ISL83491 INTERSIL [Intersil Corporation], ISL83491 Datasheet - Page 9

• Manufacturer Part Number: ISL83491
• Description: 3.3V, Low Power, High Speed or Slew Rate Limited, RS-485/RS-422 Transceivers
• Manufacturer: INTERSIL [Intersil Corporation]

Test Circuits and Waveforms
SIGNAL
GENERATOR
SIGNAL
GENERATOR
t
t
t
t
t
t
t
t
t
t
t
t
HZ
LZ
ZH
ZL
ZH(SHDN)
ZL(SHDN)
HZ
LZ
ZH
ZL
ZH(SHDN)
ZL(SHDN)
PARAMETER
(Note 6)
(Note 6)
PARAMETER
(Note 9)
SIGNAL
GENERATOR
(Note 9)
GND
+1.5V
FIGURE 3A. TEST CIRCUIT
FIGURE 4A. TEST CIRCUIT
FIGURE 5A. TEST CIRCUIT
DE
DI
GND
OUTPUT
RE
Y/Z
Y/Z
Y/Z
Y/Z
Y/Z
Y/Z
FIGURE 5. RECEIVER ENABLE AND DISABLE TIMES (EXCLUDING ISL83488, ISL83490)
B
A
FIGURE 3. DRIVER ENABLE AND DISABLE TIMES (EXCLUDING ISL83488, ISL83490)
RE
D
B
A
DE
0
0
0
0
0
0
R
ISL83483, ISL83485, ISL83488, ISL83490, ISL83491
9
Y
0 (Note 5)
0 (Note 5)
1 (Note 8)
1 (Note 8)
Z
R
RO
RE
X
X
RO
+1.5V
+1.5V
+1.5V
-1.5V
-1.5V
-1.5V
A
C
15pF
(Continued)
110Ω
L
FIGURE 4. RECEIVER PROPAGATION DELAY
1kΩ
= 50pF
1/0
0/1
1/0
0/1
1/0
0/1
DI
15pF
SW
SW
GND
GND
GND
V
V
V
SW
GND
GND
GND
V
V
V
CC
CC
CC
SW
CC
CC
CC
GND
V
GND
V
CC
CC
OUT (Y, Z)
OUT (Y, Z)
t
t
t
t
ZH
ZL
ZH
ZL
RO
A
RE
RO
RO
, t
, t
NOTE 7
NOTE 7
DE
, t
, t
NOTE 7
NOTE 7
ZH(SHDN)
ZL(SHDN)
ZH(SHDN)
ZL(SHDN)
NOTE 7
NOTE 7
FIGURE 3B. MEASUREMENT POINTS
FIGURE 4B. MEASUREMENT POINTS
FIGURE 5B. MEASUREMENT POINTS
t
1.5V
PLH
1.5V
1.5V
OUTPUT HIGH
OUTPUT HIGH
50%
1.5V
1.5V
50%
OUTPUT LOW
50%
OUTPUT LOW
t
PHL
1.5V
t
t
t
HZ
1.5V
LZ
t
HZ
1.5V
LZ
50%
V
V
V
V
OH
OL
OH
OL
+ 0.25V
- 0.25V
- 0.25V
+ 0.25V
3V
0V
3V
0V
3V
0V
V
0V
V
V
V
CC
V
V
0V
V
OH
CC
OL
0V
OH
CC
OL