Details

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BUY TC74VHC20F https://www.utsource.net/itm/p/1858024.html
DUAL 4-INPUT NAND GATE

Parameter	Symbol	Conditions	Min	Typ	Max	Unit
Supply Voltage	VCC		2.0		5.5	V
Input Low Voltage	VIL	VCC = 4.5V		0.8		V
Input High Voltage	VIH	VCC = 4.5V		2.7		V
Output Low Voltage	VOL	IO = 4mA, VCC = 4.5V		0.1		V
Output High Voltage	VOH	IO = -4mA, VCC = 4.5V		4.4		V
Propagation Delay Time	tpd	VCC = 4.5V, TA = 25°C		6		ns
Power Dissipation	PD	Per Package			150	mW
Operating Temperature	TA		-40		85	°C

Instructions for TC74VHC20F

1. Power Supply Requirements:

   • Ensure the supply voltage (VCC) is within the range of 2.0V to 5.5V.
   • The device should not be powered outside this range to avoid damage.

2. Input Signal Levels:

   • For proper recognition of logic levels, ensure input signals meet the specified low (VIL) and high (VIH) voltage thresholds relative to the supply voltage.

3. Output Signal Levels:

   • Verify that the output voltages (VOH and VOL) are within acceptable limits under load conditions as specified in the table.

4. Propagation Delay:

   • Account for the propagation delay (tpd) when designing timing-sensitive circuits. This parameter affects the speed at which signals travel through the device.

5. Thermal Considerations:

   • Operate within the specified temperature range (-40°C to 85°C).
   • Manage power dissipation (PD) to prevent overheating, especially in densely populated PCBs or high ambient temperatures.

6. Handling Precautions:

   • Handle with care to avoid electrostatic discharge (ESD), which can damage sensitive components.
   • Follow standard ESD protection practices during assembly and handling.

7. Application Notes:

   • Refer to the manufacturer’s application notes for detailed guidelines on layout, decoupling, and other design considerations to ensure optimal performance.

(For reference only)