ltc2871fe Linear Technology Corporation, ltc2871fe Datasheet - Page 16

• Manufacturer Part Number: ltc2871fe
• Description: Ltc2870/ltc2871 - Rs232/rs485 Multiprotocol Transceivers With Integrated Termination
• Manufacturer: Linear Technology Corporation

TEST CIRCUITS
LTC2870/LTC2871
16
–3V OR +3V
RECEIVER
INPUT
RXEN/RX232
RECEIVER
OUTPUT
RECEIVER
OUTPUT
Figure 12. RS232 Receiver Enable and Disable Times
C
L
Figure 11. RS232 Receiver Timing Measurements
C
L
R
L
GND
OR V
L
RECEIVER
RECEIVER
OUTPUT
INPUT
RECEIVER
RECEIVER
OUTPUT
OUTPUT
RX232
RXEN/
1.5V
t
PHLR232
t
90%
ZHR232
t
½V
ZLR232
10%
L
t
SKEWR232
½V
½V
½V
L
L
L
t
FR232
= |t
PLHR232
– t
1.5V
PHLR232
t
½V
t
t
HZR232
LZR232
PLHR232
½V
|
L
L
10%
0.5V
0.5V
90%
t
RR232
28701 F11
+3V
0V
–3V
V
28701 F12
V
V
V
0V
0V
V
L
L
OHR
OLR
L
28701f