LTC485IN8TR 데이터 시트보기 (PDF) - Linear Technology
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LTC485IN8TR Datasheet PDF : 14 Pages
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LTC485
Test Circuits
A
R
VOD
R
VOC
B
485 F01
Figure 1. Driver DC Test Load
3V
DE
A
DI
B
RDIFF
A
CL1
B
CL2
RO
RE
15pF
485 F03
Figure 3. Driver/Receiver Timing Test Circuit
TEST POINT
S1
RECEIVER
OUTPUT
CRL
15pF
1k
S2
1k
VCC
485 F02
Figure 2. Receiver Timing Test Load
OUTPUT
UNDER TEST
500Ω
CL
S1
VCC
S2
485 F04
Figure 4. Driver Timing Test Load #2
Switching Time Waveforms
3V
DI
0V
B
A
VO
0V
–VO
1.5V
f = 1MHz, tr ≤ 10ns, tf ≤ 10ns
1.5V
tPLH
tPLH
1/2 VO
VO
1/2 VO
10%
tr
tSKEW
80%
VDIFF = V(A) – V(B)
tSKEW
90%
20%
tf
485 F05
Figure 5. Driver Propagation Delays
485fi
6
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