LTC1334 LINER [Linear Technology], LTC1334 Datasheet - Page 9

• Manufacturer Part Number: LTC1334
• Description: Single 5V RS232/RS485 Multiprotocol Transceiver
• Manufacturer: LINER [Linear Technology]

SWITCHI G WAVEFOR S
Figure 1. RS422/RS485
Driver Test Load
TEST CIRCUITS
Y
Z
V
OD
R
R
LTC1334 • F01
U
Figure 4. RS232 Driver
Swing/Timing Test Circuit
V
OC
D
0V
SEL
Z – Y
D
–V
Y, Z
V
3V
0V
O
Y
Z
O
LTC1334 • F04
C
L
V
O
R
D
W
L
3V
3V
Figure 6. RS485 Driver Propagation Delays
1.5V
Figure 2. RS485 Driver/Receiver
Timing Test Circuit
DE
SEL
10%
t
PLH
50%
Y
Z
f = 1MHz: t
t
r
90%
R
t
SKEW
L
r
10ns: t
1/2 V
V
DIFF
f
C
C
O
L
L
= V(Z) – V(Y)
10ns
B
A
LTC1334 • F02
3V
SEL
R
1.5V
90%
t
15pF
PHL
D
0V
Figure 5. RS232 Receiver
Timing Test Circuit
SEL
t
f
50%
Y, Z
10%
t
V
SKEW
IN
A, B
Figure 3. RS485 Driver Output
Enable/Disable Timing Test Load
LTC1334 • F06
0V
SEL
DR OUT
R
V
OUT
LTC1334
C
500
L
LTC1334 • F05
15pF
LTC1334 • F03
V
CC
S1
S2
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