LM555QML.pdf

July 2006

LM555QML

Timer

General Description

The LM555 is a highly stable device for generating accurate

time delays or oscillation. Additional terminals are provided

for triggering or resetting if desired. In the time delay mode of

operation, the time is precisely controlled by one external

resistor and capacitor. For astable operation as an oscillator,

the free running frequency and duty cycle are accurately

controlled with two external resistors and one capacitor. The

circuit may be triggered and reset on falling waveforms, and

the output circuit can source or sink up to 200mA or drive

TTL circuits.

n Adjustable duty cycle

n Output can source or sink 200 mA

n Output and supply TTL compatible

n Temperature stability better than 0.005% per ˚C

n Normally on and normally off output

Applications

n Precision timing

n Pulse generation

n Sequential timing

n Time delay generation

n Pulse width modulation

n Pulse position modulation

n Linear ramp generator

Features

n Direct replacement for SE555/NE555

n Timing from microseconds through hours

n Operates in both astable and monostable modes

Ordering Information

NS Part Number

SMD Part Number

NS Package Number

Package Description

LM555H/883

H08A

8LD Metal Can

LM555J/883

J08A

8LD Ceramic Dip

Connection Diagrams

Dual-In-Line Package

Metal Can Package

20149833

Top View

20149803

Top View

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Schematic Diagram

20149801

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Absolute Maximum Ratings (Note 1)

Supply Voltage

+18V

Power Dissipation (Note 2)

Metal Can

760 mW

CERDIP

1180 mW

Operating Temperature Range

−55˚C ≤ T A ≤ +125˚C

Maximum Junction Temperature (T Jmax)

+150˚C

Storage Temperature Range

−65˚C

≤

T A

≤

+150˚C

Soldering Information (Soldering 10 Seconds)

260˚C

Thermal Resistance

θ JA

CERDIP Still Air

125˚C/W

CERDIP 500LF / Min Air Flow

71˚C/W

Metal Can Still Air

176˚C/W

Metal Can 500LF / Min Air Flow

96˚C/W

θ JC

CERDIP

20˚C/W

Metal Can

42˚C/W

ESD Tolerance (Note 3)

500V

Quality Conformance Inspection

Mil-Std-883, Method 5005 - Group A

Subgroup

Description

Temp ˚C

Static tests at

125

Static tests at

-55

Dynamic tests at

125

Dynamic tests at

-55

Functional tests at

125

Functional tests at

-55

Switching tests at

125

Switching tests at

-55

Settling time at

125

Settling time at

-55

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Electrical Characteristics

DC Parameters

The following conditions apply to all the following parameters, unless otherwise specified.

DC: +5V

≤

V CC

≤

+15V

Symbol

Parameter

Conditions

Notes Min Max Unit

Sub-

groups

I CCL

Supply Current Low State

V CC = 5V, R L = ∞

5.0 mA

V CC = 15V, R L =

∞

12.0 mA

V CC = 18V, R L = ∞ ,

V 2 =V 6 = 18V

18.5 mA

I L7

Leakage Current Pin 7

V CC = 18V, V 7 = 18V,

V 2 =V 6 =0

100

V Sat

Saturation Voltage Pin 7

V CC = 15V, I 7 = 15mA,

V 2 =V 6 = 12V

(Note 6)

240 mV

V CC = 4.5V, I 7 = 4.5mA

(Note 6)

80 mV

V CO

Control Voltage

V CC = 5V,

V 2 =V 6 =4V

2.9 3.8

1, 2, 3

V CC = 15V,

V 2 =V 6 = 12V

9.6 10.4 V

1, 2, 3

V Th

Threshold Voltage

9.5 10.5 V

I Th

Threshold Current

V 6 =V Th ,V 2 = 7.5V,

V Th =V Th Test Measured Value

(Note 7)

250

I Trig

Trigger Current

V 2 = 0

500

V Trig

Trigger Voltage

V CC = 15V

4.8 5.2

3.0 6.0

2, 3

V CC = 5V

(Note 4) 1.45 1.9

1, 2, 3

I Reset

Reset Current

V 2 =V 6 = Gnd

0.4 mA

V Reset Reset Voltage

0.4 1.0

V OL

Output Voltage Drop Low

V CC = 5V, I Sink = +8mA,

V 7 = 5V, V 6 =5V

250 mV

1, 2, 3

V CC = 15V, I Sink = +10mA,

V 2 =V 6 = 15V

150 mV

250 mV

2, 3

V CC = 15V, I Sink = +50mA,

V 2 =V 6 = 15V

500 mV

800 mV

2, 3

V CC = 15V, I Sink = +85mA,

V 2 =V 6 = 15V

2.2 V 1,2,3

V OH

Output Voltage Drop High

V CC = 15V, I Source = 85mA

12.75

2, 3

V CC = 5V, I Source = 85mA

2.75

2, 3

Aƒ

A Stable Frequency

(Note 5) 45 51 KHz

Timing Error

V CC = 5V

(Note 5)

± 2 % 1, 2, 3

V CC = 15V, 1K

Ω≤

R A

≤

100K

Ω

Timing error decreases with an

increase in V CC

(Note 5)

± 2 % 1, 2, 3

∆

tE /

∆

V CC Timing Drift with Supply

≤

V CC ≤

15V

(Note 5)

0.2 % / V 1, 2, 3

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Electrical Characteristics (Continued)

AC Parameters

The following conditions apply to all the following parameters, unless otherwise specified.

AC: +5V

≤

V CC

≤

+15V

Symbol

Parameter

Conditions

Notes Min Max Unit

Sub-

groups

Rise Time

V Trig = 5V

(Note 5)

250

9, 10

(Note 5)

400

Fall Time

V Trig = 5V

(Note 5)

250

9, 10

(Note 5)

400

Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is

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 test

conditions.

Note 2: The maximum power dissipation must be derated at elevated temperatures and is dictated by T Jmax (maximum junction temperature),

θ JA

or the number given in the Absolute Maximum Ratings, whichever is lower.

Note 3: Human body model, 1.5K

in series with 100pF.

Note 4: Guaranteed by tests at V CC = 15V.

Note 5: Guaranteed parameter, not tested.

Note 6: No protection against excessive pin 7 current is necessary providing the package dissipation rating will not be exceeded.

Note 7: This will determine the maximum value of R A +R B for 15V operation. The maximum total (R A +R B )is20M

Ω

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JA (package

junction to ambient thermal resistance), and T A (ambient temperature). The maximum allowable power dissipation at any temperature is P Dmax =(T Jmax -T A )/

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