The MAX232 is a dual driver/receiver that includes a capacitive voltage generator to supply EIA/TIA-232-E voltage levels from a single 5-V supply. Each receiver converts EIA/TIA-232-E 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/TIA-232-E levels. The driver, receiver, and voltage-generator functions are available as cells in the Texas Instruments LinASIC library.
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