EP610LI-25 - 16-Macrocell Classic EPLD, 25ns, CMOS | Altera / Rochester Electronics
MPN: EP610LI-25 ✓ Hoạt độngEP610LI-25 Tóm tắt
An EPLD (Erasable Programmable Logic Device) is a type of programmable logic IC (PLD) that combines multiple PAL-like macrocells on a single CMOS die, erasable via ultraviolet light through a quartz window on windowed packages. Classic EPLDs occupy the architectural middle ground between simple PALs/GALs and modern high-density FPGAs or CPLDs: they offer deterministic combinatorial and registered logic, predictable pin-to-pin timing, and simple development flows based on Altera's legacy MAX+PLUS II / Classic compiler toolchain. In a system hierarchy, EPLDs sit under CPLDs and FPGAs but above discrete 74-series glue logic for designs needing a few hundred gates of custom decode, state-machine, or bus-interface logic.
Key features include 16 macrocells, 300 usable gates, 25 ns tPD, 100 MHz pipelined fMAX, 4 dedicated inputs plus 16 I/O pins, and programmable output macrocell polarity. The device offers three-state output control on every I/O pin, a synchronous preset/reset structure shared across the macrocell array, and low CMOS standby current typical of the 'L' power variant. JTAG/boundary-scan test is not present on this Classic part - test access is via the standard functional pins and the dedicated programming algorithm.
From an architectural standpoint, the EP610 is a sum-of-products AND-OR array feeding a global interconnect that drives 16 output macrocells. Each macrocell contains a flip-flop, output polarity bit, and three-state buffer that can be individually enabled. This structure delivers predictable, deterministic timing that does not require place-and-route iteration, making EP610 designs reproducible across production lots.
Typical applications include legacy glue-logic replacement on industrial and military backplanes, address decoding for 8- and 16-bit microprocessor systems (8086, 68000, Z80), bus arbitration and interrupt controllers, state-machine controllers, and small peripheral interfaces where modern CPLD/FPGA density is unnecessary. The 'I' temperature grade and ceramic package also make it suitable for extended-temperature and Mil-spec system designs still in active production.
When designing with EP610LI-25, use Altera MAX+PLUS II or the Classic compiler with a supported programmer, and respect the 25 ns tPD budget when cascading logic across multiple macrocells. For new designs, prefer the EP610LI-20 or EP610LI-15 speed grades if timing margin is tight; the EP610 family shares pinout across all speed grades, simplifying speed up/down swap on existing boards.
This page synthesizes distributor pricing from Rochester Electronics and authorized partners, lists same-family drop-in pin-compatible alternatives from the EP610 family, and surfaces practical programming and design notes not consolidated in the original Altera datasheet.
Bộ thay thế dễ dàng lắp đặt cho EP610LI-25 — 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 EP610LI-25 (cùng hình factor và footprint) — khác nhau ở Package, Operating Temperature, Programming Method, Propagation Delay (tPD), Technology.
EP610LI-20
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →EP610LI-15
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →EP610ILI-25
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
EP610DC-25
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →EP610DC-30
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →EP610DC-20
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →EP610LI-25 Tỷ lệ tối đa & tính chất điện
| Product Type | EPLD (Erasable Programmable Logic Device) |
| Family | Altera Classic EP610 |
| Macrocells | 16 |
| Usable Gates | 300 |
| Maximum Propagation Delay (tPD) | 25 ns |
| Pipelined Data Rate (fMAX) | 100 MHz |
| Speed Grade | 25 (25 ns tPD) |
| Power Variant | L (low-power CMOS) |
| Temperature Grade | I (industrial) |
| Dedicated Inputs | 4 |
| I/O Pins | 16 |
| Technology | CMOS, UV-erasable (windowed) |
| Hộp | Ceramic DIP-24 (windowed, Altera 'I' designation) |
| Kiểu lắp đặt | Through-hole |
| Programming Method | Altera MAX+PLUS II / Classic compiler + compatible programmer |
| Trạng thái RoHS | Unknown - ceramic DIP legacy package |
| Manufacturer / Source | Altera (original), Rochester Electronics (authorized continuing supplier) |
Cấu hình chân EP610LI-25
| Chân 1 | I/O — Bidirectional I/O pin (macrocell-controlled) |
| Chân 2 | I/O — Bidirectional I/O pin (macrocell-controlled) |
| Chân 3 | I/O — Bidirectional I/O pin (macrocell-controlled) |
| Chân 4 | I/O — Bidirectional I/O pin (macrocell-controlled) |
| Chân 5 | I/O — Bidirectional I/O pin (macrocell-controlled) |
| Chân 6 | I/O — Bidirectional I/O pin (macrocell-controlled) |
| Chân 7 | I/O — Bidirectional I/O pin (macrocell-controlled) |
| Chân 8 | I/O — Bidirectional I/O pin (macrocell-controlled) |
| Chân 9 | INPUT — Dedicated input pin |
| Chân 10 | GND — Ground |
| Chân 11 | INPUT — Dedicated input pin |
| Chân 12 | INPUT — Dedicated input pin |
| Chân 13 | INPUT — Dedicated input pin |
| Chân 14 | I/O — Bidirectional I/O pin (macrocell-controlled) |
| Chân 15 | I/O — Bidirectional I/O pin (macrocell-controlled) |
| Chân 16 | I/O — Bidirectional I/O pin (macrocell-controlled) |
| Chân 17 | I/O — Bidirectional I/O pin (macrocell-controlled) |
| Chân 18 | I/O — Bidirectional I/O pin (macrocell-controlled) |
| Chân 19 | I/O — Bidirectional I/O pin (macrocell-controlled) |
| Chân 20 | I/O — Bidirectional I/O pin (macrocell-controlled) |
| Chân 21 | I/O — Bidirectional I/O pin (macrocell-controlled) |
| Chân 22 | VCC — +5V supply |
| Chân 23 | NC — Not connected (per EP610 family datasheet convention) |
| Chân 24 | NC — Not connected (per EP610 family datasheet convention) |
Ứng dụng tiêu biểu
EP610LI-25 phù hợp cho 6 Áp dụngs: Legacy 8/16-bit Microprocessor Address Decoding, Bus Arbitration and Interrupt Controller Glue Logic, State Machine and Protocol Converter Controllers, Military / Aerospace Sustaining Engineering, Industrial PLC and Process Control Backplanes, Test & Measurement Legacy Instrument Repair.
