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DS75176BT PDF预览

DS75176BT

更新时间: 2024-11-04 22:49:07
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美国国家半导体 - NSC /
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8页 236K
描述
Multipoint RS-485/RS-422 Transceivers

DS75176BT 数据手册

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July 2004  
DS75176B/DS75176BT  
Multipoint RS-485/RS-422 Transceivers  
General Description  
Features  
The DS75176B is a high speed differential TRI-STATE®  
bus/line transceiver designed to meet the requirements of  
EIA standard RS485 with extended common mode range  
(+12V to −7V), for multipoint data transmission. In addition, it  
is compatible with RS-422.  
n Meets EIA standard RS485 for multipoint bus  
transmission and is compatible with RS-422.  
n Small Outline (SO) Package option available for  
minimum board space.  
n 22 ns driver propagation delays.  
The driver and receiver outputs feature TRI-STATE capabil-  
ity, for the driver outputs over the entire common mode  
range of +12V to −7V. Bus contention or fault situations that  
cause excessive power dissipation within the device are  
handled by a thermal shutdown circuit, which forces the  
driver outputs into the high impedance state.  
n Single +5V supply.  
n −7V to +12V bus common mode range permits 7V  
ground difference between devices on the bus.  
n Thermal shutdown protection.  
n High impedance to bus with driver in TRI-STATE or with  
power off, over the entire common mode range allows  
the unused devices on the bus to be powered down.  
n Pin out compatible with DS3695/A and SN75176A/B.  
n Combined impedance of a driver output and receiver  
input is less than one RS485 unit load, allowing up to 32  
transceivers on the bus.  
DC specifications are guaranteed over the 0 to 70˚C tem-  
perature and 4.75V to 5.25V supply voltage range.  
n 70 mV typical receiver hysteresis.  
Connection and Logic Diagram  
00875901  
Top View  
Order Number DS75176BN, DS75176BTN, DS75176BM or DS75176BTM  
See NS Package Number N08E or M08A  
TRI-STATE® is a registered trademark of National Semiconductor Corp.  
© 2004 National Semiconductor Corporation  
DS008759  
www.national.com  

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