ISL81487L Intersil Corporation, ISL81487L Datasheet - Page 7

• Manufacturer Part Number: ISL81487L
• Description: 15kV ESD Protected/ 1/8 Unit Load/ 5V/ Low Power/ High Speed or Slew Rate Limited/ RS-485/RS-422 Transceivers
• Manufacturer: Intersil Corporation

Test Circuits and Waveforms
(SHDN) for ISL8487E and ISL81487L only.
SIGNAL
GENERATOR
PARAMETER OUTPUT
t
t
ZH(SHDN)
ZL(SHDN)
SIGNAL
GENERATOR
t
t
t
t
HZ
ZH
LZ
ZL
V
CC
DE
DI
FIGURE 2A. TEST CIRCUIT
FIGURE 3A. TEST CIRCUIT
DE
DI
Y/Z
Y/Z
Y/Z
Y/Z
Y/Z
Y/Z
D
FIGURE 2. DRIVER PROPAGATION DELAY AND DIFFERENTIAL TRANSITION TIMES
0 (Note 5)
0 (Note 5)
1 (Note 7)
1 (Note 7)
D
Y
Z
RE
X
X
7
Y
Z
C
L
R
1/0
0/1
1/0
0/1
1/0
0/1
V
DI
DIFF
CC
FIGURE 3. DRIVER ENABLE AND DISABLE TIMES
ISL8487E, ISL81487L, ISL81487E
500Ω
DE
DI
GND
GND
GND
V
V
V
SW
C
CC
CC
CC
C
L
L
FIGURE 1. DRIVER V
= 100pF
SW
= 100pF
D
C
L
100
100
100
100
Y
Z
GND
15
15
V
(pF)
CC
V
OD
OD
DIFF OUT (Y - Z)
SKEW = |t
OUT (Y, Z)
OUT (Y, Z)
t
AND V
t
OUT (Y)
OUT (Z)
ZH
ZL
R
R
DI
DE
, t
NOTE 7
NOTE 7
, t
ZH(SHDN)
ZL(SHDN)
OC
NOTE 7
PLH
V
FIGURE 2B. MEASUREMENT POINTS
FIGURE 3B. MEASUREMENT POINTS
OC
(Y or Z) - t
t
10%
R
90%
t
t
1.5V
PLH
PHL
1.5V
PHL
OUTPUT HIGH
(Z or Y)|
50%
2.3V
50%
2.3V
OUTPUT LOW
t
t
t
t
PHL
PLH
HZ
1.5V
1.5V
LZ
V
V
90%
50%
50%
OH
OL
10%
+ 0.5V
- 0.5V
t
F
3V
0V
3V
0V
+V
-V
V
V
V
V
V
V
V
0V
OH
OL
OH
OL
OH
CC
OL
OD
OD