MAX3232 RS-232 to TTL Level Converter IC SOP-16
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Prices updated: 13 Oct 2026
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About this product
The MAX3232 is a dual RS-232 driver and receiver IC that converts TTL/CMOS logic levels to RS-232 voltage levels and back. It operates from 3V to 5.5V, so it works with both 3.3V and 5V microcontrollers, at data rates up to 120 kbit/s. It is commonly used to connect microcontroller UART pins to legacy serial ports and DB9 connectors.
Specifications
- Supply voltage
- 3 V to 5.5 V
- Driver/receiver channels
- 2 (dual)
- Data rate
- 120 kbit/s
- RS-232 input levels
- ±30 V
- Operating current
- 8 mA
- Package
- SOP-16 SMD
Frequently asked questions
Does the MAX3232 need external components?
Yes. It uses an internal charge pump that requires four external capacitors, typically 0.1 µF, connected between C1+/C1-, C2+/C2-, V+ and V-.
How do I connect it to a microcontroller UART?
Connect the TTL-side inputs to the microcontroller TX pin and the TTL-side outputs to its RX pin. On the RS-232 side, connect to the TX and RX lines of the serial connector, share the ground, and swap TX/RX lines as needed for your device type.
