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ISL8490 Datasheet(PDF) 8 Page - Intersil Corporation

Part # ISL8490
Description  5V, Low Power, High Speed or Slew Rate Limited, RS-485/RS-422 Transceivers
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Manufacturer  INTERSIL [Intersil Corporation]
Direct Link  http://www.intersil.com/cda/home
Logo INTERSIL - Intersil Corporation

ISL8490 Datasheet(HTML) 8 Page - Intersil Corporation

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8
FN6046.8
February 28, 2006
FIGURE 2A. TEST CIRCUIT
FIGURE 2B. MEASUREMENT POINTS
FIGURE 2. DRIVER PROPAGATION DELAY AND DIFFERENTIAL TRANSITION TIMES
FIGURE 3A. TEST CIRCUIT
FIGURE 3B. MEASUREMENT POINTS
FIGURE 3. DRIVER ENABLE AND DISABLE TIMES (EXCLUDING ISL8488, ISL8490)
FIGURE 4A. TEST CIRCUIT
FIGURE 4B. MEASUREMENT POINTS
FIGURE 4. RECEIVER PROPAGATION DELAY
Test Circuits and Waveforms (Continued)
D
DE
DI
VCC
SIGNAL
GENERATOR
CL = 100pF
RDIFF
Z
Y
CL = 100pF
OUT (Y)
3V
0V
tPLH
1.5V
1.5V
VOH
VOL
50%
50%
tPHL
OUT (Z)
tPHL
VOH
VOL
50%
50%
tPLH
DIFF OUT (Y - Z)
tR
+VOD
-VOD
90%
90%
tF
10%
10%
DI
SKEW = |tPLH (Y or Z) - tPHL (Z or Y)|
D
DE
DI
CL
500
Z
Y
VCC
GND
SW
(SHDN) for ISL8483 only
PARAMETER OUTPUT
RE
DI
SW
CL (pF)
tHZ
Y/Z
X
1/0
GND
15
tLZ
Y/Z
X
0/1
VCC
15
tZH
Y/Z
0 (Note 5)
1/0
GND
100
tZL
Y/Z
0 (Note 5)
0/1
VCC
100
tZH(SHDN)
Y/Z
1 (Note 8)
1/0
GND
100
tZL(SHDN)
Y/Z
1 (Note 8)
0/1
VCC
100
SIGNAL
GENERATOR
OUT (Y, Z)
3V
0V
1.5V
1.5V
VOH
0V
2.3V
VOH - 0.5V
tHZ
OUT (Y, Z)
VCC
VOL
2.3V
VOL + 0.5V
tLZ
DE
OUTPUT HIGH
OUTPUT LOW
tZL, tZL(SHDN)
tZH, tZH(SHDN)
NOTE 7
NOTE 7
NOTE 7
SIGNAL
GENERATOR
R
RO
RE
A
B
+1.5V
15pF
RO
3V
0V
tPLH
1.5V
1.5V
VCC
0V
50%
50%
tPHL
A
ISL8483, ISL8485, ISL8488, ISL8489, ISL8490, ISL8491


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