
NDK America, Inc.
Same NDK 32.768 kHz series option, but 6 pF CL needs circuit review.
NX3215SA-32.768K-STD-MUA-8 is a 32.768 kHz NDK tuning-fork crystal with 12.5 pF load. Alternatives need CL, ESR, footprint, and startup checks.
CL and ESR affect oscillator startup and accuracy.
2-SMD class is not enough to prove footprint.
Passive crystal usually has no firmware impact.
Kept NDK candidates are Active.
Direct replacement for NX3215SA-32.768K-STD-MUA-8 should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.
Start with same NX3215SA series options, but review load capacitance changes.
Load capacitance mismatch can shift RTC accuracy or startup margin.

NDK America, Inc.
Same NDK 32.768 kHz series option, but 6 pF CL needs circuit review.
| Feature / factor | NX3215SA-32.768K-STD-MUA-8 | NX3215SA-32.768K-STD-MUA-14 | NX3215SA-32.768K-STD-MUA-9 | ABS05-32.768kHz-T | Compatibility / risk |
|---|---|---|---|---|---|
| Application | 12.5 pF CL | 6 pF CL | 9 pF CL | 32.768 kHz, 12.5 pF | 6 pF CL / 9 pF CL / 32.768 kHz, 12.5 pF — oscillator caps may change; NX3215SA-32.768K-STD-MUA-9: RTC accuracy risk; ABS05-32.768kHz-T: same CL and frequency |
| Package | 2-SMD, 3.2x1.5x0.8 | 2-SMD, 3.2x1.5 | 3.2x1.5x0.9 mm | 1.6x1.0x0.5 mm | 2-SMD, 3.2x1.5 / 3.2x1.5x0.9 mm / 1.6x1.0x0.5 mm — height/footprint need check; NX3215SA-32.768K-STD-MUA-9: taller part; ABS05-32.768kHz-T: not footprint compatible |
| Pinout | 2 pins | 2 pins | - | - | 2 pins — pin function not verified |
| Temperature | -40 to +85 C | -40 to +85 C | -40 to +85 C | -40 to +85 C | -40 to +85 C — same range; NX3215SA-32.768K-STD-MUA-9: same range; ABS05-32.768kHz-T: same range |
| Resistance | 70 kOhm max ESR | - | 70 kOhm max ESR | 90 kOhm ESR | 70 kOhm max ESR / 90 kOhm ESR — same ESR limit; ABS05-32.768kHz-T: startup margin risk |
| Tolerance | ±20 ppm | - | - | ±20 ppm | ±20 ppm — same tolerance |
Verified drop-in options for NX3215SA-32.768K-STD-MUA-8 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.