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Microchip Technology DSC1121CM1-066.6660 — Crystals & Oscillators

DSC1121CM1-066.6660 MEMS Oscillator

MPNDSC1121CM1-066.6660
Active

Microchip Technology DSC1121 series MEMS XO, 66.666 MHz, CMOS output, ±50 ppm stability, 2.25 V to 3.6 V supply, -55°C to 125°C, 6-SMD no-lead package.

Microchip Technology DSC1121CM1-066.6660 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

DSC1121CM1-066.6660 specifications
ParameterValue
TypeXO (Standard)
SeriesDSC1121
MountingSurface Mount
Supply voltage2.25V ~ 3.6V
Current - supply22mA
Frequency66.666 MHz
Frequency stability±50ppm
Operating temperature-55°C~125°C
Size (Dimension)0.126\" L x 0.098\" W (3.20mm x 2.50mm)
Height - seated0.035\" (0.90mm)
OutputCMOS
PackageTube
FunctionEnable/Disable
Base resonatorMEMS
Case6-SMD, No Lead

Product details

66.666 MHz MEMS XO with full military temperature range

The DSC1121CM1-066.6660 is a standard MEMS-based oscillator (XO) from Microchip's DSC1121 series, delivering a 66.666 MHz CMOS output with ±50 ppm frequency stability across the full -55°C to 125°C military temperature range.

Supply voltage flexibility and output control

The 6-SMD no-lead package measures 3.20 mm x 2.50 mm with a seated height of 0.90 mm — a standard 3.2 x 2.5 mm MEMS oscillator footprint that matches many quartz oscillator pads, easing a drop-in replacement on existing layouts.

Frequently asked questions

What is the frequency stability of the DSC1121CM1-066.6660?

±50 ppm across the full -55°C to 125°C range — that includes the temperature drift, initial accuracy, and aging. For a 66.666 MHz carrier, ±50 ppm equals about ±3.3 kHz of total frequency error worst-case.

Is the DSC1121CM1-066.6660 RoHS compliant?

The DSC1121 series is listed as RoHS compliant by Microchip. The 6-SMD package is lead-free and compatible with standard reflow profiles.

Can I use the DSC1121CM1-066.6660 in a 3.3 V circuit?

Yes. The CMOS output swings rail-to-rail, so it drives 3.3 V logic inputs directly.

Does the DSC1121CM1-066.6660 have a pin-compatible equivalent from other brands?

Several MEMS oscillator vendors (SiTime, Abracon, Epson) offer 3.2 x 2.5 mm 6-pin XOs with the same enable/disable pinout and CMOS output. Confirm the supply voltage range and frequency stability against your requirement — the Microchip DSC1121 series is one option in a cross-compatible footprint.