ISL8488E 查看數據表（PDF） - Intersil
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ISL8488E Datasheet PDF : 13 Pages
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ISL8488E, ISL8489E, ISL8490E, ISL8491E
Test Circuits and Waveforms (Continued)
DE
DI
SIGNAL
GENERATOR
Z
D
Y
CL
500Ω
VCC
SW GND
PARAMETER OUTPUT RE
tHZ
Y/Z
X
tLZ
Y/Z
X
tZH
Y/Z
X
tZL
Y/Z
X
DI
SW CL (pF)
1/0 GND
15
0/1
VCC
15
1/0 GND 100
0/1
VCC
100
DE
tZH
OUT (Y, Z)
tZL
OUT (Y, Z)
1.5V
3V
1.5V
0V
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 (EXCLUDING ISL8488E, ISL8490E)
+1.5V
RE
B
A
RO
R
15pF
SIGNAL
GENERATOR
3V
A
1.5V
1.5V
0V
tPLH
tPHL
VCC
RO
50%
50%
0V
FIGURE 4A. TEST CIRCUIT
FIGURE 4B. MEASUREMENT POINTS
FIGURE 4. RECEIVER PROPAGATION DELAY
SIGNAL
GENERATOR
RE
B
A
RO
R
1kΩ
VCC
SW GND
15pF
PARAMETER
tHZ
tLZ
tZH
tZL
DE
A
SW
X
+1.5V
GND
X
-1.5V
VCC
X
+1.5V
GND
X
-1.5V
VCC
RE
tZH
RO
tZL
RO
1.5V
3V
1.5V
0V
tHZ
OUTPUT HIGH
1.5V
VOH - 0.5V VOH
0V
tLZ
1.5V
OUTPUT LOW
VCC
VOL + 0.5VVOL
FIGURE 5A. TEST CIRCUIT
FIGURE 5B. MEASUREMENT POINTS
FIGURE 5. RECEIVER ENABLE AND DISABLE TIMES (EXCLUDING ISL8488E, ISL8490E)
7
FN6073.4
July 26, 2007
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