XR68C681CP

Overview

The XR68C681CP is a dual Universal Asynchronous Receiver and Transmitter (UART) integrated circuit manufactured by MaxLinear, Inc. It operates on a single 5V supply voltage and supports data rates up to 1 Mbps. The device is housed in a 40-pin Plastic Dual In-line Package (PDIP) with dimensions of 0.600 inches (15.24 mm). Key internal features include an integrated oscillator and built-in timer/counter capabilities. The component is classified as a serial I/O controller designed for CMOS technology.

Feature Summary

• Dual channel UART architecture supporting independent asynchronous communication
• Integrated clock generation via internal oscillator eliminating external crystal requirements
• Built-in programmable timer/counter for baud rate generation and system timing

Applications

• Industrial control systems requiring reliable serial data transmission
• Embedded computer interfaces for legacy protocol compatibility
• Telecommunications equipment utilizing standard UART signaling

Procurement Notes

Verify component authenticity through authorized channels due to discontinued status. Confirm package integrity upon receipt, as PDIP units may be subject to lead inspection. Cross-reference the manufacturer part number XR68C681CP with official MaxLinear documentation to ensure compliance with RoHS3 specifications and historical assembly site records prior to integration into production designs.

Selection Notes

Select this component when a through-hole mounting solution is required for dual UART functionality. Ensure the design accommodates the 40-PDIP footprint and 5V logic levels. Consider surface-mount alternatives like the XR68C681CJTR-F if board space constraints or automated assembly processes necessitate PLCC packaging instead of the larger DIP form factor.

Part Context

This part belongs to the XR68C681 family of serial I/O controllers produced by MaxLinear, formerly Exar Corporation. The CP suffix specifically denotes the 40-pin PDIP variant, distinguishing it from surface-mount options such as the CQCC44 or PLCC packages within the same functional series. The device maintains compatibility with standard MC68681 pinouts for ease of migration in existing hardware architectures.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Designers should consult MaxLinear engineering support for qualified replacements or evaluate generic 68681-compatible devices that match the 40-PDIP package and electrical specifications.