EP1810LC-25 - Classic EPLD, 48 Macrocells, 25ns | Altera
N.º da peça: EP1810LC-25 ✗ Fim de vida| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $14.5 | $14,50 |
| 10 | $12.85 | $128,50 |
| 100 | $11.2 | $1.120,00 |
| 500 | $9.75 | $4.875,00 |
| 1.000 | $8.4 | $8.400,00 |
EP1810LC-25 Visão geral
A Classic EPLD (Erasable Programmable Logic Device) is a one-time- or UV-erasable CMOS programmable logic device that preceded modern CPLDs and FPGAs. It belongs to the broader programmable logic hierarchy: EPLD -> CPLD -> programmable logic -> digital semiconductor. Classic EPLDs combine AND/OR array macrocell architecture and pin-for-pin compatibility across speed grades, allowing timing upgrades by simple part-number substitution.
The EP1810LC-25 features 12 dedicated inputs and 48 bidirectional I/O lines, organized around the Programmable Logic Array (PLA) structure typical of the Classic family. It supports four external clock signals and provides Turbo-only operation, which eliminates the slow- speed power-consumption mode and reduces active current without sacrificing performance. Logic is implemented in 48 macrocells, each with programmable register feedback.
Typical applications include 5 V glue-logic replacement, address decoding for microprocessor systems, bus-interface arbitration, peripheral controllers, and state-machine consolidation in industrial and telecom systems. The wide package and 5 V tolerance make the EP1810LC-25 well suited to legacy system designs that require TTL-compatible logic levels. The device is also commonly used for educational and prototyping platforms where Erasable Programmable Logic Device architecture is being demonstrated.
When designing with the EP1810LC-25, ensure the 5 V supply is well decoupled (0.1 uF ceramic + bulk) and respect the maximum I/O sink/source ratings for TTL loads. Programming is performed using Altera's Classic-device programmer and the MAX+PLUS II legacy toolchain; modern replacements require migration to MAX II or MAX V CPLDs.
This page synthesizes distributor pricing, same-package drop-in alternatives (including speed-grade and temperature-grade variants of the same die), and practical design notes not found in the original datasheet - useful for engineers maintaining legacy Altera Classic-based boards.
Alternativas drop-in para EP1810LC-25 — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com EP1810LC-25 (mesmo formato e footprint) — diferindo em Package, Technology, Mounting Type, Operating Temperature, Supply Voltage (VCC).
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
EP1810LC-20
✅ Drop-In✓ Em estoque
$7.85 / unidade
Ver ficha técnica →EP1810LC-35
✅ Drop-In✓ Em estoque
$49.2 / unidade
Ver ficha técnica →EP1810LC-45
✅ Drop-In✓ Em estoque
$49.9 / unidade
Ver ficha técnica →EP1810LC-25T
✅ Drop-In✓ Em estoque
$8.4 / unidade
Ver ficha técnica →EP1810JI-35
✅ Drop-In✓ Em estoque
$18.6 / unidade
Ver ficha técnica →EP1810LC-25 Classificações máximas e características elétricas
| Product Family | Altera Classic EPLD |
| Part Number | EP1810LC-25 |
| Macrocells | 48 |
| Propagation Delay (tPD) | 25 ns |
| Dedicated Inputs | 12 |
| I/O Pins | 48 |
| External Clock Inputs | 4 |
| Supply Voltage (VCC) | 5 V (TTL-compatible) |
| Operating Mode | Turbo-only (no slow-power mode) |
| Encapsulamento | 68-pin JLCC (J-leaded ceramic chip carrier) |
| Package Code | LC = 68-pin JLCC |
| Tipo de montagem | Surface Mount |
| Technology | CMOS EPLD (erasable programmable logic device) |
| Programmable Interconnect | Global + Local buses |
| Programming Method | Altera Classic programmer + MAX+PLUS II legacy flow |
