Datasheet

4
LT1780/LT1781
CCHARA TERIST
ICS
UW
AT
Y
P
I
CA
LPER
F
O
R
C
E
Receiver Input Thresholds
ON/OFF Thresholds
TEMPERATURE (°C)
–55
0.50
THRESHOLD VOLTAGE (V)
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
SUPPLY CURRENT (mA)
10
20
30
40
50
25
50 75 100
1780 • G05
125 150
2 DRIVERS ACTIVE
R
L
= 3k
C
L
= 2500pF
Supply Current vs Data Rate
TEMPERATURE (°C)
–55
THRESHOLD VOLTAGE (V)
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
SUPPLY CURRENT (mA)
10
25
0
50
75
1780 • G07
5
20
15
–25
25
100
125
2 DRIVERS LOADED R
L
= 3k
1 DRIVER LOADED R
L
= 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
PEAK OUTPUT VOLTAGE (V)
5.5
6.0
6.5
7.0
7.5
8.0
2468
1780 • G01
1013579
20k BAUD
60k BAUD
120k BAUD
LOAD CAPACITANCE (nF)
0
–7.0
PEAK OUTPUT VOLTAGE (V)
–6.5
–6.0
–5.5
–5.0
–4.5
–4.0
2468
1780 • G02
1013579
120k BAUD
60k BAUD
20k BAUD
TEMPERATURE (°C)
–55
–10
DRIVER OUTPUT VOLTAGE (V)
–8
–4
–2
0
10
4
0
50
75
1780 • G03
–6
6
8
2
–25
25
100
125
OUTPUT HIGH
OUTPUT LOW
R
L
= 3k
V
CC
= 5V
V
CC
= 4.5V
V
CC
= 5.5V
V
CC
= 4.5V
V
CC
= 5V
V
CC
= 5.5V