Dual-frequency MEMS oscillator — what the key ratings mean for the BOM
The DSC6121CE2A-0082: A single oscillator covering two common telecom/audio clock rates means one BOM line replaces two discrete XOs, saving board area and reducing inventory complexity. Maximum current draw is 3 mA typical — low enough for battery-powered or thermally constrained designs where every milliampere counts. For a 49.152 MHz clock, ±25 ppm translates to roughly ±1.2 kHz of absolute jitter budget — sufficient for most Ethernet PHY and audio codec reference clocks, though a tighter ±10 ppm part would be needed for precision video timing.
Obsolete — sourcing reality and what replaces it
A board-level evaluation of any replacement is advised before committing the BOM line.