TRS3221 Texas instruments

TRS3221

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TRS3221

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Описание

The TRS3221 device consists of one line driver, one line receiver with dedicated enable pin, 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 one 3-V to 5.5-V supply. The TRS3221 device operates at data signaling rates up to 250 kbps and a maximum of 30-V/µs driver output slew rate. Flexible control options for power management are available when the serial port is inactive. The automatic power-down 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 and the supply current is reduced to 1 µA. The INVALID output notifies the user if an RS-232 signal is present at the receiver input.

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 kbps
One Driver and One Receiver
Low Standby Current: 1-µA Typical
External Capacitors: 4 × 0.1 µF
Accepts 5-V Logic Input With 3.3-V Supply
Alternative High-Speed Pin-Compatible
Device (1 Mbps)
- SNx5C3221
Automatic Power-Down Feature Automatically
Disables Drivers for Power Savings

Drivers per package	1
Receivers per package	1
Logic voltage (min) (V)	3.3
Data rate (max) (MBits)	0.25
Main supply voltage (nom) (V)	3.3, 5
Features	Auto-Powerdown
ESD HBM (kV)	15
Rating	Catalog
Operating temperature range (°C)	-40 to 85
Vout (typ) (V)	5.4