Hex Bounce Eliminator

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Overview

The MC14490 is constructed with complementary MOS enhancement mode devices, and is used for the elimination of extraneous level changes that result when interfacing with mechanical contacts. The digital contact bounce eliminator circuit takes an input signal from a bouncing contact and generates a clean digital signal four clock periods after the input has stabilized. The bounce eliminator circuit will remove bounce on both the "make" and the "break" of a contact closure. The clock for operation of the MC14490 is derived from an internal R-C oscillator which requires only an external capacitor to adjust for the desired operating frequency (bounce delay). The clock may also be driven from an external clock source or the oscillator of another MC14490 (see Figure 5).

NOTE: Immediately after power-up, the outputs of the MC14490 are in indeterminate states.

  • Diode Protection on All Inputs
  • Six Debouncers Per Package
  • Internal Pullups on All Data Inputs
  • Can Be Used as a Digital Integrator, System Synchronizer, or Delay Line
  • Internal Oscillator (R-C), or External Clock Source
  • TTL Compatible Data Inputs/Outputs
  • Single Line Input, Debounces Both "Make" and "Break" Contacts
  • Does Not Require "Form C" (Single Pole Double Throw) Input Signal
  • Cascadable for Longer Time Delays
  • Schmitt Trigger on Clock Input (Pin 7)
  • Supply Voltage Range = 3.0 V to 18 V
  • Chip Complexity: 546 FETs or 136.5 Equivalent Gates
  • Pb-Free Packages are Available

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MC14490DWG

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Active

CAD Model

Pb

A

H

P

SOIC-16W

3

260

TUBE

47

N

Bounce Eliminator

3

18

320

0.5

9

$0.5236

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MC14490DWR2G

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Active

CAD Model

Pb

A

H

P

SOIC-16W

3

260

REEL

1000

N

Bounce Eliminator

3

18

320

0.5

9

$0.5051

More Details

NLV14490DWG

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Last Shipments

CAD Model

Pb

A

H

P

SOIC-16W

3

260

TUBE

47

N

Bounce Eliminator

3

18

320

0.5

9

Price N/A

More Details

NLV14490DWR2G

Loading...

Active

CAD Model

Pb

A

H

P

SOIC-16W

3

260

REEL

1000

N

Bounce Eliminator

3

18

320

0.5

9

$0.5031

More Details

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