FPGA & CPLD
Products (6352)
EP910DM-40 - 24-Macrocell UV EPLD Classic PAL-Type | Altera
The Altera EP910DM-40 is a UV-erasable programmable logic device (EPLD) from the Altera Classic EP910 family, fabricated on advanced CMOS technology and housed in a 40-pin ceramic DIP (Cerdip) package with 40 ns propagation delay. It features 24 macrocells interconnected by a global programmable interconnect bus, 36 dedicated inputs, 24 dedicated outputs, 24 bidirectional I/O lines, and 240 product terms, making it suitable for high-speed, low-power logic integration in glue-logic and state-machine applications. A UV Erasable Programmable Logic Device (EPLD) is a type of programmable logic IC that uses ultraviolet light to erase its configuration before re-programming. EPLDs belong to the broader category of Programmable Logic Devices (PLDs) within the programmable logic semiconductor hierarchy: PLD -> EPLD -> Classic EPLD. The EP910 sits between simpler PAL/GAL devices (typically 8-16 macrocells) and larger CPLDs, providing a balance of logic density and predictable timing. Its PAL-type AND/OR architecture with a global bus provides deterministic pin-to-pin delays, which is why EPLDs remained popular for asynchronous state machines and bus-interface glue logic long after FPGAs became mainstream. Key features include 24 macrocells with user-configurable I/O, a non-volatile UV-erasable configuration memory, 4 dedicated clock inputs supporting two clock domains, and JEDEC-standard fuse-map programming. The EP910DM-40's 40 ns tPD makes it appropriate for control logic running at clock rates up to approximately 20-25 MHz, and its CMOS technology delivers low standby power for always-on systems. Typical applications include address decoding and bus-interface glue logic for microprocessors, asynchronous state machines, custom decoder/replacement logic, and legacy 5V industrial control boards. The DIP-40 ceramic package (windowed Cerdip) allows in-circuit reprogramming via UV erasure, which is valuable for prototyping and field-upgradable equipment. When designing with the EP910DM-40, note that 5V CMOS signal levels are mandatory and that unused I/O pins should be left unconnected or tied per datasheet recommendations. The ceramic DIP-40 (windowed) package retains its UV window for re-erasure, while the plastic OTP variants cannot be re-programmed. This page synthesizes distributor availability, parametric datasheet figures, and Altera EP910 cross-family variant listings that go beyond the standalone EP910 datasheet, helping engineers source and substitute this legacy Classic EPLD part.
EP910DM/883B - Altera Classic EPLD, 24 Macrocells, MIL-883B | Intel / Altera
The Intel / Altera EP910DM/883B is a member of the Altera Classic EPLD family that delivers high-speed, low-power CMOS logic integration in a 24-pin ceramic DIP (Cerdip) package. Fabricated on an advanced CMOS process, this part provides 24 macrocells, 10 dedicated input pins, 12 I/O pins, and a maximum propagation delay on the order of nanoseconds, making it suitable for glue-logic, bus decoding, and state-machine replacement in long-life-cycle military and aerospace programs. Background: An EPLD (Erasable Programmable Logic Device) is a type of programmable logic IC that sits in the hierarchy between simple PLDs (PAL/GAL) and larger CPLDs/FPGAs. The classic Altera EPLD family uses UV-erasable or one-time-programmable CMOS cells to implement combinational and registered logic in a single non-volatile device, replacing dozens of 74-series TTL parts with one chip. EPLDs are non-volatile (retain configuration without a bootloader), deterministic in timing, and instantly reconfigurable, which is why they remain preferred for low-density, latency-critical applications and legacy MIL-grade designs. Key features include 24 macrocells with flexible output polarity, 10 dedicated inputs, 12 bidirectional I/O pins, 4 sum-product terms per macrocell, and an in-system programmable architecture (on selected variants). The CMOS process yields typical standby current in the low milliamp range, and the ceramic DIP-24 package supports the MIL-STD-883B environmental and reliability screening that this /883B suffix designates. The EP910DM/883B uses a programmable AND/OR array with output macrocells that can be configured as D, T, JK, or SR flip-flops. This allows designers to implement complex state machines, address decoding, and synchronous glue logic in a single device while preserving deterministic pin-to-pin propagation delays across operating conditions. Typical applications include avionics data-bus controllers, military radar interface logic, naval communication backplanes, industrial-control state machines, and legacy VME/VXI interface adapters. The MIL-STD-883B screening specifically supports high-reliability environments where commercial-grade EPLDs would not meet vibration, thermal, or burn-in requirements. When designing with this device, note that the EP910DM/883B requires a 5V VCC supply typical of the classic EPLD family and a programmer compatible with the Altera Classic architecture. Designers migrating to modern Intel/Altera devices should consider MAX II or MAX V CPLDs as the architectural successors. This page synthesizes distributor pricing, MIL-grade drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
EP910DM883B - 24-Macrocell CMOS EPLD, 40ns, CDIP-40 | Altera
The Altera EP910DM883B is a 24-macrocell Classic-series Erasable Programmable Logic Device (EPLD) fabricated on advanced CMOS technology, offering 36 inputs, 24 outputs, and 240 product terms in a 40-pin ceramic dual in-line (CDIP-40) through-hole package with MIL-STD-883B processing. It is part of the Altera EP910 family of high-speed, low-power PAL-type logic integration devices. What is an EPLD? An EPLD (Erasable Programmable Logic Device) is a non-volatile programmable logic device that combines the architectural flexibility of a PLD with erasable (UV-erasable) configuration memory. It sits in the taxonomy: programmable logic -> PLD -> EPLD -> CMOS EPLD. EPLDs were widely used before modern FPGAs and CPLDs became dominant, and remain in service today in legacy industrial, military, and aerospace systems where long-life-cycle, pin-compatible replacements are mandatory. Key features include a typical propagation delay of 40 ns (tPD), a maximum clock frequency of 25 MHz, 24 dedicated macrocells connected via a global interconnect bus, and support for both combinational and registered logic. The PAL-type AND-OR-NOT architecture delivers predictable, deterministic timing. The device operates from a single 5 V supply and is rated across the military temperature range of -55 °C to +125 °C thanks to the /883B MIL-STD screening. The EP910DM883B is housed in a hermetic ceramic DIP-40 (CDIP-40) package that provides exceptional reliability in shock, vibration, and thermal cycling environments. The /883B suffix denotes full MIL-STD-883B Class B processing, including burn-in, temperature cycling, and Hermeticity testing. Typical applications include military and aerospace avionics, industrial control logic glue, legacy interface bridging, and pin-compatible replacement of original Altera Classic EPLDs. The wide temperature range and hermetic package make it ideal for downhole, automotive under-hood, and defense electronics. When designing with this part, engineers should provide a 5 V ±5% supply and route the 40 DIP pins to a 0.1 µF bypass network near the supply pin. UV-erase window programming requires a 12.5 V VPP pulse; for in-system reprogramming, consider a flash-based CPLD as a modern alternative. This page synthesizes distributor pricing, parametric comparison with related EP910/E610 family parts, MIL-STD-883B processing notes, and practical design guidance not found in a single manufacturer PDF.
