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Microchip Technology DSC400-0404Q0007KE1T — Crystals & Oscillators

DSC400-0404Q0007KE1T MEMS XO – 100 MHz & 156.25 MHz HCSL

MPNDSC400-0404Q0007KE1T
Active

Microchip DSC400 series XO (Standard), MEMS-based, dual-output HCSL clock generator, 100 MHz and 156.25 MHz, ±50 ppm stability, 2.25-3.6 V supply, 20-VFQFN exposed pad package.

Microchip Technology DSC400-0404Q0007KE1T datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

DSC400-0404Q0007KE1T specifications
ParameterValue
TypeXO (Standard)
SeriesDSC400
Voltage2.25V ~ 3.6V
Frequency stability±50ppm
Frequency - output 1100MHz
Frequency - output 2156.25MHz
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

Dual HCSL clock source for PCIe and Ethernet reference

The DSC400-0404Q0007KE1T is a MEMS-based XO (Standard) that generates two fixed HCSL output frequencies: 100 MHz on output 1 and 156.25 MHz on output 2. These frequencies match the reference clock requirements for PCIe Gen1/2/3 and 10/25 GbE SerDes, making it a direct-fit clock source for a switch, router, or FPGA-based line card.

Stability and supply tolerance for serial-link timing

For a 100 MHz reference, ±50 ppm translates to a ±5 kHz absolute frequency error — well within the ±100 ppm capture range of a standard PCIe receiver PLL. The supply voltage range of 2.25 V to 3.6 V covers 2.5 V and 3.3 V rails commonly found on networking ASICs and FPGAs. The wide input tolerance means the oscillator can share a rail with the core logic without a dedicated LDO.

Housed in a 20-VFQFN with exposed pad, 5.00 mm x 3.20 mm body, 0.90 mm height.

Frequently asked questions

What are the exact output frequencies and waveform of DSC400-0404Q0007KE1T?

Output 1 is 100 MHz, output 2 is 156.25 MHz. Both outputs are HCSL (High-Speed Current Steering Logic), the differential signaling standard used for PCIe reference clocks.

Can DSC400-0404Q0007KE1T replace DSC400-0404Q0001KE1T?

The evidence does not list a DSC400-0404Q0001KE1T variant or its frequencies. Without a confirmed pinout and frequency match, treat the two as different order codes — verify the BOM's required output frequencies and the Enable/Disable logic polarity before substituting.