Details

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BUY SN74LS138NSR https://www.utsource.net/itm/p/11618517.html
IC DECODER/DEMUX 3-8LINE 16SO

Parameter	Symbol	Min	Typical	Max	Unit	Notes
Supply Voltage	VCC	4.75	-	5.25	V	Recommended operating range
Output High-Level Voltage	VOH	-	2.4	3.4	V	IO = -0.4 mA, VCC = 5V
Output Low-Level Voltage	VOL	0.0	0.1	0.25	V	IO = 8 mA, VCC = 5V
Input High-Level Voltage	VIH	2.0	-	5.0	V	Input high level voltage
Input Low-Level Voltage	VIL	0.0	-	0.8	V	Input low level voltage
Propagation Delay Time	tpd	16	-	36	ns	VCC = 5V, TA = 25°C
Power Dissipation	PD	-	-	500	mW	Maximum power dissipation per package
Operating Temperature Range	TA	-55	-	125	°C	Military grade (SN74S138)
Storage Temperature Range	TSTG	-65	-	150	°C	-
Input Current	II	-1.0	-	15	μA	Input current at VIL or VIH
Output Current (High)	IO(High)	-	-	-400	μA	Maximum output current when high
Output Current (Low)	IO(Low)	-	-	8	mA	Maximum output current when low

Instructions for Using SN74LS138NSR

1. Power Supply:

   • Ensure that the supply voltage (V_CC) is within the recommended range of 4.75V to 5.25V.
   • Connect the ground (GND) pin to a stable 0V reference.

2. Input Signals:

   • Apply logic high (V_IH) and low (V_IL) levels within the specified ranges.
   • Avoid applying voltages outside the input voltage limits to prevent damage to the device.

3. Output Signals:

   • The outputs can drive up to 8 mA when low and sink up to 400 μA when high.
   • Use appropriate pull-up resistors if driving high-impedance loads.

4. Propagation Delay:

   • The propagation delay time (t_pd) is crucial for timing considerations. Ensure that your design accounts for the maximum delay of 36 ns at room temperature.

5. Temperature Considerations:

   • The device is designed to operate over a wide temperature range (-55°C to 125°C). Ensure that the ambient temperature does not exceed these limits.

6. Storage:

   • Store the device in a controlled environment with temperatures between -65°C and 150°C to avoid degradation.

7. Handling:

   • Handle the device with care to avoid static discharge, which can damage the sensitive components.
   • Use proper ESD protection when handling the device.

8. Application:

   • The SN74LS138NSR is a 3-to-8 line decoder/demultiplexer. It can be used in various digital circuits where address decoding or signal routing is required.
   • Connect the enable pins (G1, G2A, G2B) and address inputs (A, B, C) according to your specific application requirements.

9. Testing:

   • Before integrating the device into a larger system, test it individually to ensure it meets the specified performance parameters.

10. Compliance:

    • Ensure that the device complies with all relevant safety and regulatory standards for your application.

(For reference only)