ISL81485IU Intersil, ISL81485IU Datasheet - Page 5

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ISL81485IU

Manufacturer Part Number
ISL81485IU
Description
IC TXRX RS485/422 5V HS 8-MSOP
Manufacturer
Intersil
Type
Transceiverr
Datasheet

Specifications of ISL81485IU

Number Of Drivers/receivers
1/1
Protocol
RS422, RS485
Voltage - Supply
4.5 V ~ 5.5 V
Mounting Type
Surface Mount
Package / Case
8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Test Circuits and Waveforms
PARAMETER OUTPUT
SIGNAL
GENERATOR
SIGNAL
GENERATOR
SIGNAL
GENERATOR
t
t
t
t
HZ
ZH
LZ
ZL
V
V
CC
CC
DE
DI
DE
DI
FIGURE 2A. TEST CIRCUIT
FIGURE 3A. TEST CIRCUIT
FIGURE 4A. TEST CIRCUIT
Y / Z
Y / Z
Y / Z
Y / Z
DE
DI
D
D
FIGURE 2. DRIVER PROPAGATION DELAY AND DIFFERENTIAL TRANSITION TIMES
D
Y
Z
Y
Z
RE
X
X
X
X
5
Z
Y
C
R
L
1 / 0
0 / 1
1 / 0
0 / 1
R
DI
DIFF
DIFF
FIGURE 3. DRIVER ENABLE AND DISABLE TIMES
(Continued)
110Ω
GND
GND
V
V
SW
C
C
C
CC
CC
C
L
L
L
L
= 100pF
= 100pF
= 100pF
= 100pF
SW
FIGURE 4. DRIVER DATA RATE
C
L
50
50
50
50
GND
V
(pF)
CC
ISL81485
DIFF OUT (Y - Z)
SKEW = |CROSSING PT. OF Y↑ & Z↓ - CROSSING PT. OF Y↓ & Z↑|
OUT (Y, Z)
OUT (Y, Z)
OUT (Y)
OUT (Z)
DIFF OUT (Y - Z)
DI
DE
DI
t
t
ZH
FIGURE 2B. MEASUREMENT POINTS
FIGURE 3B. MEASUREMENT POINTS
FIGURE 4B. MEASUREMENT POINTS
ZL
t
10%
R
90%
t
t
1.5V
PLH
PHL
-V
1.5V
OD
OUTPUT HIGH
50%
50%
2.3V
2.3V
OUTPUT LOW
t
t
PHL
PLH
t
1.5V
t
HZ
1.5V
LZ
90%
V
50%
V
50%
OH
OL
10%
+V
t
+ 0.5V
- 0.5V
F
OD
3V
0V
3V
0V
3V
0V
+V
0V
-V
V
V
V
V
V
V
V
OH
OH
OL
OL
0V
OD
OD
OH
CC
OL

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