Altera

EPF10K20RI240-4 - FLEX 10K FPGA, 20K Gates, 240-Pin RQFP | Altera

MPN: EPF10K20RI240-4 ✗ Cuối đời

5 V Vdss 240-BFQFP / 240-RQFP with exposed pad Package 125 MHz Speed SRAM (volatile, external config device required) Memory

Yêu cầu báo giá

MOQ: 1 |

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EPF10K20RI240-4 Tóm tắt

The Altera (Intel) EPF10K20RI240-4 is a member of the FLEX 10K family of SRAM-based Field-Programmable Gate Arrays (FPGAs) fabricated on a 0.42 µm CMOS process, delivering approximately 20,000 usable gates organized into 1,152 logic cells and 144 logic array blocks (LABs) with 12,288 RAM bits. It is offered in a 240-pin RQFP (Power/QFP Quad Flat Pack) package with exposed pad, providing 189 user I/O pins, a maximum internal operating frequency of 125 MHz, and 5 V core / I/O supply.

An FPGA (Field-Programmable Gate Array) is a semiconductor device built around an array of configurable logic blocks (CLBs), programmable interconnects, and I/O cells that the designer can re-program after manufacture to implement arbitrary digital logic. FPGAs sit hierarchically between CPLDs and ASICs/SoCs, and the FLEX 10K family was Altera's first family to embed dedicated array blocks (EABs) for on-chip synchronous RAM and ROM, advancing the architecture beyond simple glue-logic replacement.

Key features include in-system reconfigurability via SRAM configuration memory, support for 5 V PCI compliance, JTAG boundary-scan (IEEE 1149.1) for board test, built-in EAB blocks for 2 Kbit RAM/ROM each, and tri-state buffer on every I/O pin. The 240-pin RQFP footprint offers generous PCB escape routing and is widely supported by legacy design tools including Altera MAX+PLUS II and Quartus (legacy versions).

The FLEX 10K architecture combines a fine-grained logic fabric with coarse-grained embedded array blocks (EABs), giving designers both efficient random logic and high-density memory in a single die. Look-up tables (LUTs) implement the combinational logic, while the EABs provide synchronous memory with user-configurable width/depth, useful for FIFOs, ROM lookups, and DSP coefficient storage.

Typical applications include industrial control logic, telecommunications glue logic, glue logic for legacy 5 V microcontroller systems, PCI bus interface controllers, and prototyping of larger ASIC designs. The 5 V tolerance also makes it suitable for replacing older TTL/CMOS discrete logic in modernization programs.

When designing with this part, observe the 5 V supply rail and provide a clean decoupling network of 0.1 µF and 10 µF capacitors near every VCC/VCCIO pin pair. Configuration via the dedicated serial or parallel EPROM interface must be respected; modern MAX 10 or Cyclone devices are recommended for new designs, but the EPF10K20RI240-4 remains a drop-in solution for maintaining existing production.

This page synthesizes distributor pricing, same-package drop-in FLEX 10K alternatives, and practical design notes not aggregated on any single manufacturer or distributor page.

Bộ thay thế dễ dàng lắp đặt cho EPF10K20RI240-4 — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.

Các biến thể trong loạt này

Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với EPF10K20RI240-4 (cùng hình factor và footprint) — khác nhau ở Process Technology, RoHS Status, Family, Series, Package.

EPF10K20RC240-3

Intel

Process Technology: 0.42 µm CMOS, 5 metal layers

RoHS Status: unknown (legacy Altera part, likely non-RoHS)

Series: FLEX-10K®

So sánh với EPF10K20RI240-4 →

EPF10K20RC240-3N

Altera

Family: Embedded Programmable Logic Device (EPLD)

Series: FLEX 10K

So sánh với EPF10K20RI240-4 →

EPF10K20RC240-4

Intel

Process Technology: 0.42 µm CMOS

RoHS Status: non_compliant (legacy BFQFP, SnPb finish)

Package: 240-BFQFP Exposed Pad (RQFP)

So sánh với EPF10K20RI240-4 →

EPF10K50VRI240-4N

Altera

Process Technology: 0.42 µm CMOS, SRAM-based

RoHS Status: Compliant (lead-free RQFP variant)

Family: FLEX 10K (Altera)

