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LMK04208: Configuration of CLK0=3.3V LVCMOS, CLK4,5,6=1.8V LVCMOS

Part Number: LMK04208
Other Parts Discussed in Thread: LMK1C1104

Hi all

Would you mind if we ask LMK04208?

Our customer would like to configure with CLK0=3.3V LVCMOS, CLK4,5,6=1.8V LVCMOS.(clockouts with diffrential voltage)
Is it possible?

Kind regard,

Hirotaka Matsumoto

  • Hello Matsumoto-san,

    LMK04208 only supports 3.3V LVCMOS. 1.8V LVCMOS outputs require an additional buffer/level-shifter at VDD=1.8V, such as the LMK1C1104. LMK1C1104 is 3.3V-tolerant at all inputs, even if driven from a 1.8V supply, so it could level-shift one 3.3V LVCMOS output from LMK04208 to multiple 1.8V LVCMOS outputs. If the customer has multiple frequencies on CLK4,5,6, more buffers/level-shifters would be required.