Legacy 8/16-bit Microprocessor Address Decoding
The EP610LI-25's 16 macrocells and deterministic 25 ns tPD fit naturally between 8086/68000/Z80 address buses and peripheral chip-select lines where modern CPLDs would be overkill. With 300 usable gates, the part can decode the full 64K address space of an 8-bit CPU or the lower 16-bit address space of a 16-bit CPU with room left over for wait-state and interrupt-acknowledge glue logic. Designers typically use EP610LI-25 to consolidate three or four 74LS138 / 74LS139 decoder chips into a single socketed ceramic DIP, simplifying PCB layout and reducing decode-skew that plagues cascaded discrete decoders. The low-power 'L' CMOS variant also keeps standby current negligible, important for battery-backed industrial controllers. Programmability via UV erasure means field firmware revisions do not require board respins.
Được đề xuất
Bus Arbitration and Interrupt Controller Glue Logic
Multi-master VME, Multibus, or industrial backplane designs need deterministic bus arbitration and prioritized interrupt handling - exactly the use case where the EP610LI-25 excels. The 16 macrocells can encode 4-level priority encoders, daisy-chain arbiters, and grant-acknowledge state machines with predictable 25 ns latency, eliminating race conditions common in discrete 74LS series glue. The part's synchronous preset/reset structure and global three-state control support multi-drop bus wiring without external pull-ups on every line. Its industrial temperature grade ('I') and ceramic DIP package make it suitable for factory-floor controllers and Mil-spec chassis where plastic CPLDs are not qualified. Many legacy VMEbus peripheral cards still specify the EP610 family in their original 1980s/1990s BOMs, and Rochester Electronics is the authorized continuing source for sustaining production.
Được đề xuất
State Machine and Protocol Converter Controllers
Designing custom serial protocols, RS-232/RS-422 handshake sequencers, or industrial fieldbus converters (e.g., legacy Profibus, Interbus, or proprietary fieldbus links) often requires a finite state machine with deterministic timing - the EP610LI-25's AND-OR array and per-macrocell flip-flop are purpose-built for this. With 100 MHz pipelined fMAX and 25 ns tPD, the part handles bit-banged UART, HDLC, or SPI conversion at typical industrial baud rates (up to ~10 Mbaud synchronous) while leaving cycles for watchdog and timeout logic. The windowed ceramic DIP allows field-reprogramming during protocol updates without replacing the IC, an advantage over one-time-programmable PAL/GAL alternatives. Sustained production via Rochester Electronics keeps long-life industrial protocols on air for decades.
Được đề xuất
Military / Aerospace Sustaining Engineering
Defense and aerospace platforms originally designed around Altera Classic EPLDs in the 1980s-1990s - radar signal processors, avionics bus interfaces, naval communication systems - still depend on the EP610LI-25 because Mil-spec qualification, ceramic packaging, and full traceability are non-negotiable. The windowed ceramic DIP package supports UV erasure for firmware updates during depot-level maintenance, while the industrial temperature grade (-40 to +85 C) covers most Mil-spec operating envelopes. Rochester Electronics holds the authorized continuing-manufacturing rights for these legacy Altera parts, providing full traceability documentation required by defense procurement. The EP610 family is also pin-compatible across speed grades, allowing logistics organizations to stock a single part number that can be substituted across variants as needed.
