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Microchip Technology DSC1121BI1-125.0038 — Crystals & Oscillators

DSC1121BI1-125.0038 Microchip MEMS XO 125.0038 MHz CMOS

MPNDSC1121BI1-125.0038
Active

Microchip Technology DSC1121 series, XO (Standard), 125.0038 MHz, CMOS output, ±50 ppm stability, AEC-Q100 qualified, 6-SMD package.

Microchip Technology DSC1121BI1-125.0038 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

DSC1121BI1-125.0038 specifications
ParameterValue
TypeXO (Standard)
SeriesDSC1121
MountingSurface Mount
Voltage2.25V ~ 3.6V
Current - supply35mA
Current - supply (Disable)22mA
Frequency125.0038 MHz
Frequency stability±50ppm
Operating temperature-40°C~85°C
Size (Dimension)0.197\" L x 0.126\" W (5.00mm x 3.20mm)
Height - seated0.035\" (0.90mm)
OutputCMOS
PackageTube
RatingsAEC-Q100
FunctionEnable/Disable
Base resonatorMEMS
Case6-SMD, No Lead

Product details

125.0038 MHz MEMS oscillator with AEC-Q100 qualification

The DSC1121BI1-125.0038 is a MEMS-based XO (Standard) from Microchip Technology, delivering a fixed 125.0038 MHz CMOS output.

Enable/Disable function and supply range

The Enable/Disable pin lets a system controller gate the clock output without cycling the 2.25V to 3.6V supply rail. When disabled, the supply current drops from a 35 mA max active draw to 22 mA max — enough to reduce board-level power in a sleeping ECU without losing the oscillator's lock.

6-SMD footprint and MEMS reliability

Housed in a 5.00 mm x 3.20 mm, 0.90 mm seated-height 6-SMD No Lead package, the DSC1121BI1-125.0038 is a surface-mount drop-in for standard XO footprints. The MEMS base resonator eliminates the quartz crystal's shock and vibration sensitivity — useful for automotive and industrial environments where board-level g-force can pull a quartz oscillator off frequency.

Frequently asked questions

Is the DSC1121BI1-125.0038 equivalent to a standard quartz oscillator?

Functionally it replaces a 125.0038 MHz quartz XO with CMOS output in the same 6-SMD footprint. The difference is the MEMS resonator inside — it offers better shock/vibration resistance and a wider supply range (2.25V to 3.6V) than many quartz parts, but the pinout and output type are standard.

Can the DSC1121BI1-125.0038 be used in automotive applications?

Yes — it is AEC-Q100 qualified, meaning it has passed the temperature cycling, ESD, and reliability stress tests required for automotive ICs.

Does the DSC1121BI1-125.0038 have an enable/disable function?

Yes, the Enable/Disable pin is standard on this DSC1121 series part. When pulled low (or left floating depending on the logic), the output goes to high-impedance and the supply current drops to 22 mA max.