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Microchip Technology DSC400-4444Q0059KI2 — Crystals & Oscillators

DSC400-4444Q0059KI2 XO HCSL 100/125 MHz Quad Output

MPNDSC400-4444Q0059KI2
Active

Microchip DSC400-4444Q0059KI2, XO (Standard) MEMS oscillator, quad HCSL outputs at 100 MHz and 125 MHz, ±25 ppm stability, 2.25V–3.6V supply, -40°C to 85°C, 20-VFQFN exposed pad package.

Microchip Technology DSC400-4444Q0059KI2 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

DSC400-4444Q0059KI2 specifications
ParameterValue
TypeXO (Standard)
SeriesDSC400
Supply voltage2.25V ~ 3.6V
Frequency stability±25ppm
Frequency - output 1100MHz, 125MHz
Frequency - output 2100MHz, 125MHz
Frequency - output 3100MHz, 125MHz
Frequency - output 4100MHz, 125MHz
Operating temperature-40°C~85°C
Height0.035\" (0.90mm)
Size (Dimension)0.197\" L x 0.126\" W (5.00mm x 3.20mm)
OutputHCSL
PackageTube
FunctionEnable/Disable
Base resonatorMEMS
Case20-VFQFN Exposed Pad

Product details

Quad HCSL clock source for PCIe and Ethernet reference

HCSL is the standard output type for PCIe reference clocks, and the 100/125 MHz frequencies cover PCIe Gen1-3 and 1GbE/10GbE reference requirements from a single device.

Operating from 2.25V to 3.6V, the oscillator can run on a 2.5V or 3.3V rail without an external LDO, simplifying the power tree.

Package footprint and thermal pad planning

The 20-VFQFN Exposed Pad package measures 5.00mm x 3.20mm with a 0.90mm height. The 0.50mm pitch QFN footprint requires a solder-paste stencil aperture that matches the pad size to avoid bridging.

Frequently asked questions

What is the output type of the DSC400-4444Q0059KI2?

The output type is HCSL (High-Speed Current Steering Logic), which is the standard for PCIe reference clocks. It is not a CMOS or LVDS output.