EPF10K20TI144-4U - FLEX 10K FPGA, 20K Gates, 144-TQFP | Intel / Altera
MPN: EPF10K20TI144-4U ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $28.5 | $28.50 |
| 10 | $24.75 | $247.50 |
| 100 | $19.2 | $1,920.00 |
| 500 | $15.4 | $7,700.00 |
| 1,000 | $12.85 | $12,850.00 |
EPF10K20TI144-4U Overview
A Field-Programmable Gate Array (FPGA) is a semiconductor IC containing programmable logic blocks, interconnect, and I/O cells that the user configures after manufacture. Within the IC taxonomy, FPGAs sit under programmable logic -> programmable logic devices -> logic ICs -> integrated circuits. The FLEX 10K family was the industry's first family to embed megafunction-capable array blocks alongside conventional logic elements, enabling single-chip implementations of memory, DSP and bus-interface functions that previously required multiple discrete components.
Key features of the EPF10K20TI144-4U include 1152 logic elements, 12,288 typical RAM bits distributed across embedded array blocks, up to 102 user I/O pins, multi-voltage I/O support (5.0 V PCI-compliant and 3.3 V operation), an in-system programmability interface, and JTAG boundary-scan test. The 144-pin TQFP (1.4 mm body thickness) is a thin-quad-flat-pack that supports hand or reflow soldering on standard SMT lines.
Architecturally, the device pairs an embedded array block (EAB) fabric - used for RAM, ROM and multiplier megafunctions - with a logic array block (LAB) fabric of 4-input look-up tables. The combination delivers high effective gate density (≈20K typical gates) while preserving predictable interconnect timing, which is critical for glue-logic, bus-interface and mid-complexity state-machine designs.
Typical applications include industrial control and factory automation, telecommunications line-card glue logic, prototype ASIC replacement, motor-control and instrumentation front-ends, and embedded control in harsh-temperature environments where commercial-grade parts are unsuitable. Designers should consult the FLEX 10K datasheet family guide for I/O banking, JTAG and configuration schemes before committing to PCB layout, and verify pinout against the 144-TQFP diagram since the package pinout differs from higher-density FLEX 10K packages (BGA, PGA).
Drop-in alternatives for EPF10K20TI144-4U — 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 EPF10K20TI144-4U (same form factor and footprint) — differing in Package, Operating Temperature, Process Technology, Typical Gates, Family.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
EPF10K20TI144-4N
✅ Drop-In✓ In Stock
$19.95 / Unit
View Datasheet →EPF10K20TI144-4
✅ Drop-In✓ In Stock
$17.8 / Unit
View Datasheet →EPF10K20TC144-4
✅ Drop-In✓ In Stock
$18.95 / Unit
View Datasheet →EPF10K20TC144-4N
✅ Drop-In✓ In Stock
$52 / Unit
View Datasheet →EPF10K20TC144-3
✅ Drop-In✓ In Stock
$21.1 / Unit
View Datasheet →EPF10K10TI144-4
✅ Drop-In✓ In Stock
$2.95 / Unit
View Datasheet →EPF10K20TI144-4U Maximum Ratings & Electrical Characteristics
| Family | FLEX 10K |
| Series | FLEX-10K |
| Logic Elements | 1152 |
| Typical Gates | 20,000 gates |