EP910IDC-15 - 450-Gate, 24-Macrocell Classic EPLD | Altera
The Altera EP910IDC-15 is a 450-gate, 24-macrocell Classic-family Erasable Programmable Logic Device (EPLD) in a 40-pin ceramic DIP (CDIP) through-hole package, with a 15 ns commercial-speed grade. It operates from a single 5 V supply and integrates 24 macrocells, 48 flip-flops, and a programmable AND/OR logic array, providing TTL-compatible glue-logic, decoder, state-machine, and bus-interface functions on a single chip. What is a Classic EPLD? An EPLD (Erasable Programmable Logic Device) is a UV-erasable CMOS programmable logic device that preceded modern CPLDs and FPGAs. The Altera Classic family — of which the EP910 is a member — was among the first commercial products to combine macrocell-based logic with on-chip non-volatile (EPROM) configuration. Architecturally, an EPLD sits in the hierarchy: programmable logic -> EPLD -> Classic EPLD -> PLD -> digital IC. Unlike SRAM-based FPGAs, Classic EPLDs retain configuration when powered off and are erased with a UV eraser, enabling rapid design iteration during development. The EP910 also includes on-board logic test circuitry that allows AC specification verification during production test, a feature uncommon in later CPLD families. Key features of the EP910IDC-15 include a 15 ns pin-to-pin propagation delay (tPD), 66.6 MHz maximum flip-flop toggle frequency (fCNT), 24 macrocells arranged in two logic array blocks, and 10 dedicated input pins plus 24 I/O pins. The device supports programmable security-bit protection and is 100% generically tested in windowed packages. According to the Altera Classic Device Family datasheet, the EP910 series was offered in commercial, industrial, and military temperature grades across DIP, PLCC, JLCC, PGA, and SOIC packages. The EP910 architecture uses a sum-of-products AND/OR logic array feeding 24 macrocells, each with a configurable flip-flop. Logic is implemented by programming EPROM cells that drive the AND array; each macrocell can be configured as D, T, JK, or SR flip-flop, or as combinational output. The internal 5 V CMOS EPROM process yields predictable, glitch-free outputs with TTL-compatible input and output thresholds, making the EP910 easy to interface with legacy 5 V logic families such as 74LS, 74HC, and 74F. Typical applications include 5 V TTL bus decoding, address-mapping glue logic for microprocessor systems, state-machine controllers for industrial equipment, replacement of multiple 74LS/74F PAL/GAL devices, and prototyping logic that will later be migrated to a non-erasable (one-time-programmable) pin-compatible EP910 variant. Designers also used the EP910 in telecom interface cards and military/aerospace systems where windowed ceramic packages were preferred for radiation tolerance and field reprogrammability. When designing with the EP910IDC-15, note that the ceramic DIP package has higher thermal mass than plastic but the same electrical footprint as the EP910PC (plastic DIP) and EP910DC variants. The ID suffix indicates the ceramic DIP form factor, and the C-15 suffix indicates commercial temperature range (0C to +70C) with 15 ns tPD. For new designs, consider modern 5 V-tolerant CPLDs in PLCC or TQFP packages with lower power and faster speeds; the EP910IDC-15 is primarily a legacy support and obsolescence-management part. This page synthesizes distributor pricing, drop-in alternatives from the Altera Classic family, and practical design notes not found in the manufacturer datasheet.
EP910IDI-15 - 24-Macrocell Classic EPLD 15ns | Intel / Altera
The Intel / Altera (formerly Altera Corporation) EP910IDI-15 is a member of the Classic EPLD family, a 450-gate CMOS Complex Programmable Logic Device (CPLD) with 24 macrocells, 36 available I/O pins, and a pin-to-pin propagation delay of 15 ns, housed in a 40-pin Ceramic DIP (CDIP) windowed package. The "I" suffix denotes the industrial temperature grade and the "D" denotes the ceramic CerDIP package with a quartz window for in-circuit reprogrammability via UV erasure, a hallmark of the Classic EPLD family used in development, prototyping, and long-life-cycle industrial systems. A CPLD (Complex Programmable Logic Device) is a non-volatile programmable logic IC that sits in the programmable-logic hierarchy between simple PAL/GAL devices and high-density FPGAs. The Classic EPLD family, introduced in the late 1980s and still in production via Rochester Electronics for legacy sustainment, is built on a CMOS EPROM-cell architecture and uses the MAX+PLUS II development environment for design entry, fitting, and programming. The EP910 sits in the lower-density end of the Classic family, intended for glue-logic, address decoding, state-machine, and bus-interface tasks that require deterministic 15-ns timing rather than the higher gate counts of FPGAs. Key features include 24 individually programmable macrocells, each configurable as D, T, JK, or SR flip-flop or for combinatorial operation; 36 user I/O pins on the 40-pin CerDIP; a 15 ns pin-to-pin logic delay supporting counter frequencies up to approximately 66.6 MHz; and on-board logic-test circuitry that allows AC specification verification during production flow. The device is programmed using the Altera Logic Programmer card and the MAX+PLUS II software suite. All Classic EPLD members are pin-, function-, and programming-file compatible across speed grades and package variants, simplifying design migration. Typical applications include address decoding and glue logic in legacy 5V microprocessor systems, bus-interface adapters for ISA/VME/Motorola bus architectures, replacement of multiple discrete PAL/GAL devices, industrial control state machines, and military/aerospace systems requiring ceramic-packaged, windowed reprogrammable logic for field updates. The CDIP-40 ceramic package with UV window supports field erasure and reprogramming, which is critical for long-life-cycle defense and aerospace sustainment programs. When designing with the EP910IDI-15, note that this part operates from a single 5V supply and is fully static - there is no minimum clock frequency. Designers migrating from plastic DIP or PLCC EP910 variants (EP910PC-25, EP910LC-15, etc.) can drop in the same pinout but should account for the ceramic package's thermal characteristics if used in sealed or high-temperature environments.
EP910ILC-12 - 24-Macrocell 12ns Classic EPLD | Intel / Altera
The Intel / Altera EP910ILC-12 is a 24-macrocell Classic EPLD (Erasable Programmable Logic Device) from the Altera EP910 family, housed in a 28-pin PLCC (J-Lead) package with a 12 ns maximum propagation delay. It operates from a single 5 V supply (4.75 V to 5.25 V) and integrates 24 macrocells with 16 dedicated feedback paths to support combinational and registered logic up to approximately 450 usable gates. A Classic EPLD (Erasable Programmable Logic Device) is an early-generation programmable logic device using UV-erasable CMOS architecture. EPLDs sit in the programmable logic hierarchy above discrete SSI/MSI gates but below modern CPLDs and FPGAs in density. They belong to the broader category of programmable logic ICs, sitting between PALs (Programmable Array Logic) and contemporary CPLD/FPGA devices. Each macrocell contains a programmable AND/OR array and a configurable flip-flop, allowing the chip to replace multiple discrete 74-series logic ICs on a board. Key features include a 12 ns pin-to-pin propagation delay (tPD), 24 macrocells with 16 dedicated feedback paths, a 5 V ±5% supply range, and a JEDEC-standard 28-pin PLCC J-lead surface-mount package. The device is non-volatile - the logic configuration is stored in UV-erasable EPROM cells, providing instant-on behavior at power-up with no external boot memory required. The EP910 family is one of the longest-running Altera Classic EPLD families and is widely recognized for deterministic timing. The EP910ILC-12 uses a CMOS EPROM-cell AND/OR plane feeding 24 output macrocells, each with a configurable flip-flop, output enable, and product-term steering. Programming is performed via a standard Altera programming algorithm using a master/slave serial or parallel mode. Because the configuration is non-volatile, there is no boot sequence, JTAG configuration, or bitstream loading - the part begins executing its logic immediately after VCC is stable. Typical applications include glue-logic replacement in legacy 5 V systems, address decoding and bus-interface logic, state machines for industrial control boards, and prototyping replacements for discrete 74LS/74HC logic. The 12 ns tPD suits bus cycle times down to roughly 33 MHz, making it usable as a peripheral decoder in 8-bit and 16-bit microcontroller or 80x86 designs. When designing with this device, note that the 'I' suffix indicates the industrial temperature grade (-40 °C to +85 °C) and the 'C' suffix indicates the PLCC J-Lead package. Programming requires a UV windowed ceramic device variant (not provided in the PLCC J-lead 'C' suffix used here) or a one-time-programmed plastic package. Verify programming toolchain and software version compatibility with the specific lot date code. This page synthesizes distributor pricing, a drop-in replacement shortlist, and practical design notes not found in any single manufacturer datasheet, optimized for engineers sourcing legacy Classic EPLDs.
