RV-3149-C3
Epson alternative: RA4000CE
You want to replace the RV-3149-C3 from Micro Crystal — as a second source, because of availability, or because a new design is coming up. Here the type is set against the closest Epson type feature by feature, with the points that speak for and against the change.
Features of the RV-3149-C3: the SPI counterpart to the RV-3129-C3, up to +125 °C, 8 B RAM / 2 B EEPROM.
RV-3149-C3 versus RA4000CE
| RV-3149-C3 — Micro Crystal | RA4000CE — Epson | |
|---|---|---|
| Manufacturer | Micro Crystal | Epson (Seiko Epson) |
| Status | Active series type | Active series type |
| Interface | SPI | SPI |
| Crystal integrated | yes | yes, factory calibrated |
| Standby current | 800 nA at 3 V | 300 nA typ. · 1700 nA max. |
| Accuracy | ±6 ppm | ±5.0 ppm (−40…+85 °C) · ±8.0 (…+105) · ±50 (…+125) — DTCXO |
| Temperature compensation | yes (DTCXO/TCXO) | yes (DTCXO) |
| Supply | 1.3 – 5.5 V | 1.6–5.5 V |
| Max. temperature | +125 °C | −40 … +125 °C |
| Package | C3 · 3.7 × 2.5 × 0.9 mm | CE · 3.2 × 2.5 × 1.0 mm |
What speaks for and against the change
We sell Epson — and we still say where the competitor is better. You would notice it at the first datasheet comparison anyway.
Honestly
- Usable up to +125 °C
The difference
- 800 nA against 300 nA typ. on the RA4000CE
- AEC-Q100 only from Epson
- ±6 ppm against ±5.0 ppm
Frequently asked questions
What is the Epson alternative to the RV-3149-C3?
The closest match is the RA4000CE, with the RX4901CE as a second option. It is not a drop-in replacement: package, pinout and register map differ, so layout and firmware have to be adapted. What you get in return is set out in the comparison on this page.
Who supplies an alternative to the RV-3149-C3 in Europe?
Timing Devices Europe in Ladenburg near Heidelberg, Germany stocks the complete Epson RTC programme in its own warehouse — physically on site, not at the manufacturer. Samples, comparison and series demand in one go, answered the same working day.
Samples and a comparison for the RV-3149-C3.
Tell us which version you use today, together with quantity and date. We will put together the Epson equivalent with its datasheet and the migration effort — from our own warehouse in Ladenburg near Heidelberg, Germany.