GAL20V8B-25LP

Programmable Logic Device Pld Overview

The GAL20V8B-25LP is a discontinued high-performance Electrically Erasable Programmable Logic Device (PLD) manufactured by Lattice Semiconductor. It utilizes E2CMOS technology and features an industrial temperature range of -40°C to +85°C with a 5V supply voltage. The device provides 10 dedicated inputs, 8 I/O lines, and 8 Output Logic Macrocells within a 24-pin Plastic DIP package. Key electrical parameters include a maximum propagation delay of 25 ns, a typical operating current of 75 mA for the Low Power variant, and a maximum clock frequency of 37 MHz.

Programmable Logic Device Pld Feature Summary

• E2CMOS Technology: Features reprogrammable cells with 100 erase/write cycles and over 20 years data retention.
• Flexible Architecture: Supports Registered, Complex, and Simple OLMC modes to emulate various PAL architectures.
• Active Pull-ups: Includes active pull-up resistors on all pins to reduce external component requirements.
• Electronic Signature: Contains 64 bits of user-reprogrammable memory for identification or revision tracking.

Programmable Logic Device Pld Applications

• DMA Control
• State Machine Control
• High Speed Graphics Processing
• Standard Logic Speed Upgrade

Programmable Logic Device Pld Procurement Notes

This part number is officially discontinued per Product Change Notification PCN#13-10. No new production units are available from Lattice Semiconductor. Verification of availability requires checking third-party distributors for existing inventory or contacting authorized liquidation partners such as Rochester Electronics.

Programmable Logic Device Pld Selection Notes

Select this device only if legacy compatibility with specific PAL fuse maps is required. The 'L' suffix indicates Low Power consumption (75 mA typical), while '25' denotes the 25 ns speed grade. Ensure designs account for the 24-pin DIP footprint and verify that compiler software supports the GAL20V8 device type for proper architecture bit configuration.

Programmable Logic Device Pld Part Context

The GAL20V8B belongs to the Generic Array Logic family, designed to replace standard bipolar PAL devices with CMOS flexibility. The 'B' designation identifies it as an industrial-grade device. This series allows designers to utilize complex logic structures in a pin-compatible form factor with traditional PALs.

Programmable Logic Device Pld Replacement Considerations

Public confirmed substitute part numbers are not provided in the source material. Discontinued status necessitates evaluating modern CPLD or FPGA alternatives based on functional equivalence and pinout compatibility.

Programmable Logic Device Pld FAQ

What is the maximum clock frequency for the GAL20V8B-25LP?

The maximum clock frequency is 37 MHz when using internal feedback.

How many product terms are available per output in registered mode?

Registered outputs have eight product terms per output, while I/O configurations have seven product terms per output.

Can pins 1 and 13 be used as dedicated inputs?

No, in registered mode, pins 1 and 13 are permanently configured as Clock and Output Enable, respectively.