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Microchip Technology DSC1121CI2-066.6660T — Crystals & Oscillators

DSC1121CI2-066.6660T MEMS XO 66.666 MHz AEC-Q100 Microchip

MPNDSC1121CI2-066.6660T
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Microchip DSC1121 series MEMS XO, 66.666 MHz CMOS output, ±25 ppm stability, 2.25-3.6 V supply, AEC-Q100 automotive grade, 6-SMD package.

$1.0200Ref. price · indicative, final on quote
Microchip Technology DSC1121CI2-066.6660T datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

DSC1121CI2-066.6660T specifications
ParameterValue
TypeXO (Standard)
SeriesDSC1121
MountingSurface Mount
Voltage2.25V ~ 3.6V
Current - supply35mA
Current - supply (Disable)22mA
Frequency66.666 MHz
Frequency stability±25ppm
Operating temperature-40°C ~ 85°C
Size (Dimension)0.126\" L x 0.098\" W (3.20mm x 2.50mm)
Height - seated0.035\" (0.90mm)
OutputCMOS
PackageTape & Reel (TR)
RatingsAEC-Q100
FunctionEnable/Disable
Base resonatorMEMS
Case6-SMD, No Lead

Product details

MEMS oscillator at 66.666 MHz — automotive CMOS clock source

The DSC1121CI2-066.6660T is a MEMS-based XO (standard oscillator) from Microchip's DSC1121 series, delivering a fixed 66.666 MHz CMOS output with enable/disable function.

Supply voltage range and current draw

Operates from 2.25 V to 3.6 V, covering 2.5 V, 3.0 V, and 3.3 V rails common in automotive microcontrollers and transceivers.

Package and footprint — 6-SMD, no lead

Housed in a 6-SMD, no-lead package measuring 3.20 mm x 2.50 mm with a seated height of 0.90 mm. The 0.126" x 0.098" footprint is standard for 6-pin MEMS oscillators — layout matches the common 3.2x2.5 mm XO land pattern. Supplied on tape and reel.

No direct pin-compatible second source is listed in the DSC1121 family, but the 6-SMD MEMS oscillator footprint is widely adopted across multiple suppliers.

Frequently asked questions

Is DSC1121CI2-066.6660T an equivalent replacement for a quartz oscillator?

Yes, functionally it replaces a quartz-based XO at 66.666 MHz with CMOS output. The MEMS resonator provides faster start-up and better shock/vibration tolerance, but the electrical interface (CMOS, enable/disable) and 6-SMD footprint are the same as a standard quartz oscillator. Verify the supply voltage range (2.25-3.6 V) and frequency stability (±25 ppm) match your design.

What does the AEC-Q100 rating mean for this oscillator?

AEC-Q100 certifies the part for automotive-grade reliability: it has passed temperature cycling, ESD, latch-up, and accelerated life tests per the AEC-Q100 stress qualification flow. The -40 to +85 °C operating range suits cabin and engine-bay environments. The MEMS construction inherently resists 50,000 g shock and 70 g vibration, exceeding quartz crystal fragility limits.