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零件编号
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LT1781IS 查看數據表(PDF) - Linear Technology
零件编号
产品描述 (功能)
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LT1781IS
Low Power 5V RS232 Dual Driver/Receiver with ±15kV ESD Protection
Linear Technology
LT1781IS Datasheet PDF : 12 Pages
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LT1780/LT1781
TYPICAL PERFOR A CE CHARACTERISTICS
Driver Maximum Output Voltage
vs Load Capacitance
8.0
7.5
7.0
20k BAUD
6.5
60k BAUD
6.0
120k BAUD
5.5
5.0
01
2 345678
LOAD CAPACITANCE (nF)
9 10
1780 • G01
Driver Minimum Output Voltage
vs Load Capacitance
–4.0
–4.5
120k BAUD
–5.0
60k BAUD
–5.5
20k BAUD
–6.0
–6.5
–7.0
01
2 345678
LOAD CAPACITANCE (nF)
9 10
1780 • G02
Driver Output Voltage
10
8
R
L
= 3k
6
V
CC
= 5.5V
4
V
CC
= 5V
V
CC
= 4.5V
2
OUTPUT HIGH
0
OUTPUT LOW
–2
V
CC
= 4.5V
–4
V
CC
= 5V
V
CC
= 5.5V
–6
–8
–10
–55 –25
0 25 50 75
TEMPERATURE (
°
C)
100 125
1780 • G03
Receiver Input Thresholds
3.00
2.75
2.50
2.25
2.00
INPUT HIGH
1.75
1.50
INPUT LOW
1.25
1.00
0.75
0.50
–55 –25
0 25 50 75 100 125
TEMPERATURE (
°
C)
1780 • G04
Supply Current vs Data Rate
50
2 DRIVERS ACTIVE
R
L
= 3k
40
C
L
= 2500pF
30
20
10
0
0 25 50 75 100 125 150
DATA RATE (kBAUD)
1780 • G05
4
ON/OFF Thresholds
3.0
2.5
2.0
ON THRESHOLD
1.5
1.0
OFF THRESHOLD
0.5
0
–55 –25
0 25 50 75
TEMPERATURE (
°
C)
100 125
1780 • G06
Supply Current
25
20
2 DRIVERS LOADED R
L
= 3k
15
1 DRIVER LOADED R
L
= 3k
10
NO LOAD
5
0
–55 –25
0 25 50 75
TEMPERATURE (
°
C)
100 125
1780 • G07
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