MEMS oscillator core and key ratings
The DSC1033CI1-033.3330T: A MEMS-based XO (Standard) in the DSC1033 PureSilicon series, this part delivers a 33.333 MHz CMOS output from a 3.3 V supply rail. For a UART or SPI clock at 33.333 MHz, ±50 ppm corresponds to roughly ±1.7 kHz of absolute frequency error — well within the tolerance of most serial interfaces, but worth checking if the system uses a narrow-band PLL that multiplies this jitter. Normal operation draws 3 mA typ from the 3.3 V rail. This makes the part suitable for battery-powered designs that sleep the oscillator between active bursts — a sensor node waking every few seconds to transmit a packet, for example.
Package footprint and layout note
Housed in a 4-SMD, No Lead package measuring 3.20 mm × 2.50 mm with a seated height of 0.90 mm. The 0.126" × 0.098" footprint is common across many MEMS and quartz oscillators — a 4-pin land pattern with a centre ground pad. The low profile suits tight vertical clearance in 1U rack equipment or portable enclosures.