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Microchip Technology DSC400-0404Q0058KE2 — Crystals & Oscillators

DSC400-0404Q0058KE2 MEMS XO, HCSL, 100MHz, ±25ppm, Active

MPNDSC400-0404Q0058KE2
Active

Microchip DSC400 series, XO (Standard), MEMS base, 100 MHz HCSL output, ±25 ppm stability, 2.25–3.6 V supply, -20 to 70 °C, 20-VFQFN exposed pad, tube

Microchip Technology DSC400-0404Q0058KE2 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

DSC400-0404Q0058KE2 specifications
ParameterValue
TypeXO (Standard)
SeriesDSC400
Voltage2.25V ~ 3.6V
Frequency stability±25ppm
Frequency - output 1100MHz
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
PackageTube
FunctionEnable/Disable
Base resonatorMEMS
Case20-VFQFN Exposed Pad

Product details

HCSL output for PCIe and SerDes reference clocks

The DSC400-0404Q0058KE2 delivers a 100 MHz HCSL output — the standard logic family for PCIe reference clocks, requiring no external level translation when feeding a PCIe Gen1/2/3 PHY or a SerDes PLL.

Start-up time is typically under 5 ms, compared to 10–20 ms for a quartz-based XO — the system clock is valid before the FPGA finishes configuration.

Rated for 2.25 V to 3.6 V supply — the same BOM line works on a 2.5 V or 3.3 V rail without changing the oscillator order code. The -20 to 70 °C commercial range covers indoor telecom, office networking, and test equipment; for outdoor or engine-bay deployment, the DSC400 family includes wider-temperature variants.

Active lifecycle and package footprint

The 20-VFQFN exposed pad (5.00 mm × 3.20 mm, 0.90 mm height) requires a thermal via array under the pad for the exposed die attach — the datasheet layout recommendation keeps the junction temperature within the commercial range.

Frequently asked questions

Is DSC400-0404Q0058KE2 compatible with LVPECL receivers?

No — the output is HCSL (High-Speed Current Steering Logic). HCSL swings 700–900 mV peak-to-peak with a common-mode around 300–400 mV, while LVPECL requires a 1.6 V common-mode and 800 mV swing. A level translator or AC-coupling with bias resistors would be needed; for direct connection, stay with HCSL inputs.

Can DSC400-0404Q0058KE2 operate from a 2.5V supply?

Yes — the supply range is 2.25 V to 3.6 V, so a 2.5 V rail is within spec. The HCSL output swing scales with the supply; at 2.5 V the differential amplitude is typically 700 mV, still within the PCIe Gen1/2/3 receiver input range.

Is DSC400-0404Q0058KE2 a direct replacement for a standard crystal oscillator with the same frequency?

Only if the original oscillator has an HCSL output and the same footprint (20-VFQFN, 5.00 mm × 3.20 mm). Many quartz XOs use LVCMOS or LVPECL — those are not drop-in replacements. The MEMS base also means the supply decoupling and output termination may differ from a quartz design; check the DSC400 layout guide.

What is the difference between the DSC400 and DSC600 series?

The DSC400 is a multi-output MEMS oscillator (up to four independent frequencies), while the DSC600 is a single-output device. The DSC400-0404Q0058KE2 is a two-output variant (100 MHz on outputs 1 and 3). The DSC600 series offers a smaller package (2.5 mm × 2.0 mm) but only one clock output.