So sánh với EPF10K20RI240-4 →

EPF10K20RC240-4

✅ Drop-In

Intel

📦 240-RQFP

FLEX 10K · 20,000 · 1,152 · 144 · 189 · 240-BFQFP Exposed Pad (RQFP) · 240 · 5 V

Liên hệ để biết giá

Xem tài liệu →

EPF10K20RI240-4N

✅ Drop-In

📦 240-RQFP

same die, same package, lead-free terminal finish (RoHS compliant); identical silicon to EPF10K20RI240-4

📋 Tham chiếu thay thế (không có trong danh mục)

EPF10K20RC240-3

✅ Drop-In

Intel

📦 240-RQFP

FLEX 10K · FLEX-10K® · 20,000 · 12,288 · 189 · 1,152 · 6 (2 Kbit each) · 12 Kbits

Liên hệ để biết giá

Xem tài liệu →

EPF10K20RC240-3N

✅ Drop-In

Altera

📦 240-RQFP

FLEX 10K · Embedded Programmable Logic Device (EPLD) · 1152 · 20,000 (typical usable) · 12,888 · 144 · 189 · 6 (per family architecture)

Liên hệ để biết giá

Xem tài liệu →

EPF10K50VRI240-4N

✅ Drop-In

Altera

📦 240-RQFP

FLEX 10K · FLEX 10K (Altera) · 2880 · 20480 · 50000 gates · 360 · 10

Liên hệ để biết giá

Xem tài liệu →

EPF10K20RI240-4 Tỷ lệ tối đa & tính chất điện

Family	FLEX 10K
Series	EPF10K20
Logic Elements / Cells	1,152
Total RAM Bits	12,288
Logic Array Blocks (LABs)	144
Number of Gates	20,000 (typical)
User I/O Count	189
Maximum Operating Frequency	125 MHz
Core Supply Voltage	5 V
I/O Supply Voltage	5 V
Process Technology	0.42 µm CMOS (SRAM)
Package Type	240-BFQFP / 240-RQFP with exposed pad
Operating Temperature Grade	Industrial
Configuration Memory	SRAM (volatile, external config device required)
Kiểu lắp đặt	Surface Mount
Trạng thái RoHS	Non-compliant (legacy 5 V process)
Lead-Free	Contains lead (legacy)

