DS3231M datasheet(3/20 Pages) MAXIM

Part #	DS3231M

Description	짹5ppm, I2C Real-Time Clock

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Manufacturer	MAXIM [Maxim Integrated Products]

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±5ppm, I2C Real-Time Clock

3

AC ELECTRICAL CHARACTERISTICS—POWER SWITCH

(TA = -40NC to +85NC, unless otherwise noted.) (Figure 2)

DC ELECTRICAL CHARACTERISTICS—GENERAL (continued)

(VCC = +2.3V to +5.5V, TA = -40NC to +85NC, unless otherwise noted. Typical values are at VCC = +3.3V, VBAT = +3.0V, and TA =

+25NC, unless otherwise noted.)

DC ELECTRICAL CHARACTERISTICS—VBAT CURRENT CONSUMPTION

(VCC = 0V, VBAT = +2.3V to +5.5V, TA = -40NC to +85NC, unless otherwise noted. Typical values are at VCC = 0V, VBAT = +3.0V,

and TA = +25NC, unless otherwise noted.)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Power-Fail Voltage

VPF

2.45

2.575

2.70

V

Logic 0 Output

(32KHZ, INT/SQW, SDA)

VOL

IOL = 3mA

0.4

V

Logic 0 Output

(RST)

VOL

IOL = 1mA

0.4

V

Output Leakage

(32KHZ, INT/SQW, SDA)

ILO

-0.1

+0.1

µA

Input Leakage

(SCL)

ILI

-0.1

+0.1

µA

RST I/O Leakage

IOL

-200

+10

µA

VBAT Leakage

IBATLKG

25

100

nA

Temperature Accuracy

TEMPACC VCC or VBAT = +3.3V

Q

3

N

C

Temperature Conversion Time

tCONV

10

ms

Pushbutton Debounce

PBDB

250

ms

Reset Active Time

tRST

250

ms

Oscillator Stop Flag (OSF) Delay

tOSF

(Note 2)

125

200

ms

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Active Battery Current

(I2C Active) (Note 3)

IBATA

VBAT = +3.63V

70

µA

VBAT = VBATMAX

150

Timekeeping Battery Current

(I2C Inactive) (Note 3)

IBATT

VBAT = +3.63V, EN32KHZ = 0

2

3.0

µA

VBAT = VBATMAX, EN32KHZ = 0

2

3.5

Temperature Conversion Current

(I2C Inactive)

IBATTC

VBAT = +3.63V

575

µA

VBAT = VBATMAX

650

Data Retention Current

(Oscillator Stopped and I2C

Inactive)

IBATDR

TA = +25NC

100

nA

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

VCC Fall Time, VPFMAX to

VPFMIN

tVCCF

300

F

s

VCC Rise Time, VPFMIN to

VPFMAX

tVCCR

0

F

s

Recovery at Power-Up

tREC

(Note 4)

250

300

ms

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