SC16C550IA44,518

UARTs (Universal Asynchronous Receiver Transmitter) Overview

The SC16C550IA44,518 is a Universal Asynchronous Receiver/Transmitter (UART) manufactured by NXP USA Inc. It operates within an industrial temperature range of -40 °C to +85 °C and supports supply voltages of 2.5 V, 3.3 V, or 5 V ± 10%. The device features 16-byte transmit and receive FIFOs with error flags, supporting data rates up to 3 Mbit/s at 5 V, 2 Mbit/s at 3.3 V, and 1 Mbit/s at 2.5 V. It includes an infrared encoder/decoder, automatic hardware/software flow control, and DMA signaling via TXRDY and RXRDY pins. The component is housed in a PLCC44 package.

UARTs (Universal Asynchronous Receiver Transmitter) Feature Summary

• Pin-compatible with industry-standard ST16C550, TL16C550, and PC16C550 devices while providing enhanced FIFO capabilities.

UARTs (Universal Asynchronous Receiver Transmitter) Applications

• Serial data communications requiring parallel-to-serial conversion.

UARTs (Universal Asynchronous Receiver Transmitter) Procurement Notes

Verify the specific ordering suffix against current manufacturer documentation to confirm package type and availability status. Confirm that the industrial temperature rating aligns with system environmental requirements. Ensure voltage levels match the target application's power supply specifications before integration.

UARTs (Universal Asynchronous Receiver Transmitter) Selection Notes

Select this component when pin compatibility with legacy 16C550 designs is required alongside improved throughput from 16-byte FIFOs. Consider the PLCC44 package constraints for PCB layout. Verify that the baud rate generator supports the necessary clock frequencies for the intended communication speed.

UARTs (Universal Asynchronous Receiver Transmitter) Part Context

This part belongs to the SC16C550 family of UARTs designed for serial asynchronous communications. It serves as an upward solution to the standard 16C450 by adding FIFO memory and advanced flow control features while maintaining register compatibility.

UARTs (Universal Asynchronous Receiver Transmitter) Replacement Considerations

SC16C550IB48

UARTs (Universal Asynchronous Receiver Transmitter) FAQ

How does the auto-flow control mechanism function?

Auto-flow control utilizes auto-CTS to prevent transmission if the input is inactive and auto-RTS to signal the sender when the receiver FIFO has space, thereby eliminating overrun errors.

What interrupt trigger levels are available for the receive FIFO?

The receive FIFO interrupt trigger level can be programmed to activate at 1, 4, 8, or 14 bytes.