81487EIB 查看數據表（PDF） - Renesas Electronics
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81487EIB Datasheet PDF : 14 Pages
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ISL8487E, ISL81487L, ISL81487E
Test Circuits and Waveforms
VCC DE
DI
Z
D
Y
VOD
R
R
VOC
FIGURE 1. DRIVER VOD AND VOC
DE
VCC
DI
SIGNAL
GENERATOR
Z
D
Y
CL = 100pF
RDIFF
CL = 100pF
DI
OUT (Y)
OUT (Z)
1.5V
tPLH
50%
tPHL
50%
3V
1.5V
0V
tPHL
50%
VOH
VOL
tPLH
50%
VOH
VOL
DIFF OUT (Y - Z)
90%
10%
tR
90%
10%
tF
+VOD
-VOD
SKEW = |tPLH (Y or Z) - tPHL (Z or Y)|
FIGURE 2A. TEST CIRCUIT
FIGURE 2B. MEASUREMENT POINTS
FIGURE 2. DRIVER PROPAGATION DELAY AND DIFFERENTIAL TRANSITION TIMES
DE
DI
SIGNAL
GENERATOR
Z
D
Y
CL
500
VCC
SW GND
DE
NOTE 7
1.5V
3V
1.5V
0V
(SHDN) for ISL8487E and ISL81487L only.
PARAMETER OUTPUT RE
DI
tHZ
tLZ
tZH
tZL
tZH(SHDN)
tZL(SHDN)
Y/Z
X
1/0
Y/Z
X
0/1
Y/Z 0 (Note 5) 1/0
Y/Z 0 (Note 5) 0/1
Y/Z 1 (Note 7) 1/0
Y/Z 1 (Note 7) 0/1
SW
GND
VCC
GND
VCC
GND
VCC
CL (pF)
15
15
100
100
100
100
tZH, tZH(SHDN)
NOTE 7
OUT (Y, Z)
tZL, tZL(SHDN)
NOTE 7
OUT (Y, Z)
tHZ
OUTPUT HIGH
2.3V
VOH - 0.5V VOH
0V
tLZ
2.3V
OUTPUT LOW
VCC
VOL + 0.5V VOL
FIGURE 3A. TEST CIRCUIT
FIGURE 3B. MEASUREMENT POINTS
FIGURE 3. DRIVER ENABLE AND DISABLE TIMES
FN6051 Rev.7.00
February 27, 2006
Page 7 of 14
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