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 757-0045
製造零件編號FT231XQ-R
BrandFTDI Chip
HK$17.775
/個 (每包:2個)
單位
- - - - - - - - - - - - - -
RS庫存編號 686-6001
製造零件編號XR16L788IQ-F
BrandEXAR
HK$239.37
單位
8 IrDA 64B 64B 6.25Mbit/s Yes Surface Mount PQFP 100 2.97 → 5.5 V 20.1 x 14.1 x 3.05mm 20.1mm 14.1mm 3.05mm
RS庫存編號 888-8722
製造零件編號FT231XS-U
BrandFTDI Chip
HK$12.828
/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
RS庫存編號 531-2500
製造零件編號TL16C552AFN
HK$73.88
單位
2 - 16B 16B 1MBd - 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 757-0010
製造零件編號FT230XS-R
BrandFTDI Chip
HK$15.43
/個 (每包:2個)
單位
1 RS232, RS422, RS485, SIE, UART 512B 512B 3MBd 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 531-2522
製造零件編號TL16C554APN
HK$89.98
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 686-5945
製造零件編號ST16C554DCQ64-F
BrandEXAR
HK$82.09
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 170-9073
製造零件編號FT232RQ-REEL
BrandFTDI Chip
HK$19.77
個 (在毎卷:6000)
單位
1 RS232, RS422, RS485 UART 256B 128B 3MBd - Surface Mount QFN 32 5 V 5 x 5mm 5mm 5mm -
RS庫存編號 646-6327
製造零件編號PC16552DV/NOPB
HK$92.66
單位
2 - 16B 16B 1.5MBd Yes Surface Mount PLCC 44 5 V 16.51 x 16.51 x 3.68mm 16.51mm 16.51mm 3.68mm
RS庫存編號 346-6863
製造零件編號TL16C550CPT
HK$42.01
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 686-5932
製造零件編號ST16C550IQ48-F
BrandEXAR
HK$49.98
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 170-4453
製造零件編號ST16C554DIJ68-F
BrandEXAR
HK$94.256
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 700-4371
製造零件編號XR21V1412IL32-F
BrandEXAR
HK$50.23
單位
- - - - - - Surface Mount QFN 32 - 5 x 5 x 0.88mm 5mm 5mm 0.88mm
RS庫存編號 162-4339
製造零件編號TL16C450FN
HK$34.722
毎管:26 個
單位
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庫存編號 662-3921
製造零件編號TL16C550CPTR
HK$34.966
/個 (每包:5個)
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 730-0168
製造零件編號FT232RQ-REEL
BrandFTDI Chip
HK$37.74
單位
1 RS232, RS422, RS485 UART 256B 128B 3MBd - Surface Mount QFN 32 5 V 5 x 5mm 5mm 5mm -
RS庫存編號 778-0898
製造零件編號XR16V554DIV-F
BrandEXAR
HK$96.02
單位
4 - 16B 16B 4Mbit/s - Surface Mount LQFP 64 2.25 → 3.6 V 10.1 x 10.1 x 1.45mm 10.1mm 10.1mm 1.45mm
RS庫存編號 797-4759
製造零件編號SC16C654DBIB64,151
BrandNXP
HK$102.16
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 686-6067
製造零件編號XR88C681CJ-F
BrandEXAR
HK$71.45
單位
2 - - - 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 923-1581
製造零件編號FT230XS-R
BrandFTDI Chip
HK$13.818
個 (在毎卷:3000)
單位
1 RS232, RS422, RS485, SIE, UART 512B 512B 3MBd Yes Surface Mount SSOP 16 5 V 0.197 x 0.157 x 0.059in 5mm 0.157in 1.5mm