ISL83488 Intersil Corporation, ISL83488 Datasheet - Page 8

• Manufacturer Part Number: ISL83488
• Description: 3.3V/ Low Power/ High Speed or Slew Rate Limited/ RS-485/RS-422 Transceivers
• Manufacturer: Intersil Corporation

Test Circuits and Waveforms
SIGNAL
GENERATOR
SIGNAL
GENERATOR
V
CC
FIGURE 2C. SINGLE ENDED TEST CIRCUIT
FIGURE 2A. DIFFERENTIAL TEST CIRCUIT
3V
DE
DI
3V
DE
DI
DE
DI
FIGURE 1A. V
D
D
Z
Y
D
FIGURE 2. DRIVER PROPAGATION DELAY AND DIFFERENTIAL TRANSITION TIMES
Z
Y
Y
Z
ISL83483, ISL83485, ISL83488, ISL83490, ISL83491
8
OD
V
OD
OUT
AND V
R
R
C
L
DIFF
L
= 27Ω
V
= 15pF
OC
OM
R
R
= 60Ω
L
L
=
/2
/2
V
FIGURE 1. DC DRIVER TEST CIRCUITS
OH
C
C
V
L
V
L
2
+ V
OM
OC
= 15pF
= 15pF
OL
≈1.5V
DIFF OUT (Y - Z)
V
SKEW = |t
CC
OUT (Y)
OUT (Z)
DI
DE
DI
FIGURE 1B. V
PLH
FIGURE 2B. MEASUREMENT POINTS
D
(Y or Z) - t
t
10%
R
Z
Y
50%
t
t
t
1.5V
PLH
PHL
DD
OD
PHL
WITH COMMON MODE LOAD
50%
50%
(Z or Y)|
90%
V
OD
90%
t
R
t
PHL
t
PLH
1.5V
DD
L
= 60Ω
50%
50%
50%
10%
t
F
375Ω
375Ω
3V
0V
-7V to +12V
+V
-V
V
V
V
V
OH
OL
OH
OL
V
OD
OD
CM