Details

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BUY 74HC244 https://www.utsource.net/itm/p/12403243.html

Parameter	Symbol	Conditions	Min	Typ	Max	Unit
Supply Voltage	VCC	Operating	2.0	-	6.0	V
Input Low Voltage	VIL	VCC = 5V	-	1.5	-	V
Input High Voltage	VIH	VCC = 5V	-	3.5	-	V
Output Low Voltage	VOL	IOL = 4mA	-	0.1	0.4	V
Output High Voltage	VOH	IOH = -4mA	2.4	4.9	-	V
Input Leakage Current	IIL	VCC = 5V	-1	-	1	渭A
Output Sink Current	IOL	VCC = 5V	-	-	25	mA
Output Source Current	IOH	VCC = 5V	-	-	-25	mA
Propagation Delay Time	tpd	VCC = 5V, TA = 25掳C	-	8	18	ns
Power Dissipation	Ptot	TA = 25掳C	-	-	100	mW
Operating Temperature	TA	Commercial Grade	0	-	70	掳C
Storage Temperature	TSTG	-	-40	-	125	掳C

Instructions for Using 74HC244:

1. Power Supply:

   • Connect V_CC to the positive supply (2.0V to 6.0V) and GND to the ground.
   • Ensure the supply voltage is stable to avoid erratic behavior.

2. Input Signals:

   • Apply input signals within the specified voltage range (V_IL to V_IH).
   • Inputs should not exceed V_CC or go below GND to prevent damage.

3. Output Signals:

   • Outputs can drive loads up to 25mA sink or source current.
   • Use appropriate pull-up or pull-down resistors if necessary to ensure proper logic levels.

4. Propagation Delay:

   • Consider the propagation delay (t_pd) when designing timing-sensitive circuits.
   • Typical delay is 8ns at 5V and 25掳C, with a maximum of 18ns.

5. Temperature Considerations:

   • Operate the device within the specified temperature range (0掳C to 70掳C for commercial grade).
   • Store the device between -40掳C and 125掳C to ensure reliability.

6. Handling Precautions:

   • Handle the IC with care to avoid static discharge, which can damage the device.
   • Use anti-static wrist straps and mats when handling sensitive components.

7. Layout and Mounting:

   • Ensure proper PCB layout to minimize noise and interference.
   • Place decoupling capacitors close to the power pins to filter out noise.

8. Testing:

   • Test the IC under typical operating conditions to verify functionality.
   • Use a multimeter or oscilloscope to check input and output voltages.

By following these guidelines, you can effectively use the 74HC244 octal buffer/line driver in your digital circuits.

(For reference only)