TL16C550CFN

UARTs (Universal Asynchronous Receiver Transmitter) Overview

The TL16C550CFN is a single-channel asynchronous communications element (ACE) manufactured by Texas Instruments, housed in a 44-pin PLCC package. It supports 3-V to 5.25-V supply voltages and operates within a temperature range of -40°C to +85°C. The device features 16-byte transmit and receive FIFOs with error status bits, supporting baud rates up to 1 Mbaud with a maximum clock rate of 16 MHz. It includes programmable auto-RTS and auto-CTS autoflow control, independent interrupt generation, and full modem control capabilities.

UARTs (Universal Asynchronous Receiver Transmitter) Feature Summary

• Programmable autoflow control using auto-RTS and auto-CTS modes to manage serial data flow and reduce CPU overhead.
• Integrated 16-byte transmit and receive FIFOs that buffer characters and include three additional error status bits per byte for the receiver.
• Complete modem control interface supporting CTS, RTS, DSR, DTR, RI, and DCD signals with dedicated status reporting.
• Fully prioritized interrupt system allowing independent control of transmit, receive, line status, and data set interrupts.

UARTs (Universal Asynchronous Receiver Transmitter) Applications

• Multiprotocol UART designs utilizing DSP controllers such as TMS320VC33.
• Systems requiring direct RJ11 cable connection when equipment shares the same power drop.
• Applications needing DMA signaling via TXRDY and RXRDY outputs for efficient data transfer.

UARTs (Universal Asynchronous Receiver Transmitter) Procurement Notes

Verify component authenticity through authorized distributors or official Texas Instruments channels. Confirm the specific FN package variant matches design requirements. Check for end-of-life status or alternative sourcing options if production continuity is critical. Ensure environmental compliance documentation aligns with project specifications.

UARTs (Universal Asynchronous Receiver Transmitter) Selection Notes

Select this model for applications requiring a single UART channel with integrated autoflow control. The PLCC-44 package is suitable for surface-mount assembly where space constraints allow. Consider the operating voltage range and thermal resistance metrics when designing the PCB layout. Verify compatibility with existing TL16C450 software if migrating from legacy components.

UARTs (Universal Asynchronous Receiver Transmitter) Part Context

The TL16C550CFN belongs to the TL16C550C family, which serves as a functional upgrade to the TL16C550B and TL16C450. It maintains register compatibility with the TL16C450 upon reset while adding advanced FIFO and autoflow features. This lineage ensures backward compatibility for software designed for older asynchronous communication elements.

UARTs (Universal Asynchronous Receiver Transmitter) Replacement Considerations

The TL16C550DIPTG4 is a documented alternative offering similar functionality in a 48-pin LQFP package. Verify pinout differences and package dimensions before substitution. Ensure the replacement part meets the required operating temperature and voltage specifications for the target application.