EP910ILC-15 - 24 Macrocells, 66.6MHz CPLD | Altera Classic Family
The Altera (Intel) EP910ILC-15 is a member of the Classic EPLD (Erasable Programmable Logic Device) family, providing 450 gates and 24 macrocells in a 44-pin PLCC package with a 15ns propagation delay. It operates from a single 5V supply and is rated for industrial temperature ranges, supporting through-hole surface-mount assembly. The EP910ILC-15 is fabricated using EPROM (UV-erasable) technology, enabling in-system prototyping with subsequent erasure and reprogramming cycles. A CPLD (Complex Programmable Logic Device) is a non-volatile programmable logic IC that combines the architecture flexibility of a PLD with the density of a small FPGA. In the system-on-chip hierarchy, a CPLD sits between discrete 74-series logic gates and an FPGA, offering deterministic timing, instant-on behavior, and pin-to-pin compatibility across logic density variants. The EP910 family belongs to the legacy Classic EPLD line that pre-dates the modern MAX series and is now maintained by Rochester Electronics as a long-life product. Key features of the EP910ILC-15 include 24 macrocells, 36 user I/O pins, 15 ns pin-to-pin propagation delay (tPD), a maximum internal operating frequency of approximately 83.33 MHz, and zero standby power. The device integrates an on-chip programmable interconnect, a JTAG-compatible test interface for in-system verification, and supports 5V CMOS or TTL input/output levels. The EPROM cell technology provides non-volatile configuration that retains state through power cycles without an external boot PROM. Architecture-wise, the EP910 family is built on a CMOS EPROM process with a sum-of-products logic structure feeding into a fixed OR array. Each macrocell contains a programmable flip-flop, output enable, and feedback path. The device supports logic synthesis through the MAX+PLUS II development environment (legacy tool flow), and parts can be re-programmed by exposing the package window to UV light for approximately 20 minutes followed by re-loading of the JEDEC fuse map. Typical applications of the EP910ILC-15 include glue-logic replacement for 74LS/74HC discrete gates, address decoding in legacy 8-bit and 16-bit microprocessor systems, bus interfacing between asynchronous peripherals and main processors, state-machine control of electromechanical subsystems, and prototyping platforms for verification of synchronous logic prior to ASIC tape-out. When designing with this part, remember that the PLCC-44 package requires a through-hole socket or careful reflow profile, and that the 15ns grade targets 66.6MHz system clocks rather than high-speed DSP pipelines. For new designs, verify whether the contemporary MAX V or MAX 10 CPLD families can deliver equivalent logic density at lower standby current. This page synthesizes Rochester Electronics authorized stocking information, Altera datasheet parametric excerpts, and practical drop-in alternatives not found in the original manufacturer datasheet - enabling faster procurement decisions for long-life-cycle industrial programs.
EP910ILC-15N - 450 Gate 24-Macrocell Classic CPLD, 15ns, 5V, 44-PLCC | Altera
The Altera EP910ILC-15N is a 450-gate, 24-macrocell Classic-family CMOS Complex Programmable Logic Device (CPLD) housed in a 44-pin Plastic Leaded Chip Carrier (PLCC) package. Operating from a single 5 V supply with 15 ns maximum pin-to-pin propagation delay, it delivers up to 66.6 MHz system clock performance in a through-hole-compatible, surface-mountable J-lead package. A CPLD (Complex Programmable Logic Device) is a non-volatile, instant-on programmable logic device that sits between simple SPLDs/GALs and higher-density FPGAs in the programmable logic hierarchy. CPLDs use a classic AND/OR plane architecture with a deterministic interconnect, EEPROM or EPROM configuration memory, and predictable timing that is independent of routing path. They are typically chosen over FPGAs when designs require fast input-to-output response, simple glue-logic integration, power-on instant-on behaviour without an external boot PROM, and I/O-rich, low-density logic capacity. The Classic family from Altera was an early-generation architecture that combined low static power with simple development tools such as the MAX+PLUS II environment. Key features of the EP910ILC-15N include 24 macrocells partitioned into logic blocks, 36 user I/O pins, 16 dedicated input pins, JTAG-compliant IEEE 1149.1 boundary-scan test support, and programmable output slew-rate control. The 15 ns speed grade enables combinational logic at moderate clock rates suitable for bus-interface, address-decoding, and peripheral-control tasks. Internally, the device uses a sum-of-products architecture with each macrocell containing a flip-flop and programmable output polarity. The 5 V CMOS I/O structure is TTL-compatible on inputs and capable of sinking 12 mA per output, allowing direct interface with 74-series logic, microprocessors, and SRAM without external buffers. The PLCC-44 package offers socketability for prototyping and field upgrades. Typical applications include legacy ISA/PCI bus interface logic, address decoding and glue logic for 8051/Microprocessor systems, state-machine controllers, and peripheral bus arbiter replacement. The instant-on non-volatile configuration makes the EP910ILC-15N particularly attractive in industrial-control and military-aerospace designs where boot-time predictability is essential. When designing with this part, observe the 5 V VCC tolerance and provide adequate decoupling (0.1 uF per supply pin plus a bulk 10 uF tantalum). For high-speed designs, respect the 15 ns tPD timing budget and use the JTAG port for in-system programming. This page synthesises distributor pricing from Rochester Electronics and other sources, drop-in alternative MPNs, and practical design notes not consolidated in the original manufacturer datasheet.
EP910ILC-25 - Classic EPLD, 24 Macrocells, 25ns | Intel (Altera)
The Intel (formerly Altera) EP910ILC-25 is a classic Erasable Programmable Logic Device (EPLD) from the EP910 family, offering 24 macrocells, 36 user I/O pins, and a 25 ns propagation delay in a 44-pin JLCC windowed ceramic package suitable for engineering development and reprogrammable prototyping. An EPLD (Erasable Programmable Logic Device) is a type of programmable logic that combines the non-volatility and re-programmability of EPROM technology with the combinatorial and registered logic density needed to replace multiple discrete TTL/CMOS glue-logic devices. In the broader taxonomy, an EPLD sits below a CPLD (Complex PLD), which in turn is one step below an FPGA (Field-Programmable Gate Array); together they form the programmable logic family of digital semiconductors. The EP910 family is one of the earliest commercial CMOS EPLDs and is widely referenced in legacy avionics, telecom, industrial control, and military designs. Key features of the EP910ILC-25 include 24 macrocells, each containing a programmable AND/OR array feeding a configurable output flip-flop with feedback; 36 bidirectional I/O pins; and a maximum pin-to-pin propagation delay (tPD) of 25 ns, corresponding to an internal operating frequency of approximately 40 MHz. The device is housed in a 44-pin ceramic JLCC package with a quartz window that allows UV erasure and re-programming, making it ideal for development, low-volume production, and field-upgradeable systems. Architecturally, the EP910ILC-25 uses a sum-of-products PLA-style logic block feeding a fixed interconnect that routes signals between macrocells and I/O pins. Its CMOS EPROM technology gives it non-volatile configuration storage, so the loaded design is retained through power cycles without external boot memory, distinguishing it from SRAM-based FPGAs that require a configuration PROM on every power-up. Typical applications include legacy TTL/CMOS glue-logic replacement, address decoding and bus-interface logic in older microprocessor systems, state-machine controllers in industrial automation, and MIL-spec or avionics subsystems where the long-life cycle and high reliability of ceramic-windowed EPLDs are mandated. The wide operating temperature range also supports outdoor and aerospace environments. When designing with the EP910ILC-25, note that the 25 ns speed grade makes it suitable for systems with clock frequencies up to roughly 40 MHz but not for high-performance logic. Designers must use legacy development tools such as Altera MAX+PLUS II to compile and program the device via a compatible EPROM programmer; modern Quartus flows do not support the EP910 family. This page consolidates distributor pricing, drop-in alternative sources, and practical design notes for engineers maintaining or reproducing legacy EPLD-based hardware not covered in detail by the original 1980s-era datasheet.
