PAL16R8B4CNL

Programmable Logic Device Pld Overview

The PAL16R8B4CNL is a Programmable Array Logic (PAL) device manufactured by Vantis Corporation. It belongs to the PAL16R8 family, featuring an OT PLD architecture with TTL input compatibility and registered outputs. The component utilizes a 20-pin Plastic Quad Flatpack (PQFP) or similar surface-mount package variant indicated by the 'NL' suffix in related datasheets, though specific pinout details for this exact suffix require manufacturer verification. It operates at a maximum clock frequency of 25 MHz with a propagation delay of 25 ns. The device supports 8 inputs and 8 registered outputs, powered by a nominal 5 V supply. It is designed for high-speed digital logic applications requiring fixed-function programmability.

Programmable Logic Device Pld Feature Summary

• PAL-type architecture with 64 product terms
• Registered output configuration for synchronous logic
• 25 ns typical propagation delay
• TTL-compatible inputs

Programmable Logic Device Pld Applications

• Synchronous state machine implementation
• Address decoding circuits
• Bus protocol control logic
• Data path multiplexing

Programmable Logic Device Pld Procurement Notes

Verify the specific package type and pinout against the official Vantis datasheet, as suffixes like 'CNL' may denote specific tape-and-reel packaging or temperature grades not explicitly detailed in generic summaries. Confirm RoHS compliance status, as older PAL devices often lack modern environmental certifications. Ensure programming equipment compatibility with standard PAL16R8 fuse maps.

Programmable Logic Device Pld Selection Notes

Select this component when registered outputs are required for timing closure in designs operating up to 25 MHz. Compare with PAL16R8 variants offering combinational outputs if synchronous storage is unnecessary. Verify voltage levels match the system's 5 V logic standards. Consider pin-count constraints as the 20-pin package limits I/O availability compared to larger PLDs.

Programmable Logic Device Pld Part Context

The PAL16R8 series represents a generation of field-programmable logic devices widely used before the dominance of CPLDs and FPGAs. Vantis Corporation, formed from the acquisition of Lattice Semiconductor's PAL business, continues to support these legacy parts. The PAL16R8B4CNL is a specific variant within this lineage, maintaining backward compatibility with original PAL16R8 functionality while potentially offering updated manufacturing processes or packaging options.

Programmable Logic Device Pld Replacement Considerations

Direct pin-to-pin replacements include other manufacturers' PAL16R8 equivalents such as those from AMD or Atmel, provided the electrical characteristics match. For upgrades, consider CPLDs like the EPM7128 for increased macrocells and reprogrammability, though pinouts and software tools will differ significantly.