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 170-4458
製造零件編號XR82C684CJ-F
BrandEXAR
HK$111.773
毎管:19 個
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 170-4467
製造零件編號XR17V358IB176-F
BrandEXAR
HK$111.33
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 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 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 923-1593
製造零件編號FT201XS-R
BrandFTDI Chip
HK$12.992
個 (在毎卷:3000)
單位
1 SIE, UART 512B 512B 3.4Mbit/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 913-4244
製造零件編號XR16L788CQ-F
BrandEXAR
HK$200.055
Each (In a Tray of 66)
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
全新
RS庫存編號 190-7271
製造零件編號MAX3100CEE+T
HK$82.80
單位
- - - - - - - - - - - - - -
RS庫存編號 170-4580
製造零件編號XR16C850CM-F
BrandEXAR
HK$65.747
Each (In a Tray of 250)
單位
1 IrDA, RS232, RS422, RS485 - - 2Mbit/s Yes Surface Mount TQFP 48 3.3 V, 5 V 7.1 x 7.1 x 1.05mm 7.1mm 7.1mm 1.05mm
RS庫存編號 700-4371
製造零件編號XR21V1412IL32-F
BrandEXAR
HK$38.77
單位
- - - - - - Surface Mount QFN 32 - 5 x 5 x 0.88mm 5mm 5mm 0.88mm
RS庫存編號 686-6005
製造零件編號XR17D152CM-F
BrandEXAR
HK$133.74
單位
2 RS232, RS422, RS485 64B 64B 6.25Mbit/s Yes Surface Mount TQFP 100 5 V 14.1 x 14.1 x 1.05mm 14.1mm 14.1mm 1.05mm
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 686-5884
製造零件編號ST16C2550CJ44-F
BrandEXAR
HK$52.85
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 170-4447
製造零件編號ST16C550IQ48-F
BrandEXAR
HK$33.458
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 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 170-4513
製造零件編號ST16C654DIQ64-F
BrandEXAR
HK$104.254
Each (In a Tray of 160)
單位
4 IrDA, RS232, RS422, RS485 64B 64B 1.5Mbit/s - Surface Mount LQFP 64 2.97 → 5.5 V 10 x 10 x 1.4mm 10mm 10mm 1.4mm
RS庫存編號 769-6071
製造零件編號ST16C1550CJ28-F
BrandEXAR
HK$42.35
單位
1 RS232, RS422, RS485 16B 16B 1.5Mbit/s - Surface Mount PLCC 28 2.97 → 5.5 V 11.58 x 11.58 x 4.57mm 11.58mm 11.58mm 4.57mm
RS庫存編號 545-8117
製造零件編號TL16C754BPN
HK$150.08
單位
4 - 64B 64B 3Mbit/s - Surface Mount LQFP 80 2.7 → 5.5 V 12 x 12 x 1.4mm 12mm 12mm 1.4mm
RS庫存編號 700-4380
製造零件編號XR21V1414IM48-F
BrandEXAR
HK$56.89
單位
- - - - - - Surface Mount TQFP 48 - 7 x 7 x 1mm 7mm 7mm 1mm
RS庫存編號 162-4339
製造零件編號TL16C450FN
HK$21.646
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
全新
RS庫存編號 189-7773
製造零件編號MAX3107EAG+
HK$51.395
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