The DSC6003HA1B-020.0000T is a 20 MHz MEMS-based oscillator from Microchip's DSC60XXB series, rated for -40°C to 125°C and AEC-Q100 qualified — this puts it in the under-hood automotive temperature band where quartz oscillators often drift or fail.
MEMS resonator vs quartz — shock and vibration tolerance
Absolute pull range of ±50 ppm gives the system clock enough margin for most automotive CAN, LIN, and Ethernet PHY tolerances.
The DSC6003 base product number covers a family of frequencies and options; the 20 MHz variant with enable/disable function is a standard catalog item, not a special order.
4-VFLGA — footprint and layout note
4-VFLGA package measures 1.60 mm x 1.20 mm with a seated height of 0.89 mm — this is a true chip-scale footprint that saves board space but demands a controlled solder-paste stencil for consistent fillet formation on the four land pads.