SCC2691AC1A28,602

UARTs (Universal Asynchronous Receiver Transmitter) Overview

The NXP USA Inc. SCC2691AC1A28,602 is a single-chip CMOS-LSI Universal Asynchronous Receiver/Transmitter (UART) fabricated with Philips Semiconductors technology. It provides full-duplex asynchronous communication and operates from a single +5V power supply. The device features a quadruple buffered receiver data register to minimize overrun potential and reduce interrupt overhead. It supports independent selection of operating speeds for the receiver and transmitter via 18 fixed baud rates, a programmable counter/timer, or external clocks. The UART includes a power-down mode that freezes the oscillator while storing register contents to significantly reduce power consumption.

UARTs (Universal Asynchronous Receiver Transmitter) Feature Summary

• Full-duplex asynchronous receiver/transmitter with quadruple buffered receiver data register
• Programmable data format supporting 5 to 8 data bits plus parity and 1, 1.5, or 2 stop bits
• On-chip crystal oscillator and 16-bit programmable Counter/Timer
• Multi-function programmable output pin selectable for various control signals

UARTs (Universal Asynchronous Receiver Transmitter) Applications

• Clustered terminal systems requiring dual-speed channel applications
• Interrupt-driven systems needing minimized receiver overrun and reduced interrupt overhead
• Multi-processor communications utilizing automatic wake-up through address frame recognition

UARTs (Universal Asynchronous Receiver Transmitter) Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm package type and temperature range. Ensure compatibility with the required voltage supply and interface standards before procurement. Cross-reference the part number with official distributor catalogs to validate availability and authenticity.

UARTs (Universal Asynchronous Receiver Transmitter) Selection Notes

Select this component when independent baud rate generation for receiver and transmitter channels is required. Consider the quadruple buffering feature for high-throughput interrupt-driven environments. Verify that the available packages match the board layout constraints and that the operating temperature range meets the application requirements.

UARTs (Universal Asynchronous Receiver Transmitter) Part Context

This UART belongs to the family of universal asynchronous receiver/transmitters designed for serial communications. It is compatible with standard TTL logic levels and offers flexibility in clocking options. The device integrates timing circuits, including a baud rate generator and counter/timer, on a single chip to simplify system design.

UARTs (Universal Asynchronous Receiver Transmitter) Replacement Considerations

SCC2691AE1A28 is an industrial temperature version (-40°C to +85°C) of the same device.