MEMS oscillator for legacy 4.9152 MHz timing
The DSC1033DI1-004.9152T is a MEMS-based XO (Standard) oscillator from Microchip's PureSilicon™ series, delivering a 4.9152 MHz CMOS output from a 3.3 V supply. This frequency is a legacy telecom baud-rate multiple — common in UART clocking, serial-port controllers, and older modem or terminal equipment where a 1.8432 MHz crystal multiplied by 2.66 lands at 4.9152 MHz.
No pin-compatible successor or official cross-reference is listed by Microchip for this part. A board-level redesign may be required to migrate to a current-production oscillator with the same frequency and package footprint.
The 4-SMD, no-lead package measures 2.50 mm x 2.00 mm with a seated height of 0.90 mm — a compact footprint that reflows cleanly with standard lead-free profiles. The no-lead construction means the terminations are flush with the package edge; there is no exposed lead to inspect visually, so X-ray or boundary-scan is the only way to confirm solder-joint integrity after reflow. Under a hot-air station, the small thermal mass of this package means it heats quickly — a 300 °C nozzle at moderate airflow lifts the part in about 8–10 seconds without cooking adjacent components.