Details

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BUY SN74F138N https://www.utsource.net/itm/p/11690272.html
IC 3-8 LINE DEC/DEMUX 16-DIP

Parameter	Symbol	Conditions	Min	Typical	Max	Unit
Supply Voltage	VCC	-	4.75	-	5.25	V
Input Low Voltage	VIL	-	0.8	-	-	V
Input High Voltage	VIH	-	-	-	2.0	V
Output Low Voltage	VOL	IOL = 16 mA	0.4	-	-	V
Output High Voltage	VOH	IOH = -0.4 mA	-	-	2.4	V
Input Leakage Current	IIL	VCC = 5V	-1.0	-	1.0	μA
Output Leakage Current	IOL	VCC = 5V, VO = 0V	-50	-	50	μA
Propagation Delay Time	tpd	VCC = 5V, TA = 25°C	15	-	22	ns
Power Dissipation	PD	-	-	-	500	mW

Instructions for Use:

1. Power Supply:

   • Ensure the supply voltage (V_CC) is within the range of 4.75V to 5.25V.
   • Connect the ground (GND) pin to the system ground.

2. Input Signals:

   • Apply input signals such that the low level (V_IL) is less than or equal to 0.8V and the high level (V_IH) is greater than or equal to 2.0V.
   • Avoid floating inputs; use pull-up or pull-down resistors if necessary.

3. Output Signals:

   • The output low voltage (V_OL) should not exceed 0.4V when sourcing up to 16mA.
   • The output high voltage (V_OH) should be at least 2.4V when sinking up to 0.4mA.

4. Current Handling:

   • Do not exceed the maximum output current ratings to avoid damage to the device.
   • The output leakage current (I_OL) should be within ±50μA.

5. Timing Considerations:

   • The propagation delay time (t_pd) is typically between 15ns and 22ns at room temperature (25°C).

6. Thermal Management:

   • Ensure proper heat dissipation if the power dissipation (P_D) approaches 500mW.
   • Use a heatsink if necessary, especially in high-power applications.

7. Handling and Storage:

   • Handle the device with care to avoid static discharge, which can damage the IC.
   • Store the device in a dry, cool place away from direct sunlight and moisture.

8. Testing:

   • Before integrating the SN74F138N into a circuit, test it on a breadboard to ensure it functions correctly.
   • Use a multimeter to verify voltages and currents at the pins.

9. Schematic and Layout:

   • Refer to the datasheet for the pin configuration and recommended PCB layout.
   • Keep signal traces short and direct to minimize noise and interference.

10. Compliance:

    • Ensure that the design complies with relevant safety and regulatory standards.

For more detailed information, refer to the official Texas Instruments datasheet for the SN74F138N.

(For reference only)