SCC2691AE1N24,602

UARTs (Universal Asynchronous Receiver Transmitter) Overview

The SCC2691AE1N24,602 is a single-chip CMOS-LSI Universal Asynchronous Receiver/Transmitter (UART) manufactured by NXP Semiconductors. It provides full-duplex asynchronous communication with an 8-bit bidirectional data bus and operates from a single +5V power supply. The device features a quadruple buffered receiver to minimize overrun errors and supports independent baud rate selection for the receiver and transmitter via fixed rates, programmable counters, or external clocks. It includes a 16-bit programmable counter/timer, parity/framing detection, and multiple channel modes. The component is housed in a 24-pin Plastic Dual In-Line Package (DIP) and is rated for commercial operation within a temperature range of 0°C to +70°C.

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, configurable parity, and 1, 1.5, or 2 stop bits
• Independent baud rate selection for receiver and transmitter using fixed rates, internal timers, or external clocks
• Single interrupt output with seven maskable interrupting conditions 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 TTL-compatible logic levels

UARTs (Universal Asynchronous Receiver Transmitter) Procurement Notes

Verify that the specific ordering suffix matches the required package type and operating temperature range. Confirm the manufacturer designation aligns with current NXP Semiconductors product lines, as historical Philips branding may appear on legacy documentation. Ensure compatibility with system voltage requirements and interface standards before integration.

UARTs (Universal Asynchronous Receiver Transmitter) Selection Notes

Select this UART when independent baud rate generation for separate receive and transmit channels is necessary. Consider the quadruple buffering feature for interrupt-driven systems to reduce overhead. Verify that the 24-pin DIP package fits the target PCB layout constraints and that the +5V supply requirement matches the system power architecture.

UARTs (Universal Asynchronous Receiver Transmitter) Part Context

This component belongs to the SCC2691 family of universal asynchronous receiver/transmitters. It serves as a direct replacement for earlier generations of UARTs designed for high-density, low-power applications. The device supersedes previous data sheets dated September 1998, incorporating updated specifications for timing and electrical characteristics while maintaining functional compatibility with standard microprocessor interfaces.

UARTs (Universal Asynchronous Receiver Transmitter) Replacement Considerations

SCC2691AC1N24 is the commercial temperature version of this component. For industrial temperature ranges (-40°C to +85°C), the SCC2691AE1N24 variant is available. Cross-reference with other members of the SCC269x family if different pin counts or package types are required.