LTC2852_15 Datasheet, PDF (6/18 Pages) Linear Technology – 3.3V 20Mbps RS485/RS422 Transceivers

LTC2850/LTC2851/LTC2852
Test Circuits
Y
GND _DI
+
OR
V_CC
DRIVER
V_–OD
Z
R
R₊
V_–OC
285012 F01
Figure 1. Driver DC Characteristics
Y
GND _DI
OR
DRIVER
V_CC
Z
I_OSD
+
–
–7V TO 12V
285012 F02
Figure 2. Driver Output Short-Circuit Current
I_IN
A OR B
V_IN ^+–
RECEIVER
B OR A
285012 F03
R_IN
=
V_IN
I_IN
Figure 3. Receiver Input Current and Input Resistance
Y
DI
DRIVER
Z
C_L
R_DIFF
V_CC
DI
0V
Y, Z VO
t_PLHD
1/2 V_O
t_SKEWD
C_L
285012 F04a
(Y-Z)
90%
10% ⁰
t_RD
Figure 4. Driver Timing Measurement
t_PHLD
90%
0 _10%
285012 F04b
t_FD
285012fd