TSS521 Meter-Bus Transceiver | TI.com

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Meter-Bus Transceiver

Meter-Bus Transceiver - TSS521


The TSS521 is a single-chip transceiver developed for Meter-Bus standard (EN1434-3) applications.

The TSS521 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 through 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
  • Constant-Current Sink Adjustable By Resistor
  • Polarity Independent
  • Power-Fail Function
  • Module Supply Voltage Switch
  • 3.3-V Constant Voltage Source
  • Up to 9600 Baud in Half Duplex for UART Protocol
  • Slave Power Support
    • Supply From Meter-Bus by Output VDD
    • Supply From Meter-Bus by Output VDD or From Backup Battery
    • Supply From Battery – Meter-Bus Active for Data Transmission Only


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Part number Order Features ADC: channels (#) Comparator channels (#) Package Group Approx. price (US$) Bootloader (BSL) Operating temperature range (C) Package size: mm2:W x L (PKG) Rating
TSS521 Order now     0     0     SOIC | 16     0.97 | 1ku     UART     -25 to 85     16SOIC: 59 mm2: 6 x 9.9 (SOIC | 16)     Catalog