IP82C37A

Specialized Overview

The IP82C37A is a CMOS high-performance programmable DMA controller fabricated using Harris Corporation's advanced 2-micron CMOS process. It serves as an enhanced version of the industry-standard 8237A, offering pin compatibility with NMOS designs while providing increased functionality and significantly reduced power consumption. The device features four independent maskable channels with autoinitialization capability and supports cascading to any number of channels for expanded system requirements.

Specialized Feature Summary

• Four independent maskable channels with autoinitialization capability
• Fully static CMOS design permitting low power operation and gated clock operation
• Supports memory-to-memory transfers and high-speed data transfer rates
• Fully TTL/CMOS compatible with internal registers readable from software

Specialized Applications

• High-performance direct memory access control in microprocessor systems
• Data transfer operations between memory and I/O devices
• Memory-to-memory data movement applications

Specialized Procurement Notes

Verify the specific suffix 'IP' against official Harris or Intersil documentation to confirm temperature range and package type. Ensure the component matches the required 2-micron CMOS specification and 40-pin DIP form factor. Cross-reference datasheets for electrical characteristics such as maximum clock frequency and current consumption limits before integration.

Specialized Selection Notes

Select this component when replacing legacy NMOS 8237A controllers to achieve lower power consumption without redesigning the PCB layout due to pin compatibility. Consider the 2-micron CMOS process benefits for improved performance and static design advantages. Verify that the system requires four independent maskable channels and supports the necessary clock frequencies for the intended data transfer rates.

Specialized Part Context

The IP82C37A belongs to the 82C37A family of CMOS DMA controllers produced by Harris Corporation. This family includes variants like CD82C37A and CP82C37AB6005, all sharing the core architecture of an enhanced 8237A implementation. These components are designed to provide high-performance DMA capabilities in embedded systems and microprocessor-based applications requiring efficient data handling.

Specialized Replacement Considerations

The IP82C37A is pin-compatible with the NMOS 8237A. Verified substitutes include the 5962-9054303MXA from Harris/Intersil, which shares the same functional description and CMOS fabrication process. Ensure replacement parts maintain the 4-channel configuration and TTL/CMOS compatibility.