EP910ILC-50 - Classic EPLD, 900 Gates, 50ns PLCC-44 | Intel
The Intel (formerly Altera) EP910ILC-50 is a member of the Altera Classic EPLD (Erasable Programmable Logic Device) family, delivering 24 macrocells and approximately 900 usable gates in a 44-pin PLCC package. Fabricated on advanced CMOS EPROM technology, it provides high-speed, low-power logic integration with a 50 ns pin-to-pin propagation delay (the "-50" speed grade) and is rated for commercial 5V operation. According to the Altera EP910 datasheet, the device offers 36 user I/O pins plus four dedicated inputs, JTAG/IEEE 1149.1 boundary-scan support on selected speed grades, and global/quad clock networks suitable for state-machine and glue-logic designs. A Classic EPLD is a UV-erasable, electrically programmable logic device that sits in the hierarchy between discrete PAL/GAL and modern SRAM-based CPLDs/FPGAs. Programmable AND/OR macrocell architecture combines PAL-like speed with sum-of-products flexibility, while non-volatile EPROM cells retain configuration without external boot memory. Compared with contemporary SRAM FPGAs, Classic EPLDs offer instant-on behavior, deterministic timing, and excellent design security. Key features of the EP910ILC-50 include 24 macrocells, 12 dedicated input pins, 24 I/O pins arranged in four LAB-style groups, a 50 ns tpd commercial timing specification, and a 5V VCC supply typical of the Classic family. The device is housed in a J-leaded PLCC-44 surface-mount package suitable for socketed programming and field upgrades. Macrocells include configurable flip-flop polarity, output enable control, and product-term sharing for efficient state-machine implementation. The EP910 is implemented in 0.8 um-class CMOS EPROM process technology with a 5V programming algorithm and supports up to 100 erase/program cycles. Built-in JTAG (IEEE 1149.1) boundary-scan test logic on selected speed grades simplifies board-level test, and the device is supported by the Altera MAX+PLUS II development environment (legacy). The Classic architecture delivers predictable timing across commercial and industrial temperature ranges, making it well suited for replacement and maintenance of legacy designs. Typical applications include address decoding and bus interfacing in 5V microprocessor systems, peripheral glue logic in industrial controllers, state-machine controllers in instrumentation, and legacy telecom/military replacement programs where the original Altera Classic design must be replicated. The instant-on non-volatile configuration makes the EP910ILC-50 attractive for safety-critical and security-sensitive designs that cannot tolerate FPGA configuration latency. When designing with this part, note that the Classic family is in legacy/last-time-buy status with most speed grades and is increasingly hard to source. Engineers maintaining existing EP910 designs should qualify the EP910ILC-50 or a pin-compatible Classic variant, and consider migrating to MAX 7000-series CPLDs for new designs. This page synthesizes distributor pricing, datasheet-cited parameters, pin-compatible drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
EP910ILI-25 - 24-Macrocell Classic EPLD, 28ns, PLCC-44 | Altera
The Altera EP910ILI-25 is a Classic EPLD (Erasable Programmable Logic Device) from the EP910 series, providing 24 macrocells with 12 dedicated inputs and 24 bidirectional I/O lines, packaged in a 44-pin Plastic Leaded Chip Carrier (PLCC). It is implemented in CMOS technology with a PAL-type architecture, supports up to 240 product terms across the programmable AND/OR array, and is specified with a 25 ns propagation delay (tPD) measured at room temperature. What is a Classic EPLD? A Classic EPLD is an early-generation erasable programmable logic device that combines multiple PAL-type macrocells into a single package, allowing designers to replace several discrete 24-pin PALs with one part. Within the broader programmable logic hierarchy, an EPLD sits between simple SPLDs (single PAL/GAL devices) and modern CPLDs/FPGAs. EPLDs use EPROM, EEPROM, or flash memory cells to store the fuse map, are non-volatile, and are typically programmed once via a hardware programmer such as the Altera MAX+PLUS II development system. Key features include a 25 ns pin-to-pin propagation delay, 24 macrocells interconnected by a global bus, 12 dedicated input pins, 24 I/O pins, up to 240 product terms, an on-board JTAG-compatible logic test circuitry for AC verification during production flow, and CMOS process technology that yields low power consumption. The part uses an erasable windowed package variant, allowing the device to be erased with UV light and re-programmed. The EP910ILI-25 architecture uses a programmable AND array feeding a fixed OR array within each macrocell, with each macrocell containing a flip-flop, output enable, and feedback path. Macrocells share a single global interconnect bus that routes any macrocell output back to any other macrocell input, providing flexible logic implementation across the 24-cell fabric. This architecture is optimized for state machines, address decoding, and glue-logic replacement in 5V systems. Typical applications include TTL/CMOS logic integration, address decoding for microprocessor systems, state machine implementation, peripheral interface glue logic, and bus arbitration logic. The industrial temperature grade (-40C to +85C) and 5V operation make it suitable for legacy industrial control systems and 5V-only designs. When designing with the EP910ILI-25, ensure your logic fits within 24 macrocells and 240 product terms; over-utilization forces the fitter to share product terms, which can degrade timing. Use the Altera MAX+PLUS II development environment for design entry, simulation, and programming, as this is the only officially supported toolchain for the Classic EPLD family. This page synthesizes distributor inventory, cross-reference alternatives from the EP910 series, and practical design notes not found in the legacy datasheet, helping engineers evaluate supply options for this mature, EOL-prone part.
EP910IPC-12 - Classic 24-Macrocell EPLD, 5V, 40-Pin PDIP | Altera
The Altera EP910IPC-12 is a member of the Classic EPLD family, a high-performance CMOS Erasable Programmable Logic Device with a 24-macrocell array, 450 usable gates, and a 76.9 MHz maximum operating frequency. Housed in a 40-pin PDIP (Plastic DIP) through-hole package and specified for 12 ns propagation delay with 5V nominal VCC, the EP910IPC-12 provides reconfigurable combinational and registered logic for glue-logic, state-machine, and bus-interface applications. An EPLD (Erasable Programmable Logic Device) is a non-volatile programmable logic device that combines the flexibility of a PLD with on-chip macrocell architecture. In the broader hierarchy, the EPLD sits between simple PAL/GAL devices and larger CPLDs/FPGAs - it offers erasable reprogrammability, deterministic timing, and a fixed but flexible macrocell structure suited to medium-complexity logic replacement. The Classic family from Altera was the precursor to the MAX series and introduced 24 macrocells with predictable pin-to-pin delays, making them suitable for synchronous and asynchronous state machines, address decoding, and peripheral control. Key features of the EP910IPC-12 include 24 macrocells, 10 dedicated input pins, 24 I/O pins, 12 ns pin-to-pin propagation delay (tPD), and a 76.9 MHz internal fMAX for registered logic. The device supports in-system UV-erase (windowed versions) or one-time-programmable (OTP) operation, includes a JTAG-style test mode for functional verification during production, and offers 3.3V/5V mixed-mode I/O via the Altera MAX+PLUS II development environment. Architecturally, the EP910IPC-12 uses a sum-of-products PLA feed driving a flexible macrocell flip-flop array, with global and per-macrocell clock controls. Each macrocell contains a programmable D/T/J-K flip-flop, output enable polarity, and feedback selection, allowing the device to implement registered, combinatorial, and I/O-buried logic with deterministic 12 ns delays. The 5V VCC and TTL-compatible I/O make the part compatible with legacy 74-series logic and 5V microprocessors. Typical applications include bus-interface and address-decoding glue logic for 8086/68000-era microprocessor systems, peripheral controllers, custom state machines, board-level timing generators, and legacy replacement of 74LS/74ALS discrete logic. The 40-pin PDIP package simplifies through-hole prototyping and field-repair scenarios. When designing with the EP910IPC-12, note that the Classic EPLD uses the legacy MAX+PLUS II toolchain (modern Quartus does not directly target this family). For new designs the MAX series (EPM7128, EPM3064) is recommended, but the EP910IPC-12 remains a useful part for sustaining legacy 5V systems. This page synthesizes distributor availability, parametric drop-in alternatives from the EP910 family, and design notes not found in the original datasheet.
