
Functional alternative with matching frequency and load capacitance, but different package and higher ESR.
Find functional alternatives for the EPSON X1A0000610008 32.768 kHz crystal. Substitutes may require PCB layout and component changes due to package and electrical differences.
All candidates have different packages/pinouts (2-pin vs 4-pin), requiring a new PCB layout.
Candidates have different ESR or load capacitance, which can affect oscillator performance and requires circuit review.
The proposed alternatives are from major manufacturers and are actively produced.
No direct pin-to-pin replacement has been identified. All viable candidates require design review and likely a PCB revision.
Use a functional alternative like Seiko's SC-20S series, but verify the higher ESR and 2-pin package footprint.
The primary risk is the package and pinout mismatch, requiring a PCB redesign. Secondary risks include differences in ESR and load capacitance.

Functional alternative with matching frequency and load capacitance, but different package and higher ESR.
| Feature / factor | X1A0000610008 | SC-20S,32.768kHz,20PPM,9pF | G8327A043 | Alt 3 | Compatibility / risk |
|---|---|---|---|---|---|
| Frequency | 32.768 kHz | 32.768 kHz | 32.768 kHz | 32.768 kHz — Matches target frequency.; G8327A043: Matches target frequency. | |
| Load Capacitance | 9 pF | 9 pF | 7 pF | 9 pF / 7 pF — Matches target load capacitance.; G8327A043: Different load capacitance requires circuit changes. | |
| Esr | 75 kΩ Max. | 90 kΩ Max. | 70 kΩ Max. | 90 kΩ Max. / 70 kΩ Max. — Higher ESR may affect oscillator startup.; G8327A043: Lower ESR is an improvement. | |
| Package | 2.05 mm x 1.25 mm | SMD, 2.0x1.2mm | SMD, 2.0x1.2mm | SMD, 2.0x1.2mm — Different footprint requires layout change.; G8327A043: Different footprint requires layout change. | |
| Pinout | 4 | 2 | 2 | 2 — Not pin compatible.; G8327A043: Not pin compatible. |
Seiko's SC-20S (32.768kHz, 9pF) is a strong functional match but requires layout changes for its 2-pin package and verification of its slightly higher ESR.