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 769-5608
製造零件編號XR20M1172IG28-F
BrandEXAR
HK$51.00
單位
2 IrDA, RS232, RS422, RS485 64B 64B 16Mbit/s Yes Surface Mount TSSOP 28 1.6 → 3.6 V 9.8 x 4.5 x 1.05mm 9.8mm 4.5mm 1.05mm
RS庫存編號 923-1587
製造零件編號FT232HQ-REEL
BrandFTDI Chip
HK$24.03
個 (在毎卷:3000)
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
RS庫存編號 687-7720
製造零件編號FT2232HL
BrandFTDI Chip
HK$61.20
單位
2 RS232, RS422, RS485 - - 480Mbit/s - Surface Mount LQFP 64 - 10 x 10 x 1.4mm 10mm 10mm 1.4mm
RS庫存編號 170-4542
製造零件編號XR16V554DIV-F
BrandEXAR
HK$72.56
Each (In a Tray of 160)
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 124-2421
製造零件編號SC16IS752IPW,112
BrandNXP
HK$28.67
毎管:51 個
單位
2 IrDA 64B 64B 5Mbit/s - Surface Mount TSSOP 28 2.5 V, 3.3 V 9.8 x 4.5 x 0.75mm 9.8mm 4.5mm 0.75mm
全新
RS庫存編號 189-7772
製造零件編號MAX3100EEE+
HK$53.584
毎管:100 個
單位
1 IrDA 16B 16B 0.23MBd - Surface Mount QSOP 16 2.7 5.5 V 4.98 x 3.99 x 1.55mm 4.98mm 3.99mm 1.55mm
RS庫存編號 686-5948
製造零件編號ST16C554CQ64-F
BrandEXAR
HK$94.42
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 686-5884
製造零件編號ST16C2550CJ44-F
BrandEXAR
HK$63.40
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 700-4380
製造零件編號XR21V1414IM48-F
BrandEXAR
HK$61.89
單位
- - - - - - Surface Mount TQFP 48 - 7 x 7 x 1mm 7mm 7mm 1mm
RS庫存編號 769-5567
製造零件編號ST16C654IQ64-F
BrandEXAR
HK$150.44
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 686-5963
製造零件編號XR16C2850CM-F
BrandEXAR
HK$126.13
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 622-7964
製造零件編號MAX3100CEE+
HK$44.66
單位
1 IrDA 16B 16B 0.23MBd - Surface Mount QSOP 16 2.7 → 5.5 V 4.98 x 3.99 x 1.55mm 4.98mm 3.99mm 1.55mm
RS庫存編號 170-4449
製造零件編號ST16C554DCJ68-F
BrandEXAR
HK$72.14
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 786-1001
製造零件編號MAX3140CEI+
HK$58.29
單位
1 RS422, RS485 - - 230kBd - Surface Mount QSOP 28 4.75 → 5.25 V 9.98 x 3.99 x 1.5mm 9.98mm 3.99mm 1.5mm
RS庫存編號 847-2901
製造零件編號XR16L2750CM-F
BrandEXAR
HK$68.85
單位
2 IrDA, RS422, RS485 - - 6.25Mbit/s Yes Surface Mount TQFP 48 2.5 V, 3.3 V, 5 V 7.1 x 7.1 x 1.05mm 7.1mm 7.1mm 1.05mm
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 170-4446
製造零件編號ST16C550CQ48-F
BrandEXAR
HK$29.01
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 913-4225
製造零件編號ST16C2550CQ48-F
BrandEXAR
HK$44.276
Each (In a Tray of 250)
單位
2 RS232, RS485 16B 16B 4Mbit/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 546-1472
製造零件編號TL16C552FN
HK$91.99
單位
2 - 16B 16B 1Mbit/s - 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 769-5560
製造零件編號ST16C654DIQ64-F
BrandEXAR
HK$150.44
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