GAL20V8B-15LPN

Programmable Logic Device Pld Overview

The GAL20V8B-15LPN is a discontinued high-performance Electrically Erasable Programmable Logic Device (PLD) manufactured by Lattice Semiconductor. It utilizes E2CMOS technology to provide a maximum propagation delay of 15 ns and a maximum operating frequency of 45.5 MHz. The device features eight Output Logic Macrocells (OLMCs), 18 dedicated inputs, and 8 I/O lines within a 24-pin Plastic DIP package. It operates on a single +5V supply with typical current consumption of 75 mA for the low-power variant. The architecture supports registered, complex, and simple modes, allowing emulation of various PAL devices.

Programmable Logic Device Pld Feature Summary

• E2CMOS Technology: Offers reprogrammable cells with high-speed electrical erasure (<100ms) and over 20 years data retention.
• Flexible OLMC Architecture: Supports Registered, Complex, and Simple modes with programmable output polarity and active pull-ups.
• PAL Emulation: Compatible with standard 24-pin PAL fuse maps and parametric specifications.
• Electronic Signature: Includes 64 bits of user-reprogrammable memory for 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. No new production units are available from Lattice Semiconductor. Verification of availability requires checking secondary market distributors or authorized liquidation partners such as Rochester Electronics for existing inventory.

Programmable Logic Device Pld Selection Notes

Select this device only for legacy system maintenance where specific pinouts and timing characteristics match existing designs. The -15 suffix indicates a 15 ns speed grade. Ensure the design accommodates the 24-pin DIP footprint and verify that the 45.5 MHz maximum clock frequency meets system requirements.

Programmable Logic Device Pld Part Context

The GAL20V8B series belongs to Lattice's Generic Array Logic family, designed to replace obsolete bipolar PAL devices. The 'B' denotes the industrial/commercial grade variant using E2CMOS technology, while the 'LP' suffix specifies Low Power consumption. This part serves as a direct functional replacement for many standard 24-pin PAL architectures.

Programmable Logic Device Pld Replacement Considerations

No direct modern equivalents exist within the active Lattice portfolio due to discontinuation. Designers must evaluate migration to modern CPLDs or FPGAs, which may require schematic redesign and pinout adaptation rather than simple drop-in substitution.

Programmable Logic Device Pld FAQ

What does the 'PN' suffix indicate in the part number?

The 'PN' suffix denotes a lead-free Plastic DIP package option.

Can the GAL20V8B-15LPN be used as a direct replacement for a 20R8 PAL?

Yes, the device can emulate 20R8 architectures when configured in Registered mode, maintaining full function and parametric compatibility.

What is the maximum clock frequency for this device?

The maximum clock frequency is 45.5 MHz, calculated based on setup time and clock-to-output delay constraints.