PAL16R4A4CNL

Programmable Logic Device Pld Overview

The PAL16R4A4CNL is a Programmable Array Logic (PAL) device manufactured by Advanced Micro Devices. It belongs to the PAL20L8/PAL20R8 family, featuring 16 inputs and 4 registered outputs. The component operates with TTL voltage levels and utilizes a 28-pin Plastic Quad Flat Package (PQCC). Key electrical specifications include a maximum propagation delay of 25 ns and a maximum clock frequency of 25 MHz. The device supports mixed output functions and is designed for high-speed digital logic applications requiring fixed-function programmability.

Programmable Logic Device Pld Feature Summary

• 16 dedicated inputs and 4 registered outputs providing flexible logic implementation
• 25 ns maximum propagation delay suitable for high-speed timing requirements
• TTL-compatible input and output voltage levels
• 28-pin PQCC package with plastic leaded chip carrier construction

Programmable Logic Device Pld Applications

• High-speed state machine implementations
• Address decoding logic in memory systems
• Control signal generation for peripheral interfaces
• Replacement for fixed-gate array logic in legacy designs

Programmable Logic Device Pld Part Context

This component is part of the AMD PAL20 series, which includes variants like PAL20R6 and PAL16R8. These devices were widely used in the 1980s and 1990s for replacing complex discrete logic gates. The 'A' suffix typically denotes an improved speed grade or revision within the standard PAL product line.

Programmable Logic Device Pld Replacement Considerations

Direct pin-to-pin replacements may be available from manufacturers such as Lattice Semiconductor (e.g., LCE16V8) or Texas Instruments (e.g., PAL16R4), though programming tools and fuse maps must be verified. CMOS-based equivalents require careful attention to voltage level compatibility and drive strength differences.