EPF10K20TC144-3 - FLEX 10K FPGA 20K Gates 144-TQFP | Intel
MPN: EPF10K20TC144-3 ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $38.5 | $38.50 |
| 10 | $34.2 | $342.00 |
| 100 | $28.9 | $2,890.00 |
| 500 | $24.4 | $12,200.00 |
| 1,000 | $21.1 | $21,100.00 |
EPF10K20TC144-3 Overview
An FPGA (Field Programmable Gate Array) is a programmable logic device that allows engineers to define custom digital circuits after PCB fabrication. FPGAs sit in the programmable logic hierarchy between simple PLDs and high-end ASICs, offering a balance of density, I/O flexibility, and non-recurring engineering cost. The FLEX 10K series was among the first to embed dedicated RAM blocks (EABs), enabling single-chip implementation of registers, FIFOs, and small memory subsystems.
Key features include 102 user I/O pins, 144 logic array blocks, 12 embedded array blocks totaling 24,576 RAM bits, and a maximum internal operating frequency around 125 MHz. The part supports in-system programmability through a serial configuration interface, allowing field firmware updates without removing the device from the board. The TQFP-144 package offers a 1.0 mm lead pitch suitable for multilayer PCBs and standard SMT assembly lines.
Typical applications include legacy telecom and industrial controllers, PCI and ISA bus bridges, glue-logic replacement for discrete TTL, custom peripheral interfaces for embedded microprocessors, and prototyping platforms for ASIC emulation. The wide 5 V tolerance and abundant I/O count make it well suited to industrial backplane designs where 3.3 V parts are not desired.
When designing with this part, note that the FLEX 10K family uses 5 V VCCIO and VCCINT, and the configuration EEPROM must be a compatible EPC1 or EPC2 device. Designers should also confirm that the chosen speed grade (-3) meets the target fMAX for critical paths; faster -4 speed grades are available within the same package for timing closure.
This page synthesizes distributor stock levels, drop-in alternatives within the FLEX 10K family, and practical design notes not consolidated in the original manufacturer datasheet.
Drop-in alternatives for EPF10K20TC144-3 — 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 EPF10K20TC144-3 (same form factor and footprint) — differing in Package, Operating Temperature, Configuration Method, Mounting Type, Process Technology.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
EPF10K20TC144-4
✅ Drop-In✓ In Stock
$18.95 / Unit
View Datasheet →EPF10K20TC144-3N
✅ Drop-In✓ In Stock
$20.85 / Unit
View Datasheet →EPF10K20TC144-4N
✅ Drop-In✓ In Stock
$52 / Unit
View Datasheet →EPF10K20TC144
✅ Drop-In✓ In Stock
$20.75 / Unit
View Datasheet →EPF10K20TC144-3 Maximum Ratings & Electrical Characteristics
| Family | FLEX 10K |
| Logic Elements / Cells | 1,152 |
| Total RAM Bits | 24,576 |
| Number of Logic Array Blocks (LABs) | 144 |
| Number of Embedded Array Blocks (EABs) | 12 |
| Number of User I/O | 102 |
| Number of Gates | 20,000 |
| Maximum Operating Frequency | 125 MHz |
| Propagation Delay | 0.4 ns |
| Supply Voltage | 5 V |
| Process Technology | 0.42 um CMOS |
| Operating Temperature | 0 C to 70 C (Commercial) |
| Package | 144-LQFP (TQFP) 22x22 mm |
| Mounting Type | Surface Mount (Gull Wing) |
| Configuration Method | SRAM-based, serial configuration interface |
| Lead Pitch | 0.5 mm |
EPF10K20TC144-3 144-lqfp (tqfp) 22x22 mm Pin Configuration Guide
Pin configuration for EPF10K20TC144-3 (144-lqfp (tqfp) 22x22 mm package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for EPF10K20TC144-3.
Refer to the datasheet for full pin configuration.
Typical Applications
EPF10K20TC144-3 is suitable for 6 applications: Legacy Industrial Controller Backplane, PCI/ISA Bus Bridge Glue Logic, ASIC Emulation and Prototyping Platform, Custom Peripheral Interface for Embedded MCUs, Telecommunications Line Card Glue Logic, Test and Measurement Instrumentation Front-End.
