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Microchip Technology DSC1121CM1-018.0000 — Crystals & Oscillators

DSC1121CM1-018.0000 MEMS XO – 18 MHz, CMOS, -55°C to 125°C

MPNDSC1121CM1-018.0000
Active

Microchip Technology DSC1121CM1-018.0000, Series DSC1121, XO (Standard) 18 MHz CMOS output MEMS oscillator, ±50 ppm stability, 2.25V–3.6V supply, -55°C to 125°C, 6-SMD package, tube, active production.

Microchip Technology DSC1121CM1-018.0000 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

DSC1121CM1-018.0000 specifications
ParameterValue
TypeXO (Standard)
SeriesDSC1121
MountingSurface Mount
Supply voltage2.25V ~ 3.6V
Current - supply22mA
Frequency18 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

18 MHz MEMS XO – full military temp range

An engine-bay ECU or a remote telemetry unit that sees 105°C ambient still has 20°C of margin before the oscillator drifts outside its ±50 ppm stability window. Supply voltage spans 2.25V to 3.6V — it runs on a 2.5V or 3.3V rail without a separate LDO.

Product status is Active per Microchip's current lifecycle designation.

6-SMD footprint and board integration

Housed in a 6-SMD, No Lead package measuring 3.20mm x 2.50mm with a seated height of 0.90mm. The 0.126" x 0.098" footprint matches the standard 3.2 x 2.5 mm oscillator land pattern — no special fan-out or via-in-pad required.

Frequently asked questions

Is DSC1121CM1-018.0000 compatible with a 3.3V supply?

Yes. The supply voltage range is 2.25V to 3.6V, so both 2.5V and 3.3V rails are within spec. No external regulator needed.

What is the frequency stability of DSC1121CM1-018.0000?

This stability holds across the entire supply voltage window — no additional derating for supply variation.

What is the closest pin-compatible alternative in the DSC1121 family?

The DSC1121 series shares the same 6-SMD footprint and pinout across all frequency variants. A different frequency order code (e.g., DSC1121CM1-025.0000) is a direct drop-in replacement if the system clock can change. No quartz-based alternative is pin-compatible — the MEMS package is unique to this series.