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ADM4850 Datasheet(PDF) 12 Page - Analog Devices

Part No. ADM4850
Description  5 V, Slew-Rate Limited, Half-Duplex and Full-Duplex RS-485/RS-422 Transceivers
Download  16 Pages
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Maker  AD [Analog Devices]
Homepage  http://www.analog.com
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ADM4850 Datasheet(HTML) 12 Page - Analog Devices

 
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ADM4850/ADM4851/ADM4852/ADM4853/ADM4854/ADM4855/ADM4856/ADM4857
Rev. D | Page 12 of 16
SWITCHING CHARACTERISTICS
3V
0V
5V
0V
A
B
VOD
tR
tF
tPLH
tPHL
90% POINT
10% POINT
90% POINT
10% POINT
tSKEW = |tPLH – tPHL|
1/2VOD
1.5V
1.5V
Figure 24. Driver Propagation Delay, Rise/Fall Timing
tSKEW = |tPLH – tPHL|
1.5V
1.5V
tPLH
tPHL
RO
VOH
0V
A, B
0V
VOL
Figure 25. Receiver Propagation Delay
A, B
A, B
DE
3V
0V
0V
VOH
VOL
1.5V
tLZ
tZL
1.5V
tHZ
tZH
2.3V
2.3V
VOL + 0.5V
VOH – 0.5V
Figure 26. Driver Enable/Disable Timing
RO
RO
RE
3V
0V
0V
VOH
VOL
1.5V
tLZ
tZL
1.5V
tHZ
tZH
1.5V
1.5V
VOL + 0.5V
VOH – 0.5V
OUTPUT HIGH
OUTPUT LOW
Figure 27. Receiver Enable/Disable Timing


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