49C402GB

Overview

The IDT49C402GB is a 16-bit bit-slice microprocessor manufactured by Integrated Device Technology. It operates on a single core with a maximum clock frequency of 28 MHz and supports a 5V power supply. The device features a 16-bit external data bus and utilizes a CQFP68 or PGA package with 68 pins. It is designed for military-grade applications, functioning within an extended temperature range of -55°C to 125°C.

Feature Summary

• Supports 16-bit bit-slice processing architecture
• Includes a 64x16 bit dual port register file
• Features a 10-bit instruction decoder
• Capable of cascading for wider data configurations

Applications

• Military embedded systems requiring high reliability
• Industrial control architectures using legacy 16-bit buses
• Aerospace computing modules operating in extreme temperatures

Procurement Notes

Verify the specific suffix (e.g., GB) against official datasheets to confirm pinout and voltage compatibility. Ensure the component meets MIL-STD-883 Class B requirements if used in defense applications. Confirm RoHS status as older variants may not be compliant. Cross-reference lead times and availability with authorized distributors due to potential end-of-life status.

Selection Notes

Select this component when a 16-bit bit-slice processor is required for modular system expansion. Consider the 28 MHz speed limit and 5V logic levels for interface compatibility. Evaluate the need for military temperature ratings (-55°C to 125°C) versus commercial grades. Ensure the design accommodates the specific 68-pin flatpack or PGA footprint constraints.

Part Context

This part belongs to the IDT 49C402 family of bit-slice processors. These components are often used in conjunction with other slice units to build custom-width processors. The 49C402GB variant specifically denotes the military-grade version with enhanced environmental specifications compared to commercial counterparts.

Replacement Considerations

Check for direct functional equivalents from Renesas or IDT's successor lines. Verify pin-to-pin compatibility before substitution. Ensure the replacement supports the same 16-bit architecture and voltage levels.