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. 182-2570
Mfr. Part No.TL16C452FN
HK$66.76
Each
units
2 - - - 0.256Mbit/s - Surface Mount PLCC 68 5 V 24.23 x 24.23 x 4.06mm - - -
RS Stock No. 162-8368
Mfr. Part No.TIR1000PSR
HK$5.693
Each (On a Reel of 2000)
units
- - - - - - Surface Mount SOIC 8 - 6.5 x 5.6 x 1.85mm - - -
RS Stock No. 162-4339
Mfr. Part No.TL16C450FN
HK$34.546
Each (In a Tube of 26)
units
1 - - - 0.256Mbit/s - Surface Mount PLCC 44 5 V 16.59 x 16.59 x 4.06mm - - -
RS Stock No. 662-3911
Mfr. Part No.TL16C452FNR
HK$58.35
Each
units
2 - - - 0.256Mbit/s - Surface Mount PLCC 68 5 V 24.23 x 24.23 x 4.06mm - - -
RS Stock No. 662-3921
Mfr. Part No.TL16C550CPTR
HK$43.754
Each (In a Pack of 5)
units
1 - 16B 16B 1MBd Yes Surface Mount LQFP 48 3 → 5.25 V 7 x 7 x 1.4mm - - -
RS Stock No. 814-4032
Mfr. Part No.TIR1000PSR
HK$14.91
Each (On a Tape of 5)
units
- - - - - - Surface Mount SOIC 8 - 6.5 x 5.6 x 1.85mm - - -
RS Stock No. 346-6863
Mfr. Part No.TL16C550CPT
HK$52.56
Each
units
1 - 16B 16B 1MBd Yes Surface Mount LQFP 48 3 → 5.25 V 7 x 7 x 1.4mm - - -
RS Stock No. 121-8491
Mfr. Part No.TL16C452FN
HK$55.878
Each (In a Tube of 18)
units
- - - - - - - - - - - - - -
RS Stock No. 662-3915
Mfr. Part No.TL16C550CFNR
HK$43.012
Each (In a Pack of 5)
units
1 - 16B 16B 1MBd Yes Surface Mount PLCC 44 3 → 5.25 V 16.59 x 16.59 x 4.06mm - - -
RS Stock No. 162-7083
Mfr. Part No.TL16C550CPTR
HK$18.56
Each (On a Reel of 1000)
units
1 - 16B 16B 1MBd Yes Surface Mount LQFP 48 3 → 5.25 V 7 x 7 x 1.4mm - - -
RS Stock No. 182-2508
Mfr. Part No.TL16C450FN
HK$40.63
Each
units
1 - - - 0.256Mbit/s - Surface Mount PLCC 44 5 V 16.59 x 16.59 x 4.06mm - - -
RS Stock No. 162-7082
Mfr. Part No.TL16C452FNR
HK$36.575
Each (On a Reel of 250)
units
2 - - - 0.256Mbit/s - Surface Mount PLCC 68 5 V 24.23 x 24.23 x 4.06mm - - -
RS Stock No. 178-9093
Mfr. Part No.TL16C550CFNR
HK$56.905
Each (In a Tube of 26)
units
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