SN74LVC2G53: Frequency response

Part Number: SN74LVC2G53

Hi Team,

My customer would like to use PWM signal(about 100kHz) on SN74LVC2G53. For the frequency response of SN74LVC2G53, does it mean SN74LVC2G53 can support frequency up to MHz according to VCC? 

Best regards,

Hardy

  • Hi Hardy,

    At 3V with a 50pF and 600 Ohm load the switch has a -3dB bandwidth of ~190MHz and when the capacitor and resistor are 5pF and 50 Ohms the bandwidth can be >300MHz. 

    - One note is that we test frequency with a sine wave - so when passing a square wave some margin should be used  (3/2 * fundamental frequency as a minimum) so a 100MHz square wave should have ~150MHz of bandwidth to capture the higher frequency content. 

    This part should have no problem passing a 100KHz PWM signal as it will be well below the bandwidth. As long as the PWM signal doesn't violate any of the voltage specifications on the multiplexers pins  (0V - VCC is the rec. operating conditions with a 3V supply) and to make sure that no more than +/-50mA are flowing through the switch. If these conditions are met I don't see any issue with using this part in this application.

    If you have any other questions please let me know!

    Best,

    Parker Dodson

  • Hi Parker,

    Thanks for your prompt response and clear explanation. I will let customer know that.

    I will close this thread.

    Best regards,

    Hardy