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9 pin D-SUB male connector to the compute

2017-12-22 17:49  
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9 pin D-SUB male connector  to the computer

MAX3232

RX voltage must be limited to 3V (by stabilitron or by using 3 Volt MAX3232) when using cable for SMS-ing. Mobile phone will loose network signal during the data exchange without this.

The MAX3232 device consists of two line drivers, two line receivers, and a dual charge-pump circuit with ±15-kV ESD protection pin to pin (serial-port connection pins, including GND). The device meets the requirements of TIA/EIA-232-F and provides the electrical interface between an asynchronous communication controller and the serial-port connector. The charge pump and four small external capacitors allow operation from a single 3-V to 5.5-V supply. The devices operate at data signaling rates up to 250 kbit/s and a maximum of 30-V/ìs driver output slew rate.