TL16C550BFN

UARTs (Universal Asynchronous Receiver Transmitter) Overview

The TL16C550BFN is a single-channel asynchronous communications element (ACE) manufactured by Texas Instruments. It features 16-byte transmit and receive FIFOs to reduce CPU interrupt overhead. The device supports data rates up to 562 Kbit/s with a programmable baud rate generator capable of dividing an input clock by 1 to (2^16 – 1). It operates on a 5 V supply voltage, ranging from 4.75 V to 5.25 V. The component is housed in a 44-pin PLCC package and is rated for an operating temperature range of 0 °C to 70 °C.

UARTs (Universal Asynchronous Receiver Transmitter) Feature Summary

• Provides 16-byte FIFO buffers for both transmitter and receiver to minimize system software overhead.
• Includes a programmable baud rate generator that divides the reference clock to generate internal timing signals.
• Supports standard asynchronous communication formats including configurable character lengths, parity, and stop bits.
• Features independent modem control functions and a fully prioritized interrupt system.

UARTs (Universal Asynchronous Receiver Transmitter) Applications

• Serial-to-parallel and parallel-to-serial data conversion for peripheral devices.
• Replacement for National Semiconductor NS16550A in existing hardware designs.
• Systems requiring reduced CPU intervention during serial data transfers.

UARTs (Universal Asynchronous Receiver Transmitter) Procurement Notes

Verify the specific suffix 'FN' corresponds to the 44-pin PLCC package and commercial temperature grade when sourcing. Confirm availability status as older generation components may have limited production runs or require obsolescence management strategies.

UARTs (Universal Asynchronous Receiver Transmitter) Selection Notes

Select this model for applications requiring direct compatibility with TL16C450 register sets while utilizing FIFO capabilities. Ensure the design accommodates the 44-pin PLCC footprint and 5 V logic levels. Verify that the required baud rates fall within the supported DC to 562 Kbit/s range.

UARTs (Universal Asynchronous Receiver Transmitter) Part Context

The TL16C550B series serves as a functional upgrade to the TL16C450 ACE. It maintains register compatibility for backward compatibility while introducing FIFO modes for enhanced performance. The 'B' designation indicates the commercial temperature variant, distinct from the industrial 'BI' version.

UARTs (Universal Asynchronous Receiver Transmitter) Replacement Considerations

The datasheet identifies the TL16C550B as a faster plug-in replacement for the National Semiconductor NS16550A. No other specific substitute part numbers are documented in the provided source material.