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LTC1687CS Datasheet(PDF) 7 Page - Linear Technology

Part # LTC1687CS
Description  52Mbps Precision Delay RS485 Fail-Safe Transceivers
PDF  12 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC1687CS Datasheet(HTML) 7 Page - Linear Technology

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7
LTC1686/LTC1687
SWITCHI G TI E WAVEFOR S
Figure 5. Driver Propagation Delays
D
3V
1.5V
t PLH
t r
tSKEW
1/2 VO
90%
10%
0V
Z
Y
VO
–VO
0V
90%
1.5V
tPHL
tSKEW
1/2 VO
f = 1MHz, t r ≤ 3ns, tf ≤ 3ns
10%
tf
VDIFF = V(Y) – V(Z)
1686/87 F05
VO
1.5V
tZL
2.5V
2.5V
tZH
1.5V
tLZ
0.5V
0.5V
tHZ
f = 1MHz, tr ≤ 3ns, tf ≤ 3ns
OUTPUT NORMALLY LOW
OUTPUT NORMALLY HIGH
3V
0V
DE
5V
VOL
VOH
0V
Y, Z
Y, Z
1686/87 F06
Figure 6. Driver Enable and Disable Times
2.5V
tPHL
f = 1MHz, tr ≤ 3ns, tf ≤ 3ns
R
–VOD2
A – B
0V
2.5V
t PLH
OUTPUT
INPUT
VOD2
VOL
VOH
1686/87 F07
Figure 7. Receiver Propagation Delays
1.5V
tZL
2.5V
2.5V
tZH
1.5V
tLZ
0.5V
0.5V
tHZ
f = 1MHz, t r ≤ 3ns, tf ≤ 3ns
OUTPUT NORMALLY LOW
OUTPUT NORMALLY HIGH
3V
0V
RE
5V
0V
R
R
1686/87 F08
Figure 8. Receiver Enable and Disable Times



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