page 1 of 1 doc md-72-0xx rev a i2c scl system power int/ to mcu if needed i2c sda power switch to other devices if needed r4 200k r4 200k r2 10k r2 10k u2 am1803 u2 am1803 vbat 5 7 scl nc 1 nc 2 nc 3 8 nc 6 sda nc 10 vss 9 psw/nirq2 4 fout/nirq 11 nc 12 13 vcc 14 vss xi 16 15 xo u1 cbc31xx u1 cbc31xx en gnd vbat vout vin reset vmode cn cp vchg gnd r1 10k r1 10k c3 1.0uf c3 1.0uf c1 1.0uf c1 1.0uf y1 32.768khz y1 32.768khz c2 0.1uf c2 0.1uf 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 ambiq am1803 real time clock how2 info sheet ambiq am1803 rtc power backup with enerchip? battery am1803 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) xxx xxx 4 x 5 xxx 7 x 7 xxx 9 x 9 documentation ? cymbet application note: an-xxxx ? cymbet evaluation kits: cbc-eval-05b , cbc-eval-06 ? data sheets: ambiq am1803 , 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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