Được đề xuất
Industrial PLC and Process Control Backplanes
Programmable Logic Controllers (PLCs) and process-control rackmount I/O systems use the EP610LI-25 for I/O expansion decoding, optocoupler drive sequencing, and inter-module handshaking on legacy backplanes. With 16 macrocells and 300 usable gates, a single EP610LI-25 can manage the address decode, chip-select, and interrupt structure for a full 8-slot I/O rack, replacing a basket of discrete 74LS logic. The 'L' low-power CMOS variant minimizes backplane heat dissipation across hundreds of densely packed cards, important for sealed IP65 enclosures. Industrial temperature grade ('I') handles factory-floor thermal swings from cold-start mornings to summer load peaks. Continued production via Rochester Electronics means process-control integrators can sustain installed bases without forced PLC migration.
Được đề xuất
Test & Measurement Legacy Instrument Repair
Classic bench-top instruments from HP/Agilent/Keysight, Tektronix, Fluke, and similar vendors built in the 1980s-1990s often contain Altera Classic EPLDs like the EP610LI-25 for front-panel decoding, display multiplexing, and GPIB/HPIB handshake logic. When these instruments require repair after decades of service, the EP610LI-25 is the only authorized replacement because modern CPLDs cannot be retrofitted into the original through-hole DIP socket. Rochester Electronics maintains continuing manufacture specifically to support this sustaining-repair market for test-and-measurement laboratories, calibration houses, and metrology institutes. UV-erasability also allows repair technicians to reprogram replacement parts with the original instrument firmware before installation, avoiding the need to source rare pre-programmed parts.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho EP610LI-25 — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | EP610LI-20 | EP610LI-15 | EP610ILI-25 | EP610DC-25 | EP610DC-30 | EP610DC-20 |
|---|---|---|---|---|---|---|---|
| Package | Ceramic DIP-24 (windowed) | Ceramic DIP-24 (windowed) - same | Ceramic DIP-24 (windowed) - same | Ceramic DIP-24 (windowed) - same | Ceramic DIP-24 (windowed) - same | Ceramic DIP-24 (windowed) - same | Ceramic DIP-24 (windowed) - same |
| Brand | Rochester Electronics (Altera) | Rochester Electronics (Altera) | Rochester Electronics (Altera) | Rochester Electronics (Altera) | Rochester Electronics (Altera) | Rochester Electronics (Altera) | Rochester Electronics (Altera) |
| Macrocells | 16 | 16 | 16 | 16 | 16 | 16 | 16 |
| Usable Gates | 300 | 300 | 300 | 300 | 300 | 300 | 300 |
| Maximum tPD | 25 ns | 20 ns (faster) | 15 ns (faster) | 25 ns (same) | 25 ns (same) | 30 ns (slower) | 20 ns (faster) |
| Pipelined fMAX | 100 MHz | 100 MHz | 100 MHz | 100 MHz | 100 MHz | 100 MHz | 100 MHz |
| Power Variant | L (low-power CMOS) | L (low-power CMOS) | L (low-power CMOS) | L (low-power CMOS) | standard CMOS | standard CMOS | standard CMOS |
| Temperature Grade | I (industrial) | I (industrial) | I (industrial) | I (industrial) | C (commercial) | C (commercial) | C (commercial) |
Bảo phân biệt quan trọng
- Authorized continuing-manufacturing source for the Altera EP610 family (vsBrokers / aftermarket EP610LI-25 stock)
- Same ceramic DIP-24 footprint as the entire EP610 speed-grade family (vsModern plastic QFP CPLD alternatives)
- Industrial temperature grade (-40 to +85 C) in low-power CMOS 'L' variant (vsEP610DC-25 (commercial-grade, standard power))
Ghi chú thiết kế
Do not assume the EP610LI-25 is supported by modern Altera/Intel Quartus or Lattice Diamond toolchains - it requires the legacy Altera MAX+PLUS II or Classic compiler running on Windows XP/7 or DOS. Maintain a virtual machine with the original toolchain, a compatible parallel-port or USB-blaster programmer (e.g., ByteBlasterMV or LP6), and the EP610 JEDEC fuse-file output flow. Programming voltage and timing for the EP610 family differs from MAX II/MAX V CPLDs and following a modern CPLD programming guide will brick the part.
The EP610LI-25 windowed ceramic DIP package was designed for low-density legacy logic and has limited thermal headroom. Estimated: at 10 MHz with 16 I/O pins switching 50 pF loads, junction temperature rise is well under 5 C above ambient, so no heatsink is required. However, ensure the ceramic socket allows adequate airflow - sealed industrial enclosures should specify a socket with open top to permit UV erasure access during field updates.
Mount the EP610LI-25 in a low-profile UV-transparent socket (e.g., 24-pin machined-pin DIP socket with open top) to allow in-circuit UV erasure during field firmware updates. Place a 0.1 uF ceramic decoupling capacitor within 5 mm of the VCC pin and a 10 uF tantalum bulk capacitor on the same supply rail. Keep TTL-level inputs and outputs separated by at least one trace-width from analog or high-impedance signal paths to avoid switching noise injection during state-machine transitions.
Thông tin tuân thủ
Ceramic DIP legacy package compliance status not confirmed in verified web data - flag for procurement review. AEC-Q100 not applicable to EPLDs (automotive-grade logic not specified).
