The DSC1123DI5-156.2500T is an active-production XO (Standard) from Microchip's DSC1123 series, delivering a 156.25 MHz LVDS output from a MEMS resonator.
Supply flexibility and package footprint
The supply range spans 2.25 V to 3.63 V, so the same BOM line works on a 2.5 V FPGA bank or a 3.3 V microcontroller rail without a separate regulator. The 6-SMD no-lead package measures 2.50 mm x 2.00 mm with a seated height of 0.90 mm — a compact footprint that fits under a mezzanine card or alongside a dense BGA cluster. The disable current maxes at 22 mA versus 32 mA active — not a dramatic power savings, but enough to keep a battery-backed RTC domain from draining through the oscillator output stage.
For a new design, this part is design-in ready; for an existing BOM, it is a stable line item with no imminent end-of-life risk. The DSC1123 series includes other frequencies and stability grades; the base product number DSC1123 covers the family if a different frequency is needed.