LTC1235CS Linear Technology, LTC1235CS Datasheet - Page 5

• Manufacturer Part Number: LTC1235CS
• Manufacturer: Linear Technology

Specifications of LTC1235CS

• Number Of Elements: 1
• Monitored Voltage 1 (typ): 4.65V
• Battery Backup Switching: Yes
• Watchdog Timer: Yes
• Chip Enable Signals: Yes
• Reset Active Time: 280ms
• Manual Reset: Yes
• Package Type: SOL
• Operating Supply Voltage (min): 4.75V
• Operating Supply Voltage (max): 5.5V
• Reset Threshold Voltage (max): 4.75V
• Reset Threshold Voltage (min): 4.5V
• Power Dissipation: 500mW
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Power Fail Detection: Yes
• Mounting: Surface Mount
• Pin Count: 16
• Supply Current: 1.5mA
• Lead Free Status / Rohs Status: Not Compliant

TYPICAL PERFORMANCE CHARACTERISTICS
1.305V
1.285V
5.00
4.95
4.85
4.80
4.75
4.90
5
4
2
1
0
6
4
3
5
3
2
0
1
0
0
V
RESET Output Voltage vs
SupplyVoltage
Power Fail Comparator
Response Time
T
EXTERNAL PULLUP = 10μA
V
OUT
SLOPE = 5Ω
A
BATT
0
= 25°C
vs I
10
= 0V
1
1
V
OUT
SUPPLY VOLTAGE (V)
PFI
LOAD CURRENT (mA)
2
= 20mV STEP
20
2
3
TIME (μs)
1.3V
V
PFI
4
30
3
+
–
5
PFO
V
V
T
6
A
CC
BATT
V
T
= 25
40
CC
A
= 5V
4
7
= 25
= 2.8V
= 5V
°
30pF
C
1235 G01
1235 G04
1235 G07
8
°
C
50
5
1.315V
1.295V
2.80
2.76
2.74
2.72
2.78
232
224
200
184
216
208
192
6
4
2
0
5
3
1
–50
0
V
Reset Active Time vs
Temperature
Power Fail Comparator
Response Time
V
V
T
OUT
SLOPE = 125Ω
CC
CC
A
0
–25
= 25
= 5V
= 5V
100
vs I
20
°
C
V
40
OUT
0
PFI
LOAD CURRENT (μA)
TEMPERATURE (
= 20mV STEP
200
60
25
TIME (μs)
1.3V
V
PFI
80
BACKUP MODE
SELECTED
50
300
100
+
–
°
PFO
120
V
V
T
C)
75
A
CC
BATT
= 25
= 0V
400
140
= 2.8V
100
°
C
30pF
160
1235 G05
1235 G08
1235 G02
125
500
180
1.315V
1.295V
1.308
1.300
1.296
1.306
1.304
1.302
1.298
1.294
4.66
4.65
4.64
4.63
4.62
4.60
4.61
6
5
4
2
0
3
1
–50
–50
Power Failure Input Threshold
vs Temperature
Reset Voltage Threshold vs
Temperature
Power Fail Comparator Response
Time with Pullup Resistor
V
T
V
A
CC
CC
0
–25
–25
= 25
= 5V
= 5V
2
°
C
V
PFI
0
0
4
TEMPERATURE (
TEMPERATURE (
= 20mV STEP
6
TIME (μs)
25
25
V
1.3V
LTC1235
PFI
8
50
50
10
+
–
°
˚
PFO
C)
C)
12
75
75
+5V
14
100
100
10k
30pF
16
1235 G09
1235 G03
1235 G06
1235fa
5
125
125
18