Summary
The RS232 to TTL Serial Port Converter is a board with the MAX3232 transceiver integrated circuit (IC), which facilitates serial communication between TTL and RS232 ports by providing the necessary electrical signal conversion. These boards usually have a DB9 connector soldered at one end, and four header pins with jumper cables at the other end. The jumper cables enable the user to connect the wires to a breadboard or a microcontroller project board, whilst the DB9 connects directly to a COM port of a computer.
The MAX3232 IC, which comes in a 16 pin narrow SO package. It requires between 3.0 V to 5.5 V to operate, and has two receivers and two transmitters. It has a maximum guaranteed data rate of 120 kbps, and the circuitry requires four 0.1µF charge-pump support capacitors. It is also pin compatible with the famous MAX232 IC.
These boards connect to systems with a UART; hence, they work with ATMEL and PIC microcontrollers.
Specification
Communication Chip: MAX3232
Working Voltage: 3.3V - 5V
Port: DB9 Female (RS-232)
Interface: TXD, RXD, GND, VCC
Power Supply: External
Support: 8051, PIC, AVR and other such microcontrollers (TTL)
Dimensions: 33mm*32mm*14mm
