100 MHz MEMS oscillator — what it delivers
The DSC1018BC1-100.0000 is a 100 MHz MEMS-based XO (standard oscillator) from Microchip's DSC1018 series, delivering a CMOS output on a single 1.8 V supply rail. Frequency stability is held to ±50 ppm across the 0°C~70°C commercial temperature range, which suits indoor, office, and appliance environments where the ambient stays conditioned. The MEMS resonator core gives this oscillator better shock and vibration tolerance than a quartz fundamental — relevant if the board sees handling in assembly or moderate mechanical stress in service.
Obsolete — sourcing reality for this BOM line
Microchip lists the DSC1018BC1-100.0000 as Obsolete. Existing BOM lines can be filled through independent surplus channels; quantities are lot-specific and confirmed at RFQ. No official successor or pin-compatible replacement is recorded from Microchip for this exact order code.
Standby function and disable current
A Standby (Power Down) function disables the output and drops the supply current to 1 µA max — useful for power-gated clock trees where the oscillator is stopped during sleep modes. Active supply current is 5 mA typ at 100 MHz, a low figure for a MEMS oscillator at this frequency, keeping the thermal contribution to the board minimal.
Package and board integration note
Housed in a 4-SMD, no-lead package measuring 5.00 mm x 3.20 mm with a seated height of 0.90 mm. Surface-mount mounting — the pad layout follows the standard 4-pin oscillator pattern; no special via-in-pad or thermal relief beyond typical SMD practice.