20 MHz MEMS oscillator with standby — what it is
The DSC1033DE1-020.0000T is a 20 MHz XO (Standard) from Microchip's PureSilicon™ MEMS oscillator family. It delivers a CMOS output at 3.3 V with ±50 ppm frequency stability and includes a Standby (Power Down) function that drops supply current to 1 µA max. The base resonator is MEMS rather than quartz — this gives better shock and vibration tolerance and a faster start-up than a typical crystal oscillator, though the -20°C~70°C commercial temperature range limits it to indoor or controlled environments.
Obsolete — sourced through independent distribution
Microchip lists the DSC1033DE1-020.0000T as Obsolete. No official successor or pin-compatible second source is recorded from the original manufacturer. Available through independent surplus channels in lot-specific quantities.