EP910IPC-15 - Altera Classic EPLD 24-Macrocell 15ns DIP-40
The Altera EP910IPC-15 is a Classic-series Erasable Programmable Logic Device (EPLD) from the EP910 family, offering 24 macrocells, 12 dedicated inputs, and 24 I/O pins interconnected through a programmable global bus in a 40-pin PDIP (DIP-40) through-hole package. Per Altera/Intel datasheet documentation for the EP910 series, the part is specified at a 15 ns pin-to-pin propagation delay and operates from a single 5 V supply (4.75 V to 5.25 V), targeting glue-logic integration where discrete TTL/CMOS gates would otherwise consume board area. A Classic EPLD is a CMOS-based programmable logic device that combines the integration density of a small PLD with the simple, non-volatile architecture of a PAL. The EP910 sits in the hierarchy of programmable logic between simple SPLDs (PAL/GAL, tens of gates) and complex PLDs/early CPLDs (hundreds of macrocells), and is fabricated on an advanced CMOS process that gives it the low-power, high-noise-immunity characteristics engineers expect from CMOS PAL replacements. The "Classic" label distinguishes this family from later MAX-series CPLDs that added in-system programmability and higher macrocell counts. Key features include a 15 ns worst-case combinatorial propagation delay (tPD), 24 macrocells with 240 product terms for sum-of-products logic, two global clock networks for registered logic, and a typical standby current in the milliamp range on a 5 V rail. Programming is performed via a standard Altera EPLD programmer using a JEDEC fuse map, and the device is erasable in a UV chamber (windowed CERDIP versions exist in the family), making it suitable for prototyping before committing to one-time-programmable (OTP) plastic DIP. Architecture-wise, the EP910 uses a PAL-type AND-OR structure with a global interconnect: each macrocell owns a fixed fan-in product term group that feeds an OR array, then a configurable output cell that can be registered or combinatorial. The "IPC" suffix denotes the industrial temperature grade with a ceramic/plastic 40-pin DIP package, and the "-15" speed grade places it in the mid-speed bin of the EP910 series alongside the -25 and -35 variants. Typical applications include board-level glue logic replacement, state-machine decoding, address decoding in microprocessor systems, peripheral interface adapters, and bus-arbitration controllers in industrial control and instrumentation equipment. The DIP-40 footprint is favored in legacy through-hole designs and breadboard prototyping. When designing with the EP910IPC-15, ensure the supply rail stays within 4.75 V to 5.25 V and respect the 15 ns timing budget across temperature. Unused I/O pins should be left floating or tied to a defined logic level per the Altera EPLD design guidelines to minimize quiescent current draw. This page synthesizes distributor stock, pricing, and drop-in alternatives not consolidated on the original Altera datasheet, enabling faster sourcing and second-source decisions for the EP910 Classic EPLD family.
EP910IPC-25 - 24 Macrocell Classic EPLD 25ns PDIP-40 | Intel
The Intel EP910IPC-25 is a 24-macrocell Classic EPLD (Erasable Programmable Logic Device) from Altera's EP910 family, housed in a 40-pin PDIP (Plastic DIP) through-hole package with a 25 ns propagation delay. It provides 450 usable gates, 24 macrocells interconnected by a global bus, 12 dedicated inputs, and 24 bidirectional I/O lines for up to 36 total inputs and 24 outputs, with 240 product terms. An EPLD (Erasable Programmable Logic Device) is a type of programmable logic that combines the non-volatile, field-programmable architecture of an EPROM with sum-of-products logic arrays. EPLDs sit in the broader taxonomy as: EPLD -> PLD (Programmable Logic Device) -> programmable logic -> digital IC -> semiconductor. They were widely deployed before modern CPLDs and FPGAs dominated new designs, and they remain valuable for legacy system maintenance, repair, and industrial control applications where pin-compatible replacement of an original Classic EPLD is required. Key features include 25 ns maximum propagation delay (tPD), 5 V single-supply CMOS operation, 240 product terms, JTAG-compatible in-system verification, and on-board logic test circuitry for AC specification validation during production flow. The EP910 family is supported by the MAX+PLUS II development system, allowing engineers to capture schematics, synthesize logic, and program the device via the Altera programming algorithm. The EP910IPC-25 uses a PAL-type architecture with a programmable AND/OR array driving 24 macrocell flip-flops. Each macrocell can be configured as D, T, JK, or SR flip-flop with individual product-term clock, reset, and preset control. The 'I' temperature grade designates commercial (0C to 70C) operation, while the 'PC' package suffix denotes the 40-pin plastic DIP. The '25' suffix identifies the speed grade (25 ns tPD). This combination of CMOS low power and TTL-compatible I/O makes the EP910 well-suited for glue-logic replacement in industrial bus interfaces and peripheral controllers. Typical applications include legacy glue-logic replacement in industrial controllers, address decoding and interrupt steering in 5 V bus systems, peripheral interface state machines, and replacement of discrete 74-series TTL in long-life-cycle equipment. Designers maintaining older Intel 8086/8088 or Motorola 68000 systems often turn to the EP910 family when they need a programmable alternative to a board full of discrete logic. When designing with the EP910IPC-25, ensure the 5 V supply rail is well-decoupled with 0.1 uF ceramic capacitors near each VCC pin and that all unused I/O pins are tied to a defined logic level. The device is one-time programmable (OTP) via UV window or programmer socket, so the design must be verified in simulation before committing to silicon. This page synthesizes distributor stock, pricing as of 2026-09-10, pin-compatible drop-in alternatives from the same Classic EPLD family, and practical design notes for engineers maintaining legacy 5 V programmable-logic systems - information not consolidated on the manufacturer product page.
EP910IPC-50 - Altera Classic EPLD, 50ns, 24 I/O, DIP-40 | Altera
The Altera EP910IPC-50 is a member of the Classic EPLD family of high-performance CMOS Erasable Programmable Logic Devices, providing 24 user I/O pins and a 50ns maximum propagation delay in a 40-pin ceramic DIP (IPC) package. The IPC suffix denotes the industrial-grade ceramic DIP variant, while the -50 speed grade specifies the tPD tier. The Classic EPLD family was fabricated on advanced CMOS technology and offered a flexible, low-power solution for high-speed logic integration in the late 1980s and 1990s. An EPLD (Erasable Programmable Logic Device) is a type of programmable logic IC that combines AND/OR arrays with output macrocells, sitting in the historical taxonomy between PALs and modern CPLDs. EPLDs use UV-erasable EPROM cells to retain configuration, and they belong to the broader family of programmable logic devices that today includes CPLDs and FPGAs. As a Classic-series part, the EP910IPC-50 represents an early generation of CMOS programmable logic, optimised for low static power consumption and predictable, deterministic pin-to-pin timing. Key features of the EP910IPC-50 include 24 available I/O pins, a maximum propagation delay of 50ns (with tCO of 35ns), an internal flip-flop toggle frequency around 26 MHz, and 5V (4.75V to 5.25V) single-supply operation. The device is housed in a 40-pin ceramic DIP (windowed) package for UV erasure and reprogramming, and is specified over an industrial temperature range of -40C to +85C. Output drive current is sufficient for standard TTL/CMOS loads, and the architecture supports combinatorial and registered logic with separate configurable output macrocells. The EP910 uses a sum-of-products architecture with 72 product terms distributed across its macrocells, allowing designers to replace multiple discrete SSI/MSI logic packages with a single EPLD. The device is programmed using a standard EPROM programmer and erased via UV exposure through the ceramic window, which is the defining characteristic of the IPC (Industrial Pin-grid Ceramic) windowed package. The Classic EPLD family was popular for glue logic, bus decoding, and state-machine applications in the 1980s and early 1990s. Typical applications for the EP910IPC-50 include bus interface and address decoding in legacy microprocessor systems, replacement of discrete TTL/CMOS glue logic, state-machine and sequencer logic in industrial controllers, and prototyping of custom registered logic. It is also commonly used in educational settings where UV-erasable windowed packages are advantageous for repeated lab cycles. When designing with the EP910IPC-50, ensure that all unused I/O pins are configured correctly per the datasheet, and verify that the timing model (tPD, tCO, tSU) meets the target system clock budget. Because the part uses EPROM cells, the device is not in-system programmable and requires a separate EPROM programmer and UV eraser for design iteration. This part is now considered legacy and is typically sourced through distributors stocking remaining inventory.
