GAL18V10B-20LP

Programmable Logic Device Pld Overview

The GAL18V10B-20LP is a discontinued high-performance CMOS Programmable Logic Device (PLD) from Lattice Semiconductor. It utilizes E2CMOS technology, offering reconfigurable logic with 100% tested yields and 20-year data retention. The device features ten Output Logic Macrocells (OLMCs) based on the standard 22V10 architecture, supporting registered and combinatorial I/O modes. Key electrical specifications include a maximum propagation delay of 20 ns, a typical supply current of 75 mA, and TTL-compatible 16 mA outputs. It operates within a commercial temperature range of 0°C to +75°C at a supply voltage of +4.75V to +5.25V.

Programmable Logic Device Pld Feature Summary

• E2CMOS Technology: Features high-speed electrical erasure (<100ms), 100 erase/write cycles, and 20-year data retention.
• Flexible OLMC Architecture: Ten macrocells compatible with standard 22V10 designs, allowing individual configuration for registered or combinatorial modes.
• TTL Compatible Outputs: Provides 16 mA low-level output current and active pull-ups on all pins to prevent floating inputs.
• Built-in Testability: Includes asynchronous reset and synchronous preset product terms common to all registers, plus an electronic signature for identification.

Programmable Logic Device Pld Applications

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

Programmable Logic Device Pld Procurement Notes

All devices in the GAL18V10 datasheet have been officially discontinued per Product Change Notification (PCN) #06-07. The GAL18V10B-20LP specifically is listed as discontinued. Verification of availability requires contacting authorized distributors such as Rochester Electronics for potential remaining inventory. No new production is confirmed.

Programmable Logic Device Pld Selection Notes

Select this component only for legacy design maintenance where the specific 20-pin DIP/PLCC package and 22V10-compatible macrocell architecture are required. Ensure the system supports the 5V supply voltage and 75 mA typical operating current. Verify that the 20 ns speed grade meets timing requirements, noting that faster variants like the -7LJ or -10LP exist but are also discontinued.

Programmable Logic Device Pld Part Context

The GAL18V10 belongs to Lattice's Generic Array Logic (GAL) family, designed to replace complex bipolar logic gates with flexible, reprogrammable CMOS alternatives. It builds upon the popular 22V10 architecture to minimize the learning curve for designers migrating from older technologies. The device represents a transition point in PLD history, combining electrically erasable memory with high-density logic capabilities.

Programmable Logic Device Pld Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation due to the discontinuation status. Designers should consult Lattice Semiconductor or authorized partners like Rochester Electronics for cross-reference recommendations or modern FPGA/CPLD equivalents suitable for legacy replacements.