LM809M3-2.93全新原装原理图各脚功能电路原理芯片引脚定义-中国IC网-芯三七

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产品型号LM809M3-2.93的概述

LM809M3-2.93芯片概述 LM809M3-2.93是一款高性能、低功耗的电压监测和复位芯片，广泛应用于各种电子设备的电源管理系统。这种芯片主要用于确保系统在电源电压下降至危险水平时能及时进行复位，从而保护系统的稳定性和安全性。它通常被应用于微控制器、单片机等需要可靠电源电压的场合，提供了一种经济实用的解决方案。 LM809M3-2.93的详细参数 LM809M3-2.93的主要电气参数包括： - 输入电压范围：2.5V至30V - 复位输出电压：在电源电压低于设定阈值时，输出为逻辑低电平 - 复位延迟时间：可设定，通常在10ms至200ms之间 - 工作温度范围：-40°C至+85°C - 静态电流：约为2.5μA，适合于低功耗应用 - 输入电压阈值：具体版本的阈值为2.93V，其他版本的阈值有所不同 - 复位输出类型：开漏输出 LM809M3-2.93的设计允许其在不同的条件...

产品型号LM809M3-2.93的Datasheet PDF文件预览

September 2002

LM809/LM810

3-Pin Microprocessor Reset Circuits

General Description

Features

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

n Superior upgrade to MAX809/810

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.

n Fully specified over temperature

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

Active-low RESET Output (LM809)

Active-high RESET Output (LM810)

n Guaranteed RESET Output valid for V_CC≥1V

n Low Supply Current, 15µA typ.

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

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_CCrises

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

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

n Power supply transient immunity

Seven standard reset voltage options are available, suitable

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

Applications

n Microprocessor Systems

n Computers

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.

n Controllers

n Intelligent Instruments

n Portable/Battery-Powered Equipment

n Automotive

Typical Application Circuit

10105701

Connection Diagrams

10105702

( ) are for LM810

10105715

Top View

See NS package Number LDB06A

( ) are for LM810

DS101057

www.national.com

Ordering Information

Reset Threshold LM809 Supplied as 1000 LM809 Supplied as 3000

Package

Top Mark

S8B

Package

Type

(V)

units, tape & reel

LM809M3-4.63

LM809M3-4.38

LM809M3-4.00

LM809M3-3.08

LM809M3-2.93

LM809M3-2.63

LM809M3-2.45

units, tape & reel

LM809M3X-4.63

LM809M3X-4.38

LM809M3X-4.00

LM809M3X-3.08

LM809M3X-2.93

LM809M3X-2.63

LM809M3X-2.45

NSC Package

4.63

4.38

4.00

3.08

2.93

2.63

2.45

S7B

S6B

S5B

SOT23-3

M03B

S4B

S3B

SFB

Reset Threshold LM810 Supplied as 1000 LM810 Supplied as 3000

Package

Top Mark

SEB

Package

Type

(V)

units, tape & reel

LM810M3-4.63

LM810M3-4.38

LM810M3-4.00

LM810M3-3.08

LM810M3-2.93

LM810M3-2.63

units, tape & reel

LM810M3X-4.63

LM810M3X-4.38

LM810M3X-4.00

LM810M3X-3.08

LM810M3X-2.93

LM810M3X-2.63

NSC Package

4.63

4.38

4.00

3.08

2.93

2.63

SDB

SCB

SOT23-3

M03B

SBB

SAB

S9B

Reset Threshold LM809 Supplied as 1000 LM809 Supplied as 4500

Package

Top Mark

S13

Package

Type

(V)

units, tape & reel

NSC Package

2.63

LM809LD-2.63

LM809LDX-2.63

LLP-6

LDB06A

Custom voltages and improved accuracies are available, subject to minimum orders. Contact your local National Semiconductor Sales Office for information.

Pin Descriptions

NAME

GND

FUNCTION

(LLP)

SOT-23

Ground reference

Active-low output. RESET remains low while V_CCis below the reset threshold,

and for 240ms after V_CCrises above the reset threshold.

Active-high output. RESET remains high while V_CCis below the reset

threshold, and for 240ms after V_CCrises above the reset threshold.

