MEMS oscillator for automotive and industrial timing
The DSC1121CI5-045.0000 is a standard XO (crystal oscillator) built around a MEMS resonator rather than a quartz crystal, delivering a fixed 45 MHz output in CMOS logic levels. It is qualified to AEC-Q100, meaning it has passed the automotive-grade stress and reliability tests required for under-hood and cabin electronics.
Frequency stability and supply flexibility
Frequency stability is specified at ±10 ppm, which keeps the clock edge jitter within the budget for a 100BASE-TX Ethernet MAC or a CAN-FD controller without needing an external PLL cleanup. The supply voltage range spans 2.25V to 3.6V, letting the oscillator run from a 3.3V or 2.5V rail without a separate LDO — the internal regulator handles the drop. Maximum supply current is 35 mA when enabled and 22 mA when disabled — the disable function (Enable/Disable pin) cuts the output and reduces draw for power-save modes in battery-backed systems.
Surface-mount footprint and board integration
Packaged in a 6-SMD, No Lead (6-DFN) case measuring 3.20 mm x 2.50 mm with a seated height of 0.90 mm — the compact footprint frees board space alongside a microcontroller or PHY. Mounting is surface-mount only, reflow-solder compatible. The no-lead package requires a solder-paste stencil aperture matched to the pad geometry; a 0.50 mm pitch is not used here, so standard DFN layout rules apply.