SCC2691AC1N24,129

UARTs (Universal Asynchronous Receiver Transmitter) Overview

The SCC2691AC1N24,129 is a single-chip CMOS Universal Asynchronous Receiver/Transmitter (UART) fabricated by NXP Semiconductors. It provides full-duplex asynchronous communication with an 8-bit bidirectional data bus and TTL-compatible logic levels. The device operates from a single +5V power supply and supports independent baud rate selection for the receiver and transmitter via fixed rates, a programmable counter/timer, or external clocks. Key specifications include a 3.6864 MHz crystal oscillator input, a quadruple-buffered receiver FIFO, and seven maskable interrupt conditions. 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 independent baud rate control
• Quadruple buffered receiver data register to minimize overrun potential
• Programmable data format supporting 5 to 8 data bits plus parity and variable stop bits
• On-chip crystal oscillator and 16-bit programmable 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 against current manufacturer documentation to confirm package type and temperature rating. Confirm that the commercial grade variant meets the required ambient operating conditions for the target application environment. Ensure compatibility with existing system voltage supplies and interface timing requirements before finalizing procurement.

UARTs (Universal Asynchronous Receiver Transmitter) Selection Notes

Select this component when a standalone UART with independent receiver and transmitter clocking is required. Verify that the 24-pin DIP package fits the available PCB footprint constraints. Ensure the system design accommodates the necessary external crystal components for the internal oscillator. Confirm that the single +5V supply requirement aligns with the overall system power architecture.

UARTs (Universal Asynchronous Receiver Transmitter) Part Context

This part belongs to the SCC2691 family of universal asynchronous receiver/transmitters. It is functionally compatible with industry-standard 16C UART pinouts and software drivers. The device represents a CMOS implementation designed to offer high density and low power consumption compared to older bipolar technologies while maintaining full backward compatibility with legacy serial communication standards.

UARTs (Universal Asynchronous Receiver Transmitter) Replacement Considerations

SCC2691AE1N24 serves as the industrial temperature version (-40°C to +85°C) of this component. Both parts share identical electrical characteristics and pin configurations but differ in their specified operating temperature ranges. Select the AE variant if the application environment exceeds the commercial temperature limits.