Details

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BUY 74LS399 https://www.utsource.net/itm/p/6464837.html
2014-11-11

Parameter	Symbol	Min	Typ	Max	Unit
Supply Voltage	VCC	4.75	5.0	5.25	V
Input High Voltage	VIH	2.0	-	5.5	V
Input Low Voltage	VIL	0	-	0.8	V
Output High Voltage	VOH	2.4	-	5.0	V
Output Low Voltage	VOL	0	-	0.4	V
Input Current (High)	IIH	-20	-	400	渭A
Input Current (Low)	IIL	-1000	-	10	渭A
Output Current (High)	IOH	-400	-	-	渭A
Output Current (Low)	IOL	-	-	8	mA
Propagation Delay Time	tpd	15	-	35	ns
Power Dissipation	PD	-	-	100	mW
Operating Temperature Range	TA	-55	-	125	掳C
Storage Temperature Range	TSTG	-65	-	150	掳C

Instructions for Using 74LS399

1. Power Supply:

   • Connect V_CC to +5V and GND to 0V.
   • Ensure the power supply is stable and within the specified range to avoid damage.

2. Input Signals:

   • Apply logic high (V_IH) or low (V_IL) signals to the input pins.
   • Ensure the input voltages are within the specified limits to prevent incorrect operation or damage.

3. Output Signals:

   • The output pins will provide logic high (V_OH) or low (V_OL) signals.
   • Ensure the load connected to the output does not exceed the maximum output current ratings.

4. Propagation Delay:

   • The propagation delay time (t_pd) is the time it takes for the output to change state after the input changes.
   • Account for this delay in your timing calculations.

5. Temperature Considerations:

   • Operate the device within the specified operating temperature range (T_A).
   • Store the device within the specified storage temperature range (T_STG).

6. Power Dissipation:

   • Ensure the total power dissipation (P_D) does not exceed the maximum rating to avoid overheating and potential damage.

7. Handling:

   • Handle the device with care to avoid static discharge, which can damage the internal circuits.
   • Use proper anti-static precautions when handling and soldering the device.

8. Circuit Design:

   • Use appropriate decoupling capacitors (typically 0.1 渭F) between V_CC and GND close to the device to filter out noise and ensure stable operation.

9. Testing:

   • Test the device under controlled conditions to verify its functionality before integrating it into a larger system.

By following these instructions, you can ensure reliable and efficient operation of the 74LS399 IC.

(For reference only)