Single-Channel UART is suited for portable applications.

Press Release Summary:

With 16-Byte FIFO, TL16C550D single-channel universal asynchronous receiver/transmitter (UART) supports voltages from 5-2.5 V and data transfer rates from 1.0-1.5 Mbps. Product, housed in 32-pin QFN package, features programmable baud rate generator and auto flow control feature, which is comprised of auto-RTS and auto-CTS. Models TL16C550D and TL16C550DI accommodate up to 1.5 Mbps serial rate (24 MHz input clock), allowing for bit time of 667 ns.

Original Press Release:

TI Announces New Performance Enhanced UART with Extended Voltage Range Down to 2.5 V, Higher Data Transfer Rates Up to 1.5 Mbps

New Package Ideal for Small Form Factors, Portable Applications

DALLAS (July 14, 2004) - Expanding its offering of parallel-to-serial and serial-to-parallel universal asynchronous receiver/transmitters (UARTs), Texas Instruments Incorporated (TI) [NYSE: TXN announced today a performance enhanced, single channel UART with 16-Byte FIFO that can support voltages down to 2.5V, and data transfer rates up to 1.5 Mbps. With the new TL16C550D, designers can increase system performance in applications such as telecommunication base stations, cell phones, POS systems, modems, PDAs and more. Designers of portable equipments that require lower voltages and space saving packages now have new options in the TL16C550D and the 32 PIN QFN package. (See

The device supports data transfer rates up to 1.5 Mbps at 5V, 1.25 Mbps at 3.5V and 1.0 Mbps at 2.5V, adding even more flexibility. The TL16C550D also has a Texas Instruments patented auto flow control feature that is comprised of auto-RTS (request to send) and auto-CTS (clear to send). With this feature enabled, RTS becomes active as soon as the receiver has room for more data and notifies the sending serial device which eliminates receiver overrun.

The devices include a programmable baud rate generator capable of dividing a reference clock to produce a 16X times reference clock for the internal transmitter logic which can also be used for the receiver logic. The TL16C550D and TL16C550DI accommodate up to 1.5 Mbps serial rate (24-MHz input clock) allowing for a bit time of 667 ns (typical character time of 6.7 µs).

Key Features

o Programmable Auto-RTS and Auto-CTS (Auto Flow)

o Up to 24/20/16-MHz Clock Rates for up to 1.5/1.25/1-Mbps Operation

o Programmable Baud Rate Generator Allows Division to Generate Internal 16x Clock

o 5-V, 3.3-V, 2.5-V Operation

o Versions for Commercial and Industrial (-40C to +85C) Temperature Ranges

o Independent Receiver Clock Input

o Fully Programmable Serial Interface Characteristics

Availability, Packaging and Pricing

The TL16C550D and TL16C550DI, which are drop in replaceable for TI's popular TL16C550C and TL16C550CI UART, are available now from TI and its authorized distributors in a 48-pin TQFP (PT) package. Limited samples of a smaller 5x5 mm 32-pin QFN (RHB) package are also available now, with production release scheduled for early 3Q04. In addition, the TL16C550DPT is a distinct option for all new designs requiring the TL16C550C's functionality. Suggested pricing in 1000 piece quantities is $1.95.

Texas Instruments Incorporated provides innovative DSP and analog technologies to meet our customers' real world signal processing requirements. In addition to Semiconductor, the company's businesses include Sensors & Controls, and Educational & Productivity Solutions. TI is headquartered in Dallas, Texas, and has manufacturing, design or sales operations in more than 25 countries.

More from Thermal & Heating Equipment

All Topics