X49SD16MSD2SI
YXC Crystal Oscillators
Needs validationmedium risk
X49SD16MSD2SI matches the 16MHz 20pF HC-49US profile with wider temperature range.
Best Alternatives to X49SD16MSD2SC
X49SD16MSD2SC is a 16MHz 20pF HC-49US crystal unit. Same-frequency candidates exist, but pinout and motional parameters still need review.
AI replacement insight
Electrical riskmedium
ESR and drive level missing
Package riskmedium
HC-49US matches; height unknown
Firmware risklow
kept parts are 16MHz
Sourcing riskmedium
some lifecycles show '-'
Can it be replaced directly?
Direct replacement for X49SD16MSD2SC should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.
Best replacement path
Review X49SD16MSD2SI first, then X49SD16MSB2SI if tighter tolerance is acceptable.
Main risk
Pinout, ESR, drive level and mechanics were not verified from datasheets.
Recommended alternatives
2Alternative comparison matrix
| Feature / factor | X49SD16MSD2SC | X49SD16MSD2SI | X49SD16MSB2SI | Alt 3 | Compatibility / risk |
|---|---|---|---|---|---|
| Package | HC-49US | HC-49US | HC-49US | HC-49US — same catalog package; X49SD16MSB2SI: same catalog package | |
| Pinout | 2 pins | 2 pins | 2 pins | 2 pins — pin functions not checked; X49SD16MSB2SI: pin functions not checked | |
| Application | 16MHz, 20pF | 16MHz, 20pF | 16MHz, 20pF | 16MHz, 20pF — clock point matches; X49SD16MSB2SI: clock point matches | |
| Tolerance | ±20ppm | ±20ppm | ±10ppm | ±20ppm / ±10ppm — same tolerance; X49SD16MSB2SI: tighter nominal tolerance | |
| Temperature | -20 to +70C | -40 to +85C | -40 to +85C | -40 to +85C — wider range; X49SD16MSB2SI: wider range |
Application & sourcing insights
Questions & answers
Verified drop-in options for X49SD16MSD2SC are limited in the current batch. Review candidates marked Strong match or Datasheet verified, and validate package, pinout, and electrical limits before committing a BOM change.