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LMK04826BEVM: can we use 5V for pin 36 (VCC6_PLL1)?

Part Number: LMK04826BEVM
Other Parts Discussed in Thread: LMK04826

hi team,

the customer wants to use PLL1 to drive a 5V OCXO. can you please provide the technical reason why they cannot use 5V for the pin 36?



  • Hi Kevin,

    The LMK04826 internal circuitry is designed to operate from 3.3V. Applying 5V to pin 36 will damage the device.

    In cases where the control voltage of the PLL1 oscillator is >3.3V, TI recommends using an active filter as a level-shifter.