Details

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BUY SN74LS399N https://www.utsource.net/itm/p/1702012.html
QUADRUPLE 2-INPUT MULTIPLEXERS WITH STORAGE

Parameter	Description	Min	Typ	Max	Unit
VCC	Supply Voltage	4.75	5.0	5.25	V
ICC	Supply Current (per package)	-	16	-	mA
VIH	Input High Level Voltage	2.0	-	VCC	V
VIL	Input Low Level Voltage	0	-	0.8	V
VOH	Output High Level Voltage	2.7	-	VCC - 0.5	V
VOL	Output Low Level Voltage	0	-	0.5	V
IOH	Output High Level Current	-	-0.4	-	mA
IOL	Output Low Level Current	-	8	-	mA
tpd	Propagation Delay Time	-	22	-	ns
tphl	High-to-Low Propagation Delay Time	-	22	-	ns
tplh	Low-to-High Propagation Delay Time	-	22	-	ns
tskew	Skew	-	6	-	ns
tCO	Clock to Output Delay Time	-	22	-	ns
tSU	Setup Time	-	20	-	ns
tH	Hold Time	-	10	-	ns

Instructions for Using SN74LS399N:

1. Power Supply:

   • Connect V_CC to +5V and GND to ground.
   • Ensure the supply voltage is within the specified range (4.75V to 5.25V).

2. Input Levels:

   • For a logic high input, apply a voltage between 2.0V and V_CC.
   • For a logic low input, apply a voltage between 0V and 0.8V.

3. Output Levels:

   • The output high level voltage will be between 2.7V and V_CC - 0.5V.
   • The output low level voltage will be between 0V and 0.5V.

4. Current Ratings:

   • The output can source up to -0.4mA and sink up to 8mA.
   • The total supply current should not exceed 16mA per package.

5. Timing Parameters:

   • Ensure that setup and hold times are met to avoid metastability issues.
   • The propagation delay time (t_pd) is typically 22ns.
   • The clock to output delay time (t_CO) is also 22ns.

6. Clock Operation:

   • The device operates on a positive-edge-triggered clock signal.
   • Ensure the clock signal is clean and meets the required timing specifications.

7. Storage and Handling:

   • Store the device in a dry, static-free environment.
   • Handle with care to avoid damage to the pins and internal components.

8. Application Notes:

   • The SN74LS399N is commonly used in data storage and shift register applications.
   • Refer to the datasheet for detailed application circuits and additional information.

(For reference only)