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庫存編號 686-6055
製造零件編號XR82C684CJ/44-F
BrandMaxLinear
HK$145.33
單位
4 - - - 1Mbit/s - Surface Mount PLCC 44 5 V 16.66 x 16.66 x 3.68mm 16.66mm 16.66mm 3.68mm
RS庫存編號 913-4250
製造零件編號XR82C684CJ/44-F
BrandMaxLinear
HK$127.71
毎管:27 個
單位
4 - - - 1Mbit/s - Surface Mount PLCC 44 5 V 16.66 x 16.66 x 3.68mm 16.66mm 16.66mm 3.68mm
RS庫存編號 888-8716
製造零件編號FT230XQ-T
BrandFTDI Chip
HK$16.587
/個 (每包:10個)
單位
- - - - - - Surface Mount QFN 16 - 4 x 4 x 0.75mm 4mm 4mm 0.75mm
RS庫存編號 923-1597
製造零件編號FT230XQ-R
BrandFTDI Chip
HK$11.381
個 (在毎卷:5000)
單位
1 RS232, RS422, RS485, SIE, UART 512B 512B 3MBd Yes Surface Mount QFN 16 5 V 4 x 4 x 0.75mm 4mm 4mm 0.75mm
RS庫存編號 757-0026
製造零件編號FT230XQ-R
BrandFTDI Chip
HK$17.985
/個 (每包:2個)
單位
1 RS232, RS422, RS485, SIE, UART 512B 512B 3MBd Yes Surface Mount QFN 16 5 V 4 x 4 x 0.75mm 4mm 4mm 0.75mm
RS庫存編號 170-4451
製造零件編號ST16C554CQ64-F
BrandEXAR
HK$73.85
Each (In a Tray of 160)
單位
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庫存編號 170-4452
製造零件編號ST16C650ACQ48-F
BrandEXAR
HK$41.427
Each (In a Tray of 250)
單位
1 IrDA 32B 32B 3.125Mbit/s Yes Surface Mount TQFP 48 2.9 → 5.5 V 7.1 x 7.1 x 1.05mm 7.1mm 7.1mm 1.05mm
RS庫存編號 189-7772
製造零件編號MAX3100EEE+
HK$50.501
毎管:100 個
單位
1 IrDA 16B 16B 0.23MBd - Surface Mount QSOP 16 2.7 → 5.5 V 4.98 x 3.99 x 1.55mm 4.98mm 3.99mm 1.55mm
RS庫存編號 725-8843
製造零件編號SC16C550BIB48,128
BrandNXP
HK$22.93
單位
1 UART 16B 16B 3Mbit/s - Surface Mount LQFP 48 2.5 V, 3.3 V, 5 V 7 x 7 x 1.4mm 7mm 7mm 1.4mm
RS庫存編號 686-5890
製造零件編號ST16C2550IQ48-F
BrandMaxLinear
HK$73.42
單位
2 RS232, RS485 16B 16B 4Mbit/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庫存編號 170-4453
製造零件編號ST16C554DIJ68-F
BrandEXAR
HK$91.371
毎管:19 個
單位
4 - 16B 16B 1.5Mbit/s Yes Surface Mount PLCC 68 2.97 → 5.5 V 24.33 x 24.33 x 3.68mm 24.33mm 24.33mm 3.68mm
RS庫存編號 170-4468
製造零件編號XR21V1410IL16-F
BrandEXAR
HK$20.621
Each (In a Tray of 490)
單位
- - - - - - Surface Mount QFN 16 - 3 x 3 x 0.88mm 3mm 3mm 0.88mm
RS庫存編號 124-2422
製造零件編號SC16IS762IPW,112
BrandNXP
HK$38.93
毎管:51 個
單位
2 IrDA, UART - - 5Mbit/s Yes Surface Mount TSSOP 28 2.5 V, 3.3 V 9.8 x 4.5 x 0.95mm 9.8mm 4.5mm 0.95mm
RS庫存編號 189-7773
製造零件編號MAX3107EAG+
HK$52.973
毎管:58 個
單位
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庫存編號 769-5620
製造零件編號XR88C681J-F
BrandMaxLinear
HK$75.89
單位
2 RS232, RS422, RS485 1B 3B 1Mbit/s - Surface Mount PLCC 44 5 V 16.66 x 16.66 x 4.57mm 16.66mm 16.66mm 4.57mm
RS庫存編號 170-4454
製造零件編號XR16C2850CM-F
BrandEXAR
HK$85.665
Each (In a Tray of 250)
單位
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
RS庫存編號 888-8722
製造零件編號FT231XS-U
BrandFTDI Chip
HK$13.09
/個 (每包:1160個)
單位
- - - - - - Surface Mount SSOP 20 - 8.74 x 3.99 x 1.5mm 8.74mm 3.99mm 1.5mm
全新
RS庫存編號 203-5827
製造零件編號MAX17841BGUE/V+
HK$69.10
單位
1 UART - - 2Mbps - - TSSOP 16 3.1 → 3.5 V - - - -
RS庫存編號 190-1351
製造零件編號MAX3107ETG+
HK$59.935
/個 (每包:2個)
單位
1 RS232, RS485 - - 24Mbps Yes Surface Mount TQFN 24 2.35 → 3.6 V 3.6 x 3.6 x 0.75mm 3.6mm 3.6mm 0.75mm
RS庫存編號 757-0017
製造零件編號FT200XD-R
BrandFTDI Chip
HK$16.255
/個 (每包:2個)
單位
1 SIE, UART 512B 512B 3.4Mbit/s Yes Surface Mount DFN 10 5 V 3 x 3 x 0.75mm 3mm 3mm 0.75mm