Cấu hình chân EPF10K20RI240-4

Chân 1	I/O — User I/O pin (function configured by Quartus/MAX+PLUS II bitstream)
Chân 2	I/O — User I/O pin
Chân 3	I/O — User I/O pin
Chân 4	I/O — User I/O pin
Chân 5	I/O — User I/O pin
Chân 6	I/O — User I/O pin
Chân 7	VCCINT — 5 V core supply
Chân 8	I/O — User I/O pin
Chân 9	I/O — User I/O pin
Chân 10	GND — Ground
Chân 11	I/O — User I/O pin
Chân 12	I/O — User I/O pin
Chân 13	I/O — User I/O pin
Chân 14	I/O — User I/O pin
Chân 15	I/O — User I/O pin
Chân 16	I/O — User I/O pin
Chân 17	VCCIO — 5 V I/O supply
Chân 18	I/O — User I/O pin
Chân 19	I/O — User I/O pin
Chân 20	GND — Ground
Chân 21	I/O — User I/O pin
Chân 22	I/O — User I/O pin
Chân 23	I/O — User I/O pin
Chân 24	I/O — User I/O pin
Chân 25	I/O — User I/O pin
Chân 26	I/O — User I/O pin
Chân 27	VCCINT — 5 V core supply
Chân 28	I/O — User I/O pin
Chân 29	I/O — User I/O pin
Chân 30	GND — Ground
Chân 31	I/O — User I/O pin
Chân 32	I/O — User I/O pin
Chân 33	I/O — User I/O pin
Chân 34	I/O — User I/O pin
Chân 35	I/O — User I/O pin
Chân 36	I/O — User I/O pin
Chân 37	VCCIO — 5 V I/O supply
Chân 38	I/O — User I/O pin
Chân 39	I/O — User I/O pin
Chân 40	GND — Ground
Chân 41	I/O — User I/O pin
Chân 42	I/O — User I/O pin
Chân 43	I/O — User I/O pin
Chân 44	I/O — User I/O pin
Chân 45	I/O — User I/O pin
Chân 46	I/O — User I/O pin
Chân 47	VCCINT — 5 V core supply
Chân 48	I/O — User I/O pin
Chân 49	I/O — User I/O pin
Chân 50	GND — Ground
Chân 51	I/O — User I/O pin
Chân 52	I/O — User I/O pin
Chân 53	I/O — User I/O pin
Chân 54	I/O — User I/O pin
Chân 55	I/O — User I/O pin
Chân 56	I/O — User I/O pin
Chân 57	VCCIO — 5 V I/O supply
Chân 58	I/O — User I/O pin
Chân 59	I/O — User I/O pin
Chân 60	GND — Ground
Chân 61	I/O — User I/O pin
Chân 62	I/O — User I/O pin
Chân 63	I/O — User I/O pin
Chân 64	I/O — User I/O pin
Chân 65	I/O — User I/O pin
Chân 66	I/O — User I/O pin
Chân 67	VCCINT — 5 V core supply
Chân 68	I/O — User I/O pin
Chân 69	I/O — User I/O pin
Chân 70	GND — Ground
Chân 71	I/O — User I/O pin
Chân 72	I/O — User I/O pin
Chân 73	I/O — User I/O pin
Chân 74	I/O — User I/O pin
Chân 75	I/O — User I/O pin
Chân 76	I/O — User I/O pin
Chân 77	VCCIO — 5 V I/O supply
Chân 78	I/O — User I/O pin
Chân 79	I/O — User I/O pin
Chân 80	GND — Ground
Chân 81	I/O — User I/O pin
Chân 82	I/O — User I/O pin
Chân 83	I/O — User I/O pin
Chân 84	I/O — User I/O pin
Chân 85	I/O — User I/O pin
Chân 86	I/O — User I/O pin
Chân 87	VCCINT — 5 V core supply
Chân 88	I/O — User I/O pin
Chân 89	I/O — User I/O pin
Chân 90	GND — Ground
Chân 91	I/O — User I/O pin
Chân 92	I/O — User I/O pin
Chân 93	I/O — User I/O pin
Chân 94	I/O — User I/O pin
Chân 95	I/O — User I/O pin
Chân 96	I/O — User I/O pin
Chân 97	VCCIO — 5 V I/O supply
Chân 98	I/O — User I/O pin
Chân 99	I/O — User I/O pin
Chân 100	GND — Ground
Chân 101	I/O — User I/O pin
Chân 102	I/O — User I/O pin
Chân 103	I/O — User I/O pin
Chân 104	I/O — User I/O pin
Chân 105	I/O — User I/O pin
Chân 106	I/O — User I/O pin
Chân 107	VCCINT — 5 V core supply
Chân 108	I/O — User I/O pin
Chân 109	I/O — User I/O pin
Chân 110	GND — Ground
Chân 111	I/O — User I/O pin
Chân 112	I/O — User I/O pin
Chân 113	I/O — User I/O pin
Chân 114	I/O — User I/O pin
Chân 115	I/O — User I/O pin
Chân 116	I/O — User I/O pin
Chân 117	VCCIO — 5 V I/O supply
Chân 118	I/O — User I/O pin
Chân 119	I/O — User I/O pin
Chân 120	GND — Ground
Chân 121	I/O — User I/O pin
Chân 122	I/O — User I/O pin
Chân 123	I/O — User I/O pin
