ISL8487E, ISL81487L, ISL81487E
Test Circuits and Waveforms
V
CC
DE
DI
Z
D
Y
V
OD
R
R
V
OC
FIGURE 1. DRIVER V
OD
AND V
OC
3V
DI
1.5V
1.5V
0V
t
PLH
OUT (Y)
50%
t
PHL
V
OH
DE
DI
D
Y
SIGNAL
GENERATOR
90%
10%
t
R
SKEW = |t
PLH
(Y or Z) - t
PHL
(Z or Y)|
90%
10%
t
F
Z
R
DIFF
C
L
= 100pF
OUT (Z)
C
L
= 100pF
50%
V
OL
t
PHL
50%
t
PLH
V
OH
50%
V
OL
V
CC
+V
OD
-V
OD
DIFF OUT (Y - Z)
FIGURE 2A. TEST CIRCUIT
FIGURE 2B. MEASUREMENT POINTS
FIGURE 2. DRIVER PROPAGATION DELAY AND DIFFERENTIAL TRANSITION TIMES
DE
DI
SIGNAL
GENERATOR
Z
D
Y
C
L
SW
500Ω
V
CC
GND
DE
NOTE 7
1.5V
1.5V
0V
t
HZ
V
OH
- 0.5V
2.3V
0V
t
ZL
, t
ZL(SHDN)
NOTE 7
OUT (Y, Z)
2.3V
OUTPUT LOW
t
LZ
V
CC
V
OL
+ 0.5V V
OL
V
OH
3V
t
ZH
, t
ZH(SHDN)
(SHDN) for ISL8487E and ISL81487L only.
NOTE 7
OUTPUT HIGH
PARAMETER OUTPUT
t
HZ
t
LZ
t
ZH
t
ZL
t
ZH(SHDN)
t
ZL(SHDN)
Y/Z
Y/Z
Y/Z
Y/Z
Y/Z
Y/Z
RE
X
X
0 (Note 5)
0 (Note 5)
1 (Note 7)
1 (Note 7)
DI
1/0
0/1
1/0
0/1
1/0
0/1
SW
GND
V
CC
GND
V
CC
GND
V
CC
C
L
(pF)
15
15
100
100
100
100
OUT (Y, Z)
FIGURE 3A. TEST CIRCUIT
FIGURE 3B. MEASUREMENT POINTS
FIGURE 3. DRIVER ENABLE AND DISABLE TIMES
7
FN6051.6
INTERSIL [ INTERSIL CORPORATION ]
