HEF4538: Top Choice in United States (USA) Utsource Holding Company Limited

Description

Parameter	Symbol	Min	Typ	Max	Unit	Description
Supply Voltage	VDD	3		18	V	Operating voltage range
Input Low Voltage	VIL	0		0.8	V	Maximum input low voltage level
Input High Voltage	VIH	2		VDD	V	Minimum input high voltage level
Output Low Voltage	VOL	0		0.4	V	Maximum output low voltage level
Output High Voltage	VOH	2.4		VDD	V	Minimum output high voltage level
Propagation Delay Time	tpd		60		ns	Typical propagation delay time
Power Dissipation	PD		50		mW	Maximum power dissipation per package
Operating Temperature Range	TOPR	-40		85	°C	Operating temperature range

Power Supply Connection:
- Connect the VDD pin to a supply voltage between 3V and 18V.
- Ensure proper decoupling capacitors are placed close to the power pins to reduce noise.
Input Signal Levels:
- Inputs should be driven by signals that respect the VIL and VIH levels to ensure reliable operation.
- Avoid floating inputs; they should be tied to either VDD or GND when not in use.
Output Handling:
- Outputs can drive loads within the specified VOH and VOL limits.
- Ensure the load connected to the output does not exceed the maximum current rating of the device.
Propagation Delay:
- Account for the typical propagation delay (tpd) in timing calculations for synchronous circuits.
Thermal Considerations:
- Monitor the operating temperature to ensure it stays within the specified range (-40°C to +85°C).
- If necessary, provide adequate heat sinking to manage power dissipation.
Handling Precautions:
- The HEF4538 is sensitive to electrostatic discharge (ESD). Use appropriate ESD protection measures during handling and installation.
- Follow good soldering practices to avoid damage from excessive heat.

(For reference only)