M74HC21M1R datasheet by STMicroelectronics

M74HC21M1R Frequently Asked Questions (FAQs)

• What is the recommended operating voltage range for M74HC21M1R?
  The recommended operating voltage range for M74HC21M1R is 2V to 6V, with a typical voltage of 5V.
• How do I handle the input pins of M74HC21M1R when they are not in use?
  When the input pins of M74HC21M1R are not in use, they should be tied to VCC or GND through a resistor to prevent floating inputs and reduce power consumption.
• What is the maximum frequency of operation for M74HC21M1R?
  The maximum frequency of operation for M74HC21M1R is typically around 25 MHz, but it can vary depending on the specific application and operating conditions.
• How do I ensure that the M74HC21M1R is properly powered and decoupled?
  To ensure proper power and decoupling, use a 0.1uF ceramic capacitor between VCC and GND, and a 10uF electrolytic capacitor between VCC and GND, as close to the device as possible.
• What is the maximum output current that M74HC21M1R can sink or source?
  The maximum output current that M74HC21M1R can sink or source is typically around 20mA, but it can vary depending on the specific application and operating conditions.