TRSF3222E Texas instruments

TRSF3222E

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TRSF3222E

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Описание

The TRSF3222E 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 TRSF3222E 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 TRSF3222E operates at typical data signaling rates up to 1000 kbit/s and is an improved drop-in replacement for industry-popular 3222 two-driver, two-receiver functions.The TRSF3222E can be placed in the power-down mode by setting the power-down ( PWRDOWN) input low, which draws only 1 µA 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 setting enable ( EN) high.

ESD Protection for RS-232 bus pins
- ±15-kV Human-body model (HBM)
- ±8-kV IEC 61000-4-2, Contact discharge
- ±15-kV IEC 61000-4-2, Air-gap discharge
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 1000 kbit/s
Two drivers and two receivers
Low standby current . . . 1 µA Typ
External capacitors . . . 4 × 0.1 µF
Accepts 5-V logic input with 3.3-V supply

Drivers per package	2
Receivers per package	2
Logic voltage (min) (V)	3.3
Data rate (max) (MBits)	1
Main supply voltage (nom) (V)	3.3, 5
Features	Powerdown
ESD HBM (kV)	15
Rating	Catalog
Operating temperature range (°C)	-40 to 85, 0 to 70
Vout (typ) (V)	5.4