CD82C85

Overview

The CD82C85 is an octal bus transceiver manufactured by Harris Corporation, belonging to the CMOS logic series. It features a single functional unit with eight bits of data width and true output polarity. The device utilizes a common control mechanism for bidirectional data flow between two ports. It incorporates gated inputs that eliminate the requirement for external pull-up resistors. The component is available in a ceramic DIP-20 package and supports three-state outputs.

Feature Summary

• Gated input architecture removes the need for external pull-up resistors
• Bidirectional data transfer capability controlled by a common signal
• Three-state output configuration for efficient bus management

Applications

• Microprocessor system bus interfacing
• Memory-to-peripheral data transfer
• Bidirectional buffer applications in digital circuits

Procurement Notes

Verify the manufacturer designation as Harris Corporation or its successor entities such as Intersil or Renesas, as corporate acquisitions have altered brand attribution over time. Confirm the specific package variant matches the required DIP-20 form factor. Ensure compatibility with standard CMOS voltage levels before integration into existing designs.

Selection Notes

Select this component when an octal bidirectional buffer with high drive capability is required for system buses. The integrated gating simplifies circuit design by removing passive components. Verify that the operating temperature range meets the environmental requirements of the target application.

Part Context

This part belongs to the Harris CMOS logic family, designed for high-performance digital systems. It serves as a critical interface element in microprocessor architectures, facilitating reliable data transmission between different system segments while maintaining signal integrity.

Replacement Considerations

The HS9-82C08RH from Renesas/Intersil is a radiation-hardened equivalent offering similar functionality. Verify pinout compatibility and electrical specifications before substitution to ensure proper system operation.