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TSS721A-TSS721ADR
Meter-Bus Transceiver 16-SOIC
13RXI
RIS
GND
BUSL1
RIDD
STC
BUSL2
D PACKAGE
(TOP VIEW) 10
VDD 9 BAT
TSS721A
www.ti.com SLAS222B –APRIL 1999–REVISED NOVEMBER 2010
1FEATURES Meter-Bus Transceiver (for Slave) Meets
Standard EN1434-3 Receiver Logic With Dynamic Level
Recognition Adjustable Constant-Current Sink via Resistor Polarity Independent Power-Fail Function Module Supply Voltage Switch 3.3-V Constant Voltage Source Remote Powering Upto 9600 Baudin Half Duplex for UART
Protocol Slave Power Support Supply From Meter-Bus via Output VDD Supply From Meter-Bus via Output VDDor
From Backup Battery Supply From Battery– Meter-Bus Active for
Data Transmission Only
DESCRIPTIONTSS721Aisa single chip transceiver developedfor Meter-Bus
The TSS721A interface circuit adjusts the different potentials betweena slave system and the Meter- Bus
master. The connectionto the busis polarity independent and supports full galvanic slave isolation with
optocouplers.
The circuitis supplied by the master via the bus. Therefore, this circuit offers no additional load for the slave
