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The PALCE26V12H-20JC/4 is a Programmable Array Logic (PAL) device manufactured by AMD (Advanced Micro Devices). Below are its key specifications, descriptions, and features:

Specifications:

• Device Type: PAL (Programmable Array Logic)
• Technology: Electrically Erasable CMOS (EECMOS)
• Speed Grade: -20 (20 ns maximum propagation delay)
• Package: PLCC-28 (JC) (Plastic Leaded Chip Carrier, 28-pin)
• Operating Voltage: 5V (Standard TTL-compatible)
• Operating Temperature: Commercial range (0°C to +75°C)
• Number of Inputs: 26
• Number of Outputs: 12
• Programmable AND Array, Fixed OR Array
• Security Fuse: Prevents unauthorized copying

Descriptions:

• The PALCE26V12H is a high-performance, electrically erasable programmable logic device (PLD) designed for general-purpose logic applications.
• It features a flexible AND-OR architecture, allowing users to implement complex combinational and registered logic functions.
• The -20JC/4 variant indicates a 20 ns speed grade in a PLCC-28 package.

Features:

• Electrically Erasable: Reprogrammable for design flexibility.
• High-Speed Operation: 20 ns propagation delay for fast logic implementation.
• Low Power Consumption: CMOS technology ensures efficient power usage.
• TTL-Compatible Inputs/Outputs: Ensures easy interfacing with standard logic families.
• Security Fuse: Protects intellectual property by preventing readback.
• Wide Availability: Obsolete but may still be available through distributors.

This device was commonly used in digital logic designs, such as state machines, address decoding, and bus interfacing.

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