Datasheet

LTC2872
14
2872f
TesT circuiTs
Figure 11. RS232 Receiver Timing Measurements
Figure 12. RS232 Receiver Enable and Disable Times
2872 F11
t
PHLR232
t
SKEWR232
= |t
PLHR232
– t
PHLR232
|
t
PLHR232
t
RR232
90%
1.5V 1.5V
½V
L
10%
t
FR232
90%
0V
–3V
V
L
+3V
½V
L
10%
0V
V
L
RECEIVER
OUTPUT
RECEIVER
OUTPUT
RECEIVER
INPUT
RECEIVER
INPUT
C
L
2872 F12
–3V OR +3V
RXEN
RECEIVER
OUTPUT
GND
OR V
L
C
L
R
L
t
HZR232
t
LZR232
RXEN
RECEIVER
OUTPUT
RECEIVER
OUTPUT
0.5V
t
ZHR232
t
ZLR232
½V
L
½V
L
0.5V
0V
0V
V
L
V
OHR
V
L
½V
L
½V
L
V
OLR