Environmentally Conscious and Economically Sound Machine Dismantling Forum > Madison, WI
> Antiques
> Cast Iron Machines
> 1 x MC14490P - motorola hex contact bounce eliminator
1 x MC14490P - motorola hex contact bounce eliminator
1 x MC14490P - MOTOROLA HEX CONTACT BOUNCE ELIMINATOR
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
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
DATASHEET - http://www.datasheetcatalog.org/datasheet/motorola/MC14490P.pdf