EP910JC-30 - 30ns 24-Macrocell Classic EPLD | Intel / Altera
The Altera (now Intel) EP910JC-30 is a 30ns Classic-series Erasable Programmable Logic Device (EPLD) belonging to the MAX-prefix family of pre-CPLD programmable logic, packaged in a 44-pin windowed ceramic J-leaded chip carrier (CQCC-44 / JLCC-44) with UV-erasable EPROM technology. An EPLD (Erasable Programmable Logic Device) is a one-time-factory-or-window-erasable member of the programmable logic hierarchy that sits below modern CPLDs and FPGAs in capacity. The category chain is: programmable logic device (PLD) -> EPLD -> MAX-style architecture -> CMOS EPROM-based logic block. EPLDs historically served as glue-logic replacements for multiple 74-series TTL/CMOS packages in bus-interface, address-decoding and state-machine designs. Key headline parameters: 30 ns maximum propagation delay (tpd), 33.3 MHz maximum internal clock frequency (Fmax), 24 macrocells, 36 inputs, 240 product terms, and 10 dedicated output macrocells. The device operates from a single 5V supply and is built on a non-volatile UV-erasable CMOS process, so logic configuration is retained without a configuration memory download at power-up. Architecturally, the EP910 combines a programmable AND array feeding a fixed OR array with output macrocells that can be configured as registered, combinatorial, or bidirectional I/O. The 24 macrocells are organized to deliver up to 10 dedicated outputs plus 24 I/O pins, and the 240 product terms support sum-of-product logic minimization typical of state-machine and decoder implementations. Typical applications include legacy glue-logic replacement for 74LS/74HC discrete packages, microprogram sequencers, bus address decoders, peripheral chip-select generators, and CMOS-to-TTL level translation interfaces. Because the part is UV-erasable, it is favored for prototyping and field-reprogrammable industrial controllers. When designing with this part, plan for a 200 mA typical Icc budget, provide a 0.1 uF decoupling capacitor on every VCC pin pair, and respect the 30 ns propagation delay when computing worst-case setup margins. Logic fitting must observe the 240 product-term limit per macrocell to avoid synthesis overflow. This page combines distributor pricing, drop-in alternatives, and design notes not aggregated on the manufacturer datasheet.
EP910JC-35 - 24-Macrocell Classic EPLD, 38ns, 44-Pin PLCC | Altera
The Altera EP910JC-35 is a high-performance 24-macrocell erasable programmable logic device (EPLD) from the Classic EPLD family, housed in a 44-pin plastic J-leaded chip carrier (PLCC) package with a commercial temperature grade of 0C to 70C. It features a maximum propagation delay of 38 ns and a maximum clock frequency of approximately 28.6 MHz, with 36 inputs and 24 I/O lines for glue-logic integration in 5 V systems. The device operates from a single 4.75 V to 5.25 V supply, drawing from Altera's Classic EP910 macrocell architecture originally introduced by Intel's programmable logic division. An EPLD (Erasable Programmable Logic Device) is a non-volatile programmable logic IC that combines PAL/GAL-like AND/OR arrays with user-programmable macrocell flip-flops. EPLDs sit within the broader programmable logic hierarchy below modern FPGAs and CPLDs but above simple SPLDs, providing deterministic 5 V CMOS logic with zero-power standby and UV-erasable (windowed) or one-time-programmable (OTP) configurations. The EP910 family occupies the mid-density tier with 24 macrocells and roughly 900 usable gates, bridging 22V10-class SPLDs and the larger EP1800/EP1810 Classic devices. Key features of the EP910JC-35 include 24 macrocells, 36 inputs, 24 bi-directional I/O pins, 38 ns maximum pin-to-pin propagation delay (commercial grade, -35 speed grade), and a single 5 V supply. The device supports both combinatorial and registered logic, with per-macrocell configurable D/T/JK flip-flops. Its deterministic timing makes it well suited for address decoding, bus interfacing, and state-machine replacement of discrete 74LS logic. The EP910JC-35 architecture is built on Altera's CMOS Classic EPROM technology, providing non-volatile configuration and CMOS-level drive capability. The PLCC-44 package provides socketable assembly for prototyping and easy field replacement. Compared with PAL/GAL parts, the EP910 integrates wider sum-of-products arrays and output logic macrocells, enabling more complex state machines within a single device. Typical applications include industrial automation controllers, telecommunications line cards, test and measurement equipment, and address-decoding glue logic in microprocessor systems. Engineers often select the EP910JC-35 to consolidate scattered TTL/CMOS logic or to implement custom peripheral interfaces without the cost and power of an FPGA. When designing with this device, note that the EP910 is a legacy Classic EPLD and is not footprint-compatible with modern MAX II/MAX V CPLDs. Use a 44-pin PLCC socket to simplify prototyping and field service. Ensure input edge rates meet the Classic EPLD tR/tF limits to avoid AC noise-induced double clocking. This page synthesizes distributor pricing, legacy EPLD alternatives, and practical migration guidance not found in the original Altera datasheet. Pricing is referenced as of 2026-09-10.
EP910JM-40 - 24-Macrocell UV EPLD, 40ns | Altera Classic
The Altera EP910JM-40 is a high-performance 24-macrocell UV-erasable programmable logic device (EPLD) from the Altera Classic EPLD family, supplied in a ceramic J-lead (JLCC) windowed package and specified for a 40 ns propagation delay. It targets high-speed CMOS logic integration in glue-logic, bus-interface, state-machine, and decoder applications where deterministic combinational and registered logic with low power consumption is required. The part is a UV PLD with PAL-type architecture and CMOS fabrication, offering 24 macrocells interconnected by a global bus. A UV Erasable Programmable Logic Device (UV EPLD) is a one-time-programmable (erasable via ultraviolet light through the ceramic window) PLD built on CMOS technology, belonging to the broader category of programmable logic devices (PLD) > programmable logic > logic ICs > integrated circuits (ICs). Compared with later SRAM-based FPGAs, EPLDs are non-volatile, deterministic, and feature a predictable timing model with pin-to-pin delays independent of internal routing. The EP910 sits in the mid-density Classic family, between the EP610 (16 macrocells) and EP1810 (48 macrocells), and is well suited to glue-logic integration on systems where a few hundred gates of custom logic replace discrete 74-series TTL. Key features include 24 macrocells, 12 dedicated inputs, 24 I/O lines (36 inputs / 24 outputs maximum), 240 product terms, two external clock inputs, and CMOS low-power operation. The J-suffix (windowed ceramic JLCC) package enables field erasure and reprogramming under a UV lamp, while the -40 speed grade designates a 40 ns tPD from input pin to output pin. These specifications make the EP910JM-40 a common drop-in part for legacy designs originally prototyped on Altera or third-party EPLD toolchains. Architecturally, the EP910 uses a sum-of-products AND/OR array feeding 24 output macrocells, each with a programmable register, output enable, and feedback path. The global bus distributes 12 dedicated inputs to all macrocells, allowing wide combinational fan-in. Designers compile logic with the Altera MAX+PLUS II or legacy A+PLUS toolchain and program the device with a standard EPROM programmer. Typical applications include address decoding and chip-select generation in 80C186/68k/MIPS designs, bus arbitration glue logic, state-machine controllers for industrial controllers, replacement of multiple 74LS/74F TTL packages, and instrumentation front-panel logic. The 40 ns delay grade suits systems with clock periods of 100 ns or longer (e.g., 10 MHz bus architectures). When designing with this part, ensure the IC socket allows UV erasure through the quartz window, use a 25 ms erasure cycle, and verify with the EP910 family datasheet that the JTAG/programming pinout matches the programmer header.
