Stmicroelectronics ST3232B 3 to 5.5 V, Low-power, Up to 400 Kbs RS-232 Drivers and Receivers

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The ST3232B device consists of two line drivers, two line receivers, it provides the electrical interface between an asynchronous communication controller and the serial-port connector. The charge pump and four small external capacitors allow operation from a single 3-V to 5.5-V supply. The 3 V powered ST3232B and ST3232C devices are low power consumption, high data rate capable EIA/TIA-232 and V.28/V.24 communication interfaces. These devices function as true RS-232 devices from 3 to 5.5 V supplies thanks to a proprietary low dropout transmitter output stage. Just four tiny, standard external capacitors with a 0.1 mF value are needed for the devices to function on a 3 V supply.


  • 300 µA supply current

  • 300 kbps minimum guaranteed data rate

  • 6 V/µs minimum guaranteed slew rate

  • Meets EIA/TIA-232 specifications down to 3 V

Operating Voltage 3.3V to 5V
Brand STMicroelectronics
No. of Pins 16
Package SO16
Mounting Type SMD
Part Number ST3232B

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