RV-3032-C7
Epson alternative: RX8901CE
You want to replace the RV-3032-C7 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-3032-C7: temperature sensor with window interrupt, backup switch, trickle charger with charge pump, event input with time stamp, password protection, 16 B RAM / 32 B EEPROM.
RV-3032-C7 versus RX8901CE
| RV-3032-C7 — Micro Crystal | RX8901CE — Epson | |
|---|---|---|
| Manufacturer | Micro Crystal | Epson (Seiko Epson) |
| Status | Active series type | Active series type |
| Interface | I²C | I²C |
| Crystal integrated | yes | yes, factory calibrated |
| Standby current | 160 nA at 3 V | 240 nA typ. · 1500 nA max. |
| Accuracy | ±2.5 ppm over −40 … +85 °C (DTCXO) | ±3.0 ppm over −40 … +85 °C (DTCXO) |
| Temperature compensation | yes (DTCXO/TCXO) | yes (DTCXO) |
| Supply | 1.3 – 5.5 V | 1.6–5.5 V · timekeeping down to 1.1 V |
| Max. temperature | +105 °C | −40 … +105 °C |
| Package | C7 · 3.2 × 1.5 × 0.8 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
- Smaller package: 4.8 mm² against 8.0 mm² for the Epson CE
- Lower standby current: 160 nA against 240 nA
- Readable temperature sensor with a programmable temperature window
The difference
- At ±3.0 ppm over −40 … +85 °C Epson is marginally more accurate than the ±2.5 ppm that Micro Crystal holds only up to +85 °C — above that the RV-3032-C7 falls back to ±20 ppm
- 32 time stamps on the RX8901CE against a single event input
- AEC-Q100 only from Epson (RA8000CE) — Micro Crystal qualifies to AEC-Q200
- 256 bytes of SRAM and self-monitoring on the RX8901CE
Frequently asked questions
What is the Epson alternative to the RV-3032-C7?
The closest match is the RX8901CE, with the RA8000CE 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-3032-C7 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-3032-C7.
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.