ST16C1450CQ48

UARTs (Universal Asynchronous Receiver Transmitter) Overview

The ST16C1450CQ48 is a single-channel Universal Asynchronous Receiver/Transmitter (UART) manufactured by Exar. It operates on a single power supply ranging from 2.97V to 5.5V and supports data rates up to 1.5 Mbps with a 24 MHz crystal or 4 Mbps with an external clock. The device integrates 16-byte transmit and receive FIFOs to reduce CPU bandwidth requirements. It features programmable baud rate generators, interrupt capabilities, and modem control signals. The component is housed in a 48-pin Thin Quad Flat Package (TQFP) and is designed for industrial temperature ranges.

UARTs (Universal Asynchronous Receiver Transmitter) Feature Summary

• Integrated 16-byte transmit and receive FIFOs to minimize external CPU intervention
• Programmable baud rate generators supporting crystal or external clock inputs
• Full hardware modem control interface including RTS, CTS, DTR, DSR, RI, and CD signals
• Interrupt generation based on receive data availability, transmit holding register emptiness, and status changes

UARTs (Universal Asynchronous Receiver Transmitter) Applications

• Portable appliances requiring low-power serial communication
• Telecommunication network routers and switches
• Factory automation and process control systems
• Embedded controllers managing multiple serial peripherals

UARTs (Universal Asynchronous Receiver Transmitter) Procurement Notes

Verify the specific suffix 'CQ48' confirms the 48-pin TQFP package and commercial/industrial temperature grade. Confirm RoHS compliance status as historical Exar documentation may vary. Ensure the supplier provides the original manufacturer datasheet to validate electrical characteristics against current MaxLinear specifications following corporate acquisitions.

UARTs (Universal Asynchronous Receiver Transmitter) Selection Notes

Select this component when a single UART channel with moderate FIFO depth is required. Compare against the ST16C2550 if dual channels are needed. Verify voltage compatibility with the host system logic levels. Consider the ST16C450 if only one channel is needed but a different package form factor is preferred. Check pinout compatibility with legacy designs using PC16550D derivatives.

UARTs (Universal Asynchronous Receiver Transmitter) Part Context

This part belongs to the ST16C1550 family of enhanced UARTs. It shares architectural similarities with the ST16C2550 but offers a single channel instead of two. It serves as a drop-in replacement for older 16C550 devices while providing superior performance through integrated FIFOs and higher maximum data rates. The device bridges legacy serial interfaces with modern embedded processing requirements.

UARTs (Universal Asynchronous Receiver Transmitter) Replacement Considerations

Pin-compatible alternatives include the ST16C2550 for dual-channel needs. The XR16L2550 is another single-channel option within the Exar portfolio. Verify that any substitute maintains the same 48-pin TQFP footprint and voltage operating range.