MC14490DW

The MC14490DW is one of the MC14490 series.The MC14490DW 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 RC oscillator, MC14490DW 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).

Features of the MC14490DW are:(1)Diode Protection on All Inputs; (2)Six Debouncers Per Package; (3)Internal Pullups on All Data Inputs; (4)Can Be Used as a Digital Integrator, System Synchronizer, or Delay Line; (5)Internal Oscillator (RC), or External Clock Source; (6)TTL Compatible Data Inputs/Outputs; (7)Single Line Input, Debounces Both "Make" and "Break" Contacts; (8)Does Not Require "Form C" (Single Pole Double Throw) Input Signal; (9)Cascadable for Longer Time Delays; (10)Schmitt Trigger on Clock Input (Pin 7); (11)Supply Voltage Range = 3.0 V to 18 V; (12)Chip Complexity: 546 FETs or 136.5 Equivalent Gates.

The absolute maximum ratings of the MC14490DW can be summarized as:(1)DC Supply Voltage Range: 0.5 to +18.0 V; (2)Input or Output Voltage Range(DC or Transient):0.5 to VDD + 0.5 V; (3)Input Current(DC or Transient) per Pin:±10 mA; (4)Power Dissipation,per Package :500 mW; (5)Ambient Temperature Range: 55 to +125 °C; (6)Storage Temperature Range :65 to +150 °C; (7)Lead Temperature(8Second Soldering):260 °C.If you want to know more information about MC14490DW such as the electrical characteristics, please download the datasheet in www.seekic.com or www.chinaicmart.com.