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 Stock No. 124-2420
Mfr. Part No.SC16C2550BIB48,151
BrandNXP
PHP278.859
Each (In a Tray of 250)
units
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 Stock No. 797-4737
Mfr. Part No.SC16C2550BIB48,151
BrandNXP
PHP383.30
Each
units
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 Stock No. 725-8843
Mfr. Part No.SC16C550BIB48,128
BrandNXP
PHP143.51
Each
units
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 Stock No. 124-2422
Mfr. Part No.SC16IS762IPW,112
BrandNXP
PHP313.002
Each (In a Tube of 51)
units
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 Stock No. 816-0239
Mfr. Part No.SC16IS762IPW,112
BrandNXP
PHP319.63
Each (In a Pack of 3)
units
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 Stock No. 797-4753
Mfr. Part No.SC16C752BIB48,151
BrandNXP
PHP307.22
Each
units
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 Stock No. 165-9902
Mfr. Part No.SC16C654DBIB64,151
BrandNXP
PHP509.87
Each (In a Tray of 160)
units
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 Stock No. 725-8846
Mfr. Part No.SC16IS752IPW,112
BrandNXP
PHP246.17
Each
units
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 Stock No. 165-9908
Mfr. Part No.SC16C752BIB48,151
BrandNXP
PHP212.489
Each (In a Tray of 250)
units
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 Stock No. 484-1445
Mfr. Part No.SC28L92A1B,551
BrandNXP
PHP783.02
Each
units
2 - 16B 16B 0.23MBd - Surface Mount PQFP 44 2.97 → 5.5 V 10 x 10 x 1.75mm - - -
RS Stock No. 166-0323
Mfr. Part No.SC16C550BIB48,128
BrandNXP
PHP107.531
Each (On a Reel of 2000)
units
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 Stock No. 124-2421
Mfr. Part No.SC16IS752IPW,112
BrandNXP
PHP223.807
Each (In a Tube of 51)
units
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 Stock No. 124-2426
Mfr. Part No.SC28L92A1B,551
BrandNXP
PHP574.696
Each (In a Tray of 96)
units
2 - 16B 16B 0.23MBd - Surface Mount PQFP 44 2.97 → 5.5 V 10 x 10 x 1.75mm - - -
RS Stock No. 797-4759
Mfr. Part No.SC16C654DBIB64,151
BrandNXP
PHP700.75
Each
units
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 - - -