Overview
The MC14490DWG, produced by onsemi, is a Hex Contact Bounce Eliminator integrated circuit. It is constructed with complementary MOS enhancement mode devices and is designed to eliminate extraneous level changes that occur when interfacing with mechanical contacts. The circuit takes an input signal from a bouncing contact and generates a clean digital signal four clock periods after the input has stabilized, effectively removing bounce on both the 'make' and 'break' of a contact closure. The device operates using an internal R-C oscillator, which can be adjusted with an external capacitor, or it can be driven by an external clock source or the oscillator of another MC14490.
Key Specifications
| Parameter | Symbol | Value | Unit |
|---|---|---|---|
| DC Supply Voltage Range | VDD | -0.5 to +18.0 | V |
| Input or Output Voltage Range (DC or Transient) | Vin, Vout | -0.5 to VDD + 0.5 | V |
| Input Current (DC or Transient) per Pin | Iin | ±10 | mA |
| Power Dissipation, per Package | PD | 500 | mW |
| Ambient Temperature Range | TA | -55 to +125 | °C |
| Storage Temperature Range | Tstg | -65 to +150 | °C |
| Lead Temperature (8-Second Soldering) | TL | 260 | °C |
| Maximum Propagation Delay | t_pd Max | 320 | ns |
| Maximum Output Current | I_O Max | 9 | mA |
| Package Type | SOIC-16W |
Key Features
- 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 and RoHS Compliant
Applications
The MC14490DWG is suitable for various applications where mechanical contacts are involved and clean digital signals are required. These include:
- Industrial control systems where reliable switching is crucial.
- Automotive systems, especially those requiring AEC-Q100 qualification.
- Consumer electronics that use push-button or switch inputs.
- Medical devices requiring precise and stable input signals.
- Any system needing to eliminate contact bounce and ensure stable digital outputs.
Q & A
- What is the primary function of the MC14490DWG?
The MC14490DWG is a Hex Contact Bounce Eliminator, designed to eliminate extraneous level changes resulting from mechanical contact bounces.
- What types of contacts does the MC14490DWG debounce?
The device debounces both 'make' and 'break' contacts.
- Can the MC14490DWG be used with external clock sources?
- What is the supply voltage range for the MC14490DWG?
The supply voltage range is from 3.0 V to 18 V.
- Is the MC14490DWG RoHS compliant?
- How many debouncers are included in the MC14490DWG package?
The package includes six debouncers.
- Does the MC14490DWG require 'Form C' (Single Pole Double Throw) input signals?
No, it does not require 'Form C' input signals.
- Can the MC14490DWG be cascaded for longer time delays?
- What is the maximum propagation delay of the MC14490DWG?
The maximum propagation delay is 320 ns.
- What is the maximum output current of the MC14490DWG?
The maximum output current is 9 mA.
- What is the package type of the MC14490DWG?
The package type is SOIC-16W.
