CD82C237-12

Specialized Overview

The CD82C237-12 is a CMOS high-performance programmable DMA controller manufactured by Harris Corporation. It supports 16-bit address buses and 8-bit external data buses, with a maximum clock frequency of 8 MHz. The device features four independent DMA channels and is compatible with multiple processor architectures including the 80286, 80186, 8086, Z80, and NSC800. It is housed in a 40-pin DIP package.

Specialized Feature Summary

• Supports bidirectional data transfer for high-speed peripheral interfacing
• Programmable control logic allows flexible configuration for various system requirements
• Integrated arbitration logic manages bus requests from multiple masters

Specialized Applications

• Data acquisition systems requiring direct memory access
• Industrial control units utilizing legacy microprocessor architectures
• Communication equipment managing serial or parallel data streams

Specialized Procurement Notes

Verify component authenticity through authorized distributors or certified surplus suppliers. Check datasheets for specific suffix variations that may indicate package type or temperature range differences. Confirm lead times as these are legacy components often sourced from secondary markets.

Specialized Selection Notes

Ensure compatibility with the target system's voltage levels and timing requirements. Verify that the 8 MHz maximum clock speed meets the performance needs of the connected peripherals. Consider pinout compatibility if replacing existing designs with similar controllers.

Specialized Part Context

This component belongs to the Harris CMOS logic family, designed for robust operation in industrial environments. It serves as a bridge between high-speed processors and slower I/O devices, reducing CPU overhead during data transfers.

Specialized Replacement Considerations

The CD82C37A is a documented variant within the same product line. Verify functional equivalence regarding pinouts and electrical characteristics before substitution.