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LM3710 Datasheet(PDF) 6 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
Part No. LM3710
Description  Microprocessor Supervisory Circuits with Power Fail Input, Low Line Output, Manual Reset and Watchdog Timer
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Maker  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
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LM3710 Datasheet(HTML) 6 Page - National Semiconductor (TI)

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LM3710/LM3711 Series Electrical Characteristics (Continued)
Limits in the standard typeface are for T
J = 25˚C and limits in boldface type apply over full operating range. Unless otherwise
specified: V
CC = +2.2V to 5.5V.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
WDI
WDI
Watchdog Input
Current
−1
+1
µA
WDI
T
Watchdog Input
Threshold
0.2
V
CC
1.225
0.8
V
CC
V
t
WD
Watchdog
Timeout Period
Watchdog Timeout Period = E, F, G, H
Watchdog Timeout Period = J, K, L, M
Watchdog Timeout Period = N, P, Q, R
Watchdog Timeout Period = S, T, U, V
4.3
71
1120
17900
6.2
102
1600
25600
9.3
153
2400
38400
ms
PFI/MR
V
PFT
PFI Input
Threshold
1.200
1.225
1.250
V
V
MRT
MR Input
Threshold
MR, Low
0.8
V
MR, High
2.0
V
PFTH/
V
MRTH
PFI/MR Threshold
Hysteresis
PFI/MR falling: V
CC =VRST MAX to 5.5V
0.0032
V
RST
mV
I
PFI
Input Current
(PFI only)
−75
75
nA
R
MR
MR Pull-up
Resistance
35
56
75
k
t
MD
MR to Reset
Delay
12
µS
t
MR
MR Pulse Width
25
µS
PFO, LLO
V
OL
PFO, LLO Output
Voltage
V
CC > 2.25V, ISINK = 900µA
0.3
V
V
CC > 2.7V, ISINK = 1.2mA
0.3
V
CC > 4.5V, ISINK = 3.2mA
0.4
V
OH
V
CC > 2.25V, ISOURCE = 300µA
0.8 V
CC
V
CC > 2.7V, ISOURCE = 500µA
0.8 V
CC
V
CC > 4.5V, ISOURCE = 800µA
V
CC − 1.5V
LLO OUTPUT
V
LLOT
LLO Output
Threshold
(V
LLO −VRST,VCC
falling)
1.01
V
RST
1.02
V
RST
1.03
V
RST
V
V
LLOTH
Low-Line
Comparator
Hysteresis
0.0032
V
RST
mV
t
CD
Low-Line
Comparator Delay
V
CC falling at 1mV/µs
20
µs
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