Details

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BUY SN74LS91N https://www.utsource.net/itm/p/12612128.html

Parameter	Symbol	Conditions	Min	Typ	Max	Unit
Supply Voltage	Vcc		4.75	5	5.25	V
Output Current (Source)	IOH	V = 2.4V		400		渭A
Output Current (Sink)	IOL	V = 2.4V		8		mA
Propagation Delay Time	tpd	Vcc = 5V, TA = 25掳C	16		34	ns
Power Dissipation	PD				500	mW
Operating Temperature	Topr		-55		125	掳C

Instructions for SN74LS91N:

1. Power Supply Connection:

   • Connect the supply voltage (Vcc) between 4.75V and 5.25V to pin 14.
   • Ground (GND) should be connected to pin 7.

2. Input Handling:

   • Ensure all inputs are either tied to GND or Vcc when not actively driven to prevent floating states which can lead to unpredictable behavior.

3. Output Load:

   • The device can source up to 400渭A and sink up to 8mA per output. Do not exceed these limits to avoid damage.

4. Propagation Delay:

   • For accurate timing applications, consider the propagation delay of 16 to 34 nanoseconds under standard operating conditions.

5. Thermal Considerations:

   • Keep power dissipation below 500mW to ensure reliable operation. Use appropriate heat sinking if necessary.

6. Operating Temperature Range:

   • The device is designed to operate reliably from -55掳C to 125掳C. Ensure environmental conditions do not exceed these limits.

7. Handling Precautions:

   • This component is sensitive to electrostatic discharge (ESD). Handle with care and use proper ESD protection measures.

8. Storage:

   • Store in a dry environment away from direct sunlight and extreme temperatures.

(For reference only)