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庫存編號 786-0907
製造零件編號MAX14830ETM+
BrandMaxim
HK$182.91
單位
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庫存編號 913-4250
製造零件編號XR82C684CJ/44-F
BrandEXAR
HK$127.87
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 686-6055
製造零件編號XR82C684CJ/44-F
BrandEXAR
HK$141.60
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 923-7661
製造零件編號MAX14830ETM+
BrandMaxim
HK$147.964
毎管:43 個
單位
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庫存編號 888-8716
製造零件編號FT230XQ-T
BrandFTDI Chip
HK$13.585
/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$13.817
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$18.29
/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 162-7086
製造零件編號TL16C554FNR
HK$92.767
個 (在毎卷:250)
單位
4 - 16B 16B 1MBd Yes Surface Mount PLCC 68 5 V 24.23 x 24.23 x 4.06mm 24.23mm 24.23mm 4.06mm
RS庫存編號 662-3946
製造零件編號TL16C554FNR
HK$73.71
單位
4 - 16B 16B 1MBd Yes Surface Mount PLCC 68 5 V 24.23 x 24.23 x 4.06mm 24.23mm 24.23mm 4.06mm
RS庫存編號 797-4765
製造零件編號SC26C92C1A
BrandNXP
HK$70.69
單位
2 UART - - 230.4kbit/s Yes Surface Mount PLCC 44 5 V 16.66 x 16.66 x 4.06mm 16.66mm 16.66mm 4.06mm
RS庫存編號 686-6064
製造零件編號XR82C684CJ-F
BrandEXAR
HK$150.44
單位
4 UART - - 1Mbit/s - Surface Mount PLCC 68 5 V 24.33 x 24.33 x 3.68mm 24.33mm 24.33mm 3.68mm
RS庫存編號 165-9591
製造零件編號MAX3107EAG+
BrandMaxim
HK$88.502
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 545-8072
製造零件編號TL16C554PN
HK$114.17
單位
4 - 16B 16B 1MBd Yes Surface Mount LQFP 80 5 V 12 x 12 x 1.4mm 12mm 12mm 1.4mm
RS庫存編號 797-4759
製造零件編號SC16C654DBIB64,151
BrandNXP
HK$82.66
單位
4 UART 64B 64B 5Mbit/s Yes Surface Mount LQFP 64 2.5 V, 3.3 V, 5 V 10.1 x 10.1 x 1.45mm 10.1mm 10.1mm 1.45mm
RS庫存編號 170-4470
製造零件編號XR16M890IL32-F
BrandEXAR
HK$30.622
Each (In a Tray of 490)
單位
1 RS232, RS422, RS485 UART 128B 128B 24Mbit/s Yes Surface Mount QFN 32 1.8 V, 2.5 V, 3.3 V 5 x 5 x 0.88mm 5mm 5mm 0.88mm
RS庫存編號 686-5904
製造零件編號ST16C2552CJ44TR-F
BrandEXAR
HK$47.83
單位
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庫存編號 170-4448
製造零件編號ST16C552CJ68-F
BrandEXAR
HK$57.822
毎管:19 個
單位
2 - 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 170-4454
製造零件編號XR16C2850CM-F
BrandEXAR
HK$112.96
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 686-5948
製造零件編號ST16C554CQ64-F
BrandEXAR
HK$83.96
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 124-2422
製造零件編號SC16IS762IPW,112
BrandNXP
HK$29.167
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