SLVSJY8 November 2025 THVD4431A
PRODUCTION DATA
THVD4431A has integrated high-efficiency and low-noise charge pump to generate large output voltages for RS-232 signals. Charge pump consists of a voltage doubler and an inverter to regulate the voltage to nominal ± 5.5V or to ±9.5V for 3.3V or 5V VCC operation respectively. This also includes UV protection mechanism. Charge pump needs four external ceramic capacitors (2 flying capacitors and 2 storage capacitors) and allows for single supply operation for RS-232. For a generic description of RS-232 charge pump operation, please refer to the blog: How the RS-232 transceiver’s regulated charge-pump circuitry works.