Microchip lists the DSC1033BI1-048.0000T as Obsolete. The 4-SMD no-lead package and 3.3 V CMOS output make a functional equivalent search possible, but any substitute requires verifying the footprint and timing budget.
48 MHz MEMS oscillator — key ratings for clock-tree fit
A MEMS-based XO (Standard) with CMOS output, the DSC1033BI1-048.0000T delivers a 48 MHz clock at 3.3 V supply. Frequency stability is ±50 ppm — this sets the timing budget for the downstream PLL or serial interface; for a 48 MHz reference, ±50 ppm equals ±2.4 kHz absolute jitter allowance at the receiver.
Industrial temperature grade — deployment scope
Housed in a 4-SMD, No Lead package measuring 0.197" L x 0.126" W (5.00 mm x 3.20 mm) with a seated height of 0.035" (0.90 mm). The no-lead footprint means the solder pads are on the bottom of the package — the PCB land pattern must match the manufacturer's recommended layout to avoid tombstoning during reflow.