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 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 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 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 146-0456
製造零件編號SC28L202A1DGG,112
BrandNXP
HK$71.399
毎管:35 個
單位
2 - 256B 256B 2MBd - Surface Mount TSSOP 56 3 → 5.5 V 14.1 x 6.2 x 1.05mm 14.1mm 6.2mm 1.05mm
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 510-172
製造零件編號SC28L202A1DGG,112
BrandNXP
HK$95.88
單位
2 - 256B 256B 2MBd - Surface Mount TSSOP 56 3 → 5.5 V 14.1 x 6.2 x 1.05mm 14.1mm 6.2mm 1.05mm
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 346-6891
製造零件編號TL16C554FN
HK$101.99
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 178-5497
製造零件編號TL16C554FN
HK$139.881
毎管:18 個
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 923-1613
製造零件編號FT231XQ-R
BrandFTDI Chip
HK$14.206
個 (在毎卷:5000)
單位
- - - - - - - - - - - - - -
RS庫存編號 757-0014
製造零件編號FT220XS-R
BrandFTDI Chip
HK$16.05
/個 (每包:2個)
單位
1 SIE, UART 512B 512B 500kbit/s Yes Surface Mount SSOP 16 5 V 0.197 x 0.157 x 0.059in 5mm 0.157in 1.5mm
RS庫存編號 923-1616
製造零件編號FT240XQ-R
BrandFTDI Chip
HK$14.523
個 (在毎卷:5000)
單位
1 SIE 512B 512B 1Mbit/s Yes Surface Mount QFN 24 5 V 4 x 4 x 0.75mm 4mm 4mm 0.75mm
RS庫存編號 686-5932
製造零件編號ST16C550IQ48-F
BrandEXAR
HK$29.70
單位
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庫存編號 346-6863
製造零件編號TL16C550CPT
HK$37.69
單位
1 - 16B 16B 1MBd Yes Surface Mount LQFP 48 3 → 5.25 V 7 x 7 x 1.4mm 7mm 7mm 1.4mm
RS庫存編號 165-9908
製造零件編號SC16C752BIB48,151
BrandNXP
HK$39.421
Each (In a Tray of 250)
單位
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庫存編號 923-7248
製造零件編號MAX3111EEWI+G36
BrandMaxim
HK$111.902
毎管:25 個
單位
2 RS232, UART - - 0.25Mbit/s - Surface Mount SOIC W 28 3.3 V 18.1 x 7.6 x 2.35mm 18.1mm 7.6mm 2.35mm