GAL16V8D-25QJN

Programmable Logic Device Pld Overview

The GAL16V8D-25QJN is a discontinued Electrically Erasable Programmable Logic Device (PLD) from Lattice Semiconductor. It utilizes E2CMOS technology and features an architecture of 16 inputs, 8 outputs, and 64 product terms. The device operates at a maximum propagation delay of 25 ns and supports a maximum clock frequency of 37 MHz. It is housed in a 20-pin PLCC package with lead-free construction. The part includes eight Output Logic Macrocells (OLMCs) configurable for registered, complex, or simple modes.

Programmable Logic Device Pld Feature Summary

• E2CMOS Technology: Supports high-speed electrical erasure under 100ms and specifies data retention exceeding 20 years.
• Reconfigurable Architecture: Features eight OLMCs that emulate standard PAL architectures with full function and parametric compatibility.
• Programmable Electronic Signature: Includes 64 bits of reprogrammable memory for user-defined identification codes.
• Latch-Up Protection: Designed with n-channel pull-ups and an on-board charge pump to minimize latch-up risks.

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 the manufacturer. Verification of authenticity is critical when sourcing from secondary markets, as availability is limited to existing inventory.

Programmable Logic Device Pld Selection Notes

Select this part only if legacy compatibility with specific PAL fuse maps is required. The -25 speed grade offers a 25 ns maximum propagation delay. Ensure the design accommodates the 20-pin PLCC footprint and verify that the 37 MHz maximum operating frequency meets system timing requirements.

Programmable Logic Device Pld Part Context

The GAL16V8D series represents Lattice's Generic Array Logic line built on E2CMOS processes. This specific model belongs to the commercial grade subset within the broader GAL16V8 family, which also includes industrial variants and different speed grades ranging from 3 ns to 25 ns.

Programmable Logic Device Pld Replacement Considerations

Public confirmed substitute part numbers are not provided in the source documentation due to the discontinuation status. Designers should consult official replacement guides for modern FPGA or CPLD equivalents.

Programmable Logic Device Pld FAQ

What is the maximum clock frequency for the GAL16V8D-25QJN?

The maximum clock frequency is 37 MHz, calculated based on external feedback constraints involving setup time and clock-to-output delay.

How many product terms does each macrocell have?

In registered mode, registered outputs have eight product terms per output, while I/O configurations have seven. In complex and simple modes, macrocells utilize up to eight product terms.

Can the GAL16V8D-25QJN emulate other PAL devices?

Yes, it emulates various 20-pin PAL architectures, including 16R8, 16L8, and 10L8, with full function, fuse map, and parametric compatibility.