TSS721A is a single chip transceiver developed for Meter-Bus standard (EN1434-3) applications.
●The TSS721A interface circuit adjusts the different potentials between a slave system and the Meter- Bus master. The connection to the bus is polarity independent and supports full galvanic slave isolation with optocouplers.
●The circuit is supplied by the master via the bus. Therefore, this circuit offers no additional load for the slave battery. A power-fail function is integrated.
●The receiver has dynamic level recognition, and the transmitter has a programmable current sink.
●A 3.3-V voltage regulator, with power reserve for a delayed switch off at bus fault, is integrated.
● 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
● Up to 9600 Baud in Half Duplex for UART Protocol
● Slave Power Support
● Supply From Meter-Bus via Output VDD
● Supply From Meter-Bus via Output VDD or From Backup Battery
● Supply From Battery – Meter-Bus Active for Data
●Transmission Only
