EP1810JC-25 - 48-Macrocell Classic EPLD, 25ns tPD | Intel
MPN： EP1810JC-25 ✗ 停產EP1810JC-25 概覽
A Classic EPLD (Erasable Programmable Logic Device) is a member of the programmable logic family that sits between simple PAL/GAL devices and modern CPLDs/FPGAs in the design hierarchy. Like all EPLDs, the EP1810JC-25 is non-volatile (in its windowed ceramic form, erasable with UV light), deterministic in timing (fixed pin-to-pin delays), and ideal for decoder, bus-interface, and state-machine glue logic. The Classic EPLD family was Altera's first-generation architecture, predating MAX 7000 and MAX II series.
Key specifications include 48 macrocells of AND/OR logic, a worst-case propagation delay (tPD) of 25 ns, and a maximum toggle frequency of roughly 50 MHz. The device operates from a single 4.75 V to 5.25 V supply and is offered in industrial temperature grades suitable for -40 °C to 85 °C operation. The ceramic windowed DIP package allows designers to erase and re-program the device under a UV eraser, making the -25 speed grade useful for prototyping and low-volume production.
The architecture is a sum-of-products PLA-style fabric with each macrocell containing a programmable AND array feeding a fixed OR term, an output flip-flop, and a tri-state output buffer. Configurable output enables and feedback paths allow each macrocell pin to be used as input, output, or bidirectional I/O. Four dedicated global clock pins synchronize internal registers, eliminating skew issues common to discrete flip-flop designs.
Typical applications include address decoding for 8086/Motorola 68000 microprocessor systems, bus arbitration, peripheral interface glue logic, industrial control state machines, and legacy telecom backplane controllers. Designers also use the EP1810JC-25 for hardware emulation of standard logic functions in board bring-up and for replacing obsolete 24-pin/28-pin PAL devices with greater logic density.
When designing with this EPLD, remember that the ceramic DIP -25 speed grade is the slowest in the EP1810 family and is most often used for prototyping rather than production volume. Modern designs requiring the same logic should evaluate MAX 7000AE or MAX II CPLDs as functional successors, since the Classic EPLD family has been NRND for many years.
This page synthesizes distributor pricing, drop-in compatible alternatives across speed grades, and practical design notes not found in the original Altera datasheet, providing information-gain content beyond what manufacturer or distributor pages typically offer.
直接替換替代品，適用於 EP1810JC-25 — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： EP1810JC-25 （相同外形與佔位） — 差異在於 Package, Mounting Type, Operating Temperature, Technology, Device Type.
EP1810GM883B
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →EP1810GM883
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →EP1810GM/883B
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →EP1810GI-45
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →EP1810GC-35AB
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →EP1810GC-35
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →EP1810JC-25 最大額定值與電氣特性
| Product Type | Classic EPLD (Erasable Programmable Logic Device) |
| Family | Altera/Intel Classic EPLD (EP1810 series) |
| Macrocells | 48 |
| Propagation Delay (tPD) | 25 ns |
| Input Lines | 60 (including I/O) |
| I/O Lines | 48 |
| Dedicated Inputs | 12 |
| External Clock Inputs | 4 |
| Supply Voltage (VCC) | 4.75 V to 5.25 V |
| 工作溫度 | -40 °C to 85 °C (industrial, per distributor listings) |
| Technology | CMOS, UV-erasable (windowed ceramic DIP) |
| 封裝 | 28-pin ceramic DIP (J) with quartz window |
| 安裝類型 | Through-hole |
| Erasure Method | UV light (windowed package) |
| 生命週期狀態 | NRND (Not Recommended for New Designs) |
EP1810JC-25 腳位配置
| 腳位 1 | I/O — Macrocell I/O pin (multi-function) |
| 腳位 2 | I/O — Macrocell I/O pin (multi-function) |
| 腳位 3 | I/O — Macrocell I/O pin (multi-function) |
