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LTC491CS#PBF

P1-P3P4-P6P7-P9P10-P12
LTC491
4
491fa
TTL Input Threshold vs Temperature Driver Skew vs Temperature Supply Current vs Temperature
Driver Output High Voltage Driver Differential Output Voltage Driver Output Low Voltage
vs Output Current, T
A
= 25°C vs Output Current, T
A
= 25°C vs Output Current, T
A
= 25°C
Driver Differential Output Voltage Receiver t
PLH
t
PHL
Receiver Output Low Voltage
vs Temperature, R
O
= 54Ω vs Temperature vs Temperature at I = 8mA
TYPICAL PERFOR A CE CHARACTERISTICS
UW
OUTPUT VOLTAGE (V)
0
OUTPUT CURRENT (mA)
0
–24
– 4 8
–72
–96
1234
LTC491 • TPC01
OUTPUT VOLTAGE (V)
0
OUTPUT CURRENT (mA)
0
16
32
48
64
1234
LTC491 • TPC02
OUTPUT VOLTAGE (V)
0
OUTPUT CURRENT (mA)
0
20
40
60
80
1234
LTC491 • TPC03
TEMPERATURE (°C )
–50
INPUT THRESHOLD VOLTAGE (V)
1.55
1.57
1.59
1.61
1.63
0 50 100
LTC491 • TPC04
TEMPERATURE (°C )
–50
TIME (ns)
1.0
2.0
3.0
4.0
5.0
0 50 100
LTC491 • TPC05
TEMPERATURE (°C )
–50
SUPPLY CURRENT (µA)
310
320
330
340
350
0 50 100
LTC491 • TPC06
TEMPERATURE (°C )
–50
DIFFERENTIAL VOLTAGE (V)
1.5
1.7
1.9
2.1
2.3
0 50 100
LTC491 • TPC07
TEMPERATURE (°C )
–50
TIME (ns)
3.0
4.0
5.0
6.0
7.0
0 50 100
LTC491 • TPC08
TEMPERATURE (°C )
–50
OUTPUT VOLTAGE (V)
0
0.2
0.4
0.6
0.8
0 50 100
LTC491 • TPC09
5
LTC491
491fa
Figure 2. Driver/Receiver Timing Test Circuit
Figure 1. Driver DC Test Load
Figure 3. Receiver Timing Test Load
Figure 4. Driver Timing Test Load
TEST CIRCUITS
LTC491 • F01
Y
Z
R
R
V
OD2
V
OC
LTC491 • F02
DRIVER
D
Y
Z
RECEIVER
R
DIFF
A
B 15pF
C
L1
C
L2
R
LTC491 • F03
RECEIVER
OUTPUT
C
L
S1
1k
CC
V
S2
1k
LTC491 • F04
OUTPUT
UNDER TEST
C
L
S1
500
CC
V
Ω
S2
LTC491
6
491fa
Figure 5. Driver Propagation Delays
Figure 6. Driver Enable and Disable Times
Figure 7. Receiver Propagation Delays
Figure 8. Receiver Enable and Disable Times
SWITCHI G TI E WAVEFOR S
UWW
–V
O
LTC491 • F05
D
3V
0V
1.5V
t
PLH
1.5V
V
DIFF
= V(Y) – V(Z)
V
O
80%
20%
50%
10%
Z
Y
t
SKEW
t
r
f = 1MHz : t
r
≤ 10ns : t
f
≤ 10ns
90%
50%
t
PHL
t
f
V
O
t
SKEW
1/2 V
O
1/2 V
O
LTC491 • F06
A, B
DE
3V
0V
f = 1MHz : t
r
≤ 10ns : t
r
≤ 10ns
V
OL
V
OH
1.5V 1.5V
5V
OUTPUT NORMALLY LOW
t
ZL
2.3V
t
LZ
0.5V
A, B
0V
t
ZH
2.3V
OUTPUT NORMALLY HIGH
t
HZ
0.5V
V
OL
LTC491 • F07
A-B
V
OD2
0V
t
PLH
0V
OUTPUT
V
OH
1.5V
f = 1MHz ; t
r
≤ 10ns : t
f
≤ 10ns
t
PHL
–V
OD2
1.5V
INPUT
R
LTC491 • F08
R
REB
3V
0V
f = 1MHz : t
r
≤ 10ns : t
f
≤ 10ns
V
OL
V
OH
1.5V 1.5V
5V
OUTPUT NORMALLY LOW
t
ZL
1.5V
t
LZ
0.5V
R
0V
t
ZH
1.5V
OUTPUT NORMALLY HIGH
t
HZ
0.5V
P1-P3P4-P6P7-P9P10-P12

LTC491CS#PBF

Mfr. #:
Buy LTC491CS#PBF
Manufacturer:
Analog Devices Inc.
Description:
RS-422/RS-485 Interface IC Low Power RS485 Tx/Rx
Lifecycle:
New from this manufacturer.
Delivery:
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