SC28C94A1N,112

UARTs (Universal Asynchronous Receiver Transmitter) Overview

The SC28C94A1N,112 is a Quad Universal Asynchronous Receiver/Transmitter (QUART) integrated circuit manufactured by NXP USA Inc. It integrates four independent UARTs within a single 52-pin PLCC package. The device operates on a single +5V power supply and supports industrial temperature ranges from -40°C to +85°C. Each channel features an 8-byte receive FIFO and an 8-byte transmit FIFO to minimize host processor overhead. Baud rates are selectable from 18 fixed rates up to 230.4K baud, or user-defined rates via programmable counter/timers. The component utilizes high-speed CMOS technology for low power consumption and includes a built-in crystal oscillator.

UARTs (Universal Asynchronous Receiver Transmitter) Feature Summary

• Integrates four industry-standard UARTs with independent interrupt control to reduce host processor overhead
• Provides eight-byte receive and transmit FIFOs per channel to prevent data overrun and manage flow control
• Supports flexible baud rate generation through fixed rates, programmable counter/timers, or external clocks
• Includes comprehensive error detection capabilities such as parity, framing, overrun, and false start bit detection

UARTs (Universal Asynchronous Receiver Transmitter) Applications

• Clustered terminal systems requiring dual-speed channel applications
• Industrial embedded systems needing multiple asynchronous serial interfaces
• Host processors requiring reduced interrupt overhead in multi-channel communication environments

UARTs (Universal Asynchronous Receiver Transmitter) Procurement Notes

Verify the specific ordering suffix against current NXP documentation to confirm package type and environmental compliance. Confirm that the component status aligns with project lifecycle requirements, as availability may vary based on manufacturing discontinuation schedules. Ensure compatibility with existing system voltage levels and interface protocols before procurement.

UARTs (Universal Asynchronous Receiver Transmitter) Selection Notes

Select this QUART when multiple independent serial channels are required within a single footprint. Consider the 8-byte FIFO depth for buffering requirements and the flexibility of baud rate sources including internal oscillators or external clocks. Evaluate the interrupt arbitration features if minimizing CPU intervention is a primary design constraint.

UARTs (Universal Asynchronous Receiver Transmitter) Part Context

This component belongs to the SC28C94 family of quad universal asynchronous receiver/transmitters. It represents an evolution of standard UART designs by integrating advanced interrupt handling and FIFO buffers directly into the silicon. The device is designed to replace discrete UART solutions, offering a compact implementation for complex serial communication architectures.

UARTs (Universal Asynchronous Receiver Transmitter) Replacement Considerations

Direct pin-to-pin replacements should be verified against official NXP substitution lists. Note that the SC28C94A1A variant shares the same core functionality but may differ in environmental certifications or lead-free status. Ensure any substitute maintains the 52-pin PLCC package and +5V operating voltage.