GAL22V10D-10LJ

Programmable Logic Device Pld Overview

The GAL22V10D-10LJ is a discontinued Simple Programmable Logic Device (SPLD) manufactured by Lattice Semiconductor. It utilizes E2CMOS technology and features ten Output Logic Macrocells (OLMCs). The device operates within a supply voltage range of 4.75 V to 5.25 V and supports a maximum propagation delay of 10 ns. It is housed in a 28-pin PLCC package and is rated for commercial ambient temperatures between 0°C and +75°C.

Programmable Logic Device Pld Feature Summary

• E2CMOS Technology: Electrically erasable floating gate architecture with high-speed electrical erasure (<100ms) and 20-year data retention.
• Ten OLMCs: Provides flexible registered or combinatorial I/O configurations with individual product-term driven tri-state control.
• Active Pull-ups: Built-in active pull-up circuits on all pins ensure floating inputs default to a logic high state.
• Electronic Signature: Includes 64 bits of user-programmable memory for identification, revision tracking, or inventory 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

All devices in the GAL22V10 family have been officially discontinued per Product Change Notification PCN#13-10. Verification of current availability requires checking authorized distributors or secondary market suppliers such as Rochester Electronics. Compliance with RoHS standards depends on specific ordering suffixes; standard versions may not be compliant.

Programmable Logic Device Pld Selection Notes

Select the GAL22V10D-10LJ when a 10 ns speed grade is required for designs compatible with standard bipolar 22V10 fuse maps. Ensure the application environment remains within the commercial temperature range of 0°C to +75°C. Verify that the 28-pin PLCC package fits the target PCB footprint and that programming equipment supports the E2CMOS architecture.

Programmable Logic Device Pld Part Context

This component belongs to the GAL22V10 series, which offers full function, fuse-map, and parametric compatibility with standard bipolar and UVCMOS 22V10 devices. The 'D' indicates the device variant, '10' specifies the 10 ns speed grade, 'L' denotes low power consumption, and 'J' identifies the 28-lead PLCC package.

Programmable Logic Device Pld Replacement Considerations

Public confirmed substitute part numbers include GAL22V10D-10LP, GAL22V10D-10QJ, and GAL22V10D-10LS. These variants share the same core functionality but differ in package type or power characteristics.

Programmable Logic Device Pld FAQ

How does the GAL22V10 handle unused inputs?

The device features built-in active pull-ups on all pins, causing floating inputs to default to a logic high state. However, connecting unused inputs to an adjacent active input, Vcc, or ground is recommended to improve noise immunity and reduce operating current.

What is the purpose of the Electronic Signature feature?

The Electronic Signature provides 64 bits of reprogrammable memory available regardless of the security cell state. It is used for storing user-defined data such as ID codes, revision numbers, or inventory control information.

How are registers initialized during power-up?

Circuitry within the device provides an internal register reset signal during power-up. All internal registers are set to a logic low Q output within a maximum time (tpr) of 1μs, provided the Vcc rise is monotonic and the clock input is at a static TTL level.