Details

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BUY SN74HC138NSR https://www.utsource.net/itm/p/12536032.html

Parameter	Symbol	Conditions	Min	Typ	Max	Unit
Supply Voltage	VCC		2.0		6.0	V
Output Low Voltage	VOL	IOH = -4mA	0.1		0.4	V
Output High Voltage	VOH	IOL = 8mA	2.4		VCC-0.5	V
Input Leakage Current	IIL	VIN = 0V or VCC	-1		1	μA
Output Leakage Current	IOL	VO = 0V or VCC	-1		1	μA
Propagation Delay Time	tpdel	VCC = 4.5V to 5.5V		13	22	ns
Power Dissipation	PD	TA = 25°C		100		mW
Operating Temperature	Topr		-40		85	°C

Instructions for SN74HC138NSR

1. Power Supply:

   • Ensure the supply voltage (VCC) is within the specified range of 2.0V to 6.0V.

2. Input Handling:

   • The input leakage current should be monitored; ensure it remains within ±1μA.
   • Inputs should not exceed the supply voltage levels to avoid damage.

3. Output Handling:

   • For reliable operation, output low voltage (VOL) should ideally be kept under 0.4V when sourcing up to -4mA.
   • Output high voltage (VOH) should be at least VCC-0.5V when sinking up to 8mA.

4. Propagation Delay:

   • The typical propagation delay time (tpdel) is 13ns under standard conditions (VCC = 4.5V to 5.5V).

5. Thermal Considerations:

   • Operate the device within the temperature range of -40°C to 85°C to ensure stability and longevity.
   • Keep power dissipation below 100mW at room temperature (25°C).

6. Application Notes:

   • This device is a 1-of-8 decoder/demultiplexer suitable for data routing and address decoding in digital systems.
   • Ensure proper decoupling capacitors are placed close to the VCC and GND pins to reduce noise and transient effects.

(For reference only)