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부품번호 | LM3704XCMMX-308 기능 |
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기능 | Microprocessor Supervisory Circuits with Power Fail Input/ Low Line Output and Manual Reset | ||
제조업체 | National Semiconductor | ||
로고 | |||
전체 17 페이지수
July 2002
LM3704/LM3705
Microprocessor Supervisory Circuits with Power Fail
Input, Low Line Output and Manual Reset
General Description
The LM3704/LM3705 series of microprocessor supervisory
circuits provide the maximum flexibility for monitoring power
supplies and battery controlled functions in systems without
backup batteries. The LM3704/LM3705 series are available
in MSOP-10 and 9-bump micro SMD packages.
Built-in features include the following:
Reset: Reset is asserted during power-up, power-down, and
brownout conditions. RESET is guaranteed down to VCC of
1.0V.
Manual Reset Input: An input that asserts reset when pulled
low.
Power-Fail Input: A 1.225V threshold detector for power fail
warning, or to monitor a power supply other than VCC.
Low Line Output: This early power failure warning indicator
goes low when the supply voltage drops to a value which is
2% higher than the reset threshold voltage.
Features
n Standard Reset Threshold voltage: 3.08V
n Custom Reset Threshold voltages: For other voltages
between 2.2V and 5.0V in 10mV increments, contact
National Semiconductor Corp.
n No external components required
n Manual-Reset input
n RESET (LM3704) or RESET (LM3705) outputs
n Precision supply voltage monitor
n Factory programmable Reset Timeout Delay
n Separate Power Fail comparator
n Available in micro SMD package for minimum footprint
n ±0.5% Reset threshold accuracy at room temperature
n ±2% Reset threshold accuracy over temperature
extremes
n Reset assertion down to 1V VCC (RESET option only)
n 28 µA VCC supply current
Applications
n Embedded Controllers and Processors
n Intelligent Instruments
n Automotive Systems
n Critical µP Power Monitoring
Typical Application
© 2002 National Semiconductor Corporation DS101369
10136903
www.national.com
Ordering Information
*For other voltages between 2.2V and 5.0V, please contact National Semiconductor sales office.
LM3704/LM3705
Part Number
Output
Reset Timeout
Period
LM3704XCBP-308
totem-pole
LM3704XCBPX-308
totem-pole
LM3704XCMM-308
totem-pole
LM3704XCMMX-308
totem-pole
LM3705XCBP-308
totem-pole
LM3705XCBPX-308
totem-pole
LM3705XCMM-308
totem-pole
LM3705XCMMX-308
totem-pole
%% is the datecode and will vary with time.
200ms
200ms
200ms
200ms
200ms
200ms
200ms
200ms
Table Of Functions
Part
Active
Active
Number
Low
High
Reset
Reset
LM3704
x
LM3705
x
* = available upon request. Contact National
Output
(X = totem-pole)
(Y = open-drain)
X, Y*
X
Reset
Timeout
Period
Customized
Customized
10136904
Package
MSOP
micro
SMD
x
x
x
x
x
x
x
x
Package
Marking
%%I4
%%I4
R35B
R35B
%%I5
%%I5
R36B
R36B
Manual
Reset
x
x
Power Fail
Comparator
x
x
Low
Line
Output
x
x
www.national.com
4
4페이지 Typical Performance Characteristics
Supply Current vs Supply Voltage
3.3V Supply Current vs Temperature
10136915
Normalized Reset Threshold Voltage vs Temperature
10136911
Reset Timeout Period vs VCC
10136912
Reset Timeout Period vs Temperature
10136932
Max. Transient Duration vs Reset Comparator Overdrive
(VCC = 3.3V)
10136910
7
10136916
www.national.com
7페이지 | |||
구 성 | 총 17 페이지수 | ||
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부품번호 | 상세설명 및 기능 | 제조사 |
LM3704XCMMX-308 | Microprocessor Supervisory Circuits with Power Fail Input/ Low Line Output and Manual Reset | National Semiconductor |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |