LM3724IM5-3.08/NOPB National Semiconductor, LM3724IM5-3.08/NOPB Datasheet

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LM3724IM5-3.08/NOPB

Manufacturer Part Number
LM3724IM5-3.08/NOPB
Description
IC MPU SUPERVISR 3.08V SOT23-5
Manufacturer
National Semiconductor
Type
Simple Reset/Power-On Resetr
Datasheet

Specifications of LM3724IM5-3.08/NOPB

Number Of Voltages Monitored
1
Output
Open Drain or Open Collector
Reset
Active Low
Reset Timeout
100 ms Minimum
Voltage - Threshold
3.08V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
SOT-23-5, SC-74A, SOT-25
Monitored Voltage
2.5 V , 3.3 V , 5 V
Undervoltage Threshold
3.03 V
Overvoltage Threshold
3.14 V
Output Type
Active Low, Open Drain
Manual Reset
Resettable
Watchdog
No Watchdog
Battery Backup Switching
No
Power-up Reset Delay (typ)
190 ms (Typ)
Supply Voltage (max)
5.5 V
Supply Voltage (min)
1 V
Supply Current (typ)
10 uA
Maximum Power Dissipation
320 mW
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
Power Fail Detection
No
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
LM3724IM5-3.08
LM3724IM5-3.08TR

Available stocks

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Manufacturer
Quantity
Price
Part Number:
LM3724IM5-3.08/NOPB
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Quantity:
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Part Number:
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Manufacturer:
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© 2007 National Semiconductor Corporation
LM3722/LM3723/LM3724
5-Pin Microprocessor Reset Circuits
General Description
The LM3722/LM3723/LM3724 microprocessor supervisory
circuits monitor the power supplies in microprocessor and
digital systems. They provide a reset to the microprocessor
during power-up, power-down, brown-out conditions, and
manual reset.
The LM3722/LM3723/LM3724 asserts a reset signal when-
ever the supply decreases below the factory-programmed
reset threshold. Reset will be asserted for at least 100ms even
after V
The LM3722 has an active-low RESET push-pull output. The
LM3723 has an active-high RESET push-pull output. The
LM3724 has an active-low open-drain RESET output.
Three standard reset voltage options are available, suitable
for monitoring 5V, 3.3V, and 2.5V supply voltages. Additional
reset voltages are also available; contact National Semicon-
ductor for details.
With a low supply current of only 6µA, the LM3722/LM3723/
LM3724 are ideal for use in portable equipment. The LM3722/
LM3723/LM3724 are available in the 5-pin SOT23 package.
Typical Application Circuit
Connection Diagram
*( ) are for LM3723
CC
rises above the reset threshold.
200144
20014401
SOT23-5
Features
Applications
Precise monitoring of 2.5V, 3.3V, and 5V supply voltages
Fully specified over temperature
100 ms minimum Power-On Reset pulse width, 190 ms
typical:
Guaranteed RESET Output valid for V
Low Supply Current, 6µA typical
Power supply transient immunity
Compatible with MAX811/812 applications
Microprocessor Systems
Computers
Controllers
Intelligent Instruments
Portable/Battery-Powered Equipment
Industrial: −40°C to +85°C
Extended: −40°C to +125°C
Active-Low RESET Output (LM3722)
Active-High RESET Output (LM3723)
Active-Low RESET Open Drain Output (LM3724)
20014402
CC
www.national.com
1V
July 2007
20014437

Related parts for LM3724IM5-3.08/NOPB

LM3724IM5-3.08/NOPB Summary of contents

Page 1

... LM3724 are ideal for use in portable equipment. The LM3722/ LM3723/LM3724 are available in the 5-pin SOT23 package. Typical Application Circuit Connection Diagram *( ) are for LM3723 © 2007 National Semiconductor Corporation Features ■ Precise monitoring of 2.5V, 3.3V, and 5V supply voltages ■ Fully specified over temperature Industrial: − ...

Page 2

... Top Mark LM3723IM5X-4.63 R13B LM3723IM5X-3.08 R11B LM3723IM5X-2.32 R46B LM3724 Supplied as 3000 Package units, tape & reel Top Mark LM3724IM5X-4.63 R55B LM3724IM5X-3.08 R53B LM3724IM5X-2.32 R50B LM3722 Supplied as 3000 Package units, tape & reel Top Mark LM3722EM5X-4.63 R56B LM3722EM5X-3.08 R57B LM3722EM5X-2.32 R58B ...

Page 3

Pin Descriptions PIN NAME 1 GND Ground reference 2 GND Ground reference, device substrate, connect to ground. Active-low output. RESET remains low while V RESET LM3722/LM3724 and for 190 ms after V 3 Active-high output. RESET remains high while V ...

Page 4

... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications RESET, RESET Input Current, V Pin CC Output Current, RESET, RESET Pin ESD Rating (Note 2) Electrical Characteristics Typical values are +25°C. Limits with standard typeface are for T A temperature range (− ...

Page 5

Symbol Parameter V RESET Output Voltage Low OL (LM3724) I RESET Output Leakage IN Current (LM3724) Note 1: Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions under which the device operates ...

Page 6

Normalized V vs Temperature TH LM3724 Low V Characteristics CC www.national.com LM3724 V 20014416 20014406 6 vs Current OL 20014405 ...

Page 7

... Other reset thresholds in the 2.20V to 5.0V range steps, are available; contact National Semiconductor for details. MANUAL RESET INPUT (MR) Many µP-based products require a manual reset capability, allowing the operator to initiate a reset. The MR input is fully debounced and provides an internal 22 kΩ ...

Page 8

TABLE 1. Monitored Tolerance Table Supply Voltage Reset Threshold 2.5V 4.63 ± % 3.08 ± % 91.8-95.2 2.32 ± % 90.8-94.8 % ENSURING A VALID RESET OUTPUT DOWN TO V When V falls below 1V, the LM3722 RESET output is ...

Page 9

Typical Application Circuits FIGURE 3. Interfacing to Microprocessors with Bidirectional Reset I/O FIGURE 4. Regulator/Switch with Long-Term Overvoltage Lockout Prevents Overdissipation in Linear Regulator 20014411 9 20014422 www.national.com ...

Page 10

FIGURE 5. LM3722 Switch Debouncer FIGURE 6. LM3723 Power-On Delay 10 20014431 20014424 ...

Page 11

Physical Dimensions inches (millimeters) unless otherwise noted For Ordering, refer to Ordering Information table 5-Lead SOT23-5 NS Package Number MF05A 11 www.national.com ...

Page 12

... National Semiconductor and the National Semiconductor logo are registered trademarks of National Semiconductor Corporation. All other brand or product names may be trademarks or registered trademarks of their respective holders. ...

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