Microchip DSC1104 series MEMS XO, 27 MHz, HCSL output, standby (power down) function, 2.25V–3.6V supply, ±50 ppm stability, –40°C to 105°C, 6-SMD no-lead 2.5mm × 2.0mm package.
| Parameter | Value |
|---|---|
| Type | XO (Standard) |
| Series | DSC1104 |
| Mounting | Surface Mount |
| Supply voltage | 2.25V ~ 3.6V |
| Current - supply | 42mA |
| Current - supply (Disable) | 95µA |
| Frequency | 27 MHz |
| Frequency stability | ±50ppm |
| Operating temperature | -40°C ~ 105°C |
| Size (Dimension) | 0.098\" L x 0.079\" W (2.50mm x 2.00mm) |
| Height - seated | 0.035\" (0.90mm) |
| Output | HCSL |
| Function | Standby (Power Down) |
| Package | Tube |
| Base resonator | MEMS |
| Case | 6-SMD, No Lead |
The operating voltage spans 2.25V to 3.6V, covering both 2.5V and 3.3V rails without an external LDO — one less part in the power tree. The 6-SMD no-lead package measures 2.50 mm × 2.00 mm with a seated height of 0.90 mm — small enough for space-constrained designs like small-form-factor NICs or industrial sensor modules. The 42 mA max supply current at 27 MHz is typical for an HCSL output stage driving a 50-Ω terminated differential pair.
The DSC1104 uses a MEMS resonator instead of a quartz crystal. MEMS oscillators typically start up faster (sub-millisecond vs millisecond for quartz), survive higher shock and vibration, and have a smaller footprint for the same frequency stability. The trade-off is that the phase-noise floor at very close-in offsets (below 1 kHz) can be higher than a good quartz OCXO, but for a 27 MHz HCSL reference driving a SerDes PLL, the ±50 ppm stability and jitter are adequate.
The DSC1104 and DSC1124 share the same MEMS resonator and package options, but the DSC1124 adds a spread-spectrum modulation feature to reduce EMI. The DSC1104 does not have spread spectrum — it outputs a clean fixed-frequency HCSL clock. If EMI reduction is needed, the DSC1124 is the functional alternative; otherwise the DSC1104 is the lower-cost choice for a standard HCSL reference.
The part number does not include a RoHS indicator suffix, but Microchip's DSC1104 series is manufactured RoHS-compliant and lead-free per the standard product marking. The 6-SMD no-lead package is compatible with lead-free reflow profiles.