Supply Voltage (+5V, +3.3V, or +3.0V)

RESET (LM809)

RESET (LM810)

V_CC

www.national.com

Absolute Maximum Ratings (Note 1)

Continuous Power Dissipation

(Note 4)

320mW

If Military/Aerospace specified devices are required,

please contact the National Semiconductor Sales Office/

Distributors for availability and specifications.

θ_JA

LLP-6

152˚C/W

326˚C/W

V_CC

−0.3V to 6.0V

−0.3V to (V_CC+ 0.3V)

20mA

SOT23-3

RESET, RESET

Input Current, V_CCPin

Output Current, RESET, RESET

Ambient Temperature Range

Maximum Junction Temperature

Storage Temperature Range

Lead Temperature (soldering,

10sec)

−40˚C to +105˚C

125˚C

−65˚C to +160˚C

20mA

100V/µs

2kV

Rate of Rise, V_CC

ESD Rating (Note 2)

+300˚C

Electrical Characteristics

V_CC= full range, T_A= −40˚C to +105˚C, unless otherwise noted. Typical values are at T_A= +25˚C, V_CC= 5V for

4.63/4.38/4.00 versions, V_CC= 3.3V for 3.08/2.93 versions, and V_CC= 3V for 2.63/2.45 version (Note 3).

Symbol

Parameter

Conditions

T_A= 0˚C to +70˚C

T_A= −40˚C to +105˚C

Min

1.0

1.2

Typ

Max

5.5

Units

V_CCRange

T_A= −40˚C to

+85˚C

V_CC5.5V, LM8_ _

-4.63/4.38/4.00

V_CC3.6V, LM8_ _

-3.08/2.93/2.63/2.45

I_CC

Supply Current

µA

T_A= +85˚C to

+105˚C

V_CC5.5V, LM8_ _

100

-4.63/4.38/4.00

V_CC3.6V, LM8_ _

-3.08/2.93/2.63/2.45

T_A= +25˚C

4.56

4.50

4.40

4.31

4.25

4.16

3.93

3.89

3.80

3.04

3.00

2.92

2.89

2.85

2.78

2.59

2.55

2.50

2.41

2.38

2.33

4.63

4.38

4.00

3.08

2.93

2.63

2.45

4.70

4.75

4.86

4.45

4.50

4.56

4.06

4.10

4.20

3.11

3.15

3.23

2.96

3.00

3.08

2.66

2.70

2.76

2.49

2.52

2.57

LM8_ _ -4.63

LM8_ _ -4.38

LM8_ _ -4.00

LM8_ _ -3.08

LM8_ _ -2.93

LM8_ _ -2.63

LM8_ _ -2.45

T_A= −40˚C to +85˚C

T_A= +85˚C to +105˚C

T_A= +25˚C

T_A= −40˚C to +85˚C

T_A= +85˚C to +105˚C

T_A= +25˚C

T_A= −40˚C to +85˚C

T_A= +85˚C to +105˚C

T_A= +25˚C

V_TH

Reset Threshold (Note 5)

T_A= −40˚C to +85˚C

T_A= +85˚C to +105˚C

T_A= +25˚C

T_A= −40˚C to +85˚C

T_A= +85˚C to +105˚C

T_A= +25˚C

T_A= −40˚C to +85˚C

T_A= +85˚C to +105˚C

T_A= +25˚C

T_A= −40˚C to +85˚C

T_A= +85˚C to +105˚C

Reset Threshold

ppm/˚C

µs

Temperature Coefficient

V_CCto Reset Delay (Note 5) V_CC= V_THto (V_TH− 100mV)

T_A= −40˚C to +85˚C

Reset Active Timeout Period

140

240

560

T_A= +85˚C to +105˚C

100

840

www.national.com

Electrical Characteristics (Continued)

V_CC= full range, T_A= −40˚C to +105˚C, unless otherwise noted. Typical values are at T_A= +25˚C, V_CC= 5V for

4.63/4.38/4.00 versions, V_CC= 3.3V for 3.08/2.93 versions, and V_CC= 3V for 2.63/2.45 version (Note 3).

