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Microchip Technology DSC1121CI2-051.8400T — Crystals & Oscillators

DSC1121CI2-051.8400T MEMS XO – 51.84 MHz, AEC-Q100, Active

MPNDSC1121CI2-051.8400T
Active

Microchip Technology DSC1121CI2-051.8400T, XO (Standard) 51.84 MHz, CMOS output, MEMS resonator, ±25 ppm stability, -40 to 85°C, AEC-Q100, 6-SMD no lead, Tape & Reel

Microchip Technology DSC1121CI2-051.8400T datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

DSC1121CI2-051.8400T specifications
ParameterValue
TypeXO (Standard)
SeriesDSC1121
MountingSurface Mount
Supply voltage2.25V ~ 3.6V
Current - supply35mA
Current - supply (Disable)22mA
Frequency51.84 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

What this 51.84 MHz MEMS oscillator is for

That 51.84 MHz frequency is a common reference for 1000BASE-T Ethernet, video pixel clocks, and FPGA transceiver PLLs – not a general-purpose MCU clock. The Enable/Disable function lets the system shut down the oscillator without removing supply, dropping the disable current to 22 mA max from the 35 mA max active draw.

AEC-Q100 qualification and temperature grade

Rated AEC-Q100, this oscillator is qualified for automotive stress conditions – temperature cycling, ESD, and latch-up per the AEC-Q100 test flow. Frequency stability is held to ±25 ppm over that temperature range, tight enough for a 1000BASE-T clock without a separate VCXO.

This part is suitable for new designs and production ramps.

Frequently asked questions

Can the DSC1121CI2-051.8400T replace a standard quartz oscillator?

Yes – the MEMS resonator is pin-compatible with many 6-pin quartz XOs in the same 3.2 x 2.5 mm footprint. The CMOS output and supply range match typical quartz oscillators. The AEC-Q100 rating and better shock/vibration tolerance are the upgrade.

What is the output type of the DSC1121CI2-051.8400T?

CMOS output, single-ended. No LVPECL or LVDS variant – the DSC1121 series uses CMOS for the standard XO line.

Is the DSC1121CI2-051.8400T AEC-Q100 qualified?

Yes, it carries an AEC-Q100 rating, making it suitable for automotive applications where the temperature grade and reliability stress requirements apply.