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Microchip Technology DSC1001CI2-073.7280T — Crystals & Oscillators

DSC1001CI2-073.7280T MEMS XO 73.728 MHz CMOS AEC-Q100 -

MPNDSC1001CI2-073.7280T
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Microchip DSC1001CI2-073.7280T, XO (Standard) MEMS oscillator, 73.728 MHz CMOS output, ±25 ppm frequency stability, 1.8V–3.3V supply, AEC-Q100 qualified, -40°C to 85°C, 4-SMD no-lead package.

Microchip Technology DSC1001CI2-073.7280T datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

DSC1001CI2-073.7280T specifications
ParameterValue
TypeXO (Standard)
SeriesDSC1001
MountingSurface Mount
Supply voltage1.8V ~ 3.3V
Current - supply8.7mA
Current - supply (Disable)15µA
Frequency73.728 MHz
Frequency stability±25ppm
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)
OutputCMOS
PackageTape & Reel (TR)
RatingsAEC-Q100
FunctionStandby (Power Down)
Base resonatorMEMS
Case4-SMD, No Lead

Product details

73.728 MHz MEMS XO — automotive-grade CMOS clock source

The DSC1001CI2-073.7280T is a MEMS-based XO (Standard) oscillator delivering a fixed 73.728 MHz CMOS output — a common reference frequency for 1000BASE-T Ethernet PHYs, video pixel clocks, and SerDes reference paths. The 1.8V to 3.3V supply range lets a single part number serve multiple voltage domains on the same BOM — one oscillator for a 1.8V FPGA bank and a 3.3V PHY, no level translation.

AEC-Q100 qualification — under-hood and cabin deployment

The standby (power-down) pin pulls the oscillator current to 15 µA max — the output enters high-impedance state, letting the clock tree float without contention.

Frequently asked questions

Is DSC1001CI2-073.7280T AEC-Q100 qualified?

Yes, it carries AEC-Q100 rating.

How does DSC1001CI2-073.7280T compare to a standard quartz crystal oscillator?

The MEMS resonator is more resistant to shock and vibration than a quartz crystal. The ±25 ppm stability is comparable to a standard quartz XO, but the MEMS part typically has lower jitter and faster start-up. The supply range (1.8V–3.3V) is wider than most fixed-voltage quartz oscillators.

What is the function of the standby pin on DSC1001CI2-073.7280T?

The Standby (Power Down) function disables the output and drops supply current to 15 µA max. The output goes high-impedance, so multiple oscillators can share a clock line without bus contention when one is disabled.

Can DSC1001CI2-073.7280T be used as a replacement for a failed oscillator in an existing circuit?

If the original was a 73.728 MHz CMOS-output XO in a 4-SMD no-lead package with a 1.8V–3.3V supply, then yes — the pinout and footprint match the standard 3.2 mm x 2.5 mm oscillator land pattern. Confirm the original's supply voltage and enable logic before substituting.