BL15721A Datasheet, PDF (1/11 Pages) SHANGHAI BELLING CO., LTD. – Meter-Bus Transceiver

Features
Meter-Bus Transceiver
BL15721A
Meter-Bus Transceiver (for Slave) Meets Standard EN-1434-3
Adjustable Constant-Current Sink via Resister
Receiver Logic With Dynamic Level Recognition
Module Supply Voltage Switch
3.3V Constant Voltage Source
Remote Powering
Polarity Independent
Power Fail Function
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
SOP16 package
General Description
BL15721A is a single chip transceiver developed for Meter-Bus standard (EN1434-3)
applications.
The BL15721A 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 receiver has dynamic level recognition, and the transmitter has a programmable
current sink.
The circuit is supplied by the master via the bus. Therefore, this circuit offers no additional
load for the slave battery.
The BL15721A integrates a power-fail function. And a 3.3V voltage regulator, with power
reserve for a delayed switch off at bus fault, is integrated.
Order Information
Part Number
BL15721A
Package
SOP16
Packing
Tape & Reel
Tube
http://www.belling.com.cn
- Page 1 of 11 -
Ver1.0