The DSC8124CI2: HCSL is a differential current-mode logic level commonly used as the reference clock for PCIe interfaces, Ethernet PHYs, and FPGA transceiver blocks — the 42 mA max supply current at the high end of the range reflects the current-steering output stage. The MEMS resonator eliminates the load-capacitance matching and startup margin calculations that quartz crystals require; the oscillator starts reliably without external load caps or a negative-resistance check.
Blank-programmed — what the BOM engineer needs to plan
The DSC8124CI2 ships as a blank (unprogrammed) device — the user must program the target frequency before assembly using Microchip's programming tools or a pre-programming service. This is the same blank-programmable model used across the DSC8124 family; the base product number DSC8124 identifies the family, and the suffix encodes the temperature range and stability grade. For high-volume builds, factor in the programming step or order pre-programmed parts from Microchip's factory-programmed channel.