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Microchip Technology DSC1121BM1-040.0000T — Crystals & Oscillators

DSC1121BM1-040.0000T MEMS XO, 40 MHz, CMOS, AEC-Q100

MPNDSC1121BM1-040.0000T
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Microchip DSC1121 series MEMS XO, 40.0000 MHz, CMOS output, ±50 ppm stability, 6-VDFN package, AEC-Q100 qualified, -55 to +125 °C operating range.

Microchip Technology DSC1121BM1-040.0000T datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

DSC1121BM1-040.0000T specifications
ParameterValue
TypeXO (Standard)
SeriesDSC1121
MountingSurface Mount
Voltage2.25V ~ 3.6V
Current - supply35mA
Current - supply (Disable)22mA
Frequency40 MHz
Frequency stability±50ppm
Operating temperature-55°C ~ 125°C
Size (Dimension)0.197\" L x 0.126\" W (5.00mm x 3.20mm)
Height - seated0.035\" (0.90mm)
OutputCMOS
PackageTape & Reel (TR)
RatingsAEC-Q100
FunctionEnable/Disable
Base resonatorMEMS
Case6-VDFN

Product details

MEMS oscillator at 40 MHz with CMOS output

The DSC1121BM1-040.0000T is a MEMS-based XO (standard oscillator) from Microchip's DSC1121 series, delivering a 40 MHz CMOS output with ±50 ppm frequency stability.

Temperature grade and automotive qualification

AEC-Q100 qualification (Grade 1 implied by the temperature range) means the oscillator passed automotive reliability stress tests: it belongs in under-hood ECUs, chassis controllers, and ADAS sensor modules that see engine-bay heat and vibration.

Supply range and current draw

Operates from 2.25 V to 3.6 V, so it runs on a single 3.3 V or 2.5 V rail without an extra LDO — the wide range also absorbs supply ripple from a switching regulator.

Housed in a 6-VDFN package measuring 5.00 mm × 3.20 mm with a seated height of 0.90 mm — a low-profile, surface-mount footprint that matches standard 5×3.2 mm oscillator pads.

Frequently asked questions

Can DSC1121BM1-040.0000T replace a standard 40 MHz quartz oscillator?

Functionally yes — it outputs a 40 MHz CMOS clock with ±50 ppm stability, which is comparable to many quartz XOs. The MEMS resonator is more shock- and vibration-tolerant than quartz, and the enable/disable pin adds flexibility that a basic quartz oscillator lacks. Pin compatibility depends on the existing footprint; the 6-VDFN package is 5.0×3.2 mm, so confirm the pad layout matches.

Does DSC1121BM1-040.0000T have an enable/disable function?

Yes, the part includes an Enable/Disable pin. When disabled, the output goes high-impedance and supply current drops to 22 mA max (from 35 mA max when enabled). The MEMS resonator and internal PLL remain powered, so the oscillator restarts quickly when re-enabled.