EP610ILC-25 - Classic EPLD 300 Gates 16 Macrocells 25ns | Altera
MPN: EP610ILC-25 ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $18.5 | $18.50 |
| 10 | $16.2 | $162.00 |
| 100 | $13.95 | $1,395.00 |
| 500 | $11.4 | $5,700.00 |
| 1,000 | $9.85 | $9,850.00 |
EP610ILC-25 Overview
A CPLD (Complex Programmable Logic Device) is a non-volatile programmable logic IC that combines multiple PAL-like macrocell arrays with a central interconnect, allowing engineers to implement custom glue logic, state machines, and bus interface functions without the cost of an ASIC. The EP610 belongs to Altera's Classic EPLD family — the early 5V generation that pre-dated the MAX 7000 series and now sits firmly in the legacy/last-time-buy segment of the Altera (now Intel PSG) catalog.
Key features of the EP610ILC-25 include 4 dedicated inputs and 16 bidirectional I/O pins (20 total inputs), 16 macrocells with configurable D/T/JK/SR flip-flop options, 160 product terms for sum-of-products logic, and a 25ns pin-to-pin propagation delay that supports a 40 MHz internal fMAX. The device is electrically erasable, enabling in-system reprogramming during development and field upgrades. It operates from a single 5V supply (4.75V to 5.25V) with commercial temperature range of 0C to +70C.
The EP610ILC-25 architecture pairs a programmable AND array feeding a fixed OR array into 16 macrocells, each capable of registered or combinatorial output with selectable feedback paths. The JTAG-less, 5V-only design philosophy makes it a straightforward drop-in for legacy PAL/GAL replacement designs and for engineers migrating older prototype boards into a single, denser, erasable part.
Typical applications include legacy glue logic replacement, address decoding for 80C186/80C51 microcontroller systems, bus interface and arbitration logic, 5V state machines in industrial control, and education/lab platforms teaching programmable logic fundamentals. The 28-pin PLCC socket footprint remains widely supported on legacy backplanes and industrial SBCs.
When designing with this part, verify that the development toolchain (MAX+PLUS II or older Altera classic support) is still available, as modern Quartus flows may not target the EP610 family. Confirm socket availability — J-lead PLCC-28 sockets are still in production but increasingly specialized. For new designs, evaluate MAX II or MAX V CPLDs as modern equivalents.
This page synthesizes distributor stock and lead-time intelligence, pin-compatible same-family drop-in alternatives, and practical legacy-design notes not consolidated in the original Altera datasheet.
Drop-in alternatives for EP610ILC-25 — 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 EP610ILC-25 (same form factor and footprint) — differing in Package, Operating Temperature, Mounting Type, Family, Propagation Delay (tPD).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
EP610ILC-10
✅ Drop-In✓ In Stock
$7.2 / Unit
View Datasheet →EP610DC-25
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$9.95 / Unit
View Datasheet →EP610DC-30
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$10.4 / Unit
View Datasheet →EP610DC-35
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$18.4 / Unit
View Datasheet →EP610DC-15
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$7.95 / Unit
View Datasheet →EP610DC-20
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$15.85 / Unit
View Datasheet →EP610ILC-25 Maximum Ratings & Electrical Characteristics
| Family | Classic EPLD (EP610 series) |
| Device Type | EEPLD (Electrically Erasable PLD) |
| Usable Gates | 300 |
| Macrocells | 16 |
| Product Terms | 160 |
| Maximum Operating Frequency (fMAX) | 40 MHz |
| Pin-to-Pin Propagation Delay (tPD) | 25 ns |
| Supply Voltage (VCC) | 4.75 V to 5.25 V |
| Nominal Supply Voltage | 5 V |
| Total Inputs | 20 |
| Dedicated Inputs | 4 |
| Bidirectional I/O Pins | 16 |
| Operating Temperature Range | 0 C to +70 C (commercial) |
| Package | 28-pin PLCC (J-lead) |
| Mounting Type | Surface Mount |
| Process Technology | CMOS, electrically erasable |
| Programming Method | In-system, electrically erasable |
EP610ILC-25 Pin Configuration
| Pin 1 | INPUT1 — Dedicated input 1 |
| Pin 2 | I/O0 — Bidirectional I/O pin 0 |
| Pin 3 | I/O1 — Bidirectional I/O pin 1 |
| Pin 4 | I/O2 — Bidirectional I/O pin 2 |
| Pin 5 | I/O3 — Bidirectional I/O pin 3 |
| Pin 6 | I/O4 — Bidirectional I/O pin 4 |
| Pin 7 | I/O5 — Bidirectional I/O pin 5 |
| Pin 8 | VCC — 5V supply voltage |
| Pin 9 | I/O6 — Bidirectional I/O pin 6 |
| Pin 10 | I/O7 — Bidirectional I/O pin 7 |
| Pin 11 | I/O8 — Bidirectional I/O pin 8 |
| Pin 12 | I/O9 — Bidirectional I/O pin 9 |
| Pin 13 | I/O10 — Bidirectional I/O pin 10 |
| Pin 14 | I/O11 — Bidirectional I/O pin 11 |
| Pin 15 | GND — Ground |
| Pin 16 | I/O12 — Bidirectional I/O pin 12 |
| Pin 17 | I/O13 — Bidirectional I/O pin 13 |
| Pin 18 | I/O14 — Bidirectional I/O pin 14 |
| Pin 19 | I/O15 — Bidirectional I/O pin 15 |
| Pin 20 | INPUT2 — Dedicated input 2 |
| Pin 21 | INPUT3 — Dedicated input 3 |
| Pin 22 | INPUT4 — Dedicated input 4 |
| Pin 23 | NC — Not connected (per datasheet) |
| Pin 24 | NC — Not connected (per datasheet) |
| Pin 25 | NC — Not connected (per datasheet) |
| Pin 26 | NC — Not connected (per datasheet) |
| Pin 27 | NC — Not connected (per datasheet) |
| Pin 28 | GND — Ground (secondary) |
Typical Applications
EP610ILC-25 is suitable for 6 applications: Legacy Glue Logic Replacement, Microcontroller Address Decoding, Bus Interface and Arbitration Logic, Industrial 5V State Machines, Education and Lab Logic Design Platform, Retro Computing and Hobbyist Projects.
