Use this electronics calculation for a first-pass component, converter, signal, motor, or sensor estimate when the stated operating conditions and units match the device data.

Rise time (ns)

Required number input.

Compute the Gaussian rule bandwidth as 350 / rise time in nanoseconds giving MHz. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

Bandwidth (MHz)

The resulting bandwidth returned as a number.

• Compact electronics formulas omit some combination of tolerances, temperature drift, bandwidth, loading, parasitics, noise spectrum, nonlinearity, clipping, calibration, layout, and device-specific limits. Typical datasheet values are not guaranteed limits.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Check the result against the current datasheet and worst-case operating corners, then verify the circuit or measurement with simulation and bench testing where failure matters.

• Rise Time From BW

  Compute the Gaussian response rise time as 350 / bandwidth in MHz giving nanoseconds.

• PLL Lock Time

  Estimate the settling time of a phase-locked loop using the documented rule that lock takes roughly four time constants of the natural frequency in radians per second (4 divided by two pi times the loop bandwidth in Hz).

• I2C Pullup Max

  Compute the maximum I2C pull-up resistance from the bus rise time and total bus capacitance using Rp(max) = trise / (0.8473 x Cb).