Details

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BUY CD74HCT299E https://www.utsource.net/itm/p/606553.html
High Speed CMOS Logic 8-Bit Universal Shift Register; Three-State

Parameter	Symbol	Conditions	Min	Typical	Max	Unit
Supply Voltage	VCC	Operating	2.0	-	6.0	V
Input Low Voltage	VIL	VCC = 5V	0.8	-	-	V
Input High Voltage	VIH	VCC = 5V	-	-	3.5	V
Output Low Voltage	VOL	IOL = 4mA, VCC = 5V	0.1	-	-	V
Output High Voltage	VOH	IOH = -0.4mA, VCC = 5V	-	-	4.9	V
Input Leakage Current	IIL	VCC = 5V	-1.0	-	1.0	μA
Output Leakage Current	IOL	VCC = 5V	-100	-	100	nA
Propagation Delay Time	tpd	VCC = 5V, TA = 25°C	-	10	-	ns
Power Dissipation	PTOT	Per Package	-	-	500	mW

Instructions for Use

1. Supply Voltage (V_CC):

   • The CD74HCT299E operates within a supply voltage range of 2.0V to 6.0V. Ensure the power supply is stable within this range.

2. Input Voltages (V_IL, V_IH):

   • For reliable operation, input low voltages should not exceed 0.8V when V_CC is 5V.
   • Input high voltages should be at least 3.5V when V_CC is 5V.

3. Output Voltages (V_OL, V_OH):

   • When sourcing current (I_OL = 4mA), the output low voltage should not exceed 0.1V.
   • When sinking current (I_OH = -0.4mA), the output high voltage should be at least 4.9V.

4. Leakage Currents (I_IL, I_OL):

   • Input leakage current should be between -1.0μA and 1.0μA.
   • Output leakage current should be between -100nA and 100nA.

5. Propagation Delay (t_pd):

   • The typical propagation delay time is 10ns at V_CC = 5V and ambient temperature (TA) = 25°C.

6. Power Dissipation (P_TOT):

   • The maximum power dissipation for the package is 500mW. Ensure proper heat dissipation if operating near this limit.

7. Handling Precautions:

   • Handle the device with care to avoid static damage.
   • Ensure all connections are secure and correct to prevent short circuits or damage to the device.

8. Storage and Operating Temperature:

   • Store the device in a dry environment to prevent moisture damage.
   • The operating temperature range is typically from -40°C to +85°C. Ensure the device operates within this range to avoid thermal stress.

9. Schematic Design:

   • Connect the V_CC pin to the positive supply and GND to the ground.
   • Use appropriate decoupling capacitors (e.g., 0.1μF) close to the V_CC and GND pins to filter out noise.

10. Testing and Debugging:

    • Verify the supply voltage and all input signals before applying power.
    • Use a multimeter or oscilloscope to check output levels and timing characteristics during testing.

By following these guidelines, you can ensure reliable and efficient operation of the CD74HCT299E.

(For reference only)