PAL20L8-7JC

Programmable Logic Device Pld Overview

The PAL20L8-7JC is a Complex Programmable Logic Device (CPLD) manufactured by Vantis Corporation. It utilizes the MACH architecture, featuring a Central Switch Matrix and programmable logic arrays. The device operates at a maximum clock frequency of 7 MHz with a propagation delay of 7 ns. It provides 19 input lines and 8 registered output lines within a 24-pin PLCC package. The component is designed for TTL logic levels and requires a nominal 5V power supply.

Programmable Logic Device Pld Feature Summary

• MACH Architecture: Utilizes a Central Switch Matrix for flexible interconnectivity between logic blocks.
• Registered Outputs: Features 8 registered outputs to support synchronous design applications.
• High Density: Offers 19 inputs and 8 outputs in a compact 24-pin PLCC package.
• Speed Grade: Delivers a 7 ns propagation delay suitable for moderate-speed digital logic.

Programmable Logic Device Pld Applications

• Synchronous state machine implementation
• Address decoding in microprocessor systems
• Bus interface control logic
• Replacement for legacy PAL devices in existing hardware

Programmable Logic Device Pld Part Context

The PAL20L8-7JC belongs to the MACH family of CPLDs produced by Vantis (formerly AMD). This series introduced the Central Switch Matrix, allowing for more complex routing than traditional PALs. The '7' suffix denotes the 7 ns speed grade, while 'JC' indicates the 24-pin PLCC package type. These devices bridge the gap between simple PALs and larger FPGAs.

Programmable Logic Device Pld Replacement Considerations

Direct pin-to-pin replacements may include other MACH family members like the PAL20L8-10JC or PAL20L8-15JC, though these offer slower speeds. Cross-family replacements from Lattice or Atmel require careful verification of I/O voltage levels and logic density compatibility.