isl3330 Intersil Corporation, isl3330 Datasheet - Page 12

• Manufacturer Part Number: isl3330
• Description: 3.3v, ?15kv Esd Protected, Dual Protocol Rs-232/rs-485 Transceivers
• Manufacturer: Intersil Corporation

Test Circuits and Waveforms
FOR SHDN TESTS, SWITCH ON AND RXEN L- H SIMULTANEOUSLY
SIGNAL
GENERATOR
PARAMETER
t
t
ZH(SHDN)
ZL(SHDN)
SIGNAL
GENERATOR
SIGNAL
GENERATOR
SIGNAL
GENERATOR
t
t
t
t
HZ
ZH
LZ
ZL
V
V
CC
CC
V
FIGURE 4A. TEST CIRCUIT
FIGURE 5A. TEST CIRCUIT
FIGURE 6A. TEST CIRCUIT
FIGURE 7A. TEST CIRCUIT
CC
0V
RXEN
B
DEN
D
RXEN
A, B
Y,Z
A
RXEN
A
B
DEN
D
R
X
X
X
X
R
0
0
12
R
R
R
Y, Z
A,
A
R
R
A
B
FIGURE 5. RS-485 RECEIVER ENABLE AND DISABLE TIMES
B (V)
R
+1.5
+1.5
+1.5
-1.5
-1.5
-1.5
FIGURE 4. RS-485 RECEIVER PROPAGATION DELAY
FIGURE 7. RS-232 RECEIVER PROPAGATION DELAY
L
FIGURE 6. RS-232 DRIVER PROPAGATION DELAY
15pF
(Continued)
1kΩ
15pF
C
C
L
L
= 15pF
SW
GND
GND
GND
V
V
V
SW
ISL3330, ISL3331
CC
CC
CC
GND
V
CC
SKEW = |t
SKEW = |t
OUT (Y,Z)
R
D
A, B
R
RXEN
A,
B
Y,Z
A
t
R
t
ZL(SHDN)
ZH(SHDN)
B
DPHL
t
RPHL
t
RPHL
DPHL
FIGURE 4B. MEASUREMENT POINTS
FIGURE 5B. MEASUREMENT POINTS
FIGURE 6B. MEASUREMENT POINTS
FIGURE 7B. MEASUREMENT POINTS
t
R
t
R
ZH
ZL
A
A
- t
- t
DPLH
RPLH
t
PLH
|
1.5V
|
1.5V
50%
0V
ENABLED
OUTPUT HIGH
1.5V
1.5V
0V
50%
1.5V
OUTPUT LOW
t
t
t
HZ
LZ
PHL
1.5V
1.5V
50%
0V
V
V
OH
OL
50%
0V
1.5V
+ 0.5V
- 0.5V
t
t
+1.5V
-1.5V
3V
0V
DPLH
RPLH
3V
0V
3V
0V
May 20, 2008
V
V
V
0V
V
OH
CC
OL
V
V
V
V
0V
CC
O+
OH
OL
FN6361.0
O-