ST16C1450CJ28TR-F

UARTs (Universal Asynchronous Receiver Transmitter) Overview

The ST16C1450CJ28TR-F is a universal asynchronous receiver and transmitter (UART) fabricated in an advanced CMOS process. It operates within a voltage range of 2.97V to 5.5V and supports data rates up to 1.5 Mbps with a 24 MHz crystal or external clock input. The device features a single channel with one-byte Transmit Holding Register (THR) and one-byte Receive Holding Register (RHR) equipped with error tags. It includes four prioritized interrupt levels, programmable baud rate generators, and internal loopback capabilities for diagnostics. The component is housed in a 28-pin PLCC package and functions as a footprint-compatible replacement for legacy SSI UARTs.

UARTs (Universal Asynchronous Receiver Transmitter) Feature Summary

• Pin and functionally compatible with SSI 73M1550 and 73M2550 UARTs
• Integrated modem control interface supporting standard signals such as CTS#, RTS#, DSR#, DTR#, RI#, and CD#
• Supports software-controllable reset output and low-power down mode for energy conservation
• Provides internal loopback capability for system diagnostic verification

UARTs (Universal Asynchronous Receiver Transmitter) Applications

• Battery operated electronics requiring low power consumption
• Internet appliances and handheld terminals
• Personal digital assistants and cellular phone data ports

UARTs (Universal Asynchronous Receiver Transmitter) Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm package type and temperature range. Ensure compatibility with host processor address lines A0-A2 and data bus configurations. Confirm that the application does not rely on MS Windows standard serial port drivers, as this component is explicitly noted as incompatible with them.

UARTs (Universal Asynchronous Receiver Transmitter) Selection Notes

Select this component when a direct pin-compatible upgrade from SSI 73M1550/2550 is required without changing the PCB layout. It is suitable for designs needing enhanced modem control signals and prioritized interrupts compared to basic 16450 equivalents. Consider the 48-pin TQFP variant if additional pins or buffered reset outputs are necessary for the system architecture.

UARTs (Universal Asynchronous Receiver Transmitter) Part Context

This part belongs to the ST16C1450 series of UARTs manufactured by Exar Corporation, now part of MaxLinear. The series provides enhanced functionality over standard industry UARTs, including FIFO-like buffering via holding registers and dedicated modem control lines. The CJ28 designation specifically identifies the commercial temperature range version in the 28-lead PLCC package.

UARTs (Universal Asynchronous Receiver Transmitter) Replacement Considerations

The datasheet confirms pin and functional compatibility with SSI 73M1550 and SSI 73M2550. It is not compatible with the industry standard 16450. For Microsoft Windows compatibility, the ST16C450 is recommended instead.