Details

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BUY MM74C922N https://www.utsource.net/itm/p/6525315.html
N/A

Parameter	Description	Conditions	Min	Typ	Max	Unit
Supply Voltage (VCC)	Operating supply voltage range		4.5		5.5	V
Input Voltage (VIH, VIL)	High-level and Low-level input voltage					V
Output Current (IOH, IOL)	Output current for high and low output levels					mA
Power Dissipation	Total power dissipation	Ta = 25°C			600	mW
Operating Temperature	Ambient temperature range		-40		85	°C
Storage Temperature	Temperature range for storage		-65		150	°C
Input Leakage Current	Maximum leakage current at input pins	VI = 0V to VCC			1	μA
Propagation Delay Time	Time delay from input change to output response				15	ns

Instructions for MM74C922N

1. Power Supply Connection:

   • Connect VCC to a stable 5V power supply.
   • Ensure GND is properly grounded.

2. Input Configuration:

   • The device can interface with various keypads up to 4x4 matrix configurations.
   • Inputs should be debounced externally if necessary.

3. Output Handling:

   • Outputs are active low; connect pull-up resistors as needed.
   • Ensure the load connected to the outputs does not exceed the maximum specified output current.

4. Temperature Considerations:

   • Operate within the specified temperature range to avoid damage or unreliable operation.
   • For extended temperature ranges, ensure adequate heat dissipation mechanisms.

5. Signal Integrity:

   • Keep signal paths short and use proper PCB layout techniques to minimize noise and interference.
   • Use decoupling capacitors close to the power pins for stable operation.

6. Handling Precautions:

   • This device is sensitive to ESD; handle with appropriate precautions.
   • Avoid exceeding the absolute maximum ratings to prevent damage.

(For reference only)