Details

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BUY SN74LS251N https://www.utsource.net/itm/p/11694020.html
IC 8-IN DATASELCT/MUX 3ST 16DIP

Parameter	Symbol	Min	Typ	Max	Unit
Supply Voltage	VCC	4.75	-	5.25	V
Output High Level Voltage	VOH	-	2.4	3.4	V
Output Low Level Voltage	VOL	0.0	0.4	0.5	V
Input High Level Voltage	VIH	2.0	-	5.25	V
Input Low Level Voltage	VIL	0.0	-	0.8	V
Input Current (High)	IIH	-	20	40	μA
Input Current (Low)	IIL	-1.0	-	-	mA
Output Current (Source)	IOH	-	400	800	μA
Output Current (Sink)	IOL	-8	-	-	mA
Propagation Delay Time	tpd	16	-	34	ns
Power Dissipation	PD	-	-	100	mW
Operating Temperature Range	TA	0	-	70	°C
Storage Temperature Range	TSTG	-65	-	150	°C

Instructions for Using SN74LS251N:

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 common ground of your circuit.

2. Input Signals:

   • The input signals should be within the valid logic levels:
     • High level (V_IH): 2.0V to 5.25V
     • Low level (V_IL): 0.0V to 0.8V

3. Output Signals:

   • The output signals will be:
     • High level (V_OH): 2.4V to 3.4V
     • Low level (V_OL): 0.0V to 0.5V

4. Current Ratings:

   • Ensure that the input currents do not exceed:
     • High level (I_IH): 20μA to 40μA
     • Low level (I_IL): -1.0mA
   • Ensure that the output currents do not exceed:
     • Source current (I_OH): 400μA to 800μA
     • Sink current (I_OL): -8mA

5. Propagation Delay:

   • The propagation delay time (t_pd) is between 16ns and 34ns. This is the time it takes for the output to change after the input changes.

6. Power Dissipation:

   • The maximum power dissipation (P_D) is 100mW. Ensure that the device does not exceed this limit to avoid overheating.

7. Temperature Ranges:

   • Operating temperature (T_A): 0°C to 70°C
   • Storage temperature (T_STG): -65°C to 150°C

8. Handling:

   • Handle the IC with care to avoid static damage. Use proper ESD protection when handling the device.

9. Application:

   • The SN74LS251N is an 8-line to 1-line data selector/multiplexer. It can be used to select one of eight input lines to be passed to the output based on the control inputs (A, B, C).

10. Pin Configuration:

    • Refer to the datasheet for the specific pin configuration and connections. Ensure all pins are connected correctly to avoid damage to the IC.

By following these parameters and instructions, you can ensure reliable operation of the SN74LS251N in your circuit.

(For reference only)