Dual-frequency MEMS oscillator for clock-tree consolidation
The DSC2311KE1-R0002T is a MEMS-based XO (Standard) oscillator from Microchip's DSC2311 series that delivers two independent CMOS clock outputs: 25 MHz on output 1 and 125 MHz on output 2. This lets a single device drive a mixed-speed clock tree — for example, a 25 MHz MCU core clock alongside a 125 MHz Ethernet PHY reference — reducing component count and routing complexity on the board.
Supply voltage flexibility and power-down control
Operating from 2.25 V to 3.6 V, the part covers 2.5 V and 3.3 V logic rails without an external LDO. When disabled, the maximum supply current drops to 23 mA, which is the residual draw from the MEMS core and PLL.
Package footprint and layout considerations
The 6-VDFN package measures 2.50 mm x 2.00 mm with a 0.90 mm height. This compact footprint suits space-constrained designs like PCIe cards or small-form-factor modules. The 0.90 mm profile clears typical board-to-board stacking gaps. Standard FR-4 layout rules apply — place the decoupling cap within 2 mm of the supply pin, and keep the CMOS output trace short to minimise edge-rate ringing.
It fits indoor equipment, office peripherals, networking gear, and consumer electronics. Not qualified for automotive (no AEC-Q100) or extended industrial ambient above 70°C.
The base product number DSC2311 covers the series; confirm the specific frequency and stability variant when ordering.