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Part Name
Description
LTC690M View Datasheet(PDF) - Linear Technology
Part Name
Description
Manufacturer
LTC690M
3.3V Microprocessor Supervisory Circuits
Linear Technology
LTC690M Datasheet PDF : 16 Pages
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LTC690/LTC691
LTC694/LTC695
TYPICAL PERFOR A CE CHARACTERISTICS
V
OUT
vs I
OUT
5.00
4.95
4.90
4.85
4.80
V
CC
= 5V
V
BATT
= 2.8V
T
A
= 25
°
C
SLOPE = 5
Ω
V
OUT
vs I
OUT
2.80
2.78
2.76
V
CC
= 0V
V
BATT
= 2.8V
T
A
= 25
°
C
SLOPE = 125
Ω
2.74
4.75
0
10
20
30
40
50
LOAD CURRENT (mA)
690 G01
Reset Active Time
vs Temperature LTC690-1
58
V
CC
= 5V
56
54
52
50
48
46
– 50 –25
0 25 50 75
TEMPERATURE (
°
C)
100 125
690 G04
Power-Fail Comparator
Response Time
6
5
V
CC
= 5V
T
A
= 25
°
C
4
3
V
PFI
+
PFO
2
1.3V –
30pF
1
0
2.72
0
100 200 300 400 500
LOAD CURRENT (
µ
A)
690 G02
Reset Active Time
vs Temperature LTC694-5
232
V
CC
= 5V
224
216
208
200
192
184
– 50 –25
0 25 50 75
TEMPERATURE (
°
C)
100 125
690 G05
Power-Fail Comparator
Response Time
6
5
V
CC
= 5V
T
A
= 25
°
C
4
3
2
V
PFI
+
PFO
1
1.3V –
30pF
0
1.305V
1.285V
V
PFI
= 20mV STEP
01 2 34 567 8
TIME (
µ
s)
690 G07
1.315V
1.295V
V
PFI
= 20mV STEP
0 20 40 60 80 100 120 140 160 180
TIME (
µ
s)
690 G08
Power Failure Input Threshold
vs Temperature
1.308
V
CC
= 5V
1.306
1.304
1.302
1.300
1.298
1.296
1.294
– 50 –25
0 25 50 75
TEMPERATURE (
°
C)
100 125
690 G03
Reset Voltage Threshold
vs Temperature
4.66
4.65
4.64
4.63
4.62
4.61
4.60
– 50 –25
0 25 50 75
TEMPERATURE (
°
C)
100 125
690 G06
Power-Fail Comparator Response
Time with Pull-Up Resistor
6
5
V
CC
= 5V
T
A
= 25
˚
C
4
3
2
1
5V
V
PFI
+
10k
0
PFO
1.3V –
30pF
1.315V
1.295V
V
PFI
= 20mV STEP
0 2 4 6 8 10 12 14 16 18
TIME (
µ
s)
690 G09
7
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