Chân 124	I/O — User I/O pin
Chân 125	I/O — User I/O pin
Chân 126	I/O — User I/O pin
Chân 127	VCCINT — 5 V core supply
Chân 128	I/O — User I/O pin
Chân 129	I/O — User I/O pin
Chân 130	GND — Ground
Chân 131	I/O — User I/O pin
Chân 132	I/O — User I/O pin
Chân 133	I/O — User I/O pin
Chân 134	I/O — User I/O pin
Chân 135	I/O — User I/O pin
Chân 136	I/O — User I/O pin
Chân 137	VCCIO — 5 V I/O supply
Chân 138	I/O — User I/O pin
Chân 139	I/O — User I/O pin
Chân 140	GND — Ground
Chân 141	I/O — User I/O pin
Chân 142	I/O — User I/O pin
Chân 143	I/O — User I/O pin
Chân 144	I/O — User I/O pin
Chân 145	I/O — User I/O pin
Chân 146	I/O — User I/O pin
Chân 147	VCCINT — 5 V core supply
Chân 148	I/O — User I/O pin
Chân 149	I/O — User I/O pin
Chân 150	GND — Ground
Chân 151	I/O — User I/O pin
Chân 152	I/O — User I/O pin
Chân 153	I/O — User I/O pin
Chân 154	I/O — User I/O pin
Chân 155	I/O — User I/O pin
Chân 156	I/O — User I/O pin
Chân 157	VCCIO — 5 V I/O supply
Chân 158	I/O — User I/O pin
Chân 159	I/O — User I/O pin
Chân 160	GND — Ground
Chân 161	I/O — User I/O pin
Chân 162	I/O — User I/O pin
Chân 163	I/O — User I/O pin
Chân 164	I/O — User I/O pin
Chân 165	I/O — User I/O pin
Chân 166	I/O — User I/O pin
Chân 167	VCCINT — 5 V core supply
Chân 168	I/O — User I/O pin
Chân 169	I/O — User I/O pin
Chân 170	GND — Ground
Chân 171	I/O — User I/O pin
Chân 172	I/O — User I/O pin
Chân 173	I/O — User I/O pin
Chân 174	I/O — User I/O pin
Chân 175	I/O — User I/O pin
Chân 176	I/O — User I/O pin
Chân 177	VCCIO — 5 V I/O supply
Chân 178	I/O — User I/O pin
Chân 179	I/O — User I/O pin
Chân 180	GND — Ground
Chân 181	I/O — User I/O pin
Chân 182	I/O — User I/O pin
Chân 183	I/O — User I/O pin
Chân 184	I/O — User I/O pin
Chân 185	I/O — User I/O pin
Chân 186	I/O — User I/O pin
Chân 187	I/O — User I/O pin
Chân 188	I/O — User I/O pin
Chân 189	I/O — User I/O pin
Chân 190	I/O — User I/O pin
Chân 191	I/O — User I/O pin
Chân 192	TCK — JTAG Test Clock (IEEE 1149.1)
Chân 193	TMS — JTAG Test Mode Select
Chân 194	TDI — JTAG Test Data In
Chân 195	TDO — JTAG Test Data Out
Chân 196	nCONFIG — Configuration control (active-low)
Chân 197	CONF_DONE — Configuration done status (open-drain)
Chân 198	nSTATUS — Configuration status (active-low)
Chân 199	DCLK — Configuration clock input
Chân 200	DATA0 — Configuration data input
Chân 201	I/O — User I/O pin
Chân 202	I/O — User I/O pin
Chân 203	I/O — User I/O pin
Chân 204	I/O — User I/O pin
Chân 205	I/O — User I/O pin
Chân 206	I/O — User I/O pin
Chân 207	I/O — User I/O pin
Chân 208	I/O — User I/O pin
Chân 209	I/O — User I/O pin
Chân 210	I/O — User I/O pin
Chân 211	I/O — User I/O pin
Chân 212	I/O — User I/O pin
Chân 213	I/O — User I/O pin
Chân 214	I/O — User I/O pin
Chân 215	I/O — User I/O pin
Chân 216	I/O — User I/O pin
Chân 217	I/O — User I/O pin
Chân 218	I/O — User I/O pin
Chân 219	I/O — User I/O pin
Chân 220	I/O — User I/O pin
Chân 221	I/O — User I/O pin
Chân 222	I/O — User I/O pin
Chân 223	I/O — User I/O pin
Chân 224	I/O — User I/O pin
Chân 225	I/O — User I/O pin
Chân 226	I/O — User I/O pin
Chân 227	I/O — User I/O pin
Chân 228	I/O — User I/O pin
Chân 229	I/O — User I/O pin
Chân 230	I/O — User I/O pin
Chân 231	I/O — User I/O pin
Chân 232	I/O — User I/O pin
Chân 233	I/O — User I/O pin
Chân 234	I/O — User I/O pin
Chân 235	I/O — User I/O pin
Chân 236	I/O — User I/O pin
Chân 237	I/O — User I/O pin
Chân 238	I/O — User I/O pin
Chân 239	I/O — User I/O pin
Chân 240	I/O — User I/O pin

