GAL20V8B-25LPNI

Programmable Logic Device Pld Overview

The GAL20V8B-25LPNI is a discontinued high-performance Electrically Erasable Programmable Logic Device (PLD) from the Generic Array Logic family. It utilizes E2CMOS technology to provide reconfigurable logic with 100% tested yields and over 20 years of data retention. The device features eight Output Logic Macrocells (OLMCs), active pull-ups on all pins, and supports registered, complex, and simple configuration modes. It operates within a supply voltage range of +4.50V to +5.50V for industrial grades and has a maximum propagation delay of 25 ns.

Programmable Logic Device Pld Feature Summary

• E2CMOS Technology: Offers high-speed electrical erasure (<100ms), reprogrammable cells, and 100 erase/write cycles.
• Flexible Architecture: Supports Registered, Complex, and Simple OLMC modes to emulate various PAL architectures.
• Active Pull-ups: All pins feature active pull-up resistors to ensure defined states.
• Electronic Signature: Includes 64 bits of reprogrammable memory for user identification or revision control.

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 component is officially discontinued per Product Change Notification (PCN) #13-10. Original manufacturing by Lattice Semiconductor has ceased. Verification of availability requires checking secondary market distributors or authorized liquidation partners such as Rochester Electronics. No new production units are available directly from the manufacturer.

Programmable Logic Device Pld Selection Notes

Select this device only for legacy system maintenance where specific pinout and timing characteristics of the GAL20V8B series are required. The -25 speed grade indicates a maximum propagation delay of 25 ns. Ensure design compatibility with the 5V supply voltage and verify that the target application does not require RoHS compliance if the original package was not lead-free, although lead-free options existed in the family.

Programmable Logic Device Pld Part Context

The GAL20V8B belongs to the second generation of Generic Array Logic devices from Lattice Semiconductor. It serves as a drop-in replacement for many standard PAL devices while offering the advantage of electrical erasability. The 'B' suffix denotes the industrial temperature grade variant, and 'LPNI' specifies the Low Power version in a Plastic DIP package with lead-free construction.

Programmable Logic Device Pld Replacement Considerations

As the device is discontinued, direct substitutes are unavailable from Lattice. Designers should evaluate modern CPLD families such as the LatticeMACHxo2 or MACHXO3L for functional equivalents. Cross-referencing with other manufacturers' GAL-compatible PLDs may be necessary for immediate hardware replacements.

Programmable Logic Device Pld FAQ

What is the maximum propagation delay for the GAL20V8B-25LPNI?

The maximum propagation delay (tpd) for the -25 speed grade is 25 ns when switching 8 outputs.

How many Output Logic Macrocells (OLMCs) does this device contain?

The GAL20V8B contains eight Output Logic Macrocells, which can be configured as dedicated outputs, inputs, or I/O functions depending on the selected mode.

Is the GAL20V8B-25LPNI currently in production?

No, all devices in the GAL20V8 datasheet, including this part number, have been discontinued according to PCN #13-10 issued in September 2010.