欧洲流行的总线通讯方式
1星 需积分: 9 23 浏览量
2009-02-11
14:13:35
上传
评论
收藏 137KB PDF 举报 
TSS721A
METER-BUS TRANSCEIVER
SLAS 222 - April 1999
1
ÿþýüûúùøý÷ö üõùõö ôóòñðïîíôñóö ôìö ëêððéóíö îìö ñòö èêçæôëîíôñóö åîíéä
ÿðñåêëíìöëñóòôðïöíñöìèéëôòôëîíôñóìöèéðöíéöíéðïìöñòöùéîìö øóìíðêïéóíì
ìíîóåîðåöîððîóí äöÿðñåêëíôñóöèðñëéììôó öåñéìöóñíöóéëéììîðôæ öôóëæêåé
íéìíôó öñòöîææöèîðîïéíéðìä
Copyright © 1999, Texas Instruments Incorporated
• 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 back up battery
- supply from battery – Meter-Bus active
for data transmission only
D PACKAGE
(TOP VIEW)
BUSL2
STC
VB
RIDD
PF
SC
TXI
TX
BUSL1
GND
RIS
RXI
RX
VDD
VS
BAT
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 opto-couplers.
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 a programmable current sink.
A 3.3-V voltage regulator, with power reserve for a delayed switch off at bus fault, is integrated.
剩余13页未读，继续阅读
资源评论
lfah0012012-11-05这是坑人的吧，拿个英文说明书，随便发过来，就要10分，一点用都没有，强烈要求赔钱。
