LTC1334 View Datasheet(PDF) - Linear Technology
Part Name
Description
Manufacturer
LTC1334 Datasheet PDF : 16 Pages
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TEST CIRCUITS
Z
R
VOD
R VOC
Y
LTC1334 • F01
Figure 1. RS422/RS485
Driver Test Load
LTC1334
3V
SEL Z
D
RL
DE Y
3V
3V
CL
B
SEL
R
CL
A
15pF
LTC1334 • F02
Figure 2. RS485 Driver/Receiver
Timing Test Circuit
DR OUT
VCC
S1
500Ω
CL
S2
LTC1334 • F03
Figure 3. RS485 Driver Output
Enable/Disable Timing Test Load
0V
SEL
D
Y, Z
CL
RL
LTC1334 • F04
Figure 4. RS232 Driver
Swing/Timing Test Circuit
U
W
SWITCHI G WAVEFOR S
0V
SEL
D
Y, Z
0V
SEL
A, B
R
VIN
VOUT
Figure 5. RS232 Receiver
Timing Test Circuit
15pF
LTC1334 • F05
3V
D
0V
VO
Z–Y
–VO
Y
Z
1.5V
f = 1MHz: tr ≤ 10ns: tf ≤ 10ns
1.5V
tPLH
90%
50%
10%
tr
VDIFF = V(Z) – V(Y)
1/2 VO
tPHL
90%
50%
10%
tf
VO
tSKEW
tSKEW LTC1334 • F06
Figure 6. RS485 Driver Propagation Delays
9
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