isl81334 Intersil Corporation, isl81334 Datasheet - Page 11

• Manufacturer Part Number: isl81334
• Description: ?15kv Esd Protected, 5v, Two Port, Dual Protocol Rs-232/rs-485 Transceivers
• Manufacturer: Intersil Corporation

Test Circuits and Waveforms
SIGNAL
GENERATOR
V
CC
DE
D
FIGURE 2A. TEST CIRCUIT
Y
FIGURE 2. RS-485 DRIVER PROPAGATION DELAY AND DIFFERENTIAL TRANSITION TIMES
D
Y
Z
11
V
CC
R
FIGURE 1. RS-485 DRIVER V
DIFF
DE
D
Y
C
C
L
L
= 100pF
= 100pF
D
ISL81334, ISL41334
Y
Z
R
D
OD
AND V
V
OD
SKEW = |t
DIFF OUT (Z - Y)
OC
OUT (Z)
OUT (Y)
D
Y
TEST CIRCUIT
R
R
PLH
FIGURE 2B. MEASUREMENT POINTS
(Y or Z) - t
V
t
10%
R
OC
90%
t
t
t
DLH
1.5V
PLH
PHL
PHL
(Z or Y)|
50%
50%
0V
t
t
t
PHL
0V
PLH
DHL
1.5V
90%
50%
50%
10%
November 21, 2007
t
F
3V
0V
+V
-V
FN6202.3
V
V
V
V
OH
OH
OL
OL
OD
OD