64 MHz MEMS XO — now obsolete
Microchip's DSC1033DI1-064.0000T is a 64 MHz MEMS-based oscillator (XO) with CMOS output, ±50ppm frequency stability, and a standby power-down function that drops supply current to 1 µA max. Runs on a single 3.3 V rail, draws 4 mA typical at 64 MHz, and lives in a 2.50 mm × 2.00 mm 4-SMD no-lead package — a footprint that fits tight clock trees on industrial PCBs.
The industrial temperature grade (-40°C to 85°C) means it was originally deployed in outdoor telecom, factory-floor controllers, and engine-bay modules — environments where a dead oscillator stops the whole board. The scorch mark tells you: when the clock stops, the system is down.
Standby power-down and package fit
The 4-SMD, No Lead package measures 2.50 mm × 2.00 mm with a seated height of 0.90 mm max. No exposed paddle, no thermal pad to worry about — just a standard reflow profile for a small ceramic land pattern.