EP1810LC-25 - Classic EPLD, 48 Macrocells, 25ns | Altera
Référence : EP1810LC-25 ✗ Fin de vie| Qté | Prix unitaire | 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 Présentation
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.
Alternatives de remplacement direct pour EP1810LC-25 — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec EP1810LC-25 (même facteur de forme et même empreinte) — différant par Package, Technology, Mounting Type, Operating Temperature, Supply Voltage (VCC).
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
EP1810LC-20
✅ Remplacement direct✓ En stock
$7.85 / unité
Voir la fiche technique →EP1810LC-35
✅ Remplacement direct✓ En stock
$49.2 / unité
Voir la fiche technique →EP1810LC-45
✅ Remplacement direct✓ En stock
$49.9 / unité
Voir la fiche technique →EP1810LC-25T
✅ Remplacement direct✓ En stock
$8.4 / unité
Voir la fiche technique →EP1810JI-35
✅ Remplacement direct✓ En stock
$18.6 / unité
Voir la fiche technique →EP1810LC-25 Valeurs maximales et caractéristiques électriques
| 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) |
| Boîtier | 68-pin JLCC (J-leaded ceramic chip carrier) |
| Package Code | LC = 68-pin JLCC |
| Type de montage | Surface Mount |
| Technology | CMOS EPLD (erasable programmable logic device) |
| Programmable Interconnect | Global + Local buses |
| Programming Method | Altera Classic programmer + MAX+PLUS II legacy flow |
| Statut du cycle de vie | Obsolete (legacy Altera Classic family) |
Configuration des broches de EP1810LC-25
| Broche 1 | I/O — Bidirectional I/O pin (group A) |
| Broche 2 | I/O — Bidirectional I/O pin (group A) |
| Broche 3 | I/O — Bidirectional I/O pin (group A) |
| Broche 4 | I/O — Bidirectional I/O pin (group A) |
| Broche 5 | I/O — Bidirectional I/O pin (group A) |
| Broche 6 | I/O — Bidirectional I/O pin (group A) |
| Broche 7 | I/O — Bidirectional I/O pin (group A) |
| Broche 8 | I/O — Bidirectional I/O pin (group A) |
| Broche 9 | I/O — Bidirectional I/O pin (group A) |
| Broche 10 | I/O — Bidirectional I/O pin (group A) |
| Broche 11 | GND — Ground |
| Broche 12 | I/O — Bidirectional I/O pin (group A) |
| Broche 13 | DED_IN — Dedicated input pin |
| Broche 14 | DED_IN — Dedicated input pin |
| Broche 15 | DED_IN — Dedicated input pin |
| Broche 16 | DED_IN — Dedicated input pin |
| Broche 17 | DED_IN — Dedicated input pin |
| Broche 18 | DED_IN — Dedicated input pin |
| Broche 19 | DED_IN — Dedicated input pin |
| Broche 20 | DED_IN — Dedicated input pin |
| Broche 21 | DED_IN — Dedicated input pin |
| Broche 22 | DED_IN — Dedicated input pin |
| Broche 23 | DED_IN — Dedicated input pin |
| Broche 24 | DED_IN — Dedicated input pin |
| Broche 25 | CLK — External clock input 1 |
| Broche 26 | CLK — External clock input 2 |
| Broche 27 | CLK — External clock input 3 |
| Broche 28 | CLK — External clock input 4 |
| Broche 29 | I/O — Bidirectional I/O pin (group B) |
| Broche 30 | I/O — Bidirectional I/O pin (group B) |
| Broche 31 | I/O — Bidirectional I/O pin (group B) |
| Broche 32 | I/O — Bidirectional I/O pin (group B) |
| Broche 33 | I/O — Bidirectional I/O pin (group B) |
| Broche 34 | I/O — Bidirectional I/O pin (group B) |
| Broche 35 | I/O — Bidirectional I/O pin (group B) |
| Broche 36 | I/O — Bidirectional I/O pin (group B) |
| Broche 37 | I/O — Bidirectional I/O pin (group B) |
| Broche 38 | I/O — Bidirectional I/O pin (group B) |
| Broche 39 | VCC — 5 V power supply |
| Broche 40 | I/O — Bidirectional I/O pin (group B) |
| Broche 41 | I/O — Bidirectional I/O pin (group C) |
| Broche 42 | I/O — Bidirectional I/O pin (group C) |
| Broche 43 | I/O — Bidirectional I/O pin (group C) |
| Broche 44 | I/O — Bidirectional I/O pin (group C) |
| Broche 45 | I/O — Bidirectional I/O pin (group C) |
| Broche 46 | I/O — Bidirectional I/O pin (group C) |
| Broche 47 | I/O — Bidirectional I/O pin (group C) |
| Broche 48 | I/O — Bidirectional I/O pin (group C) |
| Broche 49 | I/O — Bidirectional I/O pin (group C) |
| Broche 50 | I/O — Bidirectional I/O pin (group C) |
| Broche 51 | GND — Ground |
| Broche 52 | I/O — Bidirectional I/O pin (group C) |
| Broche 53 | I/O — Bidirectional I/O pin (group D) |
| Broche 54 | I/O — Bidirectional I/O pin (group D) |
| Broche 55 | I/O — Bidirectional I/O pin (group D) |
| Broche 56 | I/O — Bidirectional I/O pin (group D) |
| Broche 57 | I/O — Bidirectional I/O pin (group D) |
| Broche 58 | I/O — Bidirectional I/O pin (group D) |
| Broche 59 | I/O — Bidirectional I/O pin (group D) |
| Broche 60 | I/O — Bidirectional I/O pin (group D) |
| Broche 61 | I/O — Bidirectional I/O pin (group D) |
| Broche 62 | I/O — Bidirectional I/O pin (group D) |
| Broche 63 | VCC — 5 V power supply |
| Broche 64 | I/O — Bidirectional I/O pin (group D) |
| Broche 65 | I/O — Bidirectional I/O pin (group A) |
| Broche 66 | I/O — Bidirectional I/O pin (group A) |
| Broche 67 | I/O — Bidirectional I/O pin (group A) |
| Broche 68 | I/O — Bidirectional I/O pin (group A) |
Applications typiques
EP1810LC-25 convient pour 6 applications: 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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour EP1810LC-25 — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | 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 |
Principaux différenciateurs
- 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)
Notes de conception
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.
Informations de conformité
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).
