SC28L194A1BE,551

UARTs (Universal Asynchronous Receiver Transmitter) Overview

The SC28L194A1BE,551 is a Quad Universal Asynchronous Receiver/Transmitter (QUART) designed for 3.3 V and 5.0 V supply voltages. It integrates four independent full-duplex UART channels, each equipped with 16-byte receive and transmit FIFOs to minimize overrun and interrupt overhead. The device features a synchronous host interface supporting burst mode access and programmable interrupt priorities. Baud rate generation utilizes a fixed generator for standard rates or two programmable counters for custom speeds, accommodating external clocks. It includes in-band flow control via Xon/Xoff characters, automatic address recognition, and a power-down mode that halts the oscillator while preserving register contents.

UARTs (Universal Asynchronous Receiver Transmitter) Feature Summary

• Four independent full-duplex UART channels with 16-byte FIFOs
• Synchronous host interface with programmable interrupt arbitration
• Flexible baud rate selection using fixed generators or programmable counters
• In-band flow control and automatic address detection capabilities

UARTs (Universal Asynchronous Receiver Transmitter) Applications

• Statistical multiplexers and data concentrators
• Process control and building automation systems
• Terminal servers and computer-peripheral links
• Automotive cab and engine controls
• ISDN front ends and packet-switching networks

UARTs (Universal Asynchronous Receiver Transmitter) Procurement Notes

Verify the specific ordering suffix against the manufacturer's current product status documentation. Confirm that the industrial temperature range and package type match the design requirements. Ensure compatibility with the intended supply voltage levels before integration into the final system architecture.

UARTs (Universal Asynchronous Receiver Transmitter) Selection Notes

Select this component when multiple asynchronous serial interfaces are required within a single footprint. The integrated FIFOs reduce processor load compared to devices without buffering. Verify that the host system clock frequency meets the minimum requirement relative to the baud rate generator inputs for proper timing operation.

UARTs (Universal Asynchronous Receiver Transmitter) Part Context

This part belongs to the Philips/NXP SC28L194 family of quad UARTs. It serves as a high-density communication controller replacing older discrete solutions. The LQFP-80 package provides the necessary pin count for four channels plus global I/O and control signals, fitting into space-constrained industrial and automotive designs.

UARTs (Universal Asynchronous Receiver Transmitter) Replacement Considerations

SC28L194A1A is the PLCC-68 equivalent offering identical functionality in a different package format.