TRS3222 Texas instruments

TRS3222

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TRS3222

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Описание

The TRS3222 consists of two line drivers, two line receivers, and a dual charge-pump circuit with ±15-kV 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 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. The device operates at data signaling rates up to 250 kbit/s and a maximum of 30-V/µ s driver output slew rate. The TRS3222 can be placed in the power-down mode by setting PWRDOWN low, which draws only 1 µ A 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 also can be placed in the high-impedance state by settingEN high.

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 Standards
Operates With 3-V to 5.5-V V_CC Supply
Operates up to 250 kbit/s
Two Drivers and Two Receivers
Low Standby Current . . . 1 µ A Typical
External Capacitors . . . 4 × 0.1 µ F
Accepts 5-V Logic Input With 3.3-V Supply
Alternative High-Speed Pin-Compatible Device (1 Mbit/s)
- TRSF3222
APPLICATIONS
- Battery-Powered Systems
- PDAs
- Notebooks
- Laptops
- Palmtop PCs
- Hand-Held Equipment

Drivers per package	2
Receivers per package	2
Logic voltage (min) (V)	3.3
Data rate (max) (MBits)	0.25
Main supply voltage (nom) (V)	3.3, 5
Features	Powerdown
ESD HBM (kV)	15
Rating	Catalog
Operating temperature range (°C)	0 to 70
Vout (typ) (V)	5.4