MEMS oscillator at 27 MHz — what it buys the clock tree
Microchip lists the DSC1033DI1-027.0000 as Obsolete.
Package and mounting — 4-SMD no-lead
Housed in a 4-SMD, No Lead package measuring 2.50 mm x 2.00 mm with a seated height of 0.90 mm.

Microchip Technology DSC1033DI1-027.0000, PureSilicon™ MEMS XO (Standard), 27 MHz CMOS output, ±50 ppm stability, 3.3 V supply, -40°C to 85°C, 4-SMD no-lead package
| Parameter | Value |
|---|---|
| Type | XO (Standard) |
| Series | DSC1033, PureSilicon™ |
| Mounting | Surface Mount |
| Supply voltage | 3.3V |
| Current - supply | 3mA (Typ) |
| Current - supply (Disable) | 1µA |
| Frequency | 27 MHz |
| Frequency stability | ±50ppm |
| Operating temperature | -40°C~85°C |
| Size (Dimension) | 0.098\" L x 0.079\" W (2.50mm x 2.00mm) |
| Height - seated | 0.035\" (0.90mm) |
| Output | CMOS |
| Package | Tube |
| Function | Standby (Power Down) |
| Base resonator | MEMS |
| Case | 4-SMD, No Lead |
Microchip lists the DSC1033DI1-027.0000 as Obsolete.
Housed in a 4-SMD, No Lead package measuring 2.50 mm x 2.00 mm with a seated height of 0.90 mm.
Microchip has not published an official successor for this specific order code. For a new design, consider a current-production MEMS oscillator from the DSC1033 family with the same 27 MHz frequency, CMOS output, 3.3 V supply, and 4-SMD footprint — confirm pin compatibility and standby function against the datasheet before substituting.