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LTC1334CSW датащи(PDF) 9 Page - Linear Technology

номер детали LTC1334CSW
подробное описание детали  Single 5V RS232/RS485 Multiprotocol Transceiver
PDF  16 Pages
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производитель  LINER [Linear Technology]
домашняя страница  http://www.linear.com
Logo LINER - Linear Technology

LTC1334CSW датащи(HTML) 9 Page - Linear Technology

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LTC1334
TEST CIRCUITS
Figure 2. RS485 Driver/Receiver
Timing Test Circuit
Figure 1. RS422/RS485
Driver Test Load
R
R
VOD
Y
Z
LTC1334 • F01
VOC
RL
CL
LTC1334 • F02
Y
3V
3V
SEL
DE
Z
CL
A
SEL
3V
R
B
15pF
D
DR OUT
CL
500
Ω
S2
LTC1334 • F03
VCC
S1
Figure 4. RS232 Driver
Swing/Timing Test Circuit
RL
LTC1334 • F04
Y, Z
0V
SEL
D
CL
Figure 5. RS232 Receiver
Timing Test Circuit
SWITCHI G WAVEFOR S
Figure 3. RS485 Driver Output
Enable/Disable Timing Test Load
1.5V
3V
0V
D
f = 1MHz: tr ≤ 10ns: tf ≤ 10ns
1.5V
Z – Y
–VO
VO
tSKEW
1/2 VO
LTC1334 • F06
tPLH
tr
90%
50%
10%
tPHL
tf
90%
50%
10%
VO
tSKEW
VDIFF = V(Z) – V(Y)
Z
Y
Figure 6. RS485 Driver Propagation Delays
LTC1334 • F05
15pF
Y, Z
0V
SEL
D
R
0V
SEL
A, B
VIN
VOUT



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