Legacy Industrial Controller Backplane
The EPF10K20TC144-3 fits legacy industrial backplane designs because its 102 user I/O, 5 V VCCIO, and LVTTL-compatible I/O standards match the 5 V TTL signaling used on ISA, PC/104, and VME bus peripherals. The 1,152 logic elements handle glue logic such as address decoding, wait-state generation, and interrupt controllers, while the 12 EABs (24,576 RAM bits) implement dual-port register buffers between the backplane and the local CPU. Engineers migrating older 5 V systems should preserve the 144-LQFP footprint and retain the existing EPC2 configuration EEPROM, since the 5 V core supply avoids level shifters that a 3.3 V Cyclone replacement would require.
Recommended
PCI/ISA Bus Bridge Glue Logic
The EPF10K20TC144-3 was widely adopted as a PCI or ISA bus bridge glue-logic device in the late 1990s and early 2000s, and remains in service in long-lifecycle embedded systems. Its 102 user I/O are sufficient for 32-bit PCI address/data multiplexing, command decoding, and parity generation, while the 0.4 ns propagation delay (-3 speed grade) supports 33 MHz PCI timing. The 24,576 bits of EAB RAM implement small FIFO buffers between the PCI bus and the local peripheral. For new PCI designs, engineers should note that the part is obsolete and consider the FLEX 10KE or Cyclone series as modern replacements, but for maintaining field-deployed equipment the EPF10K20TC144-3 remains a validated choice.
Recommended
ASIC Emulation and Prototyping Platform
The EPF10K20TC144-3 is commonly used for ASIC emulation and pre-silicon prototyping because its 20,000-gate capacity, 12 EABs, and 102 user I/O allow designers to model mid-complexity ASICs before committing to mask production. Per the FLEX 10K datasheet, the device supports rapid design iteration through the Quartus II or Max+Plus II toolchains, with timing-accurate simulation back-annotated to the 0.4 ns propagation delay. The 144-LQFP package is breadboard-friendly with standard 0.5 mm pitch and is compatible with adapter boards that convert to PGA or BGA footprints used by larger FLEX 10K members. For larger emulation tasks, designers can chain multiple EPF10K20TC144-3 devices using the JTAG serial configuration chain.
Recommended
Custom Peripheral Interface for Embedded MCUs
The EPF10K20TC144-3 pairs naturally with embedded microprocessors as a programmable peripheral interface, offloading tasks such as PWM generation, quadrature decoder, or custom serial protocols that the MCU cannot handle in software. Its 102 user I/O provide ample headroom for connecting to MCU GPIO buses, memory-mapped peripheral registers, and external sensors. The 5 V tolerance simplifies interfacing with industrial-grade MCUs that operate at 5 V, eliminating level shifters. The EAB blocks implement lookup tables for encoder calibration or waveform synthesis, offloading real-time computation from the MCU firmware. Engineers should retain the EPC2 configuration EEPROM to allow field firmware updates via JTAG.
Recommended
Telecommunications Line Card Glue Logic
In legacy telecom line cards (T1/E1, ISDN, and early DSLAM equipment), the EPF10K20TC144-3 served as the central glue logic between framer ICs, TDM switching fabrics, and host processors. Its 102 user I/O accommodate multiple framer connections plus the HDLC controller interface, while the 125 MHz maximum internal frequency handles TDM bus multiplexing at standard backplane rates. The 5 V supply tolerance matches legacy telecom power rails (typically 5 V or 3.3 V with level shifters). For long-lifecycle telecom equipment requiring hardware continuity through 2026 and beyond, the EPF10K20TC144-3 remains a supported part via distribution stock and aftermarket channels, though new designs should consider Cyclone IV GX or Lattice ECP5.
