HT0740

Features

±400V input to output isolation

Low input logic current, 500µA max

No external voltage supply required

Floating isolated output drivers

5.0V logic compatible

Applications

Telecommunications

Modems

Solid state relays

High side switches

High end audio switches

Avionics

ATE

►

►

►

►

►

►

►

►

►

►

►

►

General Description

The Supertex HT0740 is a single channel, high voltage, low

input current, isolated driver utilizing Supertex’s proprietary

MOSFETs, configured as high side switches, up to 400V.

The HT0740 generates an independent DC isolated voltage

across the pair of outputs when the logic input is at a logic

high. The HT0740 does not require any external power

supplies. The internal supply voltage is supplied from the

logic input when it is in the high state.

Block Diagram

High Voltage, Isolated MOSFET Driver

Logic &

Internal

Clock

VOUT

+

–

4

3

1

7

VIN

GND

Isolation

Barrier

Driver

10R

R

R