Switching Characteristics
The
switching characteristics section of the data sheet, also known in the industry as the ac table, includes those parameters that specify how fast the outputs will respond to signal changes at the inputs under specified conditions of supply voltage, temperature, and load (see Figure below). Switching Characteristics are included for each timing device, including clocks, peripherals and memory interfaces, and interrupts.Helpful Hint:
The switching characteristics table sometimes is called the ac section, and should not be confused with the ac small-signal performance because switching characteristics describe the large-signal transient response of the circuit.
For more information on these parameters, please select the link below:
fmax Maximum Clock Frequency tpd Propagation Delay Time tPHL Propagation Delay Time, High-Level to Low-Level Output tPLH Propagation Delay Time, Low-Level to High-Level Output ten Enable Time (of a 3-State or Open-Collector Output) tPZH Enable Time (of a 3-State Output) to High Level tPZL Enable Time (of a 3-State Output) to Low Level tdis Disable Time (of a 3-State or Open-Collector Output) tPHZ Disable Time (of a 3-State Output) From High Level tPLZ Disable Time (of a 3-State Output) From Low Level tf Fall Time tr Rise Time Slew Rate tsk(i) Input Skew tsk(l) Limit Skew tsk(o) Output Skew tsk(p) Pulse Skew tsk(pr) Process Skew