ST16C554CQ64TR-F

UARTs (Universal Asynchronous Receiver Transmitter) Overview

The ST16C554CQ64TR-F is a quad Universal Asynchronous Receiver and Transmitter (UART) integrated circuit manufactured by MaxLinear. It features four independent UART channels, each equipped with 16-byte transmit and receive FIFOs. The device supports data rates up to 1.5 Mbps at 5V and 500 Kbps at 3.3V. Operating voltage ranges from 2.97V to 5.5V. It offers selectable Intel or Motorola bus interfaces via the 16/68# pin. The component is housed in a 64-pin LQFP package and operates within a commercial temperature range of 0°C to +70°C.

UARTs (Universal Asynchronous Receiver Transmitter) Feature Summary

• Four independent UART channels with 16-byte transmit and receive FIFOs
• Selectable Intel or Motorola data bus interface modes
• Internal loopback capability for onboard diagnostics
• Programmable baud rate generator supporting crystal oscillator or external clock input

UARTs (Universal Asynchronous Receiver Transmitter) Applications

• Telecommunication network routers
• Ethernet network routers
• Cellular data devices
• Factory automation and process controls

UARTs (Universal Asynchronous Receiver Transmitter) Procurement Notes

Verify the specific ordering suffix against official manufacturer documentation to confirm package type, temperature range, and interrupt output behavior. Confirm that the TR suffix indicates tape and reel packaging if required by assembly processes. Ensure compatibility with the host system's voltage levels and bus interface requirements before procurement.

UARTs (Universal Asynchronous Receiver Transmitter) Selection Notes

Select this component when a quad UART solution with moderate FIFO depth is required for embedded systems. The ST16C554CQ64 variant provides three-state interrupt outputs controlled by software, differing from the continuous interrupt mode of the DC suffix. Verify that the 0°C to +70°C operating range meets the environmental specifications of the target application.

UARTs (Universal Asynchronous Receiver Transmitter) Part Context

This part belongs to the ST16C554D series, which integrates the functions of four enhanced 16C550 UARTs on a single chip. The series combines the package interface modes of the 16C554 and 68C554. The CQ64 designation specifically refers to the 64-lead LQFP package with a commercial temperature rating and standard interrupt configuration.

UARTs (Universal Asynchronous Receiver Transmitter) Replacement Considerations

The ST16C554DCQ64 is a pin-compatible alternative offering continuous interrupt output instead of three-state control. Other compatible parts include the ST16C454, ST68C454, and ST68C554.