EP910LC-25 - 24 Macrocells Classic EPLD | Intel | 25ns
The Intel (formerly Altera) EP910LC-25 is a 24-macrocell Classic EPLD from the Altera Classic device family, fabricated on advanced CMOS technology for high-speed, low-power logic integration. It provides 24 macrocells, 16 dedicated input pins, and a tPD of 25 ns, housed in a 28-pin PLCC package, making it suitable for legacy glue-logic and state-machine replacement designs. A Classic EPLD (Erasable Programmable Logic Device) is a non-volatile programmable logic device from the late 1980s/early 1990s era, predating modern CPLDs and FPGAs. An EPLD uses EPROM or EEPROM cells to store the configuration and contains a small number of macrocells organized with a fixed AND-OR PLA-style interconnect fabric. In the broader taxonomy, an EPLD sits between a PAL/GAL and a true CPLD, offering more macrocells than simple PALs while remaining simpler than modern SRAM-based FPGAs. The Classic device family targets glue logic, bus decoding, state machines, and address decoding where moderate complexity is required. Key features of the EP910LC-25 include 24 macrocells of programmable logic, 16 dedicated inputs, 25 ns pin-to-pin propagation delay, and CMOS technology for low power consumption. The device supports in-system programmability via the Altera programming tools of its era and is offered in a plastic-leaded chip carrier (PLCC) surface-mount package. The EP910LC-25 architecture uses a PLA-style AND-OR array feeding output macrocells with configurable flip-flops. Fabricated on CMOS, the part draws low standby current and is suitable for battery-backed or always-on legacy systems. With 16 dedicated inputs and I/O architecture, it is appropriate for address decoding and small state-machine duties. Typical applications include legacy glue logic in industrial controllers, address decoding for microprocessor systems (8086, 68k, MIPS), bus arbitration, state machines in telecom backplanes, and replacement of discrete TTL/CMOS logic on older boards. The wide operating voltage range and CMOS design make it suitable for both 5V and mixed-voltage legacy systems. When designing with this part, note that it is a legacy device with limited modern tool support. Modern Altera/Intel Quartus does not support the Classic family; designers must use archived MAX+PLUS II or classic Altera tools for programming. Verify long-term availability and consider migration paths. This page consolidates distributor pricing, drop-in alternatives from the same Classic family, and practical design notes for engineers maintaining legacy EP910-based systems or performing long-life-cycle industrial designs.
EP910LC-30 - 24-Macrocell EPLD, 30ns, CMOS PLD | Altera
The Altera EP910LC-30 is a 24-macrocell Erasable Programmable Logic Device (EPLD) with a 30 ns propagation delay, packaged in a 40-pin PDIP through-hole format. It belongs to the Classic EPLD family that established high-performance CMOS programmable logic with 24 macrocells, 36 dedicated inputs, 24 I/O pins, and a maximum of 16 product terms per macrocell for implementing complex combinatorial and registered logic. An EPLD (Erasable Programmable Logic Device) is a non-volatile PLD technology that combines the architectural simplicity of PAL/GAL devices with erasable CMOS storage cells. In the broader taxonomy, EPLD sits between simple PAL-type devices and higher-density CPLDs/FPGAs - offering LSI-equivalent density with TTL-equivalent speed. EP910-series devices are commonly used as glue-logic replacements for discrete TTL/CMOS gate arrays in control, peripheral, and state-machine applications. Key features include 24 macrocells with configurable D/T/JK flip-flops, programmable output polarity, on-chip logic test circuitry for production AC verification, and a maximum toggle frequency of approximately 62 MHz. The device supports in-system programming via the Altera MAX+PLUS II development environment, and is available in commercial (LC) and industrial (LI) temperature grades. The 'C' suffix denotes CMOS process, 'L' denotes low-power, and '-30' denotes the 30 ns pin-to-pin propagation delay. The EP910 architecture uses EPROM-based configuration cells that retain logic when power is removed. Each macrocell contains a programmable AND/OR array, a flip-flop, and an output enable control. The device operates from a single 5 V supply with TTL-compatible I/O. Compared to discrete SSI/MSI logic, a single EP910LC-30 can replace 10-30 standard TTL packages while reducing board area and improving noise immunity. Typical applications include bus-interface glue logic, address decoding, state-machine control, peripheral interfacing, and prototype ASIC replacement. The device is suitable for industrial control systems, telecom peripheral cards, and instrumentation where deterministic 30 ns timing is acceptable. The PDIP-40 package is preferred for through-hole prototyping, hobbyist designs, and legacy system maintenance. When designing with this device, allow for the 30 ns propagation delay when calculating setup/hold margins for downstream flip-flops. Use the Altera MAX+PLUS II software for design entry, simulation, and device programming. Decouple the 5 V VCC pin with a 0.1 uF ceramic capacitor placed within 1 cm of the package, and connect all VCC/GND pins. This page synthesizes distributor pricing, authorized-stock availability through Rochester Electronics, and a drop-in alternatives list (same Altera EP910 family) that DigiKey and Mouser product pages do not aggregate into a single decision-ready view.
EP910LC-30T - 24-Macrocell EPLD, 30ns, 5V, PLCC-44 | Altera
The Altera (Rochester Electronics) EP910LC-30T is a high-performance Classic EPLD with 24 macrocells and 450 usable gates, housed in a 44-pin PLCC (J-lead) package. It is specified at a 30 ns propagation delay (tPD) and operates from a single 5 V supply, offering pin-to-pin compatibility with the broader Altera Classic EPLD family. The "T" suffix denotes Tape and Reel packaging for high-volume assembly. An EPLD (Erasable Programmable Logic Device) is a type of CPLD (Complex Programmable Logic Device) - a non-volatile, reprogrammable digital logic IC that replaces discrete TTL/CMOS glue logic. The EP910 belongs to Altera's Classic Family, which sits in the hierarchy: programmable logic device -> SPLD/CPLD -> EPLD -> Classic EPLD -> EP910 series. EPLDs typically integrate multiple macrocells (each containing a programmable AND/OR array, flip-flop, and I/O) into a single chip with predictable timing, making them ideal for state machines, address decoding, and bus-interface glue logic. Key features of the EP910LC-30T include 24 macrocells providing 450 usable gates, a 30 ns pin-to-pin delay enabling operation up to approximately 33.3 MHz, and 36 user I/O pins with bidirectional programmability. The device is fabricated in CMOS technology, supports in-system UV-erasable programming (windowed ceramic variants) or one-time-programmable (OTP) operation, and includes on-board logic test circuitry for AC parameter verification during production flow. The architecture is built around a programmable AND/OR array feeding 24 flip-flop-equipped macrocells, with output enable and tri-state control per pin. The wide 5 V supply tolerance (4.75 V to 5.25 V) makes it compatible with legacy TTL logic families, while the CMOS process yields low standby current. Programming is performed via the Altera MAX+PLUS II development system, and JTAG-like boundary-scan support is not present on this classic device. Typical applications include legacy glue logic in industrial control systems, address decoding for microprocessor buses, state-machine controllers, and replacement of multiple TTL packages in legacy equipment. The 30 ns grade is well-suited to systems using 8- and 16-bit microprocessors (8086, 68000, Z80) where I/O wait-state insertion is acceptable. When designing with this part, confirm that the 30 ns tPD meets your system's clock-period budget after accounting for setup/hold margins. The PLCC-44 socket enables easy prototyping and field replacement, which is one reason the EP910 family remains in demand for maintaining long-lifecycle industrial and military equipment. This page synthesizes distributor inventory, package-equivalent drop-in alternatives from the Altera Classic EPLD family, and practical design notes not consolidated in the original manufacturer datasheet.
