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Microchip Technology DSC1121AE1-040.0000T — Crystals & Oscillators

DSC1121AE1-040.0000T MEMS Oscillator 40 MHz CMOS AEC-Q100

MPNDSC1121AE1-040.0000T
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Microchip Technology DSC1121AE1-040.0000T, XO (Standard), 40 MHz, CMOS output, ±50 ppm stability, 2.25 V to 3.6 V supply, AEC-Q100, Enable/Disable, 6-SMD package.

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

Specifications

DSC1121AE1-040.0000T specifications
ParameterValue
TypeXO (Standard)
SeriesDSC1121
MountingSurface Mount
Voltage2.25V ~ 3.6V
Current - supply35mA
Current - supply (Disable)22mA
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
PackageTape & Reel (TR)
RatingsAEC-Q100
FunctionEnable/Disable
Base resonatorMEMS
Case6-SMD, No Lead Exposed Pad

Product details

MEMS oscillator for automotive timing

The DSC1121AE1-040.0000T is a 40 MHz MEMS-based XO from Microchip's DSC1121 series, delivering a CMOS output with ±50 ppm frequency stability across its -20°C to 70°C operating range. Rated AEC-Q100, this oscillator is qualified for automotive applications — the MEMS resonator provides better shock and vibration tolerance than a quartz crystal, which matters for cabin electronics and infotainment modules that see road vibration. The Enable/Disable function lets the system power down the oscillator output, dropping supply current from 35 mA max to 22 mA max — useful for sleep-mode power budgets in always-on automotive ECUs.

Package and board layout

Housed in a 6-SMD, No Lead Exposed Pad package measuring 7.00 mm x 5.00 mm with a seated height of 0.90 mm — the exposed pad requires a thermal via pattern under the package for proper heat sinking and mechanical stability.

Suitable for new designs and production builds. Sourced through independent distribution; quoted to order against the BOM quantity.

Frequently asked questions

Is DSC1121AE1-040.0000T a direct replacement for a standard quartz oscillator?

Yes, it is pin-compatible with standard 6-pin SMD quartz oscillators of the same footprint. The MEMS resonator offers better shock and vibration tolerance, but the electrical interface (CMOS output, supply range, Enable/Disable logic) is the same. Confirm the Enable/Disable logic polarity matches your design — the DSC1121 uses active-low enable by default.

Does DSC1121AE1-040.0000T have enable/disable and what is the logic?

Yes, the Enable/Disable function is standard on this part. The output is enabled when the enable pin is driven low (active-low logic). When disabled, the output goes to high-impedance state, and supply current drops from 35 mA max to 22 mA max.