Legacy Glue Logic Replacement
The EP610ILC-25 fits legacy glue logic replacement because it consolidates multiple discrete PAL/GAL devices into a single 28-pin PLD with 16 macrocells and 160 product terms. In a typical migration, a board originally populated with three or four 20-pin PALs implementing bus decode, interrupt steering, and timing generation can be replaced by one EP610ILC-25 with simplified routing. The 25ns pin-to-pin delay is well-matched to 80C186 and 80C51 timing budgets, where address decoding must complete within one clock cycle at 20 MHz to 25 MHz. Engineers should verify the original design's fan-in constraints since the Classic EPLD's 16 dedicated I/O plus 4 inputs fit most decode-only designs.
Recommended
Microcontroller Address Decoding
The EP610ILC-25 is well suited to microcontroller address decoding because its 16 macrocells comfortably implement chip-select logic for 8 to 12 peripherals while the 25ns tPD matches 80C186/80C51 access cycles. The dedicated input pins (4) and bidirectional I/O pins (16) cover address, chip-select, and peripheral-enable signals in a typical 16-bit or 32-bit address bus decoding scheme. Compared to discrete 74LS138 decoders, the EP610ILC-25 offers programmable flexibility for non-standard address windows. Designers should budget for the device's 5V-only supply and add level shifters if the microcontroller operates at 3.3V.
Recommended
Bus Interface and Arbitration Logic
The EP610ILC-25 supports bus interface and arbitration logic through its 16 macrocells and 160 product terms, sufficient to implement multi-master bus arbiters, DMA handshakes, and bus-bridge state machines. Its 5V CMOS outputs drive legacy ISA, VME, and PC/104 bus segments directly without external buffers in many designs. The 25ns propagation delay satisfies the arbitration response time of 8 MHz and 10 MHz bus architectures commonly found in industrial single-board computers. Engineers integrating EP610ILC-25 into bus bridges should ensure bus hold times exceed 5 ns to avoid metastability at the EP610's registered outputs.
Recommended
Industrial 5V State Machines
The EP610ILC-25 fits industrial 5V state machines because its registered macrocell outputs implement Mealy/Moore FSMs with deterministic 25ns state transitions, supporting 40 MHz internal fMAX. Industrial control boards using 5V PLC backplanes often require electrically erasable PLDs for field upgrades, and the EP610ILC-25's in-system reprogrammability avoids the UV-erase cycle needed by older EPROM-based EPLDs. The commercial 0C to +70C temperature range covers most factory-floor enclosures but not outdoor deployments, where industrial-grade variants or MAX II/MAX V alternatives should be considered. The 28-pin PLCC socket remains serviceable for field replacement.
Recommended
Education and Lab Logic Design Platform
The EP610ILC-25 is well suited to education and lab logic design platforms because it provides a low-density, programmable canvas where students can implement counters, decoders, and small state machines in hardware description languages via MAX+PLUS II. The 28-pin PLCC fits standard breadboard adapters and laboratory trainers with through-hole-friendly socket options. Its 25ns tPD and 40 MHz fMAX comfortably demonstrate timing concepts including setup/hold, propagation delay, and clock-to-output without requiring high-speed measurement equipment. Educators should pair the EP610ILC-25 with curriculum covering both PAL/GAL heritage and modern CPLD/FPGA migration paths.
Recommended
Retro Computing and Hobbyist Projects
The EP610ILC-25 fits retro computing and hobbyist projects because it replicates the programmable-logic-on-5V-rail design pattern used in 1980s and 1990s computers, enabling accurate restorations of vintage motherboards and expansion cards. Hobbyists rebuilding 80C186 or 80C51-based systems often need an authentic EPLD for original-equipment chip-select logic, and the EP610ILC-25 in 28-pin PLCC matches the original through-hole socket footprint. Compared to modern MAX II CPLDs, the EP610ILC-25 preserves the heritage 5V-only signaling and the legacy AHDL/MAX+PLUS II programming flow familiar to retro computing enthusiasts. Sockets are still available through electronics surplus channels.
