ST16C450IQ48

UARTs (Universal Asynchronous Receiver Transmitter) Overview

The ST16C450IQ48 is a single-channel Universal Asynchronous Receiver/Transmitter (UART) integrated circuit manufactured by MaxLinear, formerly Sipex. It operates within a supply voltage range of 2.97V to 5.5V and supports data rates up to 187.5 kbps. The device features a 16-byte transmit FIFO and a 16-byte receive FIFO to enhance throughput efficiency. Packaged in a 48-pin Thin Quad Flat Package (TQFP) with dimensions of 9.2mm length and 1.2mm height, it is designed for surface mount installation. The component functions reliably across an industrial temperature range from -40°C to +85°C.

UARTs (Universal Asynchronous Receiver Transmitter) Feature Summary

• Integrated 16-byte transmit and receive FIFOs for improved serial communication performance
• Supports standard asynchronous protocols with NRZ encoding and decoding
• Operates on low voltage supplies starting at 2.97V

UARTs (Universal Asynchronous Receiver Transmitter) Applications

• Industrial control systems requiring reliable serial I/O
• Embedded devices needing UART interface expansion
• Data acquisition equipment operating in harsh environments

UARTs (Universal Asynchronous Receiver Transmitter) Procurement Notes

Verify the manufacturer designation carefully, as the component was originally produced by Sipex and Exar before being acquired by MaxLinear. Ensure the ordering suffix matches the required package type and temperature grade. Confirm that the specific revision aligns with your design requirements, as pinouts and electrical characteristics remain consistent across the legacy product line.

UARTs (Universal Asynchronous Receiver Transmitter) Selection Notes

Select this component when a single UART channel with moderate speed capabilities is sufficient. The 48-pin TQFP package requires adequate PCB space compared to smaller alternatives. Consider the 16-byte FIFO depth against system buffer constraints. Verify compatibility with the target microcontroller's logic levels and clock frequencies before finalizing the design.

UARTs (Universal Asynchronous Receiver Transmitter) Part Context

This part belongs to the ST16C1550/ST16C450 family of serial I/O controllers. It serves as a drop-in replacement for older 16550-compatible UARTs but offers enhanced FIFO depths. The transition from Sipex to MaxLinear has maintained the core functionality while updating manufacturing sources. It remains a standard solution for legacy serial port implementations in modern embedded hardware.

UARTs (Universal Asynchronous Receiver Transmitter) Replacement Considerations

Direct substitutes include the ST16C2550IQ48 for dual-channel applications or the ST16C1550IQ48 for similar single-channel performance. Verify pin compatibility when swapping between these variants to ensure seamless integration without schematic modifications.