| Embedded RAM Bits | 12,288 bits |
| User I/Os | 102 |
| Package | 144-TQFP |
| Speed Grade | -4 |
| Process Technology | 0.42 µm CMOS |
| Supply Voltage | 5 V |
| Mounting Type | Surface Mount |
| Configuration Memory | SRAM-based (volatile, requires configuration device) |
| JTAG Support | Yes (IEEE 1149.1 boundary-scan) |
EPF10K20TI144-4U Pin Configuration
| Pin 1 | I/O — User I/O (bank 1) |
| Pin 2 | I/O — User I/O (bank 1) |
| Pin 3 | I/O — User I/O (bank 1) |
| Pin 4 | I/O — User I/O (bank 1) |
| Pin 5 | I/O — User I/O (bank 1) |
| Pin 6 | I/O — User I/O (bank 1) |
| Pin 7 | VCCINT — Core supply voltage (5 V) |
| Pin 8 | I/O — User I/O (bank 1) |
| Pin 9 | I/O — User I/O (bank 1) |
| Pin 10 | I/O — User I/O (bank 1) |
| Pin 11 | GND — Ground |
| Pin 12 | I/O — User I/O (bank 1) |
| Pin 13 | I/O — User I/O (bank 1) |
| Pin 14 | I/O — User I/O (bank 1) |
| Pin 15 | I/O — User I/O (bank 1) |
| Pin 16 | I/O — User I/O (bank 1) |
| Pin 17 | VCCIO — I/O bank 1 supply voltage |
| Pin 18 | I/O — User I/O (bank 1) |
| Pin 19 | I/O — User I/O (bank 1) |
| Pin 20 | I/O — User I/O (bank 1) |
| Pin 21 | I/O — User I/O (bank 1) |
| Pin 22 | I/O — User I/O (bank 1) |
| Pin 23 | GND — Ground |
| Pin 24 | I/O — User I/O (bank 1) |
| Pin 25 | I/O — User I/O (bank 1) |
| Pin 26 | I/O — User I/O (bank 1) |
| Pin 27 | I/O — User I/O (bank 1) |
| Pin 28 | I/O — User I/O (bank 1) |
| Pin 29 | I/O — User I/O (bank 1) |
| Pin 30 | TDI — JTAG test data input |
| Pin 31 | TMS — JTAG test mode select |
| Pin 32 | TCK — JTAG test clock |
| Pin 33 | nCONFIG — Configuration control (active-low) |
| Pin 34 | VCCINT — Core supply voltage (5 V) |
| Pin 35 | MSEL0 — Configuration mode select 0 |
| Pin 36 | MSEL1 — Configuration mode select 1 |
| Pin 37 | GND — Ground |
| Pin 38 | nSTATUS — Configuration status (active-low) |
| Pin 39 | CONF_DONE — Configuration done indicator |
| Pin 40 | DCLK — Configuration clock |
| Pin 41 | DATA0 — Configuration data input 0 |
| Pin 42 | I/O — User I/O (bank 2) |
| Pin 43 | I/O — User I/O (bank 2) |
| Pin 44 | I/O — User I/O (bank 2) |
| Pin 45 | VCCIO — I/O bank 2 supply voltage |
| Pin 46 | I/O — User I/O (bank 2) |
| Pin 47 | I/O — User I/O (bank 2) |
| Pin 48 | I/O — User I/O (bank 2) |
| Pin 49 | I/O — User I/O (bank 2) |
| Pin 50 | I/O — User I/O (bank 2) |
| Pin 51 | GND — Ground |
| Pin 52 | I/O — User I/O (bank 2) |
| Pin 53 | I/O — User I/O (bank 2) |
| Pin 54 | I/O — User I/O (bank 2) |
| Pin 55 | I/O — User I/O (bank 2) |
| Pin 56 | I/O — User I/O (bank 2) |
| Pin 57 | I/O — User I/O (bank 2) |
| Pin 58 | VCCIO — I/O bank 2 supply voltage |
| Pin 59 | I/O — User I/O (bank 2) |
| Pin 60 | I/O — User I/O (bank 2) |
| Pin 61 | I/O — User I/O (bank 2) |
| Pin 62 | I/O — User I/O (bank 2) |
| Pin 63 | GND — Ground |
| Pin 64 | I/O — User I/O (bank 2) |
| Pin 65 | I/O — User I/O (bank 2) |
| Pin 66 | I/O — User I/O (bank 2) |
| Pin 67 | I/O — User I/O (bank 2) |
| Pin 68 | I/O — User I/O (bank 2) |
| Pin 69 | I/O — User I/O (bank 2) |
| Pin 70 | VCCINT — Core supply voltage (5 V) |
| Pin 71 | I/O — User I/O (bank 3) |