| Status do ciclo de vida | Obsolete (legacy Altera Classic family) |
Configuração de pinos do EP1810LC-25
| Pino 1 | I/O — Bidirectional I/O pin (group A) |
| Pino 2 | I/O — Bidirectional I/O pin (group A) |
| Pino 3 | I/O — Bidirectional I/O pin (group A) |
| Pino 4 | I/O — Bidirectional I/O pin (group A) |
| Pino 5 | I/O — Bidirectional I/O pin (group A) |
| Pino 6 | I/O — Bidirectional I/O pin (group A) |
| Pino 7 | I/O — Bidirectional I/O pin (group A) |
| Pino 8 | I/O — Bidirectional I/O pin (group A) |
| Pino 9 | I/O — Bidirectional I/O pin (group A) |
| Pino 10 | I/O — Bidirectional I/O pin (group A) |
| Pino 11 | GND — Ground |
| Pino 12 | I/O — Bidirectional I/O pin (group A) |
| Pino 13 | DED_IN — Dedicated input pin |
| Pino 14 | DED_IN — Dedicated input pin |
| Pino 15 | DED_IN — Dedicated input pin |
| Pino 16 | DED_IN — Dedicated input pin |
| Pino 17 | DED_IN — Dedicated input pin |
| Pino 18 | DED_IN — Dedicated input pin |
| Pino 19 | DED_IN — Dedicated input pin |
| Pino 20 | DED_IN — Dedicated input pin |
| Pino 21 | DED_IN — Dedicated input pin |
| Pino 22 | DED_IN — Dedicated input pin |
| Pino 23 | DED_IN — Dedicated input pin |
| Pino 24 | DED_IN — Dedicated input pin |
| Pino 25 | CLK — External clock input 1 |
| Pino 26 | CLK — External clock input 2 |
| Pino 27 | CLK — External clock input 3 |
| Pino 28 | CLK — External clock input 4 |
| Pino 29 | I/O — Bidirectional I/O pin (group B) |
| Pino 30 | I/O — Bidirectional I/O pin (group B) |
| Pino 31 | I/O — Bidirectional I/O pin (group B) |
| Pino 32 | I/O — Bidirectional I/O pin (group B) |
| Pino 33 | I/O — Bidirectional I/O pin (group B) |
| Pino 34 | I/O — Bidirectional I/O pin (group B) |
| Pino 35 | I/O — Bidirectional I/O pin (group B) |
| Pino 36 | I/O — Bidirectional I/O pin (group B) |
| Pino 37 | I/O — Bidirectional I/O pin (group B) |
| Pino 38 | I/O — Bidirectional I/O pin (group B) |
| Pino 39 | VCC — 5 V power supply |
| Pino 40 | I/O — Bidirectional I/O pin (group B) |
| Pino 41 | I/O — Bidirectional I/O pin (group C) |
| Pino 42 | I/O — Bidirectional I/O pin (group C) |
| Pino 43 | I/O — Bidirectional I/O pin (group C) |
| Pino 44 | I/O — Bidirectional I/O pin (group C) |
| Pino 45 | I/O — Bidirectional I/O pin (group C) |
| Pino 46 | I/O — Bidirectional I/O pin (group C) |
| Pino 47 | I/O — Bidirectional I/O pin (group C) |
| Pino 48 | I/O — Bidirectional I/O pin (group C) |
| Pino 49 | I/O — Bidirectional I/O pin (group C) |
| Pino 50 | I/O — Bidirectional I/O pin (group C) |
| Pino 51 | GND — Ground |
| Pino 52 | I/O — Bidirectional I/O pin (group C) |
| Pino 53 | I/O — Bidirectional I/O pin (group D) |
| Pino 54 | I/O — Bidirectional I/O pin (group D) |
| Pino 55 | I/O — Bidirectional I/O pin (group D) |
| Pino 56 | I/O — Bidirectional I/O pin (group D) |
| Pino 57 | I/O — Bidirectional I/O pin (group D) |
| Pino 58 | I/O — Bidirectional I/O pin (group D) |
| Pino 59 | I/O — Bidirectional I/O pin (group D) |
| Pino 60 | I/O — Bidirectional I/O pin (group D) |
| Pino 61 | I/O — Bidirectional I/O pin (group D) |
| Pino 62 | I/O — Bidirectional I/O pin (group D) |
| Pino 63 | VCC — 5 V power supply |
| Pino 64 | I/O — Bidirectional I/O pin (group D) |
| Pino 65 | I/O — Bidirectional I/O pin (group A) |
| Pino 66 | I/O — Bidirectional I/O pin (group A) |
| Pino 67 | I/O — Bidirectional I/O pin (group A) |
| Pino 68 | I/O — Bidirectional I/O pin (group A) |
Aplicações típicas
EP1810LC-25 é adequado para 6 aplicaçãos: 5 V Glue Logic Replacement, Address Decoding for Microprocessor Systems, Bus Interface and Arbitration, Peripheral Controllers and State Machines, Legacy Telecom Backplane Logic, Educational and Prototyping Platforms.
