Universal Asynchronous Receivers & Transmitters

Universal Asynchronous Receiver-Transmitter, more commonly referred to as UART, is a type of serial communication interface. UART’s primary function is to transmit and receive data via a data bus. It allows two devices, such as computers, to carry out data transmission over a wired connection. UARTs convert incoming and outgoing data bytes into a serial bit stream.


These particular UARTs are stand-alone integrated circuits (ICs). However, you can also find UARTs within microcontrollers (MCUs).


UART ICs (integrated circuits) are semiconductor devices which can be integrated into your electronics designs to enable UART communication. UART is a popular method of communication in electronics projects. It enables computer hardware to communicate with other modems and serial devices.


When choosing a UART IC, ensure that it meets the requirements of the modem transmission rate.



What does a UART consist of?


One side of the UART feature around 8 data lines and the control pins. The other side of the UART has two serial wires, the Transmission (TX) and the Receiving (RX).



Communication Standards


UARTs may feature a communication standard which defines the signals between devices. These standards include RS-232, RS-422 and RS-485.



What is baud rate?


UART baud rate is the speed at which the data is transferred which is given in bits per second (bit/s or bps). The devices that you are communicating between should both have the same baud rate.



What does Asynchronous mean?


Asynchronous is a type of serial communication where the interfaces at each end are not synchronised by a common clock signal.



What is USART?


USART is very similar in functionality to a UART device. However, it also offers the possibility of a “synchronous” mode.


