M74HC161B1R datasheet by STMicroelectronics

M74HC161B1R Frequently Asked Questions (FAQs)

• What is the maximum clock frequency that can be used with the M74HC161B1R?
  The maximum clock frequency for the M74HC161B1R is 25 MHz, but it can vary depending on the operating voltage and temperature. It's recommended to check the AC characteristics table in the datasheet for more information.
• How do I ensure that the counter is properly reset during power-up?
  To ensure proper reset during power-up, connect the MR (Master Reset) pin to a pull-up resistor and a capacitor to VCC. This will ensure that the counter is reset when the power is applied.
• What is the recommended operating voltage range for the M74HC161B1R?
  The recommended operating voltage range for the M74HC161B1R is 2V to 6V, with a typical operating voltage of 5V.
• Can I use the M74HC161B1R as a synchronous counter?
  Yes, the M74HC161B1R can be used as a synchronous counter. The clock input (CP) is synchronized with the internal clock, allowing for synchronous counting.
• How do I handle the carry output (TC) in my design?
  The carry output (TC) is an active-high output that goes high when the counter overflows. You can use this output to cascade multiple counters or to trigger other logic circuits. Make sure to connect the TC pin to a pull-down resistor to prevent it from floating.