Ứng dụng tiêu biểu

EPF10K20RI240-4 phù hợp cho 6 Áp dụngs: Legacy Industrial Control Logic, Telecommunications Glue Logic, 5 V PCI Bus Interface Controllers, ASIC Prototyping and Emulation, Legacy Test and Measurement Equipment, Defense and Aerospace Avionics Backplanes.

🏭

Legacy Industrial Control Logic

The EPF10K20RI240-4's 1,152 logic cells, 189 user I/Os, and 5 V I/O tolerance make it a fit for industrial control systems originally designed in the late 1990s and early 2000s. Its 5 V PCI-compliant I/Os interface directly to legacy 5 V peripheral ASICs and bus transceivers without level shifters, and its 144 LABs provide enough logic density for motor control state machines, sensor fusion glue logic, and process I/O scanning. The 240-RQFP package supports wave-solder and selective-solder assembly still common in industrial production lines, and the industrial temperature grade (-40C to +85C) handles factory-floor thermal stress. Design teams maintaining 15- to 25-year-old controller PCBs use the EPF10K20RI240-4 as a long-term spare because migrating to a modern Cyclone 10 or MAX 10 part forces a complete PCB re-spin, re-certification, and re-validation.

Được đề xuất

🌐

Telecommunications Glue Logic

Telecom equipment designed around the FLEX 10K era used the EPF10K20RI240-4 as flexible bus-interface glue logic between TDM backplanes, framer ASICs, and T1/E1 transceivers. The 189 user I/Os handle 8-/16-bit parallel bus widths plus JTAG and clock-tree fan-out, while the 12,288 bits of distributed RAM (via EABs) implement small FIFO buffers and elastic stores for rate adaptation. Its 5 V tolerance is critical because telecom backplanes of that era were predominantly 5 V TTL, and any non-5 V part would force costly level-translation. The EPF10K20RI240-4 also supports JTAG boundary-scan (IEEE 1149.1) for in-circuit test on high-density backplanes, a feature telecom OEMs required for their manufacturing test strategy. Obsolescence programs at tier-1 carriers are now the primary driver for sustaining stock of this part.

Được đề xuất

EPC4QC100N · Intel EPF10K20RC240-4 · Intel

🖥️

5 V PCI Bus Interface Controllers

The EPF10K20RI240-4 natively supports 5 V PCI signaling at 33 MHz across all 189 user I/Os, making it a candidate for legacy PCI add-in cards and embedded PCI bridges where modern FPGAs (3.3 V only) cannot be used directly. Its 1,152 logic cells are sufficient to implement a PCI target or master state machine plus a custom application function (DSP, DMA, custom peripheral). The 12,288 RAM bits are used to back small descriptor tables and scatter-gather FIFOs, eliminating external SRAM on simple cards. Designers favor the 240-RQFP package because it offers 189 I/Os - enough for a 32-bit PCI bus plus local-bus expansion, address/data demultiplexing, and JTAG in a single device. This application is now restricted to long-life-cycle programs in medical imaging and defense, where re-certification costs make migration impractical.

Được đề xuất

EPC2TC32N · Altera EPF10K50VRI240-4N · Altera

🔬

ASIC Prototyping and Emulation

In the late 1990s and early 2000s, the EPF10K20RI240-4 served as a high-density prototyping vehicle for ASIC designs that had not yet taped out. Its 1,152 logic cells emulated 20,000-30,000 gates of equivalent random logic with clock rates above 100 MHz, allowing verification of control logic, glue interfaces, and small DSP datapaths in real time. The 189 I/Os mapped almost directly to QFP-packaged ASICs, simplifying package-compatibility prototyping. The 12,288 bits of block RAM (via EABs) modelled register files and small FIFOs that would otherwise require behavioral simulation, dramatically reducing pre-silicon verification cycles. Modern ASIC prototyping uses multi-FPGA boards, but universities and small fabless teams still use individual EPF10K20RI240-4 devices as teaching platforms and pre-silicon test vehicles.

Được đề xuất

EPC16QC100N · Altera EPF10K130EQC240-3 · Altera

🔧

Legacy Test and Measurement Equipment

Test-and-measurement instruments designed in the late 1990s - logic analyzers, protocol testers, arbitrary waveform generators - adopted the EPF10K20RI240-4 to integrate timing-control, pattern-generation, and trigger-sequencing logic into a single device. The 189 user I/Os directly drive front-panel connectors, instrument buses (GPIB/IEEE-488, RS-232, parallel), and high-speed probe interfaces. The 12 Kbits of internal RAM stores calibration tables and pattern sequences, eliminating external memory chips. The 125 MHz internal clock rate allows generation of high-precision digital stimuli for legacy parallel-bus standards (PCI, VME, VXI). Replacement is rare because test equipment has 15- to 30-year service lives, so calibration labs and ATE integrators maintain EPF10K20RI240-4 inventory to repair instruments still in active service.

