SMD MAX232 Dual RS-232 Driver/Receiver IC
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Prices updated: 13 Oct 2026
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About this product
The MAX232 is a dual RS-232 driver/receiver IC that converts 5 V TTL/CMOS logic levels to RS-232 voltage levels and back. It is used to connect a microcontroller UART to a PC serial port or legacy serial devices. This listing is the surface-mount version.
Specifications
- Interface standard
- RS-232 (EIA-232)
- Drivers / receivers
- 2 / 2
- Supply voltage
- 4.5 V to 5.5 V
- Mounting
- SMD
Frequently asked questions
Does the MAX232 need external components?
Yes. The original MAX232 uses a charge pump that needs four external capacitors, typically 1 µF each, to generate the RS-232 voltage levels. Check the datasheet of your exact variant for the recommended values.
Can I connect RS-232 lines directly to an Arduino or ESP32 pin?
No. RS-232 levels are much higher than 3.3 V or 5 V logic and can damage the microcontroller. Connect the TTL side of the MAX232 to the UART TX and RX pins, and the RS-232 side to the DB9 or serial connector.
