Features

General Description

In systems where a master controller controls a number of individual interconnected subsystems such

as found in smoke detector systems, water metering systems, solar energy system etc., the cost of the

lengthy interconnecting cabling can be a major factor. By sending data along the power supply lines,

the interconnecting cables can be reduced to a simple two line type, thus greatly reducing both cable

and installation costs.

With a the addition of a few external components, this power line data transceiver device contains all

the internal components required to provide users with a system for power line data transmission and

reception. Data is modulated onto the power line by the simple reduction of the power line voltage for

a specific period of time. Power supply voltage changes can be initiated by the master controller for

data reception or initiated by the HT71D0x devices for data transmission. An internal voltage

regulator within the device ensures that a constant voltage power supply is provided to the

interconnected subsystem units while an internal voltage detector monitors the power line voltage

level.

Selection Guide

Part No.

LDO

Voltage

Detect

Voltage

Package

HT71D02

3.3V

9.0V

8SOP

HT71D04

5.0V

9.0V

8SOP

HT71D02/HT71D04

Power Line Data Transceiver

Rev. 1.00

1

June 30, 2010