One of the major drawbacks to the use of asynchronous counters is that:

• low-frequency applications are limited because of internal propagation delays
• high-frequency applications are limited because of internal propagation delays
• Asynchronous counters do not have major drawbacks and are suitable for use in high- and low-frequency counting applications.
• Asynchronous counters do not have propagation delays, which limits their use in high-frequency applications.