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LTC486 датащи(PDF) 5 Page - Linear Technology

номер детали LTC486
подробное описание детали  Ultralow Power RS485 Transceiver with Shutdown
PDF  8 Pages
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производитель  LINER [Linear Technology]
домашняя страница  http://www.linear.com
Logo LINER - Linear Technology

LTC486 датащи(HTML) 5 Page - Linear Technology

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LTC1481
1481fa
Figure 6. Driver Enable and Disable Times
1.5V
2.3V
2.3V
tZH(SHDN), tZH
tZL(SHDN), tZL
1.5V
tLZ
0.5V
0.5V
tHZ
OUTPUT NORMALLY LOW
OUTPUT NORMALLY HIGH
3V
0V
DE
5V
VOL
VOH
0V
A, B
A, B
LTC1481 • F06
f = 1MHz, tr ≤ 10ns, tf ≤ 10ns
Figure 5. Driver Propagation Delays
DI
3V
1.5V
tPLH
tr
tSKEW
1/2 VO
VO
f = 1MHz, tr ≤ 10ns, tf ≤ 10ns
90%
10%
0V
B
A
VO
–VO
0V
90%
1.5V
tPHL
tSKEW
1/2 VO
10%
tf
VDIFF = V(A) – V(B)
LTC1481 • F05
OUTPUT
UNDER TEST
CL
S1
S2
VCC
500
Ω
LTC1481 • F04
3V
DE
A
B
DI
RDIFF
CL1
CL2
RO
15pF
A
B
RE
LTC1481 • F03
VOD
A
B
R
R
VOC
LTC1481 • F01
RECEIVER
OUTPUT
CRL
1k
S1
S2
TEST POINT
VCC
1k
LTC1481 • F02
Figure 2. Receiver Timing Test Load
Figure 4. Driver Timing Test Load
Figure 1. Driver DC Test Load
Figure 3. Driver/Receiver Timing Test Circuit
TEST CIRCUITS
SWITCHI G TI E WAVEFOR S



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