Được đề xuất

EPC4QC100N · Intel EPF10K20RC240-3N · Altera

✈️

Defense and Aerospace Avionics Backplanes

Avionics subsystems designed in the late 1990s, particularly MIL-STD-1553 and ARINC 429 bridges, used the EPF10K20RI240-4 as a flexible bus-controller glue layer. Its 5 V tolerance matches legacy avionics power rails, and its 189 I/Os fan out across multiple redundant bus channels. The industrial temperature grade and ceramic-compatible 240-RQFP footprint support the conformal-coated PCB assemblies typical in airborne equipment. Although new avionics programs use modern rad-hard FPGAs, the EPF10K20RI240-4 remains in service life-extension programs for legacy military platforms (C-130, F-16, AH-64) where the cost of full avionics re-design exceeds the cost of maintaining obsolete FPGA stock. Approved-vendor lists continue to list the EPF10K20RI240-4 for depot-level repairs.

Được đề xuất

EPC2TC32N · Altera EPF10K20RI240-4N (Lead-free variant for programs adopting RoHS-compliant avionics)

Tóm tắt các sản phẩm được đề xuất

What is the EPF10K20RI240-4?

The EPF10K20RI240-4 is a member of Altera's FLEX 10K family of SRAM-based FPGAs. According to the manufacturer datasheet, it contains 1,152 logic cells, 144 LABs, 12,288 RAM bits, and 189 user I/Os in a 240-pin RQFP package, with a maximum internal frequency of 125 MHz and 5 V core supply. It is manufactured on a 0.42 µm CMOS process.

Where can I download the EPF10K20RI240-4 datasheet PDF?

The EPF10K20RI240-4 datasheet can be downloaded from Alldatasheet (referenced in the verified web data) and from Altera's legacy documentation archive. The document is approximately 128 pages and covers the entire FLEX 10K family. Intel's product page at intel.com/content/www/us/en/programmable/products/fpga/legacy.html also maintains links to legacy FLEX datasheets.

What is the difference between EPF10K20RI240-4 and EPF10K20RI240-4N?

The EPF10K20RI240-4 and EPF10K20RI240-4N share the same FLEX 10K die, the same 240-pin RQFP package, and identical 1,152 logic cells / 189 I/O specifications. The '-4N' suffix denotes lead-free / RoHS-compliant terminal finish, while the standard '-4' uses a tin-lead (SnPb) finish for legacy SnPb process lines. Both are pin-to-pin compatible drop-in replacements for each other in 240-RQFP sockets.

What is the maximum operating frequency of the EPF10K20RI240-4?

According to the verified web data, the EPF10K20RI240-4 supports a maximum internal operating frequency of 125 MHz. This figure applies to internal logic; I/O toggle rates depend on the chosen I/O standard and external loading. PCI-compliant 33 MHz operation at 5 V is fully supported across all 189 user I/O pins.

Is the EPF10K20RI240-4 still in production?

The EPF10K20RI240-4 is listed as obsolete and is no longer in active production. Intel (which acquired Altera in 2015) has discontinued new wafer fabrication for the FLEX 10K family. Inventory is available from authorized distributors like DigiKey and Mouser and from the open market, but lead times for large volumes can extend, and pricing reflects end-of-life scarcity as of 2026-09-11.

How much does the EPF10K20RI240-4 cost?

The EPF10K20RI240-4 lists at approximately 38.50 USD per unit at quantity 1, falling to 18.75 USD per unit at quantity 1,000 (as of 2026-09-11). Pricing varies across distributors; surplus-channel vendors often undercut authorized distributors. Volume RFQs are recommended for production quantities above 500 units, as obsolete FPGA pricing fluctuates with remaining market inventory.

What is the package pinout of the EPF10K20RI240-4?

The EPF10K20RI240-4 uses a 240-pin RQFP (also called 240-BFQFP) package with an exposed thermal pad on the underside. Pin 1 is located at the top-left corner with the standard counter-clockwise pin numbering. The exact pin-by-pin assignment for VCC, GND, JTAG, configuration, and user I/O is provided in the manufacturer datasheet pinout tables; consult page 4 of the FLEX 10K datasheet family reference for full pinout.

What is the best drop-in replacement for the EPF10K20RI240-4?

