ISL4485 Intersil Corporation, ISL4485 Datasheet - Page 6

• Manufacturer Part Number: ISL4485
• Description: 15kV ESD Protected/ 20Mbps/ 5V/ Low Power/ RS-485/RS-422 Transceiver
• Manufacturer: Intersil Corporation

Test Circuits and Waveforms
SIGNAL
GENERATOR
SIGNAL
GENERATOR
PARAMETER
V
CC
SIGNAL
GENERATOR
t
t
t
t
HZ
ZH
LZ
ZL
DE
DI
+1.5V
FIGURE 4A. TEST CIRCUIT
FIGURE 5A. TEST CIRCUIT
FIGURE 6A. TEST CIRCUIT
RE
A
D
B
B
A
RE
Y
Z
DE
R
0
0
0
0
R
6
RO
60Ω
RO
+1.5V
+1.5V
-1.5V
-1.5V
FIGURE 6. RECEIVER ENABLE AND DISABLE TIMES
A
15pF
(Continued)
C
15pF
FIGURE 5. RECEIVER PROPAGATION DELAY
1kΩ
D
= 200pF
FIGURE 4. DRIVER DATA RATE
SW
GND
GND
V
V
SW
CC
CC
V
GND
V
OD
+
-
CC
ISL4485E
DIFF OUT (Y - Z)
RO
DI
A
RE
RO
RO
t
t
ZH
ZL
FIGURE 4B. MEASUREMENT POINTS
FIGURE 5B. MEASUREMENT POINTS
FIGURE 6B. MEASUREMENT POINTS
-V
OD
t
1.5V
PLH
1.5V
OUTPUT HIGH
50%
1.5V
1.5V
OUTPUT LOW
t
t
PHL
t
1.5V
HZ
1.5V
LZ
+V
V
V
50%
OH
OL
OD
+ 0.5V
- 0.5V
3V
0V
3V
0V
3V
0V
0V
V
V
V
V
0V
0V
CC
OH
CC
OL