ISL8483 Intersil Corporation, ISL8483 Datasheet - Page 8

• Manufacturer Part Number: ISL8483
• Description: 5V/ Low Power/ High Speed or Slew Rate Limited/ RS-485/RS-422 Transceivers
• Manufacturer: Intersil Corporation

Test Circuits and Waveforms
(SHDN) for ISL8483 only
SIGNAL
GENERATOR
PARAMETER OUTPUT
t
t
ZH(SHDN)
ZL(SHDN)
SIGNAL
GENERATOR
t
t
t
t
HZ
ZH
LZ
ZL
SIGNAL
GENERATOR
V
CC
+1.5V
DE
DI
FIGURE 2A. TEST CIRCUIT
FIGURE 3A. TEST CIRCUIT
FIGURE 4A. TEST CIRCUIT
DE
DI
Y/Z
Y/Z
Y/Z
Y/Z
Y/Z
Y/Z
B
A
D
RE
FIGURE 2. DRIVER PROPAGATION DELAY AND DIFFERENTIAL TRANSITION TIMES
0 (Note 5)
0 (Note 5)
1 (Note 8)
1 (Note 8)
D
FIGURE 3. DRIVER ENABLE AND DISABLE TIMES (EXCLUDING ISL8488, ISL8490)
ISL8483, ISL8485, ISL8488, ISL8489, ISL8490, ISL8491
Y
Z
RE
X
X
R
8
Y
Z
RO
C
L
R
1/0
0/1
1/0
0/1
1/0
0/1
DI
DIFF
(Continued)
500Ω
15pF
FIGURE 4. RECEIVER PROPAGATION DELAY
GND
GND
GND
V
V
V
SW
C
C
CC
CC
CC
L
L
= 100pF
= 100pF
SW
C
L
100
100
100
100
GND
15
15
V
(pF)
CC
SKEW = |t
DIFF OUT (Y - Z)
OUT (Y)
OUT (Z)
OUT (Y, Z)
OUT (Y, Z)
t
t
ZH
RO
ZL
DI
A
NOTE 7
NOTE 7
DE
, t
, t
ZH(SHDN)
ZL(SHDN)
PLH
FIGURE 2B. MEASUREMENT POINTS
NOTE 7
FIGURE 3B. MEASUREMENT POINTS
FIGURE 4B. MEASUREMENT POINTS
(Y or Z) - t
t
10%
R
90%
t
t
t
1.5V
PLH
1.5V
PLH
PHL
PHL
1.5V
(Z or Y)|
OUTPUT HIGH
50%
50%
50%
2.3V
2.3V
OUTPUT LOW
t
t
t
PHL
PHL
1.5V
1.5V
PLH
t
t
HZ
LZ
1.5V
90%
50%
50%
50%
V
V
10%
OH
OL
t
F
+ 0.5V
- 0.5V
3V
0V
3V
0V
3V
0V
+V
-V
V
V
V
V
V
0V
CC
OH
OL
OH
OL
V
V
V
OD
OD
0V
OH
CC
OL