SN74HC42DR datasheet by Texas Instruments

SN74HC42DR Frequently Asked Questions (FAQs)

• What is the maximum operating frequency of the SN74HC42DR?
  The maximum operating frequency of the SN74HC42DR is 25 MHz.
• Can I use the SN74HC42DR in a 5V system?
  Yes, the SN74HC42DR is compatible with 5V systems, but it's recommended to use a voltage regulator to ensure a stable 4.5V to 5.5V supply voltage.
• How do I handle the power-up and power-down sequences for the SN74HC42DR?
  It's recommended to power up the VCC pin first, followed by the input signals, and then the output enable (OE) pin. During power-down, reverse the sequence.
• What is the maximum current that the SN74HC42DR can sink or source?
  The SN74HC42DR can sink or source up to 25 mA per output pin.
• Can I use the SN74HC42DR in a high-temperature environment?
  The SN74HC42DR is rated for operation from -40°C to 85°C. However, it's recommended to derate the device's performance at higher temperatures to ensure reliability.