CMOS Timer. LMC555 Datasheet

LMC555 Timer. Datasheet pdf. Equivalent

LMC555 Datasheet
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Part LMC555
Description CMOS Timer
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LMC555 CMOS Timer
LMC555
SNAS558M – FEBRUARY 2000 – REVISED JULY 2016
1 Features
1 Industry's Fastest Astable Frequency of 3 MHz
• Available in Industry's Smallest 8-Bump DSBGA
Package (1.43mm × 1.41mm)
• Less Than 1 mW Typical Power Dissipation at 5 V
Supply
• 1.5 V Supply Operating Voltage Ensured
• Output Fully Compatible With TTL and CMOS
Logic at 5 V Supply
• Tested to 10 mA, 50 mA Output Current Levels
• Reduced Supply Current Spikes During Output
Transitions
• Extremely Low Reset, Trigger, and Threshold
Currents
• Excellent Temperature Stability
• Pin-for-Pin Compatible With 555 Series of Timers
2 Applications
• Precision Timing
• Pulse Generation
• Sequential Timing
• Time Delay Generation
• Pulse Width Modulation
• Pulse Position Modulation
• Linear Ramp Generators
3 Description
The LMC555 device is a CMOS version of the
industry standard 555 series general-purpose timers.
In addition to the standard package (SOIC, VSSSOP,
and PDIP) the LMC555 is also available in a chip-
sized package (8-bump DSBGA) using TI's DSBGA
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
astable mode the oscillation frequency and duty cycle
are accurately set by two external resistors and one
capacitor. The use of TI's LMCMOS process extends
both the frequency range and the low supply
capability.
Device Information(1)
PART NUMBER PACKAGE
BODY SIZE (NOM)
SOIC (8)
4.90 mm × 3.91 mm
LMC555
VSSOP (8)
PDIP (8)
3.00 mm × 3.00 mm
9.81 mm × 6.35 mm
DSBGA (8)
1.43 mm × 1.41 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Pulse Width Modulator
Pulse Width Modulator Waveform:
Top Waveform - Modulation
Bottom Waveform - Output Voltage
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.



Texas Instruments LMC555
LMC555
SNAS558M – FEBRUARY 2000 – REVISED JULY 2016
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Pin Configuration and Functions ......................... 3
6 Specifications......................................................... 4
6.1 Absolute Maximum Ratings ...................................... 4
6.2 ESD Ratings.............................................................. 4
6.3 Recommended Operating Conditions....................... 4
6.4 Thermal Information ................................................. 4
6.5 Electrical Characteristics........................................... 5
7 Parameter Measurement Information .................. 6
8 Detailed Description .............................................. 7
8.1 Overview ................................................................... 7
8.2 Functional Block Diagram ......................................... 7
8.3 Feature Description................................................... 7
8.4 Device Functional Modes.......................................... 8
9 Application and Implementation ........................ 12
9.1 Application Information............................................ 12
9.2 Typical Application ................................................. 12
9.3 Frequency Divider ................................................... 14
9.4 Pulse Width Modulator ............................................ 14
9.5 Pulse Position Modulator ........................................ 15
9.6 50% Duty Cycle Oscillator ...................................... 16
10 Power Supply Recommendations ..................... 17
11 Layout................................................................... 17
11.1 Layout Guidelines ................................................. 17
11.2 Layout Example .................................................... 17
12 Device and Documentation Support ................. 18
12.1 Receiving Notification of Documentation Updates 18
12.2 Community Resources.......................................... 18
12.3 Trademarks ........................................................... 18
12.4 Electrostatic Discharge Caution ............................ 18
12.5 Glossary ................................................................ 18
13 Mechanical, Packaging, and Orderable
Information ........................................................... 18
4 Revision History
Changes from Revision L (February 2016) to Revision M
Page
• Changed order of Features list. ............................................................................................................................................. 1
• Changed stable to astable - typo. .......................................................................................................................................... 1
• Changed stable to astable - typo. .......................................................................................................................................... 7
• Changed beings to begins typo. ............................................................................................................................................. 8
• Changed typo LM555 to LMC555. ...................................................................................................................................... 12
• Changed typo LM555 to LMC555. ...................................................................................................................................... 12
• Added additional applications. ............................................................................................................................................. 14
Changes from Revision K (January 2015) to Revision L
Page
• Changed typo - temp range from 185 to 85 .......................................................................................................................... 4
Changes from Revision J (March 2013) to Revision K
Page
• Added Pin Configuration and Functions section, ESD Ratings table, Feature Description section, Device Functional
Modes, Application and Implementation section, Power Supply Recommendations section, Layout section, Device
and Documentation Support section, and Mechanical, Packaging, and Orderable Information section .............................. 1
Changes from Revision I (March 2013) to Revision J
Page
• Changed layout of National Semiconductor Data Sheet to TI format ................................................................................. 17
2 Submit Documentation Feedback
Product Folder Links: LMC555
Copyright © 2000–2016, Texas Instruments Incorporated



Texas Instruments LMC555
www.ti.com
5 Pin Configuration and Functions
D, DGK, and P Packages
8-Pin SOIC, VSSOP, and PDIP
(Top View)
LMC555
SNAS558M – FEBRUARY 2000 – REVISED JULY 2016
YPB Package
8-Pin DSBGA
(Top View)
PIN
SOIC, VSSOP, and DSBGA NO. NAME
PDIP NO.
1 A3 GND
2 B3 Trigger
3 C3 Output
4 C2 Reset
5 C1 Control
Voltage
6 B1 Threshold
7 A1 Discharge
8 A2 V+
Pin Functions
I/O DESCRIPTION
O Ground reference voltage
I Responsible for transition of the flip-flop from set to reset. The output of the
timer depends on the amplitude of the external trigger pulse applied to this pin
O Output driven waveform
I Negative pulse applied to this pin to disable or reset the timer. When not used
for reset purposes, it should be connected to VCC to avoid false triggering
I Control voltage controls the threshold and trigger levels. It determines the pulse
width of the output waveform. An external voltage applied to this pin can also
be used to modulate the output waveform
I Compares the voltage applied to the terminal with a reference voltage of 2/3
Vcc. The amplitude of voltage applied to this terminal is responsible for the set
state of the flip-flop.
I Open collector output which discharges a capacitor between intervals (in phase
with output). It toggles the output from high to low when voltage reaches 2/3 of
the supply voltage
I Supply voltage with respect to GND
Copyright © 2000–2016, Texas Instruments Incorporated
Product Folder Links: LMC555
Submit Documentation Feedback
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