EPM5128GC-1 - 128-Macrocell CPLD, 62.5MHz, 5V MAX 5000 | Altera
MPN: EPM5128GC-1 ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $38.5 | $38.50 |
| 10 | $32.75 | $327.50 |
| 100 | $27.4 | $2,740.00 |
| 500 | $22.1 | $11,050.00 |
| 1,000 | $18.95 | $18,950.00 |
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View Datasheet →EPM5128GC-1 Maximum Ratings & Electrical Characteristics
| Family | MAX 5000 |
| Device Type | UV-erasable CMOS CPLD |
| Macrocells | 128 |
| Usable Gates | 2,500 |
| Dedicated Inputs | 7 |
| Maximum User I/O Pins | 52 |
| Nominal Supply Voltage | 5 V |
| Supply Voltage Range | 4.75 V to 5.25 V |
| Maximum Operating Frequency | 62.5 MHz |
| Propagation Delay (tPD) | 16 ns (typical, -1 speed grade) |
| Package | PGA-96+ (Pin Grid Array, ceramic windowed) |
| Technology | CMOS, UV-erasable EPROM |
| Operating Temperature | -40C to +85C (industrial) |
| Security Bit | Programmable, prevents readback |
| Programming Method | UV erase + EPROM program (or device programmer) |
EPM5128GC-1 pga-96+ (pin grid array, ceramic windowed) Pin Configuration Guide
Complete pinout information for EPM5128GC-1 (pga-96+ (pin grid array, ceramic windowed) package) with 52 pins. This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for EPM5128GC-1.
Refer to the datasheet for full pin configuration.
Estimated pin count: 52 pins (digital package)
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this digital IC. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
EPM5128GC-1 is suitable for 6 applications: 5V Bus Address Decoding & Glue Logic, Programmable State Machine Controllers, Peripheral Controller (UART / Timer / PWM), Legacy TTL Replacement Board Consolidation, Industrial 5V Sensor Interface Bridge, Retrocomputing & Vintage Hardware Restoration.
5V Bus Address Decoding & Glue Logic
The EPM5128GC-1's 128 macrocells, 52 user I/O pins, and 4.75-5.25V supply tolerance make it ideal for legacy 5V microprocessor bus address decoding. In a typical application it replaces 8-12 discrete 74LS138/74LS139 decoders and 74LS32/74LS08 gates with a single reconfigurable part, freeing PCB area while delivering 62.5 MHz decode speed with a 16 ns tPD. Combined with its deterministic pin-locked timing, engineers can decode 24-bit address spaces with sub-20 ns CS assertion - critical for zero-wait-state memory interfaces on 68000, 8086, or V40 embedded CPUs. The -40C to +85C industrial temperature range supports harsh-environment retrofits.
Recommended
Programmable State Machine Controllers
The 128 macrocells of the EPM5128GC-1 comfortably hold 20-30 state variables with rich transition logic, making it a strong fit for industrial programmable state machines. In a typical conveyor or process controller the part drives 24V opto-isolated outputs, sequences pneumatic actuators, and reads back sensor inputs - all under deterministic 16 ns tPD timing. Unlike SRAM-based FPGAs the MAX 5000 CPLD boots instantly with no configuration memory, ensuring fail-safe startup. Engineers typically pair it with a 5V supervisor and a watchdog timer for safety-critical automation.
Recommended
Peripheral Controller (UART / Timer / PWM)
With 128 macrocells and 62.5 MHz clocking, the EPM5128GC-1 can synthesize a 16550-style UART, multiple 16-bit timers, and PWM channels - replacing 2-3 dedicated peripheral ICs on legacy motherboards. The 5V tolerant I/O directly interfaces to RS-232 transceivers and TTL peripherals without level shifters. Designers can use Altera MAX+PLUS II to capture the design as schematics or AHDL, then program the part once via UV or device programmer. This application is common in industrial PCs, embedded SBCs, and test-instrument front panels where software drivers are undesirable.
Recommended
Legacy TTL Replacement Board Consolidation
The EPM5128GC-1 was originally designed to consolidate racks of 74LS/74HC TTL on a single 5V CPLD, and that use case remains relevant today for legacy board repair. A single EPM5128GC-1 can replace up to ~30 SSI/MSI TTL packages (decoders, multiplexers, flip-flops, latches) on a 5V logic board, simplifying rework and improving noise margins. The 7 dedicated inputs and 52 I/O pins provide ample headroom for board-level fan-out. Operating from a 4.75-5.25V supply it tolerates legacy 5V power rails that have drifted with age.
Recommended
Industrial 5V Sensor Interface Bridge
The EPM5128GC-1's 5V I/O tolerance and 128 macrocells make it well suited to bridge 5V industrial sensors (limit switches, encoders, 24V opto-isolated signals) to 3.3V downstream controllers via a simple external level shifter. Each macrocell can implement a Schmitt-trigger input filter or a pulse-stretching circuit, eliminating analog glue components. With 62.5 MHz fMAX and 16 ns tPD, the part handles 100 kHz+ encoder quadrature decoding without breaking a sweat. Industrial temperature rating (-40C to +85C) suits factory-floor deployment.
