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Microchip Technology DSC400-0444Q0009KE1T — Crystals & Oscillators

DSC400-0444Q0009KE1T MEMS XO 100 MHz HCSL Quad Output

MPNDSC400-0444Q0009KE1T
Active

Microchip DSC400 series MEMS XO, 100 MHz HCSL output, 2.25 V to 3.6 V supply, ±50 ppm stability, 20-VFQFN exposed pad, -20°C to 70°C

Microchip Technology DSC400-0444Q0009KE1T datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

DSC400-0444Q0009KE1T specifications
ParameterValue
TypeXO (Standard)
SeriesDSC400
Voltage2.25V ~ 3.6V
Frequency stability±50ppm
Frequency - output 1100MHz
Frequency - output 2100MHz
Frequency - output 3100MHz
Operating temperature-20°C~70°C
Height0.035\" (0.90mm)
Size (Dimension)0.197\" L x 0.126\" W (5.00mm x 3.20mm)
OutputHCSL
PackageTape & Reel (TR)
FunctionEnable/Disable
Base resonatorMEMS
Case20-VFQFN Exposed Pad

Product details

Three 100 MHz HCSL lanes from a MEMS resonator

HCSL is the differential signalling standard used for PCIe reference clocks — the 100 MHz frequency matches the PCIe Gen 1/2/3 base clock rate, so this part can serve as the common clock source for multiple PCIe lanes or SerDes channels on a board. The supply voltage range of 2.25 V to 3.6 V lets it run off either a 2.5 V or 3.3 V rail without an intermediate regulator.

Temperature grade and package constraints

It fits indoor telecom switches, server motherboards, and office networking gear — not outdoor base stations or under-hood automotive. The 20-VFQFN exposed-pad package (5.00 mm x 3.20 mm, 0.90 mm height) requires a thermal pad on the PCB for heat sinking; the pad also provides a low-inductance ground return for the HCSL outputs.

Frequently asked questions

What is the output frequency of DSC400-0444Q0009KE1T?

All three outputs are 100 MHz HCSL. The part is configured for three identical lanes — there is no programmable divider on the outputs.

What supply voltage does DSC400-0444Q0009KE1T need?

It accepts 2.25 V to 3.6 V, covering both 2.5 V and 3.3 V rails. The same part can be used across boards with different core voltages without a BOM change.

Does DSC400-0444Q0009KE1T have an enable/disable function?

Yes, the part includes an Enable/Disable pin. When disabled, the outputs go into a high-impedance state, which allows sharing the clock net with a redundant oscillator or powering down the clock tree during sleep modes.

What package does DSC400-0444Q0009KE1T come in?

It is supplied in a 20-VFQFN exposed-pad package measuring 5.00 mm x 3.20 mm with a 0.90 mm height. The exposed pad must be soldered to a thermal land on the PCB for proper heat dissipation and ground return.