Before revision: MAX232 chip in DIP-16 package upThe die of a MAX232 MAX232 pinout: Red: power, Yellow: charge pump capacitors,Blue: outputs, Green: inputs,Pins 9-12: TTL/CMOS I/O voltages The MAX232 is an integrated circuit first created in 1987 by Maxim Integrated Products that converts signals from a TIA-232 (RS-232) serial port to signals suitable for use in TTL-compatible digital logic circuits.
After revision: MAX232 chip in DIP-16 package upThe die of a MAX232 MAX232 pinout: Red: power, Yellow: charge pump capacitors,Blue: outputs, Green: inputs,Pins 9-12: TTL/CMOS I/O voltages The MAX232 is an integrated circuit by Maxim Integrated Products that converts signals from a TIA-232 (RS-232) serial port to signals suitable for use in TTL-compatible digital logic circuits.