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LT1780 Datasheet(PDF) 4 Page - Linear Technology

Part No. LT1780
Description  Low Power 5V RS232 Dual Driver/Receiver with ±15kV ESD Protection
Download  12 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT1780 Datasheet(HTML) 4 Page - Linear Technology

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4
LT1780/LT1781
CC
HARA TERISTICS
A
TYPICALPERFOR
CE
Receiver Input Thresholds
ON/OFF Thresholds
TEMPERATURE (
°C)
–55
0.50
0.75
1.25
1.50
1.75
3.00
2.25
0
50
75
1780 • G04
1.00
2.50
2.75
2.00
–25
25
100
125
INPUT HIGH
INPUT LOW
DATA RATE (kBAUD)
0
0
10
20
30
40
50
25
50
75
100
1780 • G05
125
150
2 DRIVERS ACTIVE
RL = 3k
CL = 2500pF
Supply Current vs Data Rate
TEMPERATURE (
°C)
–55
2.0
2.5
3.0
25
75
1780 • G06
1.5
1.0
–25
0
50
100
125
0.5
0
ON THRESHOLD
OFF THRESHOLD
Supply Current
TEMPERATURE (
°C)
–55
0
10
25
0
50
75
1780 • G07
5
20
15
–25
25
100
125
2 DRIVERS LOADED RL = 3k
1 DRIVER LOADED RL = 3k
NO LOAD
Driver Output Voltage
Driver Minimum Output Voltage
vs Load Capacitance
Driver Maximum Output Voltage
vs Load Capacitance
LOAD CAPACITANCE (nF)
0
5.0
5.5
6.0
6.5
7.0
7.5
8.0
24
6
8
1780 • G01
10
1357
9
20k BAUD
60k BAUD
120k BAUD
LOAD CAPACITANCE (nF)
0
–7.0
–6.5
–6.0
–5.5
–5.0
–4.5
–4.0
24
6
8
1780 • G02
10
1357
9
120k BAUD
60k BAUD
20k BAUD
TEMPERATURE (
°C)
–55
–10
–8
–4
–2
0
10
4
0
50
75
1780 • G03
–6
6
8
2
–25
25
100
125
OUTPUT HIGH
OUTPUT LOW
RL = 3k
VCC = 5V
VCC = 4.5V
VCC = 5.5V
VCC = 4.5V
VCC = 5V
VCC = 5.5V


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