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Microchip Technology DSC1121AE1-040.0000 — Crystals & Oscillators

DSC1121AE1-040.0000 MEMS Oscillator 40 MHz CMOS XO

MPNDSC1121AE1-040.0000
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Microchip Technology DSC1121AE1-040.0000, MEMS-based XO (Standard), 40 MHz fixed frequency, CMOS output, ±50 ppm stability, 2.25-3.6 V supply, -20°C to 70°C, 6-SMD no-lead package.

Microchip Technology DSC1121AE1-040.0000 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

DSC1121AE1-040.0000 specifications
ParameterValue
TypeXO (Standard)
SeriesDSC1121
MountingSurface Mount
Voltage2.25V ~ 3.6V
Current - supply22mA
Frequency40 MHz
Frequency stability±50ppm
Operating temperature-20°C ~ 70°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-SMD, No Lead

Product details

MEMS resonator replaces quartz — what that buys the clock tree

This eliminates the quartz cold-start and aging drift that can shift frequency over temperature and time. For a 40 MHz clock feeding an FPGA or MCU, the MEMS construction delivers tighter initial accuracy and better vibration immunity than a comparable quartz oscillator, though the ±50 ppm stability spec is in line with a standard quartz XO.

40 MHz CMOS output — supply and load considerations

The 22 mA max supply current at 40 MHz is typical for a CMOS output at this frequency; the actual draw depends on the load capacitance on the output pin.

Frequently asked questions

Can DSC1121AE1-040.0000 replace a standard crystal oscillator?

Yes — it is a drop-in replacement for a standard quartz XO in the same 6-SMD no-lead footprint (7.00 mm x 5.00 mm). The MEMS resonator eliminates the external load capacitors and startup time associated with a bare crystal, but the output is a fixed 40 MHz CMOS clock, so the downstream logic must accept that frequency. The ±50 ppm stability is equivalent to a typical quartz XO.