SCC2691AE1N24,129

UARTs (Universal Asynchronous Receiver Transmitter) Overview

The SCC2691AE1N24,129 is a single-chip CMOS Universal Asynchronous Receiver/Transmitter (UART) manufactured by NXP Semiconductors. It provides full-duplex asynchronous communication with an operating speed selectable from 22 fixed baud rates ranging from 50 to 115.2K baud, non-standard rates up to 115.2 kb, or external clocks. The device features a quadruple buffered receiver data register and a programmable 16-bit counter/timer. It operates on a single +5V power supply and is fully TTL compatible. The component is housed in a 24-pin Plastic Dual In-Line Package (DIP) and supports commercial temperature ranges of 0°C to +70°C.

UARTs (Universal Asynchronous Receiver Transmitter) Feature Summary

• Full-duplex asynchronous receiver/transmitter with independent baud rate selection for receiver and transmitter channels
• Quadruple buffered receiver data register to minimize overrun potential and reduce interrupt overhead
• Programmable data format supporting 5 to 8 data bits plus parity and 1, 1.5, or 2 stop bits
• On-chip crystal oscillator and multi-function programmable 16-bit counter/timer

UARTs (Universal Asynchronous Receiver Transmitter) Applications

• Clustered terminal systems requiring dual-speed channel applications
• Microprocessor-based serial communication interfaces
• Industrial control systems utilizing standard UART protocols

UARTs (Universal Asynchronous Receiver Transmitter) Procurement Notes

Verify the specific ordering suffix '129' against official manufacturer documentation to confirm tape-and-reel packaging specifications. Ensure the component matches the commercial temperature range requirements for your application environment. Cross-reference the package type with the datasheet pinout diagrams to validate physical compatibility during integration.

UARTs (Universal Asynchronous Receiver Transmitter) Selection Notes

Select this component when a single +5V supply and TTL compatibility are required for serial communication. Consider the quadruple buffering feature if minimizing CPU interrupt overhead is critical. Verify that the available clock sources meet the frequency requirements for the desired baud rates. Evaluate the DIP package constraints against available PCB space.

UARTs (Universal Asynchronous Receiver Transmitter) Part Context

This part belongs to the SCC2691 family of universal asynchronous receiver/transmitters produced by Philips/NXP Semiconductors. It serves as a CMOS-LSI communications device designed for high density and low power consumption. The series includes variants with different packages and temperature ratings, such as PLCC and SOL options.

UARTs (Universal Asynchronous Receiver Transmitter) Replacement Considerations

SCC2691AC1N24 is the commercial version of this component in the same 24-pin DIP package. For industrial temperature range (-40°C to +85°C), consider the SCC2691AE1N24 variant without the reel suffix.