+3V
DRIVER INPUT
0V
TX
2
DRIVER
OUTPUT TX
1
DIFFERENTIAL V
O
+
OUTPUT 0V
TX
1
– TX
2
V
O
–
Figure 3. Driver Propagation Delays
f = 1MHz; t
R
< 10ns; t
F
< 10ns
1.5V
t
PLH
V
O
1/2V
O
t
SKEW
t
PHL
1/2V
O
t
SKEW
1.5V
t
R
t
F
+3V
TXEN
0V
5V
TX
x
V
OL
V
OH
TX
x
0V
f = 1MHz; t
R
< 10ns; t
F
< 10ns
1.5V
t
ZL
2.3V
Output normally LOW
1.5V
t
LZ
0.5V
0.5V
t
HZ
2.3V
t
ZH
Output normally HIGH
Figure 4. Driver Enable and Disable Times
V
0D2
+
RI
1
–RI
2
V
0D2
–
V
OH
RX
V
OL
t
PHL
0V
INPUT
0V
1.5V
OUTPUT
1.5V
t
PLH
f = 1MHz; t
R
< 10ns; t
F
< 10ns
Figure 5. Receiver Propagation Delays
TGoddard/SP333/9617R0
SP333 RS-232/AppleTalk Programmable Transceiver
© Copyright 2000 Sipex Corporation
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