Microchip DSC1121AI2-066.6660T, XO (Standard) 66.666 MHz, CMOS output, MEMS resonator, ±25ppm stability, -40°C to 85°C, 6-VDFN exposed pad, Active
| Parameter | Value |
|---|---|
| Type | XO (Standard) |
| Series | DSC1121 |
| Mounting | Surface Mount |
| Voltage | 2.25V ~ 3.6V |
| Current - supply | 35mA |
| Current - supply (Disable) | 22mA |
| Frequency | 66.666 MHz |
| Frequency stability | ±25ppm |
| Operating temperature | -40°C ~ 85°C |
| Size (Dimension) | 0.276\" L x 0.197\" W (7.00mm x 5.00mm) |
| Height - seated | 0.035\" (0.90mm) |
| Output | CMOS |
| Package | Tape & Reel (TR) |
| Function | Enable/Disable |
| Base resonator | MEMS |
| Case | 6-VDFN Exposed Pad |
Supply voltage spans 2.25V to 3.6V — the same part number covers 2.5V and 3.3V rails without a separate BOM line, and the Enable/Disable function lets a GPIO gate the oscillator off, pulling the supply current from 35 mA down to 22 mA.
6-VDFN exposed pad package, 7.00 mm x 5.00 mm body, 0.90 mm seated height — the exposed pad needs a thermal via pattern under the package to pull heat into the ground plane; without it the junction temperature rises faster under the 35 mA supply current.
Yes — it is a drop-in XO replacement in the same 7x5 mm footprint. The MEMS resonator offers better shock and vibration tolerance than quartz, which is an advantage in industrial or motor-driven environments. Confirm the supply voltage and Enable/Disable logic polarity match the existing design.
Yes — the full datasheet for the DSC1121 series is available from Microchip. It includes the pinout for the 6-VDFN package, the Enable/Disable timing diagram, and the frequency stability vs. temperature curves.