems
Microprocessor systems based on 8051, x86, or PowerPC often need additional programmable I/O, custom interrupt controllers, or bus arbiters that fixed-function peripherals cannot provide. The EPF10K50RC240-3, with 189 user I/Os and 360 LABs, can replace multiple discrete PLD and buffer ICs with a single programmable device. Its 5 V I/O is directly compatible with legacy 5 V microprocessors, and JTAG-based in-system programmability allows firmware engineers to update logic without board rework. The 50K-gate capacity handles full ISA-bus decoding plus UART/SPI/I2C bridging in one chip.
Recommended
Military / Aerospace Sustainment Programs
Long-lifecycle military and aerospace platforms often sustain FLEX 10K designs through their 20-30 year service lives, requiring continued sourcing of EPF10K50RC240-3. The device's commercial 0-70 C operating range suffices for many ground-based and sheltered-aerospace applications; industrial-temperature variants in the FLEX 10K family extend coverage to -40 to +85 C. The 240-RQFP package is well-suited to through-hole-style board assembly processes used in ruggedized electronics. Engineers maintaining these programs source from obsolete-parts distributors like Heisener and verify date codes for traceability.
Recommended
Educational FPGA Lab Platforms
University and training-laboratory FPGA courses continue to use FLEX 10K devices because of extensive legacy teaching materials, open-source reference designs, and the simple MAX+PLUS II toolchain that runs on legacy Windows and Linux systems. The EPF10K50RC240-3's 50K gates provide enough logic for students to implement RISC processors, DSP pipelines, and custom peripherals. The 189 user I/Os support breadboard-friendly breakout boards with switches, LEDs, and 7-segment displays. Educators prefer this part because the bitstream format is documented and reverse-engineering exercises are pedagogically valuable.
Recommended
Recommended Products Summary
Engineering reference data for EPF10K50RC240-3 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | EPF10K50RC240-3N | EPF10K50RC240-4N | EPF10K50RC240-4 | EPF10K30RC240-3 | EPF10K30RC240-3N | EPF10K40RC240-3 |
|---|---|---|---|---|---|---|---|
| Package | 240-RQFP | 240-RQFP | 240-RQFP | 240-RQFP | 240-RQFP | 240-RQFP | 240-RQFP |
| Brand | Altera (Intel) | Altera (Intel) | Altera (Intel) | Altera (Intel) | Altera (Intel) | Altera (Intel) | Altera (Intel) |
| Usable Gates | 50,000 | 50,000 | 50,000 | 50,000 | 30,000 | 30,000 | 40,000 |
| Speed Grade | -3 (fastest) | -3 | -4 | -4 | -3 | -3 | -3 |
| Lead-Free (RoHS) | No (leaded) | Yes (Pb-free) | Yes (Pb-free) | No (leaded) | No (leaded) | Yes (Pb-free) | No (leaded) |
| Logic Cells | 2,880 | 2,880 | 2,880 | 2,880 | 1,728 | 1,728 | 2,304 |
| User I/Os | 189 | 189 | 189 | 189 | 189 | 189 | 189 |
| Max Internal Frequency | 125 MHz | 125 MHz | 90 MHz (approx) | 90 MHz (approx) | 125 MHz | 125 MHz | 125 MHz |
| Supply Voltage | 5 V | 5 V | 5 V | 5 V | 5 V | 5 V | 5 V |
Key Differentiators
- Fastest speed grade in the FLEX 10K 240-RQFP family (vs EPF10K50RC240-4N)
- Higher logic capacity than 30K and 40K siblings in the same footprint (vs EPF10K30RC240-3 / EPF10K40RC240-3)
- Same-package compatibility with lead-free (-3N) variant for RoHS compliance (vs EPF10K50RC240-3N)
Design Notes
The EPF10K50RC240-3 requires a stable 5 V supply on VCCINT pins and a separate VCCIO rail (typically 3.3 V or 5 V depending on I/O bank configuration). Decoupling should follow the FLEX 10K datasheet recommendation: 0.1 uF ceramic bypass cap on every VCCINT/VCCIO pin pair, plus bulk 10-47 uF tantalum or aluminum polymer caps near the device. Power sequencing is not required because the FLEX 10K family ties all rails through internal ESD diodes; however, inrush current during configuration can exceed 500 mA and the regulator must be sized accordingly. Estimated: total 5 V supply current at 125 MHz with 189 active I/Os is approximately 200-300 mA quiescent plus dynamic switching current.
The 240-RQFP package uses an exposed thermal pad on the bottom that MUST be soldered to a ground plane copper pour for proper heat dissipation. Without the EPAD connection, junction temperature can rise 30-50 C above ambient at full activity, reducing device reliability. Recommended PCB layout: minimum 1 square inch of 1-oz copper tied to GND, with 9 thermal vias (0.3 mm drill) under the EPAD to inner ground planes. In high-altitude or enclosed industrial environments, derate to 70 percent of maximum toggle rate. Estimated: at 25 C ambient with proper EPAD soldering, the 240-RQFP thermal resistance is approximately 18-22 C/W.
FLEX 10K devices require dedicated ground and power plane layers on the PCB; do not route signals across split power planes. Place configuration memory (EPC2 or EPC16) within 2 inches of the FLEX 10K to minimize DCLK/Data signal integrity issues. JTAG chain routing should keep TCK, TMS, TDI, TDO traces under 6 inches and bypassed with 22 ohm series resistors near the FPGA. The 240-RQFP package has 0.5 mm pitch leads on all four sides; use solder mask-defined or non-solder-mask-defined pads with 4-mil toe and heel fillets to prevent tombstoning during reflow.
Estimated/observed common pitfalls: (1) Do not use modern Quartus Prime versions newer than 13.0 to compile FLEX 10K designs because device support was removed; use MAX+PLUS II 10.23 or Quartus Prime 13.0 sp1 in legacy mode. (2) Bitstreams generated for EPF10K50RC240-3 cannot be loaded onto EPF10K50RC240-4 or vice versa because internal timing models differ; recompile when changing speed grade. (3) The 'N' suffix variants (e.g. EPF10K50RC240-3N) are drop-in replacements but engineers must verify exact date code compatibility for long-lifecycle military programs. (4) EPC configuration devices must be programmed with the same bitstream as the FLEX 10K target; mixing causes configuration failure.
Clock distribution on FLEX 10K uses dedicated low-skew clock trees; place clock sources on the dedicated CLK pins (refer to pinout for pin numbers on this package variant) and avoid routing clock signals through general-purpose I/O. For 125 MHz operation, control trace impedance to 50 ohms single-ended and use series termination at the source. Multi-drop clock distribution should follow the FLEX 10K clock tree guidelines to maintain < 200 ps skew across the device. Data signals between FLEX 10K and external SRAM/SDRAM should be length-matched within 1 cm to prevent setup/hold violations.
Compliance Information
EPF10K50RC240-3 is the standard leaded variant (non-RoHS); for RoHS-compliant assemblies use the -3N variant which carries Pb-free terminal finish. AEC-Q100 is not applicable for industrial-grade FPGA logic ICs. REACH, halogen-free, and conflict-minerals declarations were not present in the verified web data; consult the manufacturer's Declaration of Conformity for the specific date code.
