i2c scl system power i2c sda int/ r3 100k r3 100k c3 1.0uf c3 1.0uf c1 1.0uf c1 1.0uf u1 enerchip cbc31xx u1 enerchip cbc31xx en gnd vbat vout vin reset vmode cn cp vchg gnd r2 10k r2 10k r1 10k r1 10k c2 0.1uf c2 0.1uf u2 epson RX-8564 u2 epson RX-8564 int 5 gnd 6 scl 10 sda 7 clkoe 11 clkout 9 vdd 10 page 1 of 1 doc md-72-0xx rev a page 1 of 1 doc md-72-0xx rev a ?2013 cymbet corporation ? tel: +1-763-633-1780 ? www.cymbet.com cymbet, the cymbet logo and enerchip are trademarks of cymbet corporation. all rights reserved applications enerchips are an attractive rtc backup alternative to batteries or supercapacitors, especially when the finished product has limited pcb space, size constraints or needs to be sealed or installed in a hard-to- reach location. they are also excellent if you have any of these design requirements: ? battery must be rohs and weee compliant ? product can be discarded without removing battery ? product must have battery installed during shipping via air ? battery must be rechargeable to support a lifetime of power outages ? battery must provide backup power for several hours during a main power failure advantages of combining these two parts cymbet enerchips are solid-state, rechargeable batteries with the following characteristics when compared to conventional rechargeable batteries: ? low self-discharge ? are solder reflow tolerant ? flat discharge voltage profile ? high charge/discharge cycle life ? simple voltage controlled charging ? have no flammable solvents to leak or catch fire ? are offered in low profile surface mount packages epson RX-8564 real time clock how2 info sheet epson RX-8564 rtc power backup with enerchip? battery RX-8564 cbc3105 cbc3112 cbc3150 iq (na at 3v) back up time (hrs) package size (mm x mm) back up time (hrs) package size (mm x mm) back up time (hrs) package size (mm x mm) 275 18 4 x 5 44 7 x 7 182 9 x 9 documentation ? cymbet application note: an-1042 ? cymbet evaluation kits: cbc-eval-05b , cbc-eval-06 ? data sheets: epson RX-8564 , cbc3105 , cbc3112 , cbc3150 ? all cymbet documents and downloads: http://www.cymbet.com/products/datasheets-downloads.php evaluation kits ?2013 cymbet corporation ? tel: +1-763-633-1780 ? www.cymbet.com cymbet, the cymbet logo and enerchip are trademarks of cymbet corporation. all rights reserved
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