National Semiconductor LMC555 Technical data

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LMC555
CMOS Timer

LMC555 CMOS Timer

February 2000

General Description

The LMC555 is a CMOS version of the industry standard
555 series general purpose timers. In addition to the stan­dard package(SOIC, MSOP, and MDIP) the LMC555 is also
available in achip sized package(8 Bump micro SMD) using
National’s micro SMD package technology. The LMC555 of­fers the same capability of generating accurate time delays
and frequencies as the LM555 but with much lower power
dissipation and supply current spikes. When operated as a
one-shot, the time delay is precisely controlled by a single
external resistor and capacitor. In the stable mode the oscil­lation frequency and duty cycle are accurately set by two ex­ternal resistors and one capacitor. The use of National Semi­conductor’s LMCMOS
range and low supply capability.

™

process extends boththe frequency

Block and Connection Diagrams

8-Pin SOIC, MSOP,

and MDIP Packages

Features

n Less than 1 mW typical power dissipation at 5V supply
n 3 MHz astable frequency capability
n 1.5V supply operating voltage guaranteed
n Output fully compatible with TTL and CMOS logic at 5V

supply

n Tested to −10 mA, +50 mA output current levels
n Reduced supply current spikes during output transitions
n Extremely low reset, trigger, and threshold currents
n Excellent temperature stability
n Pin-for-pin compatible with 555 series of timers
n Available in 8 pin MSOP Package and 8-Bump micro

SMD package

8-Bump micro SMD

DS008669-1

Top View

Top View

(bump side down)

LMCMOS™is a trademark of National Semiconductor Corp.

© 2000 National Semiconductor Corporation DS008669 www.national.com

DS008669-9

Ordering Information

LMC555

Package Temperature Range Package Marking Transport Media NSC

Industrial

−40˚C to +85˚C

8-LeadSmall Outline
(SO)

8-Lead Mini Small
Outline (MSOP)

8-Lead Molded Dip
(MDIP)

8-Bump micro SMD LMC555CBP F1 250 Units Tape and Reel

Metronome Circuit LMC555CBPEVAL N/A N/A N/A

LMC555CM LMC555CM Rails

LMC555CMX LMC555CM 2.5k Units Tape and Reel

LMC555CMM ZC5 1k Units Tape and Reel

LMC555CMMX ZC5 3.5k Units Tape and Reel

LMC555CN LMC555CN Rails

LMC555CBPX F1 3k Units Tape and Reel

micro SMD Marking Orientation

Top View

Drawing

M08A

MUA08A

N08E

BPA08EFB

Bumps are numbered counter-clockwise

DS008669-23

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LMC555

Absolute Maximum Ratings (Notes 2, 3)

If Military/Aerospace specified devices are required,
please contact theNational Semiconductor SalesOffice/
Distributors for availability and specifications.

Supply Voltage, V
Input Voltages, V

V

THRESH

Output Voltages, V
Output Current I
Storage Temperature Range −65˚C to +150˚C
Soldering Information

MDIP Soldering (10 seconds) 260˚C
SOIC, MSOP Vapor Phase (60

sec) 215˚C

+

TRIG,VRES,VCTRL

O,VDIS

O,IDIS

15V

,

−0.3V to VS+ 0.3V
15V

100 mA

Operating Ratings(Notes 2, 3)

Termperature Range −40˚C to +85˚C

Thermal Resistance (θ

SO, 8-lead Small Outline 169˚C/W
MSOP, 8-lead Mini Small

Outline 225˚C/W
MDIP, 8-lead Molded Dip 111˚C/W
8-Bump micro SMD 220˚C/W

Maximum Allowable Power

@

Dissipation

25˚C
MDIP-8 1126mW
SO-8 740mW
MSOP-8 555mW
8 Bump micro SMD 568mW

) (Note 2)

JA

SOIC, MSOP Infrared (15 sec) 220˚C

Note: See AN-450 “Surface Mounting Methods and Their Effect on Product

Reliability” for other methods of soldering surface mount devices.

