LM809M3-2.63/NOPB National Semiconductor, LM809M3-2.63/NOPB Datasheet

LM809M3-2.63/NOPB

Manufacturer Part Number

LM809M3-2.63/NOPB

Description

IC MICRO RESET CIRCUIT SOT23-3

Manufacturer

National Semiconductor

Type

Simple Reset/Power-On Resetr

Datasheets

1.LM809M3-2.63NOPB.pdf (8 pages)

2.LM809M3-2.63NOPB.pdf (10 pages)

Specifications of LM809M3-2.63/NOPB

Package / Case

SOT-23-3, TO-236-3, Micro3™, SSD3, SST3

Mounting Type

Surface Mount

Operating Temperature

-40°C ~ 105°C

Output

Push-Pull, Totem Pole

Reset

Active Low

Number Of Voltages Monitored

Reset Timeout

140 ms Minimum

Voltage - Threshold

2.63V

Monitored Voltage

3 V , 3.3 V , 5 V

Undervoltage Threshold

2.59 V

Overvoltage Threshold

2.66 V

Output Type

Active Low

Manual Reset

Not Resettable

Watchdog

No Watchdog

Battery Backup Switching

Power-up Reset Delay (typ)

840 ms

Supply Voltage (max)

5.5 V

Supply Voltage (min)

1 V

Supply Current (typ)

15 uA (Typ)

Maximum Power Dissipation

320 mW

Maximum Operating Temperature

+ 105 C

Mounting Style

SMD/SMT

Minimum Operating Temperature

- 40 C

Power Fail Detection

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Other names

LM809M3-2.63TR

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LM809/LM810

3-Pin Microprocessor Reset Circuits

General Description

The LM809/810 microprocessor supervisory circuits can be

used to monitor the power supplies in microprocessor and

digital systems. They provide a reset to the microprocessor

during power-up, power-down and brown-out conditions.

The function of the LM809/810 is to monitor the V

voltage, and assert a reset signal whenever this voltage

declines below the factory-programmed reset threshold. The

reset signal remains asserted for 240ms after V

above the threshold. The LM809 has an active-low RESET

output, while the LM810 has an active-high RESET output.

Seven standard reset voltage options are available, suitable

for monitoring 5V, 3.3V, and 3V supply voltages.

With a low supply current of only 15µA, the LM809/810 are

ideal for use in portable equipment. The LM809/LM810 are

available in the 3-pin SOT23 package and in the 6-Lead LLP

package.

Typical Application Circuit

Connection Diagrams

( ) are for LM810

DS101057

10105702

supply

rises

Features

n Precise monitoring of 3V, 3.3V, and 5V supply voltages

n Superior upgrade to MAX809/810

n Fully specified over temperature

n 140ms min. Power-On Reset pulse width, 240ms typical

n Guaranteed RESET Output valid for V

n Low Supply Current, 15µA typ.

n Power supply transient immunity

Applications

n Microprocessor Systems

n Computers

n Controllers

n Intelligent Instruments

n Portable/Battery-Powered Equipment

n Automotive

Active-low RESET Output (LM809)

Active-high RESET Output (LM810)

See NS package Number LDB06A

10105701

( ) are for LM810

Top View

10105715

September 2002

≥1V

www.national.com

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