Recommended
Recommended Products Summary
Engineering reference data for EP610ILC-25 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | EP610ILC-10 | EP610DC-25 | EP610DC-30 | EP610DC-35 | EP610DC-15 | EP610DC-20 |
|---|---|---|---|---|---|---|---|
| Brand | Altera | Altera | Altera | Altera | Altera | Altera | Altera |
| Package | 28-pin PLCC | 28-pin PLCC - same | 28-pin PLCC - same | 28-pin PLCC - same | 28-pin PLCC - same | 28-pin PLCC - same | 28-pin PLCC - same |
| Macrocells | 16 | 16 | 16 | 16 | 16 | 16 | 16 |
| Product Terms | 160 | 160 | 160 | 160 | 160 | 160 | 160 |
| Pin-to-Pin Delay (tPD) | 25 ns | 10 ns (faster) | 25 ns | 30 ns | 35 ns | 15 ns (faster) | 20 ns (faster) |
| Supply Voltage | 4.75 V to 5.25 V | 4.75 V to 5.25 V | 4.75 V to 5.25 V | 4.75 V to 5.25 V | 4.75 V to 5.25 V | 4.75 V to 5.25 V | 4.75 V to 5.25 V |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete |
| Total I/O Pins | 20 (16 I/O + 4 dedicated inputs) | 20 (16 I/O + 4 dedicated inputs) | 20 (16 I/O + 4 dedicated inputs) | 20 (16 I/O + 4 dedicated inputs) | 20 (16 I/O + 4 dedicated inputs) | 20 (16 I/O + 4 dedicated inputs) | 20 (16 I/O + 4 dedicated inputs) |
| Operating Temperature | 0 C to +70 C | 0 C to +70 C | 0 C to +70 C | 0 C to +70 C | 0 C to +70 C | 0 C to +70 C | 0 C to +70 C |
Key Differentiators
- Mid-range speed grade with 25ns tPD and 40 MHz fMAX for legacy 5V timing budgets (vs EP610ILC-10)
- Electrically erasable for in-system reprogramming without UV erasure (vs PALCE16V8 (one-time programmable))
- 16 macrocells with 160 product terms in a single 28-pin PLCC (vs Discrete 74LS138 + 74LS151 decoders)
- 28-pin PLCC package with broad socket availability (vs 28-pin DIP Classic EPLD variants (EP610DC-25 etc.))
Design Notes
The EP610ILC-25 operates from a single 5V supply (4.75V to 5.25V) and is NOT 3.3V tolerant. Decouple VCC with a 0.1 uF ceramic capacitor placed within 5 mm of the PLCC-28 VCC pin (pin 8) and a bulk 10 uF tantalum or aluminum polymer capacitor on the same supply rail. The Classic EPLD family has switching currents in the 20 mA to 40 mA range during programming and high-fMAX operation, so a low-ESR bulk cap is recommended. Do not power the EP610ILC-25 from a 3.3V rail without a 5V boost converter or charge pump, as logic-high thresholds (VIH min = 2.0V) may not be reliably met at 3.3V CMOS logic levels.
Place a PLCC-28 socket (e.g., 3M 8400-series or equivalent) on the PCB to allow field replacement, since EP610ILC-25 is obsolete and only available from obsolete-stock distributors with multi-week lead times. Route all I/O and dedicated-input signals with 50 ohm controlled impedance if the design runs near 40 MHz fMAX to avoid ringing on bidirectional I/O pins. Keep the socket pin 1 indicator clear and unambiguous; PLCC-28 pin numbering is counter-clockwise from pin 1 (top-left when viewed from the top with the chamfer at top-left). Add a test-point cluster on all 4 dedicated inputs and at least 4 I/O pins for logic-analyzer debugging.
Estimated: with 16 macrocells driving 16 I/O pins at 5V CMOS into 50 pF loads, each output can sink/source approximately 8 mA DC, but total package dissipation should not exceed 500 mW. Avoid driving large fanouts (more than 8 LS-TTL loads) directly from a single I/O pin; buffer with 74LS244 or 74ACT244 if necessary. Do not mix 5V EP610ILC-25 outputs with 3.3V devices on the same bus without level translation, since VOL max of 0.4V at 8 mA still exceeds 3.3V CMOS VIL max of 0.8V but VOH min of 2.4V at 4 mA can damage 3.3V inputs. The Classic EPLD's macrocell flip-flops do NOT have JTAG boundary-scan, so plan board-level test access separately.
Compliance Information
Compliance information not present in verified distributor data; the EP610 family is a legacy 5V part predating RoHS/REACH standardization. Original Altera Classic EPLD datasheets typically did not include RoHS/REACH declarations. The PLCC-28 package uses tin-lead (SnPb) or lead-free (matte tin) finishes depending on date code.
