The Max232 device is a dual driver/receiver that includes a capacitive voltage generator to supply eia-232 voltage levels from a single 5-v supply. Each receiver converts eia-232 inputs to 5-v TTL/CMOS levels. These receivers have a typical threshold of 1.3 V and a typical hysteresis of 0.5 V, and can accept +/-30-v inputs. Each driver converts TTL/CMOS input levels into eia-232 levels.
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