Universal Asynchronous Receivers & Transmitters

Universal Asynchronous Receiver-Transmitter, more commonly referred to as UART, is a type of serial communication interface. UARTs 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. 913-4222
Mfr. Part No.ST16C2552CJ44TR-F
BrandMaxLinear
MYR22.113
Each (On a Reel of 500)
units
2 RS232, RS485 16B 16B 4Mbit/s Yes Surface Mount PLCC 44 2.97 → 5.5 V 16.66 x 16.66 x 3.68mm 16.66mm 16.66mm 3.68mm
RS Stock No. 170-4446
Mfr. Part No.ST16C550CQ48-F
BrandEXAR
MYR13.87
Each (In a Tray of 250)
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. 162-7083
Mfr. Part No.TL16C550CPTR
MYR13.45
Each (On a Reel of 1000)
units
1 - 16B 16B 1MBd Yes Surface Mount LQFP 48 3 → 5.25 V 7 x 7 x 1.4mm 7mm 7mm 1.4mm
RS Stock No. 662-3921
Mfr. Part No.TL16C550CPTR
MYR17.06
Each (In a Pack of 5)
units
1 - 16B 16B 1MBd Yes Surface Mount LQFP 48 3 → 5.25 V 7 x 7 x 1.4mm 7mm 7mm 1.4mm
RS Stock No. 686-6055
Mfr. Part No.XR82C684CJ/44-F
BrandMaxLinear
MYR70.39
Each
units
4 - - - 1Mbit/s - Surface Mount PLCC 44 5 V 16.66 x 16.66 x 3.68mm 16.66mm 16.66mm 3.68mm
RS Stock No. 170-4447
Mfr. Part No.ST16C550IQ48-F
BrandEXAR
MYR16.11
Each (In a Tray of 250)
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. 170-4580
Mfr. Part No.XR16C850CM-F
BrandEXAR
MYR38.57
Each (In a Tray of 250)
units
1 IrDA, RS232, RS422, RS485 - - 2Mbit/s Yes Surface Mount TQFP 48 3.3 V, 5 V 7.1 x 7.1 x 1.05mm 7.1mm 7.1mm 1.05mm
RS Stock No. 662-3911
Mfr. Part No.TL16C452FNR
MYR27.03
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. 814-4032
Mfr. Part No.TIR1000PSR
MYR6.536
Each (On a Tape of 5)
units
- - - - - - Surface Mount SOIC 8 - 6.5 x 5.6 x 1.85mm 6.5mm 5.6mm 1.85mm
RS Stock No. 686-5957
Mfr. Part No.ST16C554DIQ64-F
BrandMaxLinear
MYR46.71
Each
units
4 - 16B 16B 1.5Mbit/s Yes Surface Mount LQFP 64 2.97 → 5.5 V 10.1 x 10.1 x 1.45mm 10.1mm 10.1mm 1.45mm
RS Stock No. 189-7773
Mfr. Part No.MAX3107EAG+
MYR27.252
Each (In a Tube of 58)
units
1 RS232, RS485 - - 24Mbps Yes Surface Mount SSOP 24 2.35 → 3.6 V 8.33 x 5.38 x 1.78mm 8.33mm 5.38mm 1.78mm
RS Stock No. 757-0045
Mfr. Part No.FT231XQ-R
BrandFTDI Chip
MYR8.67
Each (In a Pack of 2)
units
- - - - - - - - - - - - - -
RS Stock No. 913-4234
Mfr. Part No.ST16C554DCQ64-F
BrandMaxLinear
MYR30.835
Each (In a Tray of 160)
units
4 - 16B 16B 1.5Mbit/s Yes Surface Mount LQFP 64 2.97 → 5.5 V 10.1 x 10.1 x 1.45mm 10.1mm 10.1mm 1.45mm
RS Stock No. 200-1783
Mfr. Part No.FT232HL-TRAY
BrandFTDI Chip
MYR22.11
Each (In a Pack of 2)
units
1 - - - 12Mbps - - LQFP 48 2.97 V - - - -
RS Stock No. 797-4753
Mfr. Part No.SC16C752BIB48,151
BrandNXP
MYR26.65
Each
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. 662-5309
Mfr. Part No.TL16C554AIPN
MYR45.24
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. 686-6067
Mfr. Part No.XR88C681CJ-F
BrandMaxLinear
MYR34.85
Each
units
2 - - - 1Mbit/s - Surface Mount PLCC 44 5 V 16.66 x 16.66 x 3.68mm 16.66mm 16.66mm 3.68mm
RS Stock No. 200-1777
Mfr. Part No.FT230XQ-T
BrandFTDI Chip
MYR8.02
Each (In a Tray of 490)
units
1 RS232, RS422, RS485, SIE, UART - - 3Mbps - - QFN 16 5 V - - - -
RS Stock No. 531-2522
Mfr. Part No.TL16C554APN
MYR43.89
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. 700-4374
Mfr. Part No.XR17V358IB176-F
BrandEXAR
MYR68.83
Each
units
8 IrDA 256B 256B 25Mbit/s Yes Surface Mount FBGA 176 3.3 V 13.1 x 13.1 x 1.15mm 13.1mm 13.1mm 1.15mm
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