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Description Price Number of Channels per Chip Standard Supported Transmit FIFO Receive FIFO Maximum Data Rate Transmitter and Receiver FIFO Counter Mounting Type Package Type Pin Count Typical Operating Supply Voltage Dimensions Length Width Height
RS Stock No. 888-8722
Mfr. Part No.FT231XS-U
BrandFTDI Chip
SGD2.24
Each (In a Pack of 1160)
units
- - - - - - Surface Mount SSOP 20 - 8.74 x 3.99 x 1.5mm 8.74mm 3.99mm 1.5mm
RS Stock No. 700-4377
Mfr. Part No.XR21V1410IL16-F
BrandEXAR
SGD3.67
Each
units
- - - - - - Surface Mount QFN 16 - 3 x 3 x 0.88mm 3mm 3mm 0.88mm
RS Stock No. 662-3911
Mfr. Part No.TL16C452FNR
SGD8.70
Each
units
2 - - - 0.256Mbit/s - Surface Mount PLCC 68 5 V 24.23 x 24.23 x 4.06mm 24.23mm 24.23mm 4.06mm
RS Stock No. 162-4339
Mfr. Part No.TL16C450FN
SGD3.832
Each (In a Tube of 26)
units
1 - - - 0.256Mbit/s - Surface Mount PLCC 44 5 V 16.59 x 16.59 x 4.06mm 16.59mm 16.59mm 4.06mm
RS Stock No. 182-2570
Mfr. Part No.TL16C452FN
SGD9.91
Each
units
2 - - - 0.256Mbit/s - Surface Mount PLCC 68 5 V 24.23 x 24.23 x 4.06mm 24.23mm 24.23mm 4.06mm
RS Stock No. 687-7720
Mfr. Part No.FT2232HL
BrandFTDI Chip
SGD8.62
Each
units
2 RS232, RS422, RS485 - - 480Mbit/s - Surface Mount LQFP 64 - 10 x 10 x 1.4mm 10mm 10mm 1.4mm
RS Stock No. 170-4468
Mfr. Part No.XR21V1410IL16-F
BrandEXAR
SGD3.87
Each (In a Tray of 490)
units
- - - - - - Surface Mount QFN 16 - 3 x 3 x 0.88mm 3mm 3mm 0.88mm
RS Stock No. 182-2508
Mfr. Part No.TL16C450FN
SGD5.92
Each
units
1 - - - 0.256Mbit/s - Surface Mount PLCC 44 5 V 16.59 x 16.59 x 4.06mm 16.59mm 16.59mm 4.06mm
RS Stock No. 888-8716
Mfr. Part No.FT230XQ-T
BrandFTDI Chip
SGD3.163
Each (In a Pack of 10)
units
- - - - - - Surface Mount QFN 16 - 4 x 4 x 0.75mm 4mm 4mm 0.75mm
RS Stock No. 165-9901
Mfr. Part No.SC16C554BIB80,551
BrandNXP
SGD12.008
Each (In a Tray of 119)
units
4 UART 16B 16B 5Mbit/s Yes Surface Mount LQFP 80 2.5 V, 3.3 V, 5 V 12.1 x 12.1 x 1.5mm 12.1mm 12.1mm 1.5mm
RS Stock No. 757-0032
Mfr. Part No.FT231XS-R
BrandFTDI Chip
SGD3.255
Each (In a Pack of 2)
units
1 RS232, RS422, RS485, SIE, UART 512B 512B 3MBd Yes Surface Mount SSOP 20 5 V 0.344 x 0.157 x 0.059in 8.74mm 0.157in 1.5mm
RS Stock No. 165-9908
Mfr. Part No.SC16C752BIB48,151
BrandNXP
SGD7.435
Each (In a Tray of 250)
units
2 UART 64B 64B 5Mbit/s Yes Surface Mount LQFP 48 2.2 V, 2.5 V, 5 V 7.1 x 7.1 x 1.45mm 7.1mm 7.1mm 1.45mm
RS Stock No. 531-2522
Mfr. Part No.TL16C554APN
SGD14.96
Each
units
4 - 16B 16B 1MBd Yes Surface Mount LQFP 80 5 V 12 x 12 x 1.4mm 12mm 12mm 1.4mm
RS Stock No. 686-5932
Mfr. Part No.ST16C550IQ48-F
BrandEXAR
SGD4.59
Each
units
1 - 16B 16B 1.5Mbit/s Yes Surface Mount TQFP 48 2.97 → 5.5 V 7.1 x 7.1 x 1.05mm 7.1mm 7.1mm 1.05mm
RS Stock No. 170-4457
Mfr. Part No.XR17V258IV-F
BrandEXAR
SGD42.79
Each (In a Tube of 60)
units
8 IrDA 64B 64B 8Mbit/s Yes Surface Mount LQFP 144 3.3 V 20.1 x 20.1 x 1.45mm 20.1mm 20.1mm 1.45mm
RS Stock No. 545-8117
Mfr. Part No.TL16C754BPN
SGD25.21
Each
units
4 - 64B 64B 3Mbit/s - Surface Mount LQFP 80 2.7 → 5.5 V 12 x 12 x 1.4mm 12mm 12mm 1.4mm
RS Stock No. 923-7661
Mfr. Part No.MAX14830ETM+
BrandMaxim
SGD25.833
Each (In a Tube of 43)
units
4 RS485 - - 24MBd - Surface Mount TQFN 48 2.35 → 3.6 V 7.1 x 7.1 x 0.75mm 7.1mm 7.1mm 0.75mm
RS Stock No. 546-1472
Mfr. Part No.TL16C552FN
SGD15.61
Each
units
2 - 16B 16B 1Mbit/s - Surface Mount PLCC 68 5 V 24.23 x 24.23 x 4.06mm 24.23mm 24.23mm 4.06mm
RS Stock No. 170-4454
Mfr. Part No.XR16C2850CM-F
BrandEXAR
SGD19.67
Each (In a Tray of 250)
units
2 IrDA 128B 128B 6.25Mbit/s Yes Surface Mount TQFP 48 2.97 → 5.5 V 7.1 x 7.1 x 1.05mm 7.1mm 7.1mm 1.05mm
New
RS Stock No. 190-6193
Mfr. Part No.MAX3100CEE+T
BrandMaxim
SGD7.745
Each (On a Reel of 2500)
units
1 IrDA, RS232, RS485 - - - - Surface Mount QSOP 16 2.7 → 5.5 V 4.98 x 3.99 x 1.65mm 4.98mm 3.99mm 1.65mm
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