Recommended
Retrocomputing & Vintage Hardware Restoration
The EPM5128GC-1 is prized by retrocomputing enthusiasts for restoring 1980s-1990s 5V motherboards - it can emulate long-obsolete discrete logic in vintage PCs, arcade boards, and classic industrial controllers. Its UV-erasable window allows re-programming during iterative bring-up, and PGA-96+ ceramic form factor matches the original Altera MAX 5000 sockets used in early engineering workstations. Hobbyists and refurbishment houses treat the part as a scarce commodity. With only 128 macrocells and 16 ns tPD, it is overkill for many restoration jobs but ideal for full-board chipset reconstruction.
Recommended
Recommended Products Summary
Engineering reference data for EPM5128GC-1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | EPM5128GC | EPM5064LC-1 | EPM5064LC | EPM5064LC-2 | EPM5064JC-1 | EPM5064JC |
|---|---|---|---|---|---|---|---|
| Brand | Altera | Altera | Altera | Altera | Altera | Altera | Altera |
| Package | PGA-96+ (ceramic, windowed) | PGA-96+ (ceramic, windowed) - same | PGA-96+ (ceramic, windowed) - same | PGA-96+ (ceramic, windowed) - same | PGA-96+ (ceramic, windowed) - same | PGA-96+ (ceramic, windowed) - same | PGA-96+ (ceramic, windowed) - same |
| Macrocells | 128 | 128 | 64 | 64 | 64 | 64 | 64 |
| Usable Gates | 2,500 | 2,500 | 1,250 | 1,250 | 1,250 | 1,250 | 1,250 |
| Speed Grade | -1 (62.5 MHz / 16 ns tPD) | Standard (no suffix, slower) | -1 (62.5 MHz) | Standard (slower) | -2 (faster than -1) | -1 (62.5 MHz) | Standard (slower) |
| Supply Voltage | 4.75 V to 5.25 V | 4.75 V to 5.25 V | 4.75 V to 5.25 V | 4.75 V to 5.25 V | 4.75 V to 5.25 V | 4.75 V to 5.25 V | 4.75 V to 5.25 V |
| Technology | CMOS, UV-erasable EPROM | CMOS, UV-erasable EPROM | CMOS, UV-erasable EPROM | CMOS, UV-erasable EPROM | CMOS, UV-erasable EPROM | CMOS, UV-erasable EPROM | CMOS, UV-erasable EPROM |
| Maximum User I/O Pins | 52 | 52 | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete |
Key Differentiators
- Highest macrocell density in the legacy MAX 5000 PGA-96+ family (vs EPM5064LC-1)
- -1 speed grade delivers 62.5 MHz / 16 ns tPD performance (vs EPM5128GC (no suffix))
- Ceramic windowed PGA-96+ supports iterative UV-erase development (vs EPM5128LC (plastic equivalent))
- 5V supply tolerance interfaces directly to legacy TTL rails (vs Modern MAX V (5M80ZE64C5N) CPLDs)
Design Notes
The EPM5128GC-1 draws its core current from a single 5V rail (4.75-5.25V) and produces transient current spikes during simultaneous macrocell switching. Per Altera MAX 5000 datasheet, place a 0.1 uF ceramic decoupling capacitor within 5 mm of every VCC/GND pin pair, plus a bulk 10-47 uF tantalum or electrolytic capacitor at the package supply entry. Estimate: with 52 outputs switching at 1 MHz, dynamic current can reach 100-150 mA peaks - the bulk capacitor must source this without rail collapse. Use a ground plane rather than a ground pour to control return-current loops.
The PGA-96+ ceramic pin-grid package requires a matching through-hole PGA socket on the PCB - SMD reflow is impossible. Per the MAX 5000 datasheet, the pin pitch is 2.54 mm (100 mil) standard DIP-grid. Provide a generous keep-out zone around the ceramic body for the quartz erasure window: a UV eraser lamp head must be able to seat flush against the package top. For production boards migrate to the plastic PGA-68/PLCC-84 equivalents of the same die to avoid the ceramic windowed form factor cost.
Two pitfalls recur in legacy MAX 5000 designs. First, designers confuse speed-grade suffixes: -1 is the FASTEST 62.5 MHz grade, -2 is faster still, and no suffix or -3 is the slowest. Second, the ceramic PGA package cannot be reworked with hot air - any failed programming or erase cycle requires full socket extraction and replacement. Per Altera documentation, always verify the programmed pattern by reading back BEFORE setting the security bit, because once the bit is set no further readback is possible and a UV erase cycle is required for any change.
The EPM5128GC-1 outputs swing 0-5V CMOS at moderate edge rates; combined with PGA-96+ long-pin inductance, ringing can occur on unterminated traces longer than ~50 mm. Per Altera application notes, series-dampening 33-47 ohm resistors on clock and high-fanout outputs typically resolve this. Estimate: with 5 ns edge rates and a 100 mm trace of ~10 nH/inch inductance, the source-impedance mismatch can produce 20-30% overshoot. Keep clock traces short and use a ground-return path directly beneath each clock line.
Compliance Information
Ceramic PGA-96+ EPM5128GC-1 is a legacy 1990s Altera part with no public RoHS/REACH compliance documentation in the verified web data. Lead-based ceramic packages typically fail modern RoHS requirements; if RoHS compliance is mandatory, request documentation from the broker or migrate to a plastic equivalent.
