The maximum frequency of operation for the CD74HC4515M is 25 MHz.
To ensure proper power sequencing, apply power to the VCC pin before applying a signal to the input pins. Also, ensure that the input signals are stable before applying power to the VCC pin.
The recommended operating voltage range for the CD74HC4515M is 2V to 6V.
Unused inputs on the CD74HC4515M should be tied to a valid logic level (either VCC or GND) to prevent floating inputs and ensure proper device operation.
The maximum output current for the CD74HC4515M is 25 mA per output pin.
CD74HC4515M datasheet
by Texas Instruments
