For a pin-compatible replacement within the same DSC1001 series, a different frequency variant or a newer MEMS oscillator from Microchip's portfolio may be considered – verify the exact frequency and stability requirements before substituting.
The MEMS resonator provides inherent shock and vibration immunity compared to quartz, which matters for engine-bay or chassis-mounted modules. The 1.2 MHz CMOS output with ±25 ppm frequency stability keeps the clock edge jitter within the timing budget for a 12 V battery-powered ECU running a 1.2 MHz SPI bus or a low-speed CAN controller.
Housed in a 4-SMD, No Lead package measuring 2.50 mm x 2.00 mm with a seated height of 0.90 mm. The 0.098" x 0.079" footprint is standard for MEMS oscillators of this class. Surface-mount reflow profile follows JEDEC J-STD-020; no special via-in-pad or thermal pad is required.