GAL16V8D-25QPNI

Programmable Logic Device Pld Overview

The GAL16V8D-25QPNI is a discontinued Generic Array Logic device from Lattice Semiconductor, utilizing high-performance E2CMOS technology. It features 16 inputs and 8 output pins within a 20-pin Quad Plastic Leadless Carrier (QPLCC) package. The -25 speed grade specifies a maximum propagation delay of 25 ns and a maximum operating frequency of 41.6 MHz. The device operates on a single +5V supply with typical current consumption of 45 mA for the quarter-power variant. It supports Electrically Erasable and Programmable logic with active pull-ups on all pins.

Programmable Logic Device Pld Feature Summary

• E2CMOS Technology: Features electrically erasable floating gate cells allowing over 100 erase/write cycles and 20-year data retention.
• Flexible OLMC Architecture: Supports Registered, Complex, and Simple modes to emulate various PAL architectures like 16R8 or 16P8.
• Active Pull-Ups: All pins include active pull-up resistors to minimize leakage current and improve noise immunity.
• Electronic Signature: Includes 64 bits of reprogrammable memory for user-defined identification codes 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 component has been officially discontinued by Lattice Semiconductor per Product Change Notification PCN#13-10. No new units are manufactured. Verification of authenticity is critical when sourcing from secondary markets, as availability is limited to existing stock or surplus inventory.

Programmable Logic Device Pld Selection Notes

Select this part only if legacy compatibility with specific PAL fuse maps is required. The -25 suffix indicates a 25 ns delay; faster alternatives in the same family include the -7 or -10 grades. Ensure the design accommodates the 20-pin QPLCC footprint and verify that the 41.6 MHz maximum clock frequency meets system timing requirements.

Programmable Logic Device Pld Part Context

The GAL16V8D series represents Lattice's transition to CMOS-based programmable logic, offering significantly lower power consumption compared to older bipolar PLDs. The 'D' suffix denotes the specific generation of the architecture, while the 'QPNI' ordering suffix identifies the Quarter Power speed grade, Plastic/Lead-free packaging, and Industrial temperature rating.

Programmable Logic Device Pld Replacement Considerations

No direct functional replacements are listed in the official documentation. Designers must evaluate modern CPLDs or FPGAs for pin-compatible or functionally equivalent upgrades, noting that architectural differences exist between GALs and contemporary programmable logic devices.

Programmable Logic Device Pld FAQ

What does the 'I' suffix indicate in the model number?

The 'I' suffix designates the Industrial temperature grade, which supports an ambient operating temperature range of -40°C to +85°C.

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

In Registered mode, registered outputs utilize eight product terms per output, while I/O configurations utilize seven product terms per output.

Can Pins 1 and 11 be used as dedicated inputs in Registered mode?

No. In Registered mode, Pin 1 is permanently configured as the common Clock input and Pin 11 is permanently configured as the common Output Enable input.