Details

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BUY SN74LS645N. https://www.utsource.net/itm/p/12610005.html

Parameter	Symbol	Min	Typ	Max	Unit	Notes
Supply Voltage	VCC	4.75	5.0	5.25	V	-
Input Voltage (Low)	VIL	0.0	-	0.8	V	-
Input Voltage (High)	VIH	2.0	-	VCC	V	-
Output Voltage (Low)	VOL	0.0	0.4	0.5	V	IOL = 16 mA
Output Voltage (High)	VOH	2.4	2.7	VCC - 0.5	V	IOH = -0.4 mA
Input Current (Low)	IIL	-0.4	-	-1.0	mA	-
Input Current (High)	I<subIH	15	-	40	渭A	-
Output Current (Low)	IOL	8	-	16	mA	-
Output Current (High)	IOH	-0.4	-	-0.8	mA	-
Propagation Delay Time	tpd	-	13	22	ns	-
Power Dissipation	PD	-	-	100	mW	Per package
Operating Temperature	TA	-55	-	125	掳C	-
Storage Temperature	TSTG	-65	-	150	掳C	-

Instructions for Use:

1. Power Supply:

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

2. Input Signals:

   • Apply input signals within the valid logic levels:
     • Low: 0.0V to 0.8V
     • High: 2.0V to V_CC
   • Ensure input currents do not exceed the maximum ratings.

3. Output Signals:

   • The output voltages will be:
     • Low: 0.0V to 0.5V when sinking up to 16mA
     • High: 2.4V to V_CC - 0.5V when sourcing up to -0.4mA
   • Do not exceed the maximum output current ratings.

4. Propagation Delay:

   • Account for the propagation delay time (t_pd) of 13 to 22 nanoseconds in your timing calculations.

5. Thermal Management:

   • Ensure the device does not exceed the maximum power dissipation of 100mW per package.
   • Operate the device within the temperature range of -55掳C to 125掳C.

6. Storage:

   • Store the device in a controlled environment with temperatures between -65掳C and 150掳C.

7. Handling:

   • Handle the device with care to avoid static damage.
   • Follow proper soldering techniques to ensure reliable connections.

(For reference only)