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ISL8485ECBZ View Datasheet(PDF) - Intersil

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Description
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ISL8485ECBZ Datasheet PDF : 14 Pages
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ISL8483E, ISL8485E
Test Circuits and Waveforms (Continued)
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
FIGURE 2A. TEST CIRCUIT
SKEW = |tPLH (Y or Z) - tPHL (Z or Y)|
FIGURE 2B. MEASUREMENT POINTS
FIGURE 2. DRIVER PROPAGATION DELAY AND DIFFERENTIAL TRANSITION TIMES
+VOD
-VOD
DE
DI
SIGNAL
GENERATOR
Z
D
Y
CL
500Ω
VCC
SW GND
(SHDN) FOR ISL8483E ONLY
PARAMETER OUTPUT RE
tHZ
Y/Z
X
tLZ
Y/Z
X
DI
1/0
0/1
SW
GND
VCC
CL (pF)
15
15
DE
NOTE 7
tZH, tZH(SHDN)
NOTE 7
OUT (Y, Z)
1.5V
3V
1.5V
0V
tHZ
OUTPUT HIGH
2.3V
VOH - 0.5V VOH
0V
tZH
tZL
tZH(SHDN)
tZL(SHDN)
Y/Z 0 (Note 5) 1 / 0 GND 100
Y/Z 0 (Note 5) 0 / 1 VCC
100
Y/Z 1 (Note 8) 1 / 0 GND 100
Y/Z 1 (Note 8) 0 / 1 VCC
100
FIGURE 3A. TEST CIRCUIT
tZL, tZL(SHDN)
NOTE 7
OUT (Y, Z)
tLZ
2.3V
OUTPUT LOW
VCC
VOL + 0.5V VOL
FIGURE 3B. MEASUREMENT POINTS
FIGURE 3. DRIVER ENABLE AND DISABLE TIMES
+1.5V
RE
B
A
RO
R
15pF
3V
A
1.5V
1.5V
0V
SIGNAL
GENERATOR
tPLH
tPHL
VCC
RO
50%
50%
0V
FIGURE 4A. TEST CIRCUIT
FIGURE 4B. MEASUREMENT POINTS
FIGURE 4. RECEIVER PROPAGATION DELAY
7
FN6048.9
September 9, 2008
 

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