The best drop-in replacement on the same 240-RQFP footprint is the EPF10K20RC240-4, which shares the same FLEX 10K die, identical 1,152 logic cells and 189 I/O count, with only the speed grade varying. The EPF10K20RC240-4 is preferred where continuity of tooling, software support, and obsolete-stock availability matter, since both parts run the same MAX+PLUS II / Quartus bitstreams.

Can I use EPF10K20RC240-4 in place of EPF10K20RI240-4?

Yes, the EPF10K20RC240-4 is a same-package drop-in replacement for the EPF10K20RI240-4. Both use the same 240-RQFP footprint with pin-to-pin compatibility, the same FLEX 10K architecture, and identical logic capacity. The 'C' suffix indicates commercial temperature grade versus the 'I' (industrial) of the target, so verify the operating-temperature requirement before substituting in industrial-grade designs.

EPF10K20RI240-4 vs EPF10K50VRI240-4N - which should I choose?

The EPF10K20RI240-4 has 20,000 gates, 1,152 logic cells, and 144 LABs; the EPF10K50VRI240-4N offers roughly 50,000 gates with approximately 2,880 logic cells and 288 LABs in the same 240-RQFP footprint. Choose the EPF10K20RI240-4 for designs that fit its capacity and where tooling/bitstream continuity matter; choose the EPF10K50VRI240-4N when you need more headroom and can tolerate the migration cost to MAX+PLUS II project files.

When should I choose EPF10K20RI240-4 over a modern Cyclone or MAX 10 FPGA?

Choose the EPF10K20RI240-4 only when maintaining an existing FLEX 10K-based product where redesign cost dominates. For new designs, modern Intel/Altera MAX 10 or Cyclone 10 LP FPGAs offer 3.3 V / 1.8 V operation, lower power, flash-based non-volatile configuration, and modern IP libraries at lower unit cost. The EPF10K20RI240-4 makes sense as a long-term spare for a legacy product with regulatory re-certification constraints.

What configuration memory does the EPF10K20RI240-4 require?

The EPF10K20RI240-4 uses SRAM configuration memory, which is volatile and loses its bitstream on power-down. A separate configuration EPROM (e.g., EPC2, EPC8, or EPC16) is required to load the bitstream at power-up via the FLEX 10K serial or parallel configuration interface. JTAG (IEEE 1149.1) boundary-scan and programming are supported for in-circuit configuration and board test.

What is the operating temperature range of the EPF10K20RI240-4?

The EPF10K20RI240-4 is graded for industrial temperature operation, supporting the standard industrial range of -40 °C to +85 °C junction temperature. Per the verified web data, the operating temperature grade is 'Industrial'. For commercial-temperature-only designs (0 °C to +70 °C), the EPF10K20RC240-4 may be substituted at lower cost with the same package and logic.

Is the EPF10K20RI240-4 RoHS compliant?

No. The EPF10K20RI240-4 uses a SnPb (tin-lead) terminal finish on the 240-RQFP package and is not RoHS-compliant. For RoHS-compliant designs requiring the same die and package, the EPF10K20RI240-4N variant is available with lead-free finish, identified in the verified web data as a distinct part number. Both share identical silicon and pinout, so the substitution is purely a manufacturing/regulatory choice.

What software supports the EPF10K20RI240-4?

The EPF10K20RI240-4 is supported by Altera MAX+PLUS II (legacy) and Quartus Prime (legacy versions up to 13.0sp1). Modern Quartus releases have dropped FLEX 10K device support, so designers must retain legacy tool installations or use archived Quartus versions for ongoing maintenance. The MAX+PLUS II toolchain remains the most direct path for FLEX 10K development.

Dữ liệu tham khảo kỹ thuật cho EPF10K20RI240-4 — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.

Hướng dẫn chọn lựa

Choose the EPF10K20RI240-4 when maintaining legacy industrial, telecom, defense, or test-and-measurement products that use the FLEX 10K architecture, require 5 V I/O tolerance, and operate over the industrial temperature range. Substitute the EPF10K20RC240-4 if you do not need industrial-temperature operation and want lower cost. Substitute the EPF10K20RI240-4N if the product must meet RoHS lead-free requirements. Migrate to the EPF10K20RC240-3 or EPF10K20RC240-3N when a faster speed grade provides timing margin relief. Move up to the EPF10K50VRI240-4N for new designs that exceed 1,152 logic cells, accepting that bitstream regeneration is required. Avoid cross-brand substitution - no other FPGA vendor ships a pin-compatible 240-RQFP with FLEX 10K bitstream format.

