125 MHz HCSL reference from a MEMS resonator
Output is HCSL, the differential clock format used in PCIe, SATA, and Ethernet PHY reference inputs. Supply voltage spans 2.25V to 3.6V, covering both 2.5V and 3.3V rails without a separate LDO. The wide range also absorbs rail droop during load transients on the same supply.
Frequency stability and temperature grade
Do not use in an outdoor telecom cabinet or engine bay without a thermal study — the MEMS die itself can survive wider, but the datasheet guarantee stops at 70°C.
Active current is 42 mA max at 125 MHz HCSL — the HCSL output stage drives a differential pair into 50-Ω loads, so the current is higher than a single-ended LVCMOS oscillator at the same frequency.
6-SMD no-lead package, 2.50 mm × 2.00 mm body, 0.90 mm seated height. The small footprint leaves room for the HCSL AC-coupling caps and termination resistors close to the oscillator.