SC26C562C1A,512

Specialized Overview

The SC26C562C1A is a CMOS dual universal serial communications controller (CDUSCC) providing two independent, full-duplex receiver/transmitter channels. It supports multi-protocol operation including HDLC/ADCCP, SDLC, X.25, BiSYNC, DDCMP, and asynchronous protocols. The device features sixteen-character receive and transmit FIFOs with interrupt threshold control, a watchdog timer, and data rates up to 10 Mbit/s. It interfaces to synchronous bus MPUs via a high-speed 160 ns bus cycle and supports DMA transfers. The component operates on a single +5 V supply within an ambient temperature range of 0 °C to +70 °C.

Specialized Feature Summary

• Multi-protocol support for bit-oriented, character-oriented, and asynchronous communication standards
• Integrated 16-deep FIFOs for both receiver and transmitter channels to minimize CPU overhead
• Programmable bit rate generation using fixed rates, external clocks, or digital phase-locked loop
• Hardware and register compatibility with existing SCN26562 NMOS devices

Specialized Applications

• Synchronous bus microprocessor systems requiring dual serial communication channels
• Network interface controllers supporting HDLC, SDLC, and X.25 link levels
• Industrial control systems utilizing DMA-based data transfer mechanisms
• Embedded applications requiring programmable parity, CRC generation, and error detection

Specialized Procurement Notes

Verify the specific ordering suffix C1A corresponds to the PLCC52 package variant when sourcing components. Confirm that the required operating temperature range meets the 0 °C to +70 °C specification defined in the product data sheet. Ensure that system voltage requirements align with the single +5 V power supply constraint. Cross-reference pin assignments against the provided block diagram to validate board layout compatibility.

Specialized Selection Notes

Select this component for designs requiring hardware compatibility with legacy SCN26562 systems while utilizing modern CMOS technology. Consider the PLCC52 package constraints if space is limited. Evaluate the need for dual independent channels versus single-channel alternatives. Verify that the host MPU supports the required synchronous bus interface timing specifications for optimal performance.

Specialized Part Context

This CDUSCC device serves as a CMOS successor to the NMOS SCN26562, maintaining register and pin compatibility. It is designed primarily for integration with 8086 and iAPX86 family processors. The architecture supports complex protocol handling through dedicated hardware logic, reducing software burden. It represents a specialized serial communication solution for embedded and industrial environments.

Specialized Replacement Considerations

Public confirmed substitute part numbers include SC26C562A8A and SC26C562A8N.