Electrical Characteristics (Notes 1, 2)

Test Circuit, T=25˚C, all switches open, RESET to V

Symbol Parameter Conditions Min Typ Max Units

I

S

V

CTRL

V

DIS

V

OL

V

OH

V

TRIG

I

TRIG

V

RES

I

RES

I

THRESH

I

DIS

Supply Current V

Control Voltage V

Discharge Saturation
Voltage

Output Voltage (Low) V

Output Voltage
(High)

Trigger Voltage V

Trigger Current V
Reset Voltage V

Reset Current V
Threshold Current V
Discharge Leakage V

=

1.5V

S

=

5V

V

S

=

12V

V

S

=

1.5V

S

=

5V

V

S

=

12V

V

S

=

V

1.5V, I

S

=

5V, I

V

S

=

1.5V, I

S

=

5V, I

V

S

=

12V, I

V

S

=

V

1.5V, I

S

=

5V, I

V

S

=

12V, I

V

S

=

1.5V

S

=

12V

V

S

=

5V 10 pA

S

=

1.5V (Note 4)

S

=

12V

V

S

=

5V 10 pA

S

=

5V 10 pA

S

=

12V 1.0 100 nA

S

t Timing Accuracy SW 2, 4 Closed

=

V

1.5V

S

=

5V

V

S

=

12V

V

S

∆t/∆V

Timing Shift with Supply V

S

∆t/∆T Timing Shift with

Temperature

f

A

f

MAX

t

R,tF

Astable Frequency SW 1, 3 Closed, V
Maximum Frequency Max. Freq. Test Circuit, V
Output Rise and

Fall Times

=

5V

S

=

V

5V

S

−40˚C ≤ T ≤ +85˚C

Max. Freq. Test Circuit

=

5V, C

V

S

unless otherwise noted

S

0.8

2.9

7.4

=

1mA

DIS

=

10 mA

DIS

=

1mA

O

=

8mA

O

=

50 mA

O

=

O

O

=

=

O

−0.25 mA

−2 mA

−10 mA

1.0

4.4

10.5

0.4

3.7

0.4

0.4

0.9

1.0

1.0

±

1V 0.3

=

12V 4.0 4.8 5.6 kHz

S

=

5V 3.0 MHz

S

=

10 pF

L

(Limits)

50
100
150

1.0

3.3

8.0
75

150

0.2

0.3

1.0

150
250
400

1.2

3.8

8.6

150
300

0.4

0.6

2.0

µA

V

mV

V

1.25

4.7

V

11.3

0.5

4.0

0.7

0.75

1.1

1.1

1.1

0.6

4.3

1.0

1.1

1.25

1.20

1.25

V

V

ms

%

75 ppm/˚C

15 ns

/V

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Electrical Characteristics (Notes 1, 2)

Test Circuit, T=25˚C, all switches open, RESET to V

LMC555

Symbol Parameter Conditions Min Typ Max Units

t

PD

Trigger Propagation Delay V

=

5V, Measure Delay

S

from Trigger to Output

Note 1: All voltages are measured with respect to the ground pin, unless otherwise specified.
Note 2: Absolute Maximum Ratings indicate limits beyond which damagetothedevicemayoccur. Operating Ratings indicate conditions for whichthedeviceisfunc-

tional, but donotguaranteespecificperformancelimits.Electrical Characteristics state DC and AC electrical specifications under particular test conditions which guar­antee specific performance limits. This assumes that the device is within the Operating Ratings. Specifications are not guaranteed for parameters where no limit is
given, however, the typical value is a good indication of device performance.

Note 3: See AN-450 for other methods of soldering surface mount devices, and also AN-1112 for micro SMD considerations.
Note 4: If the RESET pin is to be used at temperatures of −20˚C and below V
Note 5: For device pinout please refer to table 1

unless otherwise noted (Continued)

S

is required to be 2.0V or greater.

S

100 ns

(Limits)

Test Circuit (Note 5)

DS008669-2

Maximum Frequency Test Circuit (Note 5)

TABLE 1. Package Pinout Names vs. Pin Function

Pin Function Package Pin numbers

8-Pin SO,MSOP, and MDIP 8-Bump micro SMD
GND 1 7
Trigger

26
Output 3 5
Reset

44
Control Voltage 5 3
Threshold 6 2
Discharge 7 1

+

V

88

DS008669-3

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