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What is a UART?

A UART, or Universal Asynchronous Receiver / Transmitter, is a piece of computer hardware that translates data between parallel and serial forms. It is an integrated circuit used for serial communications that contains a receiver (serial-to-parallel converter) and a transmitter (parallel-to-serial converter), each clocked separately. The parallel side of a UART is often connected to the bus of a computer. When the computer writes a byte to the transmit data register of a UART, the UART will start to transmit it on the serial line. UARTs are often used with communication standards such as EIA, RS-422, RS-232 or RS-485. The universal designation indicates that the transmission speeds and data format are configurable and that the electric signalling levels and methods are typically handled by a special driver circuit that is external to the UART.

UARTs are often included in microcontrollers. A dual UART (DUART) combines two UARTs into a single chip. Several modern integrated circuits now come with a UART that can also communicate synchronously. Such a device is called a USART (universal synchronous / asynchronous receiver / transmitter).

Types of UARTs

There are several different kinds of UARTs at Future Electronics. We stock many of the most common types categorized by several parameters including data rate, number of functions, interface circuit type, packaging type and supply voltage. Our parametric filters will allow you to refine your search results according to the required specifications.

The most common sizes for data Rate are 230.4 kbps, 1 Mbps, 1.5 Mbps, 5 Mbps, 6.25 Mbps and 16 Mbps. We also carry UARTs with data rates up to 25 Mbps. The most common interface circuit types are parallel and serial.

UARTs From Future Electronics

Future Electronics has a wide range of UART and USART devices, including single UARTs, DUARTs, quad UARTs and octal UARTs from several manufacturers. Simply choose from the UART technical attributes below and your search results will quickly be narrowed to match your specific universal asynchronous receiver and transmitter needs.

We deal with several manufacturers such as EXAR, Freescale Semiconductor, Microchip, NXP and Silicon Labs. You can easily refine your UART product search results by clicking your preferred UART brand from the list of manufacturers below.

Applications for UARTs:

Universal Asynchronous Receiver / Transmitters are commonly included in microcontrollers and are designed to be used for several applications. UARTs are used for devices including GPS units, modems, wireless communication and Bluetooth modules, amongst many other applications.

Choosing the Right UART:

When you are looking for the right UART, with the FutureElectronics.com parametric search, you can filter the results by various attributes: by Data Rate (230.4 kbps, 1 Mbps, 1.5 Mbps, 5 Mbps, 6.25 Mbps, 16 Mbps,…), interface circuit type (serial, parallel,…), number of functions (from 1 to 8 functions), and supply voltage (up to 5.5V) to name a few. You will be able to find the right UART and USART for your programming needs using these filters.

UARTs in Production Ready Packaging or R&D Quantities

If the quantity of UARTs required is less than a full reel, we offer to our customers many of our universal asynchronous receiver and transmitter products in tube, tray or individual quantities that will avoid unneeded surplus.

In addition, Future Electronics offers clients a unique bonded inventory program designed to eliminate potential problems that could arise from an unpredictable supply of products containing raw metals and products with erratic or long lead times. Talk with your nearest Future Electronics branch and find out more on how you and your company can avoid possible shortages.



Featured UART Microcontroller Products


Manufacturer Part Number Description
Exar ST16C2550IQ48-F ST16C2550 Series 1.5 Mbps 5.5 V Dual UART With 16-Byte Transmit - TQFP-48
Exar ST16C550CQ48-F ST16C550 Series 1.5 Mbps 5.5 V Single UART With 16-Byte FIFO - TQFP-48
Exar XR16C2850CM-F XR16C2850 Series 6.25 Mbps 5.5 V Dual UART With 128-Byte FIFOS - TQFP-48
Exar ST16C554DIQ64-F ST68C554 Series 1.5 Mbps 5.5 V Quad UART With 16-Byte FIFO - TQFP-64
Exar XR88C192CV-F XR68C92 Series 5.5V 230.4kbps Dual Universal Asynchronous Receiver & Transmitter
Exar ST16C550CJ44TR-F ST16C550 Series 1.5 Mbps 5.5 V Single UART With 16-Byte FIFO - PLCC-44
Exarr XR17D152CM-F XR17D152 Series 6.25 Mbps 3.3 V and 5 V Universal PCI BUS Dual UART - TQFP-144
Exar ST16C554DCJ68-F ST68C554 Series 1.5 Mbps 5.5 V Quad UART With 16-Byte FIFO - PLCC-64
Exar XR16L2752IJ-F XR16L2752 Series 6.25 Mbps 5.5 V Dual UART With 64-Byte FIFO - PLCC-44
Exar ST16C554DCJ68TR-F ST68C554 Series 1.5 Mbps 5.5 V Quad UART With 16-Byte FIFO - PLCC-64
Exar ST16C2550CQ48-F ST16C2550 Series 1.5 Mbps 5.5 V Dual UART With 16-Byte Transmit - TQFP-48
Exar ST16C554DCQ64-F ST68C554 Series 1.5 Mbps 5.5 V Quad UART With 16-Byte FIFO - TQFP-64
Exar ST16C450CP40-F ST16C450 Series 1.5 Mbps 5.5 V Universal Asynchronous UART - PDIP-40
Exar ST16C654CJ68-F ST16C654 Series 1.5 Mbps 5.5 V SMT Quad UART With 64-Byte FIFO - PLCC-68
Exar ST16C654IQ64-F ST16C654 Series 1.5 Mbps 5.5 V SMT Quad UART With 64-Byte FIFO - PLCC-68
Exar ST16C552CJ68-F ST16C552 Series 1.5 Mbps 5.5 V Dual UART With 16-Byte FIFO - PLCC-68
NXP SC16C752BIB48,157 SC16C752B Series Dual Universal Asynchronous Receiver / Transmitter - SOT313-2
NXP SC28L92A1B,557 SC28L92 Series Dual Universal AsynchronousReceiver / Transmitter - SOT307-2
NXP SC16C650BIB48,128 SC16C650B Series UART Used for Serial Data Communications - SOT313-2
NXP SCC2692AC1N28,602 SCC2692 Series Dual Asynchronous Receiver / Transmitter - SOT117-1
NXP SC16C2550BIB48,151 SC16C2550B Series 2 Ch UART 5 Mbit 16 Byte FIFO - LQFP-48
NXP SC16IS760IBS,128 SC16IS760 Series I2C/ SPI Interface 5 Mbps Single Channel UART - HVQFN-24
NXP SC16IS740IPW,112 SC16IS740 Series I2C Bus / SPI Interface 5 Mbps Single Channel UART - TSSOP-16
NXP SC16IS760IBS,151 SC16IS760 Series I2C Bus / SPI Interface 5 Mbps Single Channel UART - HVQFN-24

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