SC28L194A1A,512

UARTs (Universal Asynchronous Receiver Transmitter) Overview

The SC28L194A1A,512 is a quad UART integrated circuit manufactured by NXP USA Inc. (formerly Philips Semiconductors). It provides four full-duplex asynchronous communication channels on a single CMOS-LSI chip. The device operates with a single 3.3 V or 5.0 V power supply and features sixteen-byte receiver and transmitter FIFOs for each channel to minimize overrun and interrupt overhead. It supports a synchronous bus interface with a 15 ns data bus release time and 125 ns bus cycle time. Baud rates are selectable from 22 fixed rates ranging from 50 to 230.4 K baud, or up to 500 K baud using internal generators. The component is housed in a 68-pin PLCC package and functions within an industrial temperature range of -40°C to +85°C.

UARTs (Universal Asynchronous Receiver Transmitter) Feature Summary

• Four independent full-duplex UART channels with 16-byte receive and transmit FIFOs
• Synchronous host interface supporting burst mode access and vectored interrupts
• Programmable baud rate generation via fixed rates, internal counters, or external clocks
• In-band flow control using programmable Xon/Xoff characters and hardware handshaking

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

UARTs (Universal Asynchronous Receiver Transmitter) Procurement Notes

Verify the specific ordering suffix against the manufacturer's current product data sheet to confirm package type and temperature grade. Ensure that the 68-pin PLCC variant matches the target PCB footprint requirements. Confirm RoHS compliance status if required by local regulations. Cross-reference the part number with authorized distributors to validate authenticity and traceability before finalizing procurement orders.

UARTs (Universal Asynchronous Receiver Transmitter) Selection Notes

Select this component when multiple asynchronous serial interfaces are required within a space-constrained design. The quad architecture reduces board space compared to discrete single-channel UARTs. Consider the 68-pin PLCC package for through-hole assembly needs. Evaluate the interrupt arbitration system complexity against the host processor's capability to handle vectored interrupts efficiently.

UARTs (Universal Asynchronous Receiver Transmitter) Part Context

This device belongs to the SC28L series of Quad UARTs produced by NXP Semiconductors. It serves as a high-density communication solution for embedded systems requiring multiple serial ports. The SC28L194 maintains compatibility with industry-standard asynchronous protocols while offering enhanced FIFO depths and flexible clocking options compared to earlier generations.

UARTs (Universal Asynchronous Receiver Transmitter) Replacement Considerations

The SC28L194 may serve as a replacement for older Octart devices such as the SC28L198. Verify pinout compatibility and register mapping differences when substituting into existing designs. Ensure that the host software drivers support the specific interrupt arbitration and character recognition features unique to the SC28L194 architecture.