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參數(shù)資料
| 型號： | LM3704YDMMX-643 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Microprocessor Supervisory Circuits with Power Fail Input, Low Line Output and Manual Reset |
| 中文描述： | 微處理器監(jiān)控電路，帶有電源故障輸入，低壓線路輸出和手動復(fù)位 |
| 文件頁數(shù)： | 6/17頁 |
| 文件大?。?/td> | 319K |
| 代理商： | LM3704YDMMX-643 |
LM3704/LM3705 Series Electrical Characteristics
(Continued)
Limits in the standard typeface are for T
J
= 25C and limits in
boldface type
apply over full operating range. Unless otherwise
specified: V
CC
= +2.2V to 5.5V.
Symbol
Parameter
Conditions
PFI/MR
V
PFT
PFI Input
Threshold
V
MRT
MR Input
Threshold
MR, High
V
PFTH
/
V
MRTH
Hysteresis
I
PFI
Input Current (PFI
only)
R
MR
MR Pull-up
Resistance
t
MD
MR to Reset
Delay
t
MR
MR Pulse Width
PFO, LLO
V
OL
PFO, LLO Output
Voltage
V
CC
>
2.7V, I
SINK
= 1.2mA
V
CC
>
4.5V, I
SINK
= 3.2mA
V
OH
V
CC
>
2.7V, I
SOURCE
= 500μA
V
CC
>
4.5V, I
SOURCE
= 800μA
LLO OUTPUT
V
LLOT
LLO Output
Threshold
(V
LLO
V
RST
, V
CC
falling)
V
LLOTH
Low-Line
Comparator
Hysteresis
t
CD
Low-Line
Comparator Delay
Min
Typ
Max
Units
1.200
1.225
1.250
V
MR, Low
0.8
V
2.0
PFI/MR Threshold
PFI/MR falling: V
CC
= V
RST MAX
to 5.5V
0.0032
V
RST
mV
75
75
nA
35
56
75
k
12
μS
25
μS
V
CC
>
2.25V, I
SINK
= 900μA
0.3
0.3
0.4
V
V
CC
>
2.25V, I
SOURCE
= 300μA
0.8 V
CC
0.8 V
CC
V
CC
1.5V
1.01
V
RST
1.02
V
RST
1.03
V
RST
V
0.0032
V
RST
mV
V
CC
falling at 1mV/μs
20
μs
Note 1: Absolute Maximum Ratings
indicate limits beyond which damage to the device may occur.
Operating Ratings
indicate conditions for which the device
is intended to be functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics.
The guaranteed specifications apply only for the test conditions listed. Some performance characteristics may degrade when the device is not operated under the
listed conditions.
Note 2:
The Human Body model is a 100 pF capacitor discharged through a 1.5 k
resistor into each pin. The machine model is a 200pF capacitor discharged
directly into each pin.
Note 3:
The maximum allowable power dissipation is a function of the maximum junction temperature, T
J
(MAX), the junction-to-ambient thermal resistance,
θ
J-A
,
and the ambient temperature, T
A
. The maximum allowable power dissipation at any ambient temperture is calculated using:
Where the value of
θ
J-A
for the MSOP-10 package is 195C/W in a typical PC board mounting and the micro SMD package is 220C/W.
L
www.national.com
6
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