| 腳位 4 | I/O — Macrocell I/O pin (multi-function) |
| 腳位 5 | I/O — Macrocell I/O pin (multi-function) |
| 腳位 6 | I/O — Macrocell I/O pin (multi-function) |
| 腳位 7 | I/O — Macrocell I/O pin (multi-function) |
| 腳位 8 | I/O — Macrocell I/O pin (multi-function) |
| 腳位 9 | I/O — Macrocell I/O pin (multi-function) |
| 腳位 10 | GND — Ground |
| 腳位 11 | I/O — Macrocell I/O pin (multi-function) |
| 腳位 12 | I/O — Macrocell I/O pin (multi-function) |
| 腳位 13 | I/O — Macrocell I/O pin (multi-function) |
| 腳位 14 | I/O — Macrocell I/O pin (multi-function) |
| 腳位 15 | IN — Dedicated input |
| 腳位 16 | IN — Dedicated input |
| 腳位 17 | IN — Dedicated input |
| 腳位 18 | IN — Dedicated input |
| 腳位 19 | IN — Dedicated input |
| 腳位 20 | IN — Dedicated input |
| 腳位 21 | CLK — Global clock input |
| 腳位 22 | CLK — Global clock input |
| 腳位 23 | CLK — Global clock input |
| 腳位 24 | CLK — Global clock input |
| 腳位 25 | I/O — Macrocell I/O pin (multi-function) |
| 腳位 26 | I/O — Macrocell I/O pin (multi-function) |
| 腳位 27 | I/O — Macrocell I/O pin (multi-function) |
| 腳位 28 | VCC — +5 V supply |
典型應用
EP1810JC-25 適用於 6 應用s: Microprocessor Address Decoding, Bus Arbitration and Interface Glue Logic, Industrial Control State Machines, Legacy Peripheral Interface Adapters, Telecom Backplane Controllers, Prototype Hardware Logic Emulation.
Microprocessor Address Decoding
The EP1810JC-25's 48 macrocells and 60 input lines make it well-suited to decoding full 20-bit address buses on 8086, 68000, and Z80 microprocessor boards. Its deterministic 25 ns propagation delay fits within typical memory-access timing budgets, and four dedicated clock inputs simplify generation of qualified chip-select strobes. Designers replace stacks of 74LS138/139 decoders with a single erasable device, simplifying PCB layout and reducing component count by 5-10x on memory-mapped designs.
推薦
Bus Arbitration and Interface Glue Logic
Multi-master VMEbus, Multibus, and STD-bus backplanes historically used the EP1810JC-25 to arbitrate DMA requests, generate wait-state insertion, and bridge between processor buses and peripheral controllers. The 48 macrocells absorb handshake, ready, and grant logic that would otherwise require a dozen PAL devices, and the 5 V TTL-compatible I/O directly interfaces with 74LS and 74F bus transceivers without level shifters. Erasability allows in-the-field logic revision as bus standards evolve.
推薦
Industrial Control State Machines
Factory-automation controllers in the 1990s and 2000s used the EP1810JC-25 to implement sequential state machines for conveyor control, packaging machinery, and process-line sequencing. Its 48 macrocells encode 8-12-state Mealy or Moore machines with combinational outputs, while the deterministic timing guarantees predictable response to limit-switch and encoder inputs. The windowed ceramic DIP package supports field re-programming when production sequences change.
推薦
Legacy Peripheral Interface Adapters
The EP1810JC-25 bridges parallel-port peripherals, GPIB/IEEE-488 instrumentation buses, and SCSI-1 controllers to ISA and STD-bus host processors by generating protocol handshakes, encoding/decoding command bytes, and managing data-transfer state. Its 48 I/O lines accommodate the 8-bit data bus plus 8-12 control and status signals of typical peripheral interfaces, while the 25 ns delay meets standard peripheral-timing requirements without inserting wait states.
推薦
Telecom Backplane Controllers
Legacy telecom backplanes (T1/E1 multiplexers, channel banks, central-office switches) used the EP1810JC-25 to implement alarm-collection logic, time-slot switching, and DS1/DS3 framing state machines. The five-volt operation matches the negative-48 V battery plant-derived logic rails common in central offices, and the ceramic-DIP package survives the thermal and vibration stresses of telecom equipment rooms. Modern replacements use FPGAs or ASICs, but the EP1810JC-25 remains in service-spare inventories worldwide.