Recommended
Test and Measurement Instrumentation Front-End
The EPF10K20TC144-3 is suitable as a programmable front-end controller for bench-top test and measurement instruments, where its 102 user I/O connect to ADC/DAC channels, range relays, and display drivers. The 12 EABs (24,576 RAM bits) implement calibration lookup tables and waveform storage for arbitrary waveform generators. The 0.4 ns propagation delay supports 100 MHz digital pattern generation, sufficient for legacy logic analyzer and protocol tester applications. Engineers designing replacement front-ends for legacy instruments should preserve the 144-LQFP footprint to reuse the existing PCB, and qualify the EPF10K20TC144-4N drop-in alternative for tighter timing margins.
Recommended
Recommended Products Summary
Engineering reference data for EPF10K20TC144-3 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | EPF10K20TC144-4 | EPF10K20TC144-3N | EPF10K20TC144-4N | EPF10K20TC144 |
|---|---|---|---|---|---|
| Brand | Intel (formerly Altera) | Intel (formerly Altera) | Intel (formerly Altera) | Intel (formerly Altera) | Intel (formerly Altera) |
| Package | 144-LQFP (TQFP) | 144-LQFP (TQFP) - same | 144-LQFP (TQFP) - same | 144-LQFP (TQFP) - same | 144-LQFP (TQFP) - same |
| Speed Grade | -3 (0.4 ns propagation delay, 125 MHz fMAX) | -4 (faster) | -3 (same) | -4 (faster) | default (unspecified) |
| Lead-Free (N suffix) | No | No | Yes | Yes | No |
| Logic Elements | 1,152 | 1,152 | 1,152 | 1,152 | 1,152 |
| User I/O | 102 | 102 | 102 | 102 | 102 |
| Supply Voltage | 5 V | 5 V | 5 V | 5 V | 5 V |
| Operating Temperature | 0 C to 70 C (Commercial) | 0 C to 70 C | 0 C to 70 C | 0 C to 70 C | 0 C to 70 C |
| Embedded RAM (EAB bits) | 24,576 | 24,576 | 24,576 | 24,576 | 24,576 |
Key Differentiators
- Faster speed grade option in same package (vs EPF10K20TC144-4)
- Lead-free finish option in same package (vs EPF10K20TC144-3N)
- More user I/O with same logic capacity (vs EPF10K20RC208-4)
Design Notes
The EPF10K20TC144-3 requires a stable 5 V supply on VCCINT (core) and VCCIO (I/O). Per the FLEX 10K datasheet, VCCINT and VCCIO should be decoupled with 0.1 uF ceramic capacitors placed as close as possible to each power pin, plus a single 10 uF tantalum or aluminum bulk capacitor near the device. Power-on ramp should be monotonic to avoid configuration latch-up; if the supply can droop or glitch during FPGA configuration, add a supervisory reset to nCONFIG to force reconfiguration.
The 144-LQFP package has a 0.5 mm lead pitch and a 22x22 mm body. Recommended land pattern follows IPC-7351 nominal density with a 0.30 mm pad width and 1.50 mm pad length. Use 4-layer PCB with a continuous ground plane beneath the device to provide thermal dissipation and controlled impedance for high-speed I/O. Keep all configuration traces (DCLK, DATA0, nCONFIG, nSTATUS, CONF_DONE) under 50 mm and route them away from switching signals to avoid configuration errors.
Estimated: at 125 MHz internal operation with all 102 I/O switching at 25 MHz LVTTL, ICCINT draw reaches approximately 150-200 mA. Designers using the EPF10K20TC144-3 in dense, fully-loaded designs should verify thermal dissipation: with theta_JA of approximately 35 C/W for 144-LQFP, junction temperature rise is 5-7 C above ambient, well within the 70 C commercial limit. For industrial -40 C to 85 C designs, switch to the EPF10K20TI144-3 variant instead. Never substitute a FLEX 10KE (EPF10K20E) part, since the 2.5 V core is incompatible with 5 V designs.
Compliance Information
EPF10K20TC144-3 (without N suffix) uses SnPb (tin-lead) finish and is not RoHS compliant. For RoHS-compliant drop-in alternatives, use EPF10K20TC144-3N or EPF10K20TC144-4N. RoHS and REACH compliance status was not explicitly stated in the verified web data and is marked unknown for this base part.
