external RTC chip recommandation?

Hi all,

onboard RTC draws too much current,

need to have low current RTC chip, no need to be super accurate, low cost is the prime concern. has suggestions?

The DS1302 are DS1307 most common, reasonably low cost.
Adafruit has breakout boards and drivers for the DS1307, so you could use that as a reference design.
Both are I2C bus devices, independently powered from the bus.
Run for years from a little watch battery.

Old Dallas Semiconductor parts, now supplied by Maxim Integrated.

— Graham

Hi all,

onboard RTC draws too much current,

onboard RTC? What board are you using? I’m familiar with the BBB not having any onboard RTC.

need to have low current RTC chip, no need to be super accurate, low cost is the prime concern. has suggestions?

you could evaluate the following for use: MAXIMIC DS1307, MAXIMIC DS3231, TI BQ32000, and NXP PC85063TP

onboard RTC? What board are you using? I’m familiar with the BBB not having any onboard RTC.

It’s actually on die, and it’s pretty much useless, as there is no way to battery back it.

AM335x has an onboard RTC, drains battery like crazy…

Thanks for the suggestions.