The MAX232 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. The package is PDIP-16.

Features:

• Package PDIP-16 pin
• Operates From a Single 5-V Power Supply
• With 1.0uF Charge-Pump Capacitors
• Operates Up To 120 kbit/s
• Two Drivers and Two Receivers
• ±30-V Input Levels
• Low Supply Current . . . 8 mA Typical
• ESD Protection Exceeds JESD 22
• − 2000-V Human-Body Model (A114-A)

Datasheet:

http://www.ti.com/lit/ds/symlink/max232.pdf