Microchip DSC400 series MEMS XO, 4-output programmable oscillator, 100 MHz / 100 MHz / 66.666 MHz / 25 MHz, LVCMOS & LVDS, ±50 ppm stability, -40 to 85°C, 20-VFQFN exposed pad, tape & reel.
| Parameter | Value |
|---|---|
| Type | XO (Standard) |
| Series | DSC400 |
| Supply voltage | 2.25V ~ 3.6V |
| Frequency stability | ±50ppm |
| Frequency - output 1 | 100MHz |
| Frequency - output 2 | 100MHz |
| Frequency - output 3 | 66.666MHz |
| Frequency - output 4 | 25MHz |
| Operating temperature | -40°C~85°C |
| Height | 0.035\" (0.90mm) |
| Size (Dimension) | 0.197\" L x 0.126\" W (5.00mm x 3.20mm) |
| Output | LVCMOS, LVDS |
| Package | Tape & Reel (TR) |
| Function | Enable/Disable |
| Base resonator | MEMS |
| Case | 20-VFQFN Exposed Pad |
The DSC400-1133Q0079KI1T is a MEMS-based XO (Standard) that replaces up to four discrete quartz oscillators with a single 20-VFQFN package, generating 100 MHz, 100 MHz, 66.666 MHz, and 25 MHz outputs simultaneously.
Operating from 2.25 V to 3.6 V, the oscillator covers common 2.5 V and 3.3 V rails without an external regulator — useful when the board has multiple core voltages and the clock supply is the last rail to stabilize.
It can replace up to four discrete quartz oscillators in a single 20-VFQFN package, but the board layout must accommodate the exposed-pad footprint and the MEMS base resonator behaves differently under vibration and thermal shock — verify the output format (LVCMOS or LVDS) matches the downstream receiver.
The frequency stability is ±50 ppm across the operating temperature range and supply voltage window — tight enough for most Ethernet and PCIe reference clocks without external trimming.