资 源 简 介
The SN65C3221 consists of one line driver, one line receiver, and a dual charge-pump circuit with ±15-kV ESD protecTIon pin to pin (serial-port connecTIon pins, including GND). This device 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. This device operates at data signaling rates up to 1 Mbit/s and a driver output slew rate of 24 V/µs to 150 V/µs.
Flexible control options for power management are available when the serial port is inactive. The auto-powerdown feature functions when FORCEON is low and FORCEOFF is high. During this mode of operation, if the device does not sense a valid RS-232 signal on the receiver input, the driver output is disabled.