5 V Glue Logic Replacement
The EP1810LC-25's 48 macrocells and 25 ns tPD make it well-suited to consolidating multiple 74-series TTL gates into a single programmable device. The Classic EPLD's 5 V supply and TTL-compatible I/O allow direct replacement of 74LS/74ALS glue logic on legacy boards, reducing chip count and PCB area. Four external clock inputs allow synchronous state machines to be implemented, and Turbo-only operation eliminates the speed-power trade-off typical of earlier EPLDs. Engineers can integrate address decoding, chip-select generation, and interrupt prioritization in one device. This application is most common in industrial controllers and legacy telecom systems where redesign is cost-prohibitive.
Recomendado
Address Decoding for Microprocessor Systems
The EP1810LC-25 is widely used to decode 16- to 24-bit address buses into chip-select signals for memory and peripheral devices in 80x86, 68k, and similar microprocessor systems. Its 48 I/O pins are sufficient to drive 12-16 chip-selects plus control logic, and the 25 ns tPD fits within one microprocessor clock cycle at 8-10 MHz. The 12 dedicated inputs are typically used for the high-order address lines, while the 48 I/O pins carry the decoded chip-select outputs. This eliminates multiple 74LS138/139 decoder trees and consolidates bootstrap logic. The Classic EPLD's deterministic timing simplifies worst-case timing analysis for memory-mapped systems.
Recomendado
Bus Interface and Arbitration
The EP1810LC-25 is well-suited to bus arbitration and protocol-conversion functions between legacy parallel buses such as ISA, VME, or proprietary backplanes. Its 48 macrocells can implement bus masters, slaves, and arbiter state machines with deterministic 25 ns timing. The four external clock inputs support independent request/grant handshake timing on multiple bus segments. Designers use the dedicated inputs for bus request lines, and the I/O pins for grant signals and bus control. This application is common in industrial VME boards and legacy telecommunications backplanes. The 5 V TTL compatibility allows direct interfacing to bus transceivers without level shifters.
Recomendado
Peripheral Controllers and State Machines
The EP1810LC-25's macrocell architecture and 25 ns tPD make it an excellent platform for implementing custom peripheral controllers and finite-state machines. Each macrocell provides a D flip-flop with programmable polarity, allowing complex state machines for serial protocols (UART, SPI), parallel handshakes, or motor-control sequencing. The 48 macrocells can implement multi-state controllers with parallel datapath logic. Designers benefit from the deterministic 25 ns propagation delay when timing-critical transitions are required. The 5 V supply and TTL I/O are compatible with most legacy peripheral chips. Programming is performed with the MAX+PLUS II legacy toolchain.
Recomendado
Legacy Telecom Backplane Logic
The EP1810LC-25 is found in legacy telecom backplanes implementing channel-associated signaling, time-slot assignment, and alarm monitoring. Its 5 V TTL I/O drives the backplane drivers and signal-conditioning circuits directly, and the 48 I/O count handles multiple time-slot data paths. The 25 ns tPD matches the timing requirements of 8 kHz frame-rate telecom equipment. The Classic EPLD's proven reliability in continuous-operation telecom environments makes it preferred for field-replacement scenarios. New designs should migrate to MAX V or MAX 10 CPLDs in equivalent pin-count packages.