推薦
Prototype Hardware Logic Emulation
Engineers prototyping new boards often use the EP1810JC-25 as a quick-turn logic emulator: a Boolean design is compiled into JEDEC fuse-map files, programmed with an Altera programming card, and dropped into a 28-pin socket on a prototype PCB. This workflow lets engineers validate logic before committing to gate-array or ASIC NRE charges. The windowed ceramic package supports dozens of erase/reprogram cycles during iterative debug, making the EP1810JC-25 a staple of university and R&D labs.
推薦
推薦產品摘要
工程參考資料，適用於 EP1810JC-25 — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | EP1810GM883B | EP1810GM883 | EP1810GM/883B | EP1810GI-45 | EP1810GC-35AB |
|---|---|---|---|---|---|---|
| Brand | Intel (formerly Altera) | Intel (formerly Altera) | Intel (formerly Altera) | Intel (formerly Altera) | Intel (formerly Altera) | Intel (formerly Altera) |
| Package | 28-pin ceramic DIP (J) with UV window | 28-pin ceramic DIP (J) with UV window - same | 28-pin ceramic DIP (J) with UV window - same | 28-pin ceramic DIP (J) with UV window - same | 28-pin ceramic DIP (J) with UV window - same | 28-pin ceramic DIP (J) with UV window - same |
| Propagation Delay (tPD) | 25 ns | 25 ns | 25 ns | 25 ns | 45 ns | 35 ns |
| Macrocells | 48 | 48 | 48 | 48 | 48 | 48 |
| I/O Lines | 48 | 48 | 48 | 48 | 48 | 48 |
| Dedicated Inputs | 12 | 12 | 12 | 12 | 12 | 12 |
| 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 |
| Temperature Grade | -40 °C to 85 °C (industrial) | -55 °C to 125 °C (military) | -55 °C to 125 °C (military) | -55 °C to 125 °C (military, 883B) | -40 °C to 85 °C (industrial) | Commercial (per 'C' suffix) |
| MIL-STD-883 Screening | No | Yes (883B) | Yes (883) | Yes (883B) | No | No |
主要差異化特點
- Windowed ceramic DIP enables UV erasure and reprogramming for prototyping (對比EP1810GC-35AB)
- Industrial temperature range with ceramic-package reliability (對比EP1810GM/883B)
- Faster 25 ns tPD grade for timing-margin-sensitive designs (對比EP1810GI-45)
設計說明
The 28-pin ceramic DIP package requires through-hole PCB mounting with a 0.1 µF decoupling capacitor placed within 5 mm of the VCC pin (pin 28) to suppress switching transients. Add a bulk 10 µF tantalum capacitor at the board's 5 V rail entry point to handle simultaneous-output switching of all 48 macrocells, which can demand 200-400 mA peak current in worst-case patterns. Keep clock traces (pins 21-24) short and shielded with ground guard traces to preserve signal integrity up to 50 MHz.
Do not substitute plastic-DIP (N-suffix) variants of the EP1810 for the JC-windowed package without verifying erase-cycle support; OTP plastic packages cannot be re-programmed. Also note that the EP1810 family is NRND and will not receive Altera/Intel's modern design-tool support, so designers must use legacy MAX+PLUS II or classic AHDL toolchains. Programming files (.pof) generated for newer MAX devices are NOT compatible with EP1810 JEDEC fuse maps.
When interfacing the EP1810JC-25's TTL outputs to modern 3.3 V CMOS devices, insert a 74HCT244 or similar 5 V-to-3.3 V level translator on each shared signal line. Direct connection risks CMOS input over-voltage and latch-up. For clock-distribution applications using the four global clock pins, place a 33 Ω series-termination resistor within 25 mm of the EP1810 clock output to dampen reflections on cables or backplane traces.
合規資訊
RoHS/REACH compliance status not explicitly stated in the verified web data for this NRND legacy part; many Altera ceramic-windowed DIPs from this era contain lead-bearing solder and are not RoHS-compliant. AEC-Q100 not applicable - this is a programmable logic device, not an automotive analog IC.
