Details

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BUY Logic integrated circuit 74HC138D https://www.utsource.net/itm/p/11533676.html
IC DECODER/DEMUX 3-8 LINE 16SOIC

Parameter	Symbol	Min	Typ	Max	Unit	Conditions
Supply Voltage	VCC	2.0	-	6.0	V	-
Input Low Voltage	VIL	-0.5	-	1.5	V	VCC = 4.5V to 5.5V
Input High Voltage	VIH	3.5	-	VCC + 0.5	V	VCC = 4.5V to 5.5V
Output Low Voltage	VOL	-0.5	0.1	0.2	V	IOL = 4mA, VCC = 4.5V to 5.5V
Output High Voltage	VOH	2.7	-	VCC - 0.2	V	IOH = -0.4mA, VCC = 4.5V to 5.5V
Input Leakage Current	IIL	-1	-	1	渭A	VCC = 0 to 6V
Output Leakage Current	IOL	-50	-	50	渭A	VCC = 0 to 6V
Propagation Delay Time	tpd	-	18	38	ns	VCC = 4.5V to 5.5V, fo = 10MHz
Power Dissipation	PD	-	-	100	mW	VCC = 4.5V to 5.5V, TA = 25掳C

Instructions for Using 74HC138D:

1. Power Supply:

   • Connect V_CC to the positive supply (2.0V to 6.0V) and GND to ground.

2. Enable Inputs:

   • The 74HC138D has three enable inputs: G1, G2A, and G2B.
   • For normal operation, G1 should be HIGH, and both G2A and G2B should be LOW.

3. Address Inputs:

   • The address inputs A0, A1, and A2 select one of the eight outputs (Y0 to Y7).
   • The output corresponding to the binary value of A0, A1, and A2 will be LOW, while all others will be HIGH.

4. Output States:

   • When any of the enable inputs are not in the correct state (G1 LOW, G2A HIGH, or G2B HIGH), all outputs will be HIGH.
   • Only one output is active (LOW) at any given time, based on the address inputs.

5. Propagation Delay:

   • The propagation delay time (t_pd) is the time it takes for the output to change after the input changes. It is typically 18 to 38 nanoseconds.

6. Handling:

   • The 74HC138D is sensitive to electrostatic discharge (ESD). Use proper handling procedures to avoid damage.

7. Operating Temperature:

   • The device is designed to operate over a wide temperature range, typically from -40掳C to 85掳C.

8. Storage:

   • Store the device in a dry, ESD-protected environment to prevent damage.

9. Testing:

   • Before using the device in a circuit, test it with a simple setup to ensure it functions correctly.

10. Schematic Example:

    • Connect the enable inputs as described, and use resistors to pull the outputs to a known state (e.g., HIGH) when they are not active.

By following these instructions, you can effectively integrate the 74HC138D into your digital circuits for various applications such as memory addressing, data routing, and more.

(For reference only)