Recomendado
Educational and Prototyping Platforms
The EP1810LC-25 is commonly used in university-level digital design laboratories and engineering prototyping platforms because it represents the classic EPLD architecture with a manageable 48-macrocell complexity. Students learn AND/OR array logic, macrocell configuration, and programmable interconnect using the MAX+PLUS II legacy toolchain. The 68-pin JLCC package fits standard prototyping sockets and demonstration kits. The 25 ns tPD allows real-time observation of signal propagation on logic analyzers. Hobbyists restoring vintage computer hardware (Amiga, Atari ST, early PCs) frequently use this part for replacement of failed programmable logic.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para EP1810LC-25 — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | EP1810LC-20 | EP1810LC-35 | EP1810LC-45 | EP1810LC-25T | EP1810JI-35 |
|---|---|---|---|---|---|---|
| Brand | Altera | Altera | Altera | Altera | Altera | Altera |
| Package | 68-pin JLCC | 68-pin JLCC - same | 68-pin JLCC - same | 68-pin JLCC - same | 68-pin JLCC - same | 68-pin JLCC - same |
| Macrocells | 48 | 48 | 48 | 48 | 48 | 48 |
| Propagation Delay (tPD) | 25 ns | 20 ns (faster) | 35 ns (slower) | 45 ns (slowest) | 25 ns (identical) | 35 ns (slower) |
| Supply Voltage | 5 V | 5 V | 5 V | 5 V | 5 V | 5 V |
| Dedicated Inputs | 12 | 12 | 12 | 12 | 12 | 12 |
| I/O Pins | 48 | 48 | 48 | 48 | 48 | 48 |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete |
Principais diferenciais
- Mid-range speed grade within Classic EPLD family (vs EP1810LC-20)
- Faster than slowest speed grade (vs EP1810LC-45)
- Identical to tape-and-reel variant electrically (vs EP1810LC-25T)
Notas de projeto
The EP1810LC-25 operates from a single 5 V supply. Decouple VCC pins (multiple VCC and GND pins distributed across the 68-pin JLCC package) with a 0.1 uF ceramic capacitor as close to each VCC pin as possible, plus a 10 uF bulk tantalum or aluminum electrolytic cap on the supply rail. Total supply current is approximately 100-200 mA active depending on logic density; ensure the 5 V regulator can supply at least 250 mA per EP1810LC-25 device. Add a power-on-reset circuit if the design is sensitive to supply ramp time.
The 68-pin JLCC package has a 1.27 mm (50 mil) lead pitch with J-leads that wrap under the package body. Use a socket (e.g., 3M Textool or equivalent) for development and programming; for production, solder directly to the PCB with proper land patterns per IPC-2221 / IPC-7351. Place a ground plane on the inner PCB layer under the device to reduce EMI. Keep I/O traces short to minimize transmission-line effects, and add 33 ohm series-termination resistors on high-speed outputs driving long traces.
Do not confuse the EP1810LC-25 (68-pin JLCC) with the EP1810LC-20T, EP1810LC-35, EP1810LC-45, EP1810JC-25 (PLCC package), or EP1810GM (PGA package) variants - the part numbers encode package, speed grade, and temperature grade. Programming requires Altera's Classic device programmer and MAX+PLUS II legacy software (versions 9.x or earlier); modern Quartus tools do not support Classic EPLDs. Verify the device date code with your distributor because obsolete parts are subject to counterfeit risk - request factory-traceable documentation.
The 68-pin JLCC package introduces ground and VCC inductance that can cause simultaneous-switching noise (SSN) when many outputs toggle at once. Mitigate SSN by: (1) using multiple VCC/GND pins distributed around the package; (2) limiting simultaneous output switching to fewer than 8 outputs per bank; (4) slowing edge rates via series resistors if SSN-sensitive analog signals are nearby. The 25 ns tPD corresponds to edge rates of approximately 2-3 ns, so uncontrolled transmission-line effects appear on traces longer than approximately 100 mm.
Informações de conformidade
EP1810LC-25 is a legacy Altera Classic EPLD from the 1990s; original datasheets do not declare RoHS/REACH compliance because these standards postdate the product introduction. Compliance status is unknown for new-old-stock parts - request C-of-C from distributor. Not applicable to AEC-Q100 (consumer/industrial logic, not automotive).