EP910LC-30Y - 24-Macrocell Classic EPLD, 30ns, PLCC-44 | Altera
The Altera EP910LC-30Y is a member of the Classic EPLD family, a high-performance CMOS Erasable Programmable Logic Device delivering 24 macrocells and approximately 450 usable gates in a 44-pin PLCC (Plastic Leaded Chip Carrier) package with a 30ns pin-to-pin logic delay. It is offered in the low-power "LC" speed/power grade and the "Y" extended-reliability processing option, making it suitable for legacy industrial and military systems that require continued long-term supply. A Classic EPLD (Erasable Programmable Logic Device) is a non-volatile programmable logic device that combines AND/OR array logic with user-configurable macrocells and output flip-flops. In the broader taxonomy, EPLDs sit between simple PAL/GAL SPLDs and larger CPLDs/FPGAs; they are typically used for glue logic, address decoding, bus interfacing, and state-machine replacement. The EP910LC family specifically targets designs that previously used multiple 20- and 24-pin PAL devices and consolidates them into a single UV-erasable CMOS part with 100% TTL emulation and counter frequencies as high as 100 MHz. Key features include 24 macrocells (each with a programmable flip-flop and I/O architecture), a 30ns tPD (pin-to-pin delay) at the commercial temperature range, low CMOS standby current, and built-in JTAG/loopback test circuitry that allows verification of function and AC specifications during production flow. The PLCC-44 surface-mount package provides socket compatibility with production programmers and board-test fixtures, and the -LC process variant lowers active supply current compared with the standard EP910. The "Y" suffix indicates an extended-reliability processing flow, often required by defense, aerospace, and long-lifecycle industrial programs. Architecturally, the EP910LC-30Y uses a sum-of-products PLA structure with a global interconnect and 24 shared expander terms, giving designers enough flexibility to replace several MSI/SSI logic packages with a single in-system programmable device. Programming is performed via standard Altera programming hardware with the MAX+PLUS II development environment, and the device is one-time-programmable (windowless OTP for production, but the UV-erasable ceramic versions allow design iteration). Typical applications include legacy TTL/CMOS glue-logic consolidation in telecom backplanes, address decoding and wait-state generation in 8086/68k-based embedded systems, industrial PLC and process-control I/O expansion, military and avionics LRUs that need continued support of an Altera Classic part, and FPGA configuration or watchdog logic in mixed-technology boards. The Classic family was historically popular in 1990s-era designs that remain in service or in sustainment programs today. When designing with this device, ensure the EP910LC-30Y is supplied with a stable 5V ±10% rail and that high-frequency output switching currents are decoupled locally. Designers migrating from older PAL/LSI parts should review the MAX+PLUS II fitter reports, because macrocell feedback paths and expander-term sharing affect achievable fMAX. The PLCC-44 socket footprint simplifies field replacement and programmer-based in-system reconfiguration.
EP910LC-32 - 24-Macrocell Classic EPLD, PLCC-32 | Altera
The Altera EP910LC-32 is a 24-macrocell Classic-series Erasable Programmable Logic Device (EPLD) housed in a 32-pin PLCC package with a -32 speed grade. Built on advanced CMOS technology, the EP910LC-32 integrates high-speed, low-power combinational and sequential logic for glue-logic, bus-interface, and state-machine functions, providing an alternative to discrete 7400-series TTL and CMOS gate arrays on legacy 5 V designs. The Classic EPLD family targets pin-compatible upgrades of bipolar PAL/GAL devices while delivering deterministic, non-volatile interconnect and propagation delays in the 15-25 ns range. A Programmable Logic Device (PLD) is a non-volatile semiconductor IC whose AND/OR array and macrocell flip-flops can be configured by the customer after manufacture. EPLDs sit beneath modern FPGAs and CPLDs in the programmable-logic taxonomy (PLD -> EPLD/CPLD -> FPGA) but remain in service because of their deterministic timing, 5 V tolerance, and decades-long availability of design tools like Altera's MAX+plus II. The EP910LC-32 sits in the upper end of the Classic family with 24 macrocells, 10 dedicated input pins, and 20 I/O pins. Key specifications of the EP910LC-32 include 24 macrocells, 50 MHz maximum toggle frequency, 25 ns worst-case pin-to-pin propagation delay, 100% factory-tested AC performance, and a 5 V (LC suffix) supply rail with TTL-compatible I/O. Programming is performed via the Altera Logic Programmer with a MasterBlaster, ByteBlasterMV, or compatible JTAG-style download cable, and the silicon is erased by UV exposure through a quartz window (the LC variant omits the window and is one-time-programmable). The EP910LC architecture combines a programmable AND-OR array with output macrocells containing D flip-flops, programmable output enables, and bidirectional I/O. Logic synthesis uses sum-of-products expressions optimized by MAX+plus II or Quartus, and the JTAG/ISP chain can be expanded across multiple Classic devices for board-level test access. Typical applications include 5 V TTL glue logic replacement of PAL/GAL devices, asynchronous bus arbitration, address decoding in 8051/68k/386 designs, microprogram sequencers, peripheral controllers for ISA and STD bus cards, and industrial controller state machines where 24 macrocells and 25 ns delay are sufficient. The PLCC-32 footprint is a direct upgrade path for designers modernizing legacy bipolar PAL sockets. When designing with this device, verify the timing model against the worst-case commercial temperature range and provide adequate decoupling - the Classic family draws sharp transient currents during simultaneous output switching. Use the LC (low-power CMOS, OTP) variant for cost-sensitive production and the LI/JI variants when a windowed ceramic package is needed for development iteration. This page synthesizes distributor pricing, same-family drop-in alternatives, and design notes for engineers maintaining legacy EPLD designs or replacing obsolete bipolar PAL devices.
EP910LC-35 - 24 Macrocell Classic EPLD, 35ns | Intel/Altera
The Intel/Altera EP910LC-35 is a 24-macrocell CMOS Erasable Programmable Logic Device (EPLD) from the Classic device family, housed in a 44-pin PLCC (J-lead) package and rated at 35ns pin-to-pin propagation delay. It belongs to the EP910 series that delivers 450 usable gates with 24 macrocells and operates from a single 5V supply, making it a direct ancestor of today's CPLD and FPGA families. What is an EPLD? An Erasable Programmable Logic Device is a non-volatile programmable logic IC that uses EPROM/EEPROM storage cells to retain configuration after power-down. In the system hierarchy, EPLDs sit between discrete TTL/CMOS glue logic and modern FPGAs: they replace multiple 74-series logic packages with one re-programmable device, are slower and lower density than CPLDs/FPGAs, but offer deterministic timing and instant-on behavior. The EP910 was one of the earliest commercially successful EPLDs. The EP910LC-35 integrates 24 macrocells, each combining a programmable AND/OR array with an output register, and supports toggle rates up to 28.6 MHz at the 35ns speed grade. It is built on a CMOS EPROM process, allowing windowed (ceramic) or one-time-programmable plastic package versions to be erased via UV light. I/O pins feature programmable macrocell flip-flops with individual output enable control. The architecture follows the classic sum-of-products PLA structure: a programmable AND plane feeds a fixed OR plane, with each macrocell containing a foldback path for implementing D, T, JK, or SR flip-flop functions. Pin-to-pin delay is uniform across all paths, simplifying timing closure compared to early FPGAs. Typical applications include glue logic replacement in industrial controllers, address decoding for legacy 8/16-bit microprocessor buses (8086, 68k, Z80), bus arbitration, state-machine controllers, and educational CPLD prototyping. It was widely designed into telecommunications, military, and aerospace systems in the late 1980s and 1990s. When designing with this device, verify timing closure against the 35ns worst-case propagation delay at 5V, ensure adequate decoupling on VCC, and use a programmer such as the Altera Logic Programmer or compatible third-party tools. Modern designs are strongly encouraged to migrate to MAX II/MAX V CPLDs for cost, density, and active lifecycle support. This page synthesizes Rochester Electronics authorized-stock data, Altera legacy datasheet parameters, drop-in alternatives from the same EP910 Classic family, and practical design guidance not found in any single distributor listing.