Overview
The MC14490DWR2G, produced by onsemi, is a Hex Contact Bounce Eliminator integrated circuit designed to eliminate extraneous level changes resulting from mechanical contact bounces. Constructed with complementary MOS enhancement mode devices, this IC is highly versatile and can be used in various applications requiring clean digital signals from mechanical contacts. It features an internal R-C oscillator and can be driven by an external clock source, making it adaptable to different system requirements.
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 |
| Output Rise Time | tTLH | 65 to 360 | ns |
| Output Fall Time | tTHL | 40 to 200 | ns |
| Propagation Delay Time | tPHL, tPLH | 95 to 740 | ns |
| Clock Frequency (50% Duty Cycle) | fcl | 1.4 to 9 | MHz |
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
- Pb-Free and RoHS Compliant
- NLV Prefix for Automotive and Other Applications Requiring Unique Site and Control Change Requirements; AEC-Q100 Qualified and PPAP Capable
Applications
The MC14490DWR2G is suitable for various applications where clean digital signals are required from mechanical contacts. It is particularly useful in systems that involve switches, relays, and other mechanical contacts that can produce bounce. Some typical applications include:
- Industrial control systems
- Automotive systems
- Medical devices
- Consumer electronics
- Any system requiring debouncing of mechanical contacts
Q & A
- What is the primary function of the MC14490DWR2G?
The primary function of the MC14490DWR2G is to eliminate extraneous level changes resulting from mechanical contact bounces, providing a clean digital signal. - What types of inputs can the MC14490DWR2G handle?
The MC14490DWR2G can handle single line inputs and debounces both “make” and “break” contacts without requiring a “Form C” (Single Pole Double Throw) input signal. - What is the supply voltage range for the MC14490DWR2G?
The supply voltage range for the MC14490DWR2G is from 3.0 V to 18 V. - Can the MC14490DWR2G be used with an external clock source?
Yes, the MC14490DWR2G can be used with an external clock source in addition to its internal R-C oscillator. - How many debouncers are included in the MC14490DWR2G package?
The MC14490DWR2G includes six debouncers per package. - Is the MC14490DWR2G compatible with TTL logic?
Yes, the MC14490DWR2G is TTL compatible on both the inputs and the outputs. - What is the purpose of the internal pullup resistors on the MC14490DWR2G?
The internal pullup resistors on the MC14490DWR2G are used to ensure that the inputs are pulled up to the supply voltage when not driven, which is particularly useful for mechanical contacts. - Can the MC14490DWR2G be cascaded for longer time delays?
Yes, the MC14490DWR2G can be cascaded to achieve longer time delays if needed. - Is the MC14490DWR2G RoHS compliant?
Yes, the MC14490DWR2G is Pb-Free and RoHS compliant. - What is the significance of the NLV prefix for the MC14490DWR2G?
The NLV prefix indicates that the device is suitable for automotive and other applications requiring unique site and control change requirements; it is AEC-Q100 qualified and PPAP capable.
