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Microchip Technology DSC1121AI2-066.6660 — Crystals & Oscillators

DSC1121AI2-066.6660 MEMS XO 66.666 MHz CMOS ±25 ppm

MPNDSC1121AI2-066.6660
Active

Microchip DSC1121AI2-066.6660, MEMS-based XO (Standard), 66.666 MHz CMOS output, ±25 ppm frequency stability, 2.25V–3.6V supply, -40°C to +85°C, 6-VDFN exposed pad package.

Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

DSC1121AI2-066.6660 specifications
ParameterValue
TypeXO (Standard)
SeriesDSC1121
MountingSurface Mount
Voltage2.25V ~ 3.6V
Current - supply35mA
Current - supply (Disable)22mA
Frequency66.666 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 - seated0.035\" (0.90mm)
OutputCMOS
PackageTube
FunctionEnable/Disable
Base resonatorMEMS
Case6-VDFN Exposed Pad

Product details

66.666 MHz MEMS oscillator — ±25 ppm over industrial temperature

Unlike a quartz crystal oscillator, the MEMS resonator is less sensitive to vibration and has a faster startup time — the part is ready within a few milliseconds of supply application.

Enable/Disable function and wide supply tolerance

Supply voltage spans 2.25V to 3.6V, so the same part can be used on a 2.5V FPGA bank and a 3.3V microcontroller rail without a level translator on the clock line.

6-VDFN exposed pad — thermal and layout note

The 6-VDFN Exposed Pad package (7.00 mm x 5.00 mm, 0.90 mm seated height) requires a thermal pad on the PCB for proper heat dissipation — the exposed paddle should be soldered to a ground plane pour for best thermal performance.

Frequently asked questions

Is the DSC1121AI2-066.6660 a direct replacement for a quartz oscillator?

Yes — it is a MEMS-based XO (Standard) with a CMOS output, so it is a drop-in functional replacement for a quartz oscillator in the same package and pinout. The MEMS resonator offers better vibration immunity and faster startup.