Symbol

Parameter

Conditions

V_CC= V_THmin, I_SINK= 1.2mA,

LM809-2.45/2.63/2.93/3.08

V_CC= V_THmin, I_SINK= 3.2mA,

LM809-4.63/4.38/4.00

Min

Typ

Max

Units

0.3

RESET Output Voltage Low

(LM809)

V_OL

0.4

0.3

V_CC1.0V, I_SINK= 50µA

V_CCV_THmax, I_SOURCE= 500µA,

0.8V_CC

LM809-2.45/2.63/2.93/3.08

RESET Output Voltage High

(LM809)

V_OH

V_CCV_THmax, I_SOURCE= 800µA,

V_CC−1.5

LM809-4.63/4.38/4.00

V_CC= V_THmax, I_SINK= 1.2mA,

LM810-2.63/2.93/3.08

0.3

0.4

RESET Output Voltage Low

(LM810)

V_OL

V_CC= V_THmax, I_SINK= 3.2mA,

LM810-4.63/4.38/4.00

V_OH

RESET Output Voltage High

(LM810)

0.8V_CC

1.8V V_CCV_THmin, I_SOURCE= 150µA

Note 1: Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions under which the device operates

correctly. Operating ratings do not imply guaranteed performance limits. For guaranteed performance limits and associated test conditions, see the Electrical

Characteristics.

Note 2: The human body model is a 100pF capacitor discharged through a 1.5kΩ resistor into each pin.

Note 3: Production testing done at T = +25˚C, over temperature limits guaranteed by design only.

Note 4: At elevated temperatures, devices must be derated based on package thermal resistance. The device in the SOT23-3 package must be derated at 4mW/˚C

at ambient temperatures above 70˚C. The device has internal thermal protection.

Note 5: RESET Output for LM809, RESET output for LM810.

www.national.com

Typical Performance Characteristics

Supply Current vs Temperature

(No Load, LM8_ _-2.63/2.93/3.08)

Power-Down Reset Delay vs Temperature

(LM8_ _-4.63/4.38)

10105703

10105706

Supply Current vs Temperature

(No Load, LM8_ _-4.63/4.38)

Power-Up Reset Timeout vs Temperature

10105707

10105704

Normalized Reset Threshold vs Temperature

Power-Down Reset Delay vs Temp

(LM8_ _-2.63/2.93/3.08)

10105708

10105705

www.national.com

Typically, for the 4.63V and 4.38V version of the LM809/810,

a V_CCtransient that goes 100mV below the reset threshold

and lasts 20µs or less will not cause a reset pulse. A 0.1 µF

bypass capacitor mounted as close as possible to the V_CC

pin will provide additional transient rejection.

Applications Information

Benefits of Precision Reset Thresholds

A microprocessor supply supervisor must provide a reset

output within a predictable range of the supply voltage. A

common threshold range is between 5% and 10% below the

nominal supply voltage. The 4.63V and 3.08V options of the

LM809/810 use highly accurate circuitry to ensure that the

reset threshold occurs only within this range (for 5V and 3.3V

supplies). The other voltage options have the same tight

tolerance to ensure a reset signal for other narrow monitor

ranges. See Table 1 for examples of how the standard reset

thresholds apply to 3V, 3.3V, and 5V nominal supply volt-

ages.

TABLE 1. Reset Thresholds Related to Common

Supply Voltages

Reset

3.0V

3.3V

5.0V

Threshold

4.63 3%

4.38 3%

4.00 3%

3.08 3%

2.93 3%

2.63 3%

2.45 3%

90 - 95%

85 - 90%

78 - 82%

10105709

FIGURE 2. Maximum Transient Duration without

Causing a Reset Pulse vs. Reset Comparator

Overdrive

90 - 95%

86 - 90%

77 - 81%

72 - 76%

85 - 90%

79 - 84%

Interfacing to µPs with Bidirectional Reset Pins

Microprocessors with bidirectional reset pins, such as the

Motorola 68HC11 series, can be connected to the LM809

RESET output. To ensure a correct output on the LM809

even when the microprocessor reset pin is in the opposite

state, connect a 4.7kΩ resistor between the LM809 RESET

output and the µP reset pin, as shown in Figure 3. Buffer the

LM809 RESET output to other system components.

Ensuring a Valid Reset Output Down to V_CC= 0V

When V_CCfalls below 1V, the LM809 RESET output no

longer sinks current. A high-impedance CMOS logic input

connected to RESET can therefore drift to undetermined

voltages. To prevent this situation, a 100kΩ resistor should

be connected from the RESET output to ground, as shown in

Figure 1.

