TSS721A中文资料单芯片仪表总线收发器数据手册TI规格书

描述 Description

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.

特性 Features

• 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

简介

TSS721A属于集成电路（IC）的驱动器接收器收发器。由TI制造生产的TSS721A驱动器，接收器，收发器该系列产品的主要功能是提供必需的硬件资源，以通过延长电缆或印制线进行通信。确切的功能会因所采用的通信协议而异，可能包括诸如瞬态抑制之类的功能，这些功能对于通信用途可能并非绝对必要，但对于可能的使用环境却是明智之选。