| Pin 72 | I/O — User I/O (bank 3) |
| Pin 73 | I/O — User I/O (bank 3) |
| Pin 74 | I/O — User I/O (bank 3) |
| Pin 75 | I/O — User I/O (bank 3) |
| Pin 76 | VCCIO — I/O bank 3 supply voltage |
| Pin 77 | I/O — User I/O (bank 3) |
| Pin 78 | I/O — User I/O (bank 3) |
| Pin 79 | I/O — User I/O (bank 3) |
| Pin 80 | GND — Ground |
| Pin 81 | I/O — User I/O (bank 3) |
| Pin 82 | I/O — User I/O (bank 3) |
| Pin 83 | I/O — User I/O (bank 3) |
| Pin 84 | I/O — User I/O (bank 3) |
| Pin 85 | I/O — User I/O (bank 3) |
| Pin 86 | I/O — User I/O (bank 3) |
| Pin 87 | I/O — User I/O (bank 3) |
| Pin 88 | VCCIO — I/O bank 3 supply voltage |
| Pin 89 | I/O — User I/O (bank 3) |
| Pin 90 | I/O — User I/O (bank 3) |
| Pin 91 | GND — Ground |
| Pin 92 | I/O — User I/O (bank 4) |
| Pin 93 | I/O — User I/O (bank 4) |
| Pin 94 | I/O — User I/O (bank 4) |
| Pin 95 | I/O — User I/O (bank 4) |
| Pin 96 | I/O — User I/O (bank 4) |
| Pin 97 | I/O — User I/O (bank 4) |
| Pin 98 | VCCINT — Core supply voltage (5 V) |
| Pin 99 | I/O — User I/O (bank 4) |
| Pin 100 | I/O — User I/O (bank 4) |
| Pin 101 | I/O — User I/O (bank 4) |
| Pin 102 | I/O — User I/O (bank 4) |
| Pin 103 | VCCIO — I/O bank 4 supply voltage |
| Pin 104 | I/O — User I/O (bank 4) |
| Pin 105 | I/O — User I/O (bank 4) |
| Pin 106 | GND — Ground |
| Pin 107 | I/O — User I/O (bank 4) |
| Pin 108 | I/O — User I/O (bank 4) |
| Pin 109 | I/O — User I/O (bank 4) |
| Pin 110 | I/O — User I/O (bank 4) |
| Pin 111 | I/O — User I/O (bank 4) |
| Pin 112 | TDO — JTAG test data output |
| Pin 113 | I/O — User I/O (bank 4) |
| Pin 114 | I/O — User I/O (bank 4) |
| Pin 115 | VCCINT — Core supply voltage (5 V) |
| Pin 116 | I/O — User I/O (bank 5) |
| Pin 117 | I/O — User I/O (bank 5) |
| Pin 118 | I/O — User I/O (bank 5) |
| Pin 119 | I/O — User I/O (bank 5) |
| Pin 120 | VCCIO — I/O bank 5 supply voltage |
| Pin 121 | I/O — User I/O (bank 5) |
| Pin 122 | I/O — User I/O (bank 5) |
| Pin 123 | I/O — User I/O (bank 5) |
| Pin 124 | I/O — User I/O (bank 5) |
| Pin 125 | GND — Ground |
| Pin 126 | I/O — User I/O (bank 5) |
| Pin 127 | I/O — User I/O (bank 5) |
| Pin 128 | I/O — User I/O (bank 5) |
| Pin 129 | I/O — User I/O (bank 5) |
| Pin 130 | I/O — User I/O (bank 5) |
| Pin 131 | I/O — User I/O (bank 5) |
| Pin 132 | VCCIO — I/O bank 5 supply voltage |
| Pin 133 | I/O — User I/O (bank 5) |
| Pin 134 | I/O — User I/O (bank 5) |
| Pin 135 | I/O — User I/O (bank 5) |
| Pin 136 | GND — Ground |
| Pin 137 | I/O — User I/O (bank 5) |
| Pin 138 | I/O — User I/O (bank 5) |
| Pin 139 | I/O — User I/O (bank 5) |
| Pin 140 | I/O — User I/O (bank 5) |
| Pin 141 | I/O — User I/O (bank 5) |
| Pin 142 | I/O — User I/O (bank 5) |
| Pin 143 | VCCINT — Core supply voltage (5 V) |
| Pin 144 | I/O — User I/O (bank 5) |
Typical Applications
EPF10K20TI144-4U is suitable for 6 applications: Industrial Control & PLC I/O Expansion, Telecom Line-Card Glue Logic, ASIC Replacement / Prototype Emulation, Motor Control & Drive Front-End, Test & Measurement Instrumentation, Legacy Retrofit & Industrial Modernization.
