CBC34123 EnerChip™ RTC

©2012 Cymbet Corporation • Tel: +1-763-633-1780 • www.cymbet.com

DS-72-31 V.08

Page 3 of 9

Preliminary

Pin Number

Label

Description

1

OSCO

Oscillator output; high-impedance node; minimize wire length between

quartz and package

2

TEST

Testpin;notuseraccessible;connecttoVSSorleavefloating(internally

pulled down)

3

INT/

Interruptoutput(open-drain;activeLOW)

4

CE

Chipenableinput(activeHIGH)withinternalpulldown

5

VSS

Ground

6

VCHG

4.1V(typical)chargingsource-connecttoVBATand/oroptionalEnerChip(s)

7

VEC

Positiveterminalofintegratedthinfilmbattery-connecttoVCHGandnoth-

ing else

8

SDO

Serial data output, push-pull; high-impedance when not driving; can be con-

nected to SDI for single wire data line

9

SDI

Serialdatainput;mayfloatwhenCEisinactive

10

SCL

Serialclockinput;mayfloatwhenCEisinactive

11

CLKOE

CLKOUTenableordisablepin;enableisactiveHIGH;connecttoVSSforlow

power operation

12

CLKOUT

Clockoutput(open-drain)

13

VDD

Supply voltage; positive or negative steps in VDD can affect oscillator perfor-

mance;recommend100nFdecouplingclosetothedevice(seeFig.30)

14

RESET/

Output signal indicating RTC is operating in backup power mode

15

EN

Chargepumpenable;activatesVCHG4.1V(typ.)chargingsource

16

OSCI

Oscillator input; high-impedance node; minimize wire length between quartz

and package

CBC34123 Input/Output Descriptions

Figure 4: CBC34123 Package (left: top view, looking through package; right: pad dimensions)

EnerChip Properties

Energy capacity (typical):

5µAh

Recharge time to 80%:

10 minutes

Charge/discharge cycles:

>5000 to 10% depth-of-discharge

Operating temperature:

-20°C to +70°C

Storage temperature:

-40°C to +125°C

Minimum VDD to charge EnerChip:

2.5V

Package

Dimensions

(mm)