UART

UART stands for Universal Asynchronous Receiver-Transmitter. UART is a type of serial communication interface designed 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. Asynchronous is a type of serial communication where the interfaces at each end are not synchronised by a common clock signal.

These particular UART devices are stand-alone integrated circuits (ICs). However, you can also find UARTs within microcontrollers (MCUs), as they only require two wires for communication.

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).

Where is UART used?

  • Microcontroller based devices
  • GPS receivers
  • Bluetooth devices
  • Modems
  • Wireless communications

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.


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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 165-9902
製造零件編號SC16C654DBIB64,151
BrandNXP
HK$74.212
Each (In a Tray of 160)
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 - - -
RS庫存編號 797-4759
製造零件編號SC16C654DBIB64,151
BrandNXP
HK$122.38
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 - - -
RS庫存編號 797-4737
製造零件編號SC16C2550BIB48,151
BrandNXP
HK$56.85
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 - - -
RS庫存編號 124-2420
製造零件編號SC16C2550BIB48,151
BrandNXP
HK$37.018
Each (In a Tray of 250)
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 - - -
RS庫存編號 124-2422
製造零件編號SC16IS762IPW,112
BrandNXP
HK$44.331
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 - - -
RS庫存編號 124-2421
製造零件編號SC16IS752IPW,112
BrandNXP
HK$31.374
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 - - -
RS庫存編號 124-2426
製造零件編號SC28L92A1B,551
BrandNXP
HK$91.134
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 - - -
RS庫存編號 725-8843
製造零件編號SC16C550BIB48,128
BrandNXP
HK$24.50
單位
1 UART 16B 16B 3Mbit/s - Surface Mount LQFP 48 2.5 V, 3.3 V, 5 V 7 x 7 x 1.4mm - - -
RS庫存編號 484-1445
製造零件編號SC28L92A1B,551
BrandNXP
HK$103.47
單位
2 - 16B 16B 0.23MBd - Surface Mount PQFP 44 2.97 → 5.5 V 10 x 10 x 1.75mm - - -
RS庫存編號 166-0323
製造零件編號SC16C550BIB48,128
BrandNXP
HK$13.681
個 (在毎卷:2000)
單位
1 UART 16B 16B 3Mbit/s - Surface Mount LQFP 48 2.5 V, 3.3 V, 5 V 7 x 7 x 1.4mm - - -
RS庫存編號 165-9908
製造零件編號SC16C752BIB48,151
BrandNXP
HK$30.231
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 - - -
RS庫存編號 816-0239
製造零件編號SC16IS762IPW,112
BrandNXP
HK$52.18
/個 (每包:3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 - - -
RS庫存編號 797-4753
製造零件編號SC16C752BIB48,151
BrandNXP
HK$48.30
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 - - -
RS庫存編號 725-8846
製造零件編號SC16IS752IPW,112
BrandNXP
HK$39.89
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 - - -