Details

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BUY 74HC138N https://www.utsource.net/itm/p/12598601.html

Parameter	Symbol	Min	Typ	Max	Unit	Conditions
Supply Voltage	VCC	2.0	-	6.0	V	-
Input Low Voltage	VIL	0.0	-	1.5	V	VCC = 4.5V to 5.5V
Input High Voltage	VIH	3.15	-	VCC	V	VCC = 4.5V to 5.5V
Output Low Voltage (Sink)	VOL	0.0	0.1	0.2	V	IOL = 4mA, VCC = 4.5V to 5.5V
Output High Voltage (Source)	VOH	4.5	4.9	VCC	V	IOH = -0.4mA, VCC = 4.5V to 5.5V
Input Leakage Current	IIL	-1.0	-	1.0	渭A	VCC = 0 to 6V
Output Leakage Current	IOL	-1.0	-	1.0	渭A	VCC = 0 to 6V, Output High
Output Sink Current	IOL	-8	-	-16	mA	VOL = 0.4V, VCC = 4.5V to 5.5V
Output Source Current	IOH	-0.4	-	-1.0	mA	VOH = 2.4V, VCC = 4.5V to 5.5V
Propagation Delay Time	tpd	-	13	-	ns	VCC = 4.5V to 5.5V, TA = 25掳C
Power Dissipation	PD	-	-	100	mW	Per Package, TA = 25掳C
Operating Temperature Range	TA	-40	-	85	掳C	-

Instructions for Using 74HC138N:

1. Power Supply:

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

2. Enable Inputs:

   • The 74HC138N has three enable inputs: G1, G2A, and G2B.
   • To enable the decoder, set G1 high and both G2A and G2B low.
   • If any of these conditions are not met, all outputs will be high (disabled).

3. Address Inputs:

   • The 74HC138N has three address inputs: A, B, and C.
   • These inputs determine which of the eight outputs will be active low (0) when the decoder is enabled.

4. Output Selection:

   • The output corresponding to the binary value of the address inputs (A, B, C) will be low (0) when the decoder is enabled.
   • All other outputs will be high (1).

5. Output Current:

   • Ensure that the load connected to the outputs does not exceed the maximum sink or source current ratings.
   • For example, each output can sink up to 16mA and source up to 1mA.

6. Propagation Delay:

   • The propagation delay time (t_pd) is the time it takes for the output to change state after the input changes.
   • This is typically around 13ns at room temperature and with a supply voltage of 4.5V to 5.5V.

7. Temperature Considerations:

   • The device is designed to operate within a temperature range of -40掳C to 85掳C.
   • Ensure that the operating environment does not exceed these limits to avoid damage or unreliable operation.

8. Handling Precautions:

   • Handle the IC with care to avoid static discharge, which can damage the device.
   • Use proper anti-static measures when handling and storing the IC.

By following these instructions, you can effectively use the 74HC138N 3-to-8 line decoder in your circuits.

(For reference only)