Details

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BUY 74LS257APC https://www.utsource.net/itm/p/12610375.html

Parameter	Symbol	Min	Typical	Max	Unit
Supply Voltage	Vcc	4.75	5.0	5.25	V
Output High Level Voltage	VOH	2.7	3.5	5.0	V
Output Low Level Voltage	VOL	0	0.4	0.5	V
Input High Level Voltage	VIH	2.0	3.5	5.0	V
Input Low Level Voltage	VIL	0	0.8	1.5	V
Propagation Delay Time (Typical)	tpd	-	12	-	ns
Power Dissipation	PD	-	100	-	mW
Operating Temperature Range	Topr	-40	-	85	掳C
Storage Temperature Range	Tstg	-65	-	150	掳C

Instructions for Use:

1. Power Supply:

   • Connect the Vcc pin to a 5V power supply.
   • Ground the GND pin.

2. Signal Levels:

   • Ensure that input signals meet the specified high and low voltage levels.
   • Output signals will be driven to the specified high and low voltage levels.

3. Propagation Delay:

   • The typical propagation delay time is 12 nanoseconds. This is the time it takes for a change in the input signal to affect the output signal.

4. Power Dissipation:

   • The device can dissipate up to 100 milliwatts of power. Ensure proper heat dissipation if operating near this limit.

5. Temperature Ranges:

   • The operating temperature range is from -40掳C to 85掳C.
   • The storage temperature range is from -65掳C to 150掳C.

6. Handling:

   • Handle the device with care to avoid static damage.
   • Follow standard ESD (Electrostatic Discharge) precautions when handling the component.

7. Soldering:

   • Use a soldering iron with a temperature no higher than 300掳C.
   • Ensure that the soldering process does not exceed 10 seconds per joint.

8. Testing:

   • Test the device under normal operating conditions to ensure it meets the specified parameters.
   • Use a multimeter or oscilloscope to verify input and output signal levels.

(For reference only)