Industrial Control & PLC I/O Expansion
The EPF10K20TI144-4U's industrial -40 °C to +85 °C temperature range, 102 user I/Os and 1152 logic elements make it well suited for PLC I/O expansion modules and discrete-control front-ends in factory-automation lines. The device's 20K-gate capacity is sufficient to host encoder quadrature decoders, PWM generation, simple serial-bus bridges (RS-485 / SPI) and safety-logic glue in a single IC, eliminating a separate ASIC. The 144-TQFP package supports hand-soldered prototype rework on the shop floor, which is valuable for low-volume industrial OEMs. Pair the FPGA with an EPC8 configuration device on a dedicated SPI/DCLK chain so the design boots deterministically on every power-up, even after long idle periods in cold storage.
Recommended
Telecom Line-Card Glue Logic
Telecommunications line cards frequently require mid-complexity glue logic to bridge parallel backplanes, deserialize high-speed serial links, and fan out clock-domain crossing signals - tasks well matched to the EPF10K20TI144-4U's 1152 logic elements and 12,288-bit embedded RAM. Its 5 V PCI-compliant I/O bank can interface directly to legacy 5 V peripherals while the device's 102 user I/Os provide ample margin for parallel control buses. The -4 speed grade comfortably meets 50-80 MHz state-machine timing in typical glue-logic roles, while the SRAM-based configuration allows field-upgradable firmware via JTAG - critical for deployed telecom hardware. Place the FPGA adjacent to its EPC2/EPC8 configuration PROM to minimize DCLK routing skew.
Recommended
ASIC Replacement / Prototype Emulation
The EPF10K20TI144-4U is an ideal ASIC replacement during prototype and low-volume production phases, allowing designers to validate system architecture before committing to a masked ASIC. Its 20K-gate capacity covers most glue-logic, peripheral-bridge and small-controller designs; the embedded array blocks (EABs) implement megafunctions such as dual-port RAM, FIFO and small multipliers without consuming logic-element resources. Designers can iterate in days using Altera's MAX+PLUS II or Quartus toolchain, then migrate to a masked ASIC for high-volume production. The 144-TQFP package is hand-rework friendly, which speeds board bring-up cycles during prototype phases.
Recommended
Motor Control & Drive Front-End
In motor-control and variable-frequency drive front-ends, the EPF10K20TI144-4U generates the PWM patterns, decodes encoder feedback and runs the speed/current control loops at the necessary update rates. Its 1152 logic elements and 12,288-bit embedded RAM comfortably host field-oriented control (FOC) state machines, SVPWM modulators and encoder quadrature decoders. The industrial temperature grade and 5 V tolerance suit inverter-stage electronics where nearby switching nodes introduce temperature swings and ground-bounce transients. Use the dedicated JTAG chain for in-system tuning of PWM dead-time and PI-controller coefficients during drive commissioning.
Recommended
Test & Measurement Instrumentation
The EPF10K20TI144-4U's 12,288-bit embedded RAM, dual-clock logic-array blocks and 102 user I/Os make it suitable for digital-storage oscilloscope trigger engines, logic-analyzer pattern generators and bench-top protocol analyzers. Designers can implement high-speed state machines, custom trigger sequences and on-the-fly data-width conversion without external memory, while the SRAM-based configuration lets vendors ship field-upgradable trigger libraries via JTAG. The 5 V I/O tolerance simplifies interfacing with legacy bench equipment that uses 5 V CMOS levels, and the 144-TQFP package supports mixed-signal PCB layouts where thermal management matters.
Recommended
Legacy Retrofit & Industrial Modernization
For legacy equipment modernization programs, the EPF10K20TI144-4U serves as a drop-in replacement for older FLEX 10K, MAX 7000 and APEX 20K devices that are no longer repairable, while preserving the original PCB land pattern and JTAG test infrastructure. Its pin-compatibility with EPF10K20TC144-4N, EPF10K10TI144-4 and other 144-TQFP FLEX 10K variants (per Site MPN list) means retrofit boards can be re-qualified without respinning the layout. The SRAM-based configuration and Altera JTAG chain also allow modern diagnostic firmware to be loaded onto existing boards, extending equipment service life by years.
