RX-8035LC
Real-time clock module by Epson
The RX-8035LC is a real-time clock module from Epson with a built-in 32.768 kHz crystal — no separate watch crystal on the board, no load capacitance and layout risk. Interface I²C, package LC · VSOJ-12, 3.6 × 2.8 mm, standby current 400 nA typ., accuracy ±5.0 / ±23 ppm @ +25 °C, operating range −40 … +85 °C. Supply from 1.0 V.
What the RX-8035LC can do
The tolerance figure applies at +25 °C. Over temperature the built-in crystal follows the usual parabola.
Order codes and datasheets
Every order code has its own printable datasheet with all recorded figures.
| TDE item | Epson designation |
|---|---|
| 91-0002 | RX-8035LC AC |
| 91-0119 | RX-8035LC B |
| 91-0120 | RX-8035LC B |
| 91-0121 | RX-8035LC B |
| 91-0122 | RX-8035LC B |
| 91-0123 | RX-8035LC AA/AC |
| 91-0124 | RX-8035LC AA/AC |
| 91-0125 | RX-8035LC AA/AC |
| 91-0126 | RX-8035LC AA/AC |
| 91-0128 | RX-8035LC AA/AC |
| 91-0129 | RX-8035LC AA/AC |
| 91-0130 | RX-8035LC AA/AC |
Alternatives in the Epson programme
If the RX-8035LC is not quite the right fit — these types come closest:
RX-4035LC
Same series, SPI instead of I²C. Otherwise largely identical figures.
RX-8035SA
The same series in the SA · SOP-14 package. 350 nA typ. · −40 … +85 °C
RX8901CE
If the clock has to hold over temperature as well: DTCXO, ±3.0 ppm over −40 … +85 °C (DTCXO).
All 40 families with filters for interface, package, standby current and temperature: real-time clock finder.
Frequently asked questions about the RX-8035LC
How accurate is the RX-8035LC?
±5.0 / ±23 ppm @ +25 °C. This figure applies at +25 degrees Celsius. Over temperature the built-in crystal follows the usual parabola — if the clock has to hold when hot and cold as well, a DTCXO type is the right choice.
How much current does the RX-8035LC draw in backup?
400 nA typ.. With a 225 mAh coin cell that is enough for many years of pure timekeeping on paper; the self-discharge of the cell usually becomes the limiting factor.
Which interface does the RX-8035LC use?
I²C. Package: LC · VSOJ-12, 3.6 × 2.8 mm.
Where can I buy the RX-8035LC in Europe?
Timing Devices Europe stocks the Epson RTC programme in its own warehouse in Ladenburg near Heidelberg, Germany — physically on site, not at the manufacturer. Samples, series demand and second-source assessment in one go, answered the same working day.
Enquire about the RX-8035LC.
We stock the Epson RTC programme in our own warehouse in Ladenburg near Heidelberg, Germany. Tell us tolerance grade, packing, quantity and date — answered the same working day.