74LS257AN: Pilihan Utama di United States (USA) Utsource Holding Company Limited

Penerangan

Parameter	Symbol	Conditions	Min	Typ	Max	Unit
Supply Voltage	Vcc	Operating	4.75		5.25	V
Input Low Voltage	VIL	IIL = 1.6 mA		0.8		V
Input High Voltage	VIH	IIH = 20 μA	2.0			V
Output Low Voltage	VOL	IO = 16 mA		0.4		V
Output High Voltage	VOH	IO = -0.4 mA		2.4		V
Propagation Delay Time	tpLH	VCC = 5V, TA = 25°C		13		ns
Propagation Delay Time	tpHL	VCC = 5V, TA = 25°C		13		ns
Power Dissipation	PD			150		mW
Operating Temperature Range	Toper	Storage	-55		125	°C

Power Supply: Ensure the supply voltage (Vcc) is within the specified range of 4.75V to 5.25V to avoid damage or improper operation.
Input Levels: The device recognizes inputs as low when below 0.8V and high when above 2.0V. Design circuits ensuring input signals meet these criteria.
Output Levels: For reliable interfacing, ensure that connected devices can operate with output voltages not exceeding 0.4V for a low state and at least 2.4V for a high state.
Timing Considerations: Account for propagation delays in timing-sensitive applications. Both rising and falling edge delays are typically around 13 nanoseconds.
Thermal Management: Keep power dissipation within limits to prevent overheating. Maximum continuous power dissipation is 150mW.
Temperature Range: Operate within the temperature range of -55°C to 125°C for reliable performance.
Handling Care: Handle with care to prevent electrostatic discharge (ESD) damage. Use appropriate ESD protection measures during handling and installation.

For detailed specifications and application notes, refer to the official datasheet provided by the manufacturer.

(For reference only)