The MAX232 device is a dual driver/receiver that includes a capacitive voltage generator
to supply TIA/EIA-232-F voltage levels from a single 5-V supply. Each receiver converts
TIA/EIA-232-F inputs to 5-V TTL/CMOS levels. These receivers have a typical threshold of 1.3 V, a
typical hysteresis of 0.5 V, and can accept ±30-V inputs. Each driver converts TTL/CMOS input
levels into TIA/EIA-232-F levels.
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