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DS3696T

更新时间： 2024-10-31 22:49:07
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美国国家半导体 - NSC /
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10页 251K
描述
Multipoint RS485/RS422 Transceivers/Repeaters

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DS3696T 数据手册

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March 1996  
DS3695/DS3695T/DS3696/DS3696T/DS3697/DS3698  
Multipoint RS485/RS422 Transceivers/Repeaters  
General Description  
The DS3695, DS3696, DS3697 and DS3698 are high speed  
differential TRI-STATE bus/line transceivers/repeaters  
É
designed to meet the requirements of EIA standard RS485  
Features  
Y
Meets EIA standard RS485 for multipoint bus transmis-  
sion and is compatible with RS-422  
Y
15 ns driver propagation delays with 2 ns skew (typical)  
a
b
g
7V to 12V bus common mode range permits 7V  
ground difference between devices on the bus  
a
b
Y
with extended common mode range ( 12V to 7V), for  
multipoint data transmission.  
Single 5V supply  
a
Y
The driver and receiver outputs feature TRI-STATE capabili-  
ty. The driver outputs remain in TRI-STATE over the entire  
Y
Y
Thermal shutdown protection  
a
b
7V. Bus faults that  
common mode range of  
12V to  
High impedance to bus with driver in TRI-STATE or  
with power off, over the entire common mode range al-  
lows the unused devices on the bus to be powered  
down  
cause excessive power dissipation within the device trigger  
a thermal shutdown circuit, which forces the driver outputs  
into the high impedance state. The DS3696 and DS3698  
provide an output pin TS (thermal shutdown) which reports  
the occurrence of the thermal shutdown of the device. This  
is an ‘‘open collector’’ pin with an internal 10 kX pull-up  
resistor. This allows the line fault outputs of several devices  
to be wire OR-ed.  
Y
Y
Combined impedance of a driver output and receiver in-  
put is less than one RS485 unit load, allowing up to 32  
transceivers on the bus  
70 mV typical receiver hysteresis  
Both AC and DC specifications are guaranteed over the 0 C  
§
to 70 C temperature and 4.75V to 5.25V supply voltage  
§
range.  
Connection and Logic Diagrams  
TL/F/10408–1  
TL/F/10408–12  
Top View  
Top View  
TL/F/10408–13  
TL/F/10408–14  
Top View  
Top View  
Order Number DS3695N, DS3696N, DS3697N, DS3698N,  
DS3695TN, DS3696TN, DS3695TJ or DS3696TJ  
See NS Package Number J08A or N08E  
Note: TS pin was LF (Line Fault) in previous datasheets and reports the occurrence of a thermal shutdown of the device.  
TRI-STATEÉ is a registered trademark of National Semiconductor Corporation.  
C
1996 National Semiconductor Corporation  
TL/F/10408  
RRD-B30M76/Printed in U. S. A.  
http://www.national.com  
1234567...10

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