Dual-frequency MEMS XO for audio-video clock trees
The DSC6121CE2A-0081: These two clock rates are the standard audio and video reference frequencies: 22.5792 MHz for 44.1 kHz-based audio sample rates and 24.576 MHz for 48 kHz-based audio and SDI video. A single oscillator replaces two quartz cans on the bill of materials.
Typical current draw is 3 mA max, keeping the thermal load low in the 4-VDFN package. The MEMS resonator itself draws negligible current compared to the output buffer, so the supply current is dominated by the CMOS load being driven. For a 24.576 MHz clock, ±25 ppm translates to a maximum frequency error of about 614 Hz — well within the pull-in range of a typical audio PLL.
MEMS reliability vs quartz — the sourcing angle
For a BOM line locked to this dual-frequency output pair, the only sourcing channel is independent distribution holding new-old-stock or surplus inventory. No pin-compatible direct successor is recorded in the Microchip DSC61XX family; a replacement would require requalifying a different order code or a board spin.