What this 1 MHz MEMS oscillator brings to an automotive board
The DSC1004AL1-001.0000T is a 1 MHz MEMS-based oscillator from Microchip's DSC1004 series, delivering a CMOS clock output with ±50 ppm stability across -40°C to 105°C. The AEC-Q100 qualification places it squarely in automotive-grade timing — suitable for engine bay, cabin, or chassis-domain ECUs where a quartz crystal might drift or fail under vibration. The standby (power-down) function drops supply current to 15 µA max when the enable pin is pulled low, letting the ECU gate the clock in sleep mode without a separate load switch. Active draw is 6.5 mA max at 1.8V–3.3V supply — low enough for a shared 3.3V rail on a mixed-signal board.
Package, footprint, and the rework bench reality
Housed in a 4-SMD, no-lead exposed-pad package measuring 7.00mm x 5.00mm with a seated height of 0.90mm. Surface-mount rework with hot air is straightforward; the pad pitch is generous enough that a standard fine-tip iron can touch up a lifted pad.
Lifecycle and sourcing for production and repair
The DSC1004 series is a current Microchip catalog line, so new designs can commit to it without an imminent last-time-buy window. For a repair bench pulling a dead oscillator off an automotive controller board, this is the exact drop-in replacement; no pin-compatible second source is listed, but the MEMS construction means it's less prone to the mechanical shock failures that take out quartz cans.