A 100kΩ pull-up resistor to V_CCis also recommended for the

LM810, if RESET is required to remain valid for V_CC1V.

10105711

10105710

FIGURE 3. Interfacing to Microprocessors with

Bidirectional Reset I/O

FIGURE 1. RESET Valid to V_CC= Ground Circuit

Negative-Going V_CCTransients

LLP Mounting

The LM809/810 are relatively immune to short

negative-going transients or glitches on V_CC. Figure 2 shows

the maximum pulse width a negative-going V_CCtransient

can have without causing a reset pulse. In general, as the

magnitude of the transient increases, going further below the

threshold, the maximum allowable pulse width decreases.

The LLP package requires special mounting techniques

which are detailed in National Semiconductor Application

Note AN-1187. Referring to the section PCB Design Recom-

mendations, it should be noted that the pad style which

should be used with the LLP package is the NSMD (non-

solder mask defined) type.

www.national.com

Physical Dimensions inches (millimeters) unless otherwise noted

3-Lead SOT23-3

For Ordering, refer to Ordering Information table

NS Package Number M03B

6-Lead LLP (NLDBB006)

For Ordering, refer to Ordering Information table

NS Package Number LDB06A

www.national.com

Notes

LIFE SUPPORT POLICY

NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT

DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL

COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein:

1. Life support devices or systems are devices or

systems which, (a) are intended for surgical implant

into the body, or (b) support or sustain life, and

whose failure to perform when properly used in

accordance with instructions for use provided in the

labeling, can be reasonably expected to result in a

significant injury to the user.

2. A critical component is any component of a life

support device or system whose failure to perform

can be reasonably expected to cause the failure of

the life support device or system, or to affect its

safety or effectiveness.

National Semiconductor

Corporation

Americas

National Semiconductor

Europe

National Semiconductor

Asia Pacific Customer

Response Group

Tel: 65-2544466

Fax: 65-2504466

National Semiconductor

Japan Ltd.

Tel: 81-3-5639-7560

Fax: 81-3-5639-7507

Fax: +49 (0) 180-530 85 86

Email: support@nsc.com

Email: europe.support@nsc.com

Deutsch Tel: +49 (0) 69 9508 6208

English Tel: +44 (0) 870 24 0 2171

Français Tel: +33 (0) 1 41 91 8790

Email: ap.support@nsc.com

www.national.com

National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications.

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LM809M3-2.93产品参数

型号:	LM809M3-2.93
是否Rohs认证：	不符合
生命周期：	Transferred
包装说明：	SOT-23, 3 PIN
Reach Compliance Code：	not_compliant
ECCN代码：	EAR99
HTS代码：	8542.39.00.01
风险等级：	2.93
其他特性：	POWER-ON RESET
可调阈值：	NO
模拟集成电路 - 其他类型：	POWER SUPPLY SUPPORT CIRCUIT
JESD-30 代码：	R-PDSO-G3
JESD-609代码：	e0
长度：	2.9 mm
湿度敏感等级：	1
信道数量：	1
功能数量：	1
端子数量：	3
最高工作温度：	105 °C
最低工作温度：	-40 °C
封装主体材料：	PLASTIC/EPOXY
封装代码：	TSOP
封装等效代码：	TO-236
封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE, THIN PROFILE
峰值回流温度（摄氏度）：	260
电源：	1.2/5.5 V
认证状态：	Not Qualified
座面最大高度：	1.041 mm
子类别：	Power Management Circuits
最大供电电流 (Isup)：	0.1 mA
最大供电电压 (Vsup)：	5.5 V
最小供电电压 (Vsup)：	1 V
标称供电电压 (Vsup)：	3.3 V
表面贴装：	YES
技术：	CMOS
温度等级：	INDUSTRIAL
端子面层：	Tin/Lead (Sn/Pb)
端子形式：	GULL WING
端子节距：	0.95 mm
端子位置：	DUAL
阈值电压标称：	+2.93V
处于峰值回流温度下的最长时间：	40
宽度：	1.3 mm
Base Number Matches：	1

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产品型号LM809M3-2.93的概述

产品型号LM809M3-2.93的Datasheet PDF文件预览

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