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Microchip Technology DSC1122CI1-125.0000T — Crystals & Oscillators

DSC1122CI1-125.0000T 125 MHz LVPECL MEMS Oscillator -

MPNDSC1122CI1-125.0000T
Active

Microchip DSC1122 series XO (Standard) MEMS oscillator, 125 MHz LVPECL output, 2.25V–3.6V supply, -40°C to 85°C, 6-SMD no-lead package, Tape & Reel

Microchip Technology DSC1122CI1-125.0000T datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

DSC1122CI1-125.0000T specifications
ParameterValue
TypeXO (Standard)
SeriesDSC1122
MountingSurface Mount
Voltage2.25V ~ 3.6V
Current - supply58mA
Current - supply (Disable)22mA
Frequency125 MHz
Frequency stability±50ppm
Operating temperature-40°C~85°C
Size (Dimension)0.126\" L x 0.098\" W (3.20mm x 2.50mm)
Height - seated0.035\" (0.90mm)
OutputLVPECL
PackageTape & Reel (TR)
FunctionEnable/Disable
Base resonatorMEMS
Case6-SMD, No Lead

Product details

Active MEMS oscillator for 125 MHz LVPECL timing

The DSC1122CI1-125.0000T is an active-production XO (Standard) MEMS oscillator delivering a 125 MHz LVPECL output across a 2.25V to 3.6V supply range.

Package, footprint, and rework considerations

Housed in a 6-SMD no-lead package measuring 3.20mm x 2.50mm with a seated height of 0.90mm, the footprint matches the common 3.2x2.5 mm oscillator land pattern. No leads to bend or break — the part sits flat and reflows cleanly with a standard hot-air profile.

Supply rail flexibility and power budget

The 2.25V to 3.6V supply range lets this oscillator run directly off a 2.5V or 3.3V rail without an intermediate LDO.

The DSC1122 series remains a current design-in candidate. No pin-compatible second source is documented, but the 3.2x2.5 mm LVPECL oscillator market has several functional equivalents — confirm the Enable/Disable logic polarity and supply voltage tolerance before substituting.

Frequently asked questions

Is the DSC1122CI1-125.0000T a good replacement for a standard quartz oscillator?

Yes, in most applications. The MEMS resonator provides faster start-up and better long-term aging than quartz, with the same ±50 ppm stability. The 6-SMD footprint is a drop-in match for many 3.2x2.5 mm quartz oscillators, but verify the Enable/Disable pin function and supply voltage range match your existing BOM.

What is the footprint of the DSC1122CI1-125.0000T?

The package is 3.20mm x 2.50mm with a 0.90mm seated height — a standard 6-SMD no-lead oscillator footprint. The land pattern matches the common 3.2x2.5 mm oscillator layout used across the industry.

How does the DSC1122CI1-125.0000T compare to other 125 MHz LVPECL oscillators?

The key differentiator is the MEMS resonator: faster start-up, better shock and vibration tolerance, and no quartz aging drift. The 2.25V to 3.6V supply range is wider than many fixed-voltage LVPECL oscillators, which often require a 3.3V rail only. The ±50 ppm stability is standard for this class.