UT3222数据手册UTC中文资料规格书

描述 Description

The UTC UT3222 have two receivers and two transmitters, and a dual charge-pump circuit with ±15kV ESD protection pin to pin (serial-port connection pins, including GND). The device meets the requirements of TIA/EIA-232-F and provides the electrical interfacebetween an asynchronous communication controller and the serial-port connector. The charge pump and four small external capacitors allow operation from a single 3V to 5.5V supply. Thedevice operates at data signaling rates up to 250 kbit/s and amaximum of 30V/μS driver output slew rate. The UTC  UT3222 can be placed in the power-down mode by setting  PWRDOWN  low, which draws only 1μA from the power supply. When the device is powered down, the receivers remain active while the drivers are placed in the high-impedance state. Also, during power down, the onboard charge pump is disabled; V+ is lowered to VCC and V− is raised toward GND. Receiver outputs alsocan be placed in the high-impedance state by setting  EN high.

特性 Features

RS-232 Bus-Pin ESD Protection Exceeds±15 kV Using Human-Body Model (HBM)Meets or Exceeds the Requirements of TIA/EIA-232-F and  ITU v.28 StandardsOperates With 3V to 5.5V VCC SupplyOperates Up To 250 kbit/sTwo Drivers and Two ReceiversLow Standby Current 1μA TypicalExternal Capacitors 4×0.1μFAccepts 5V Logic Input With 3.3V Supply