Part Number: LMK01020
I need help on 2 questions w.r.t. LMK01020.
1)Unused Clock outputs termination:
out of 7 LVPECL output clocks i am using 5, 2 will be unused in my design so in that case should i terminate the unused clocks or can i just leave those unused pins floating?
out of 2 input clock options I am using one, and in that case should i terminate the unused clocks or can i just leave those unused pins floating?
2) Decoupling capacitor recommendation on the VCC Pins:
What is the typical Decoupling capacitor network suggestion. Also which clock output is tied with which VCC pins? so that i can provide filtering option on only used rail, in that way i can optimize BOM of my board.
A1. Simply leave the unused input and output clocks unterminated and unrouted. This will slightly reduce the current consumption.
A2. I recommend the decoupling network shown below. Place one 0.1uF bypass cap on each supply pin.
More information Clock and Timing System products: http://www.ti.com/clock-and-timing/overview.html
Learn more about clocking fundamentals by watching the TI Precision Labs: https://training.ti.com/ti-precision-labs-clocks-and-timing
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In reply to Lane Boyd:
Thank you, this helps.
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