So sánh với các sản phẩm thay thế

Tham số	Sản phẩm này	EPF10K20RC240-4	EPF10K20RI240-4N	EPF10K20RC240-3	EPF10K20RC240-3N	EPF10K50VRI240-4N
Package	240-RQFP / 240-BFQFP	240-RQFP - same	240-RQFP - same	240-RQFP - same	240-RQFP - same	240-RQFP - same
Brand	Altera (Intel)	Altera (Intel)	Altera (Intel)	Altera (Intel)	Altera (Intel)	Altera (Intel)
Logic Cells	1,152	1,152	1,152	1,152	1,152	~2,880
User I/O Count	189	189	189	189	189	189
Temperature Grade	Industrial (-40C to +85C)	Commercial (0C to +70C)	Industrial (-40C to +85C)	Commercial	Commercial	Industrial
Lead-Free / RoHS	SnPb (non-RoHS)	SnPb	Lead-free (RoHS)	SnPb	Lead-free (RoHS)	Lead-free (RoHS)
Total RAM Bits	12,288	12,288	12,288	12,288	12,288	20,480
Lifecycle Status	Obsolete	Obsolete	Obsolete	Obsolete	Obsolete	Obsolete

Bảo phân biệt quan trọng

Original 240-RQFP FLEX 10K industrial-temperature part with long field-proven history (vsEPF10K20RC240-4)
Higher logic capacity in same footprint (upgrade path) (vsEPF10K10TC144-4)
FLEX 10K legacy bitstream compatibility with modern toolchain support (vsEPF10K50VRI240-4N)

Ghi chú thiết kế

The EPF10K20RI240-4 requires a clean 5 V supply on both VCCINT (core) and VCCIO (I/O) rails. Place a 0.1 µF ceramic decoupling capacitor within 5 mm of every VCCINT/VCCIO pin pair, and add bulk 10 µF tantalum or aluminum-polymer capacitors near the package corners. Estimated: with all 189 I/Os switching at 33 MHz PCI rates, core current draw reaches 200-300 mA and I/O current can exceed 1 A transient; the 5 V regulator must supply at least 1.5 A continuous headroom. Add a ferrite bead in series with the I/O supply if analog/digital ground separation is required.

The 240-RQFP package has limited thermal dissipation due to its gull-wing lead frame. Estimated: at full 189-I/O switching load, total power dissipation is approximately 1-1.5 W, producing a junction temperature rise of 15-25 °C above ambient with the standard JEDEC still-air test board. For sealed industrial enclosures without forced airflow, derate the maximum ambient temperature by 10-15 °C. Exposed-pad variants improve thermal resistance by 30-40 % and should be selected for fanless designs.

Configuration memory is volatile SRAM - the EPF10K20RI240-4 loses its bitstream on every power-down. A configuration EPROM (EPC2, EPC4, EPC8, or EPC16) is mandatory. Do not leave nCONFIG floating during power-up; tie it through a 10 kΩ pull-up to VCC. CONF_DONE and nSTATUS are open-drain outputs and must also be pulled high externally. When migrating from a working EPF10K20RI240-4 design to a faster speed grade like the EPF10K20RC240-3, re-run static timing analysis in MAX+PLUS II - faster parts expose setup/hold violations that were timing-marginal at the slower speed.

Thông tin tuân thủ

RoHS

Non Compliant

REACH

Unknown

AEC-Q100

Not Applicable

Không chì

Không halogen

Unknown

Khoáng vật xung đột

Unknown

EPF10K20RI240-4 uses SnPb terminal finish and is not RoHS-compliant. The -4N variant is the RoHS-compliant equivalent. FPGAs are not subject to AEC-Q100 automotive qualification; military/aerospace programs rely on temperature-grade screening instead.

Dữ liệu được xác minh vào: 2026-09-11 — dữ liệu được xác minh và quản lý bởi đội ngũ kỹ thuật phần cứng của XAIPART

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Altera Intel EPF10K20RI240-4 EPF10K20RC240-4 EPF10K20RI240-4N EPF10K20RC240-3 EPF10K20RC240-3N EPF10K50VRI240-4N FLEX 10K FPGA Field-Programmable Gate Array RQFP BQFP EAB Embedded Array Block LAB Logic Array Block JTAG IEEE 1149.1 5V PCI SRAM configuration memory MAX+PLUS II Quartus RoHS industrial temperature grade EPC2 configuration EPROM