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 923-1597
製造零件編號FT230XQ-R
BrandFTDI Chip
HK$12.508
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 888-8716
製造零件編號FT230XQ-T
BrandFTDI Chip
HK$17.747
/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 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 686-5954
製造零件編號ST16C554DIJ68-F
BrandMaxLinear
HK$105.68
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 757-0014
製造零件編號FT220XS-R
BrandFTDI Chip
HK$17.985
/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 923-1590
製造零件編號FT200XD-R
BrandFTDI Chip
HK$12.072
個 (在毎卷:5000)
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
RS庫存編號 200-1782
製造零件編號FT232HL-TRAY
BrandFTDI Chip
HK$28.026
Each (In a Tray of 250)
單位
1 - - - 12Mbps - - LQFP 48 2.97 V - - - -
RS庫存編號 170-4467
製造零件編號XR17V358IB176-F
BrandEXAR
HK$114.495
Each (In a Tray of 160)
單位
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
RS庫存編號 170-4447
製造零件編號ST16C550IQ48-F
BrandEXAR
HK$28.737
Each (In a Tray of 250)
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 923-1581
製造零件編號FT230XS-R
BrandFTDI Chip
HK$12.339
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
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 124-2426
製造零件編號SC28L92A1B,551
BrandNXP
HK$89.631
Each (In a Tray of 96)
單位
2 - 16B 16B 0.23MBd - Surface Mount PQFP 44 2.97 → 5.5 V 10 x 10 x 1.75mm 10mm 10mm 1.75mm
RS庫存編號 178-9093
製造零件編號TL16C550CFNR
HK$56.905
毎管:26 個
單位
1 - 16B 16B 1MBd Yes Surface Mount PLCC 44 3 → 5.25 V 16.59 x 16.59 x 4.06mm 16.59mm 16.59mm 4.06mm
RS庫存編號 797-4753
製造零件編號SC16C752BIB48,151
BrandNXP
HK$47.07
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 797-4737
製造零件編號SC16C2550BIB48,151
BrandNXP
HK$52.71
單位
2 UART 16B 16B 5Mbit/s Yes Surface Mount LQFP 48 2.5 V, 3.3 V, 5 V 7.1 x 7.1 x 1.6mm 7.1mm 7.1mm 1.6mm
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
1 - - - - - Surface Mount QFN 16 - 3 x 3 x 0.88mm 3mm 3mm 0.88mm
RS庫存編號 170-4518
製造零件編號XR88C681J-F
BrandEXAR
HK$64.777
毎管:27 個
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 737-7852
製造零件編號FT232HQ-REEL
BrandFTDI Chip
HK$37.46
單位
1 RS232, RS422, RS485 UART - - 12Mbit/s - Surface Mount QFN 48 1.8 V, 3.3 V 7 x 7 x 1.4mm 7mm 7mm 1.4mm