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The information presented in this cross reference is based on TOSHIBA's selection criteria and should be treated as a suggestion only. Please carefully review the latest versions of all relevant information on the TOSHIBA products, including without limitation data sheets and validate all operating parameters of the TOSHIBA products to ensure that the suggested TOSHIBA products are truly compatible with your design and application.
Please note that this cross reference is based on TOSHIBA's estimate of compatibility with other manufacturers' products, based on other manufacturers' published data, at the time the data was collected.
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The output waveform of a CMOS logic IC has transients that look like spikes. What can I do to prevent this?

Generally, high-speed logic ICs with high output current capability tend to have voltage spikes called overshoot and undershoot.
The following countermeasures can be considered:

  • Increasing the width and reducing the length of power and GND traces (or using a multilayer board)
  • Adding a bypass capacitor between the power supply and GND pins (as close as possible to the IC)
  • Selecting a logic IC series with lower output current capability (Select a product with low output capacity).
  • Adding a damping resistor (R = 25 to 100 Ω) in series with the output pin
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