Why a MEMS oscillator instead of quartz
The DSC1121AM1-020.0000 uses a MEMS resonator rather than a quartz crystal — the silicon structure is inherently more resistant to shock and vibration than a quartz blank, and startup is nearly instantaneous with no crystal start-up time to budget.
Supply voltage and output — one part fits 2.5V and 3.3V rails
The 2.25V to 3.6V supply range means the same order code works on a 2.5V FPGA bank or a 3.3V microcontroller rail — no need to qualify a separate voltage variant. CMOS output swings rail-to-rail, so the rising edge into a 15 pF load is clean enough for a 20 MHz clock tree without an external buffer.
Package and board layout — 6-VDFN with exposed pad
Enable/Disable function on pin 1 lets the system shut down the oscillator without a separate load switch — useful for power-sensitive designs that clock-gate the peripheral.
Lifecycle status and sourcing
Suitable for new designs and production builds. Sourced through independent distribution; quoted to order against the BOM quantity.