Skip to main content
Log in
Microchip Technology DSC400-0344Q0051KE1T — Crystals & Oscillators

DSC400-0344Q0051KE1T MEMS XO – 100 MHz / 156.25 MHz HCSL

MPNDSC400-0344Q0051KE1T
Active

Microchip DSC400 series, XO (Standard), MEMS base resonator, quad-frequency outputs: 100 MHz, 156.25 MHz, 156.25 MHz, HCSL/LVDS selectable, ±50 ppm stability, -20 to 70 °C, 20-VFQFN exposed pad, tape & reel.

Microchip Technology DSC400-0344Q0051KE1T datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

DSC400-0344Q0051KE1T specifications
ParameterValue
TypeXO (Standard)
SeriesDSC400
Voltage2.25V ~ 3.6V
Frequency stability±50ppm
Frequency - output 1100MHz
Frequency - output 2156.25MHz
Frequency - output 3156.25MHz
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, LVDS
PackageTape & Reel (TR)
FunctionEnable/Disable
Base resonatorMEMS
Case20-VFQFN Exposed Pad

Product details

MEMS XO with quad-frequency plan for multi-rate clock trees

The DSC400-0344Q0051KE1T: Each output can be independently configured as HCSL or LVDS, making this oscillator a single-component clock source for FPGA banks that need both a 100 MHz reference and 156.25 MHz for 10G Ethernet or PCIe Gen3 SerDes.

Operating from 2.25 V to 3.6 V, the oscillator runs off a common 2.5 V or 3.3 V rail without an extra LDO — the wide tolerance covers the output ripple of a typical switching regulator. The -20 to 70 °C commercial temperature grade suits indoor telecom racks, office networking gear, and test equipment. For outdoor or engine-bay environments, the DSC400 family offers industrial-temp variants; this specific order code is not rated beyond 70 °C.

The 20-VFQFN exposed-pad package measures 5.00 mm × 3.20 mm with a 0.90 mm seated height.

Frequently asked questions

Is the DSC400-0344Q0051KE1T a direct replacement for a standard 100 MHz LVDS oscillator?

Yes, for the 100 MHz output lane it can replace a single-output 100 MHz LVDS XO, but the DSC400-0344Q0051KE1T is a quad-output device with three additional frequencies (two at 156.25 MHz). The 20-VFQFN package and the enable/disable function are not pin-compatible with a standard 4-pin 7×5 mm oscillator — a board layout change is required.

What is the closest pin-compatible alternative to the DSC400-0344Q0051KE1T in the DSC400 family?

The DSC400 family shares the same 20-VFQFN footprint and supply range. Any other DSC400 order code with the same package and pinout is a direct mechanical replacement, but the output frequencies and stability grade differ. Check the base product number and the full order code for the specific frequency plan.