Supply tolerance and decoupling at the 8-QFM footprint
The LMK61E0M-SIAR: The supply range of 3.135 V to 3.465 V is a tight 3.3 V ±5 % window. A 3.3 V rail that droops below 3.135 V under load — common when sharing a rail with a noisy FPGA core — will pull the oscillator out of spec. Place a 0.1 µF ceramic cap within 2 mm of each VDD pin on the 8-QFM pad; the 7×5 mm land pattern leaves room for a single 0402 cap per supply pin without crowding the signal trace.
Industrial temperature range and deployment context
It suits outdoor base-station equipment, factory-floor Ethernet switches, and test instrumentation that sees ambient swings across the full range. The 200 MHz fixed output is a common reference for 10/25/40 GbE PHYs and high-speed FPGAs that need a clean, jitter-controlled clock source without an external crystal and PLL loop.