Recommended
Recommended Products Summary
Engineering reference data for EPF10K20TI144-4U — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | EPF10K20TI144-4N | EPF10K20TC144-4 | EPF10K20TC144-3 | EPF10K10TI144-4 |
|---|---|---|---|---|---|
| Brand | Intel (Altera) | Intel (Altera) | Intel (Altera) | Intel (Altera) | Intel (Altera) |
| Package | 144-TQFP | 144-TQFP | 144-TQFP | 144-TQFP | 144-TQFP |
| Logic Elements | 1152 | 1152 | 1152 | 1152 | 720 (10K gates) |
| Typical Gates | 20,000 | 20,000 | 20,000 | 20,000 | 10,000 |
| Embedded RAM Bits | 12,288 | 12,288 | 12,288 | 12,288 | 6,144 |
| Speed Grade | -4 | -4 | -4 | -3 (slower) | -4 |
| Temperature Grade | Industrial (-40 °C to +85 °C) | Commercial (0 °C to +70 °C) | Commercial (0 °C to +70 °C) | Commercial (0 °C to +70 °C) | Industrial (-40 °C to +85 °C) |
| User I/Os | 102 | 102 | 102 | 102 | 102 |
| Lifecycle Status | Obsolete (EOL) | Obsolete (EOL) | Obsolete (EOL) | Obsolete (EOL) | Obsolete (EOL) |
Key Differentiators
- Industrial temperature grade (U suffix) (vs EPF10K20TI144-4N)
- Same-die -4 speed grade for timing-critical designs (vs EPF10K20TC144-3)
- 20K-gate capacity in 144-TQFP industrial grade (vs EPF10K10TI144-4)
Design Notes
The EPF10K20TI144-4U requires a stable 5.0 V core supply (VCCINT) and a separately decoupled VCCIO rail per I/O bank. Per the FLEX 10K datasheet, each VCCINT pin should be bypassed with a 0.1 µF ceramic capacitor placed within 5 mm of the pin, plus a 10 µF tantalum bulk capacitor near the package. The I/O banks (VCCIO) can each be powered at 3.3 V or 5.0 V independently to support mixed-voltage interfacing; bypass each VCCIO pin identically. Sequence the supplies so VCCINT is established before VCCIO if 5 V I/O is used with a 3.3 V core logic family in adjacent banks, to prevent back-powering through I/O clamping diodes.
Place the EPC8 or EPC2 configuration PROM as close as physically possible to the DCLK, nCONFIG, nSTATUS, CONF_DONE and DATA0 pins of the EPF10K20TI144-4U. Routing these traces over 25 mm introduces timing skew that can cause configuration failures at cold temperature. Per Altera's FLEX 10K hardware reference, keep the JTAG chain (TDI/TDO/TMS/TCK) under 150 mm total and add a 10 kΩ pull-up on nCONFIG and a 10 kΩ pull-down on JTAG TMS per IEEE 1149.1. Maintain a continuous ground plane under the TQFP-144 paddle area for thermal dissipation; the device can dissipate up to 1.5 W at 100 % logic utilization.
Do not assume that the EPF10K20TI144-4U is electrically compatible with later Cyclone devices on the same TQFP-144 footprint - the JTAG, configuration and power schemes differ fundamentally. Per the FLEX 10K datasheet, configuration data is loaded synchronously from an external PROM using DCLK; Cyclone IV/10 LP devices use active serial (AS) mode with EPCQ PROMs, which is NOT compatible with EPC8/EPC2 timing. Also note that the FLEX 10K device is volatile (SRAM-based), so the configuration must reload on every power-up; a missing or improperly programmed EPC8 will leave the device unconfigured with all I/Os tri-stated.
When driving long PCB traces or external cables, configure EPF10K20TI144-4U outputs with the slowest slew-rate setting in the Quartus / MAX+PLUS II assignment editor to limit ground bounce and EMI. Per the FLEX 10K datasheet, the device supports 2.5-3.3-5.0 V I/O standards with PCI-compliant drive strength; use PCI drive only on signals that require it, since high-strength outputs inject switching noise into adjacent analog sections. Add 22-33 Ω series-termination resistors on clock outputs and high-speed (>50 MHz) control signals to dampen reflections on traces longer than 50 mm.
Compliance Information
RoHS and lead-free status not consistently documented across distributor listings for the EPF10K20TI144-4U; Altera's FLEX 10K family predates widespread RoHS adoption. Request lot-specific material declaration from the supplier before integration into a RoHS-mandated product. AEC-Q100 is not applicable as the device is not marketed as automotive-qualified.
