MAX31328 datasheet(4/26 Pages) MAXIM

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MAX31328

±3.5ppm, I2C RTC with Integrated Crystal and

Power Management

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Maxim Integrated | 4

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

and TA = +25°C, unless otherwise noted.)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Input Leakage (SCL)

ILI

-1

µA

RST

̅̅̅̅̅ I/O Leakage

IOL

RST

̅̅̅̅̅ high impedance (Note 5)

-200

+10

µA

VBAT Leakage Current

(VCC active)

IBATLKG

VBAT = 3.0V

100

BATTERY (VCC = 0V, VBAT = 2.3V to 5.5V, TA = -40°C to +85°C, UNLESS OTHERWISE NOTED) (Note 1)

Active Battery Current

IBATA

EOSC

̅̅̅̅̅̅̅ = 0, BBSQW

= 0, SCL = 400kHz

(Note 4)

VBAT = 3V

μA

VBAT = 5.5V

150

Timekeeping Battery

Current

IBATT

EOSC

̅̅̅̅̅̅̅ = 0, BBSQW

= 0, EN32kHz = 0,

SCL = SDA = 0V or

VBAT (Note 4)

VBAT = 3V

660

3000

VBAT = 5.5V

820

3500

Temperature

Conversion Current

IBATTC

EOSC

̅̅̅̅̅̅̅ = 0, BBSQW

= 0, SCL = SDA =

0V or VBAT

VBAT = 3V

575

μA

VBAT = 5.5V

650

Data Retention Current

(Oscillator Stopped and

I2C Inactive)

IBATTDR

EOSC

̅̅̅̅̅̅̅ = 0, SCL = SDA = 0V, TA = +25°C

100

AC CHARACTERISTICS

POWER SWITCH (Figure 2)

Minimum VCC Fall Time;

VPF(MAX) to VPF(MIN)

tVCCF

300

μs

Minimum VCC Rise

Time; VPF(Min) to VPF(MAX)

tVCCR

μs

Recovery at Power-Up

tREC

(Note 12)

250

300

GENERAL (VCC = 2.3V to 5.5V or VBAT = 2.3V to 5.5V, VBAT > VCC, TA = -40°C to +85°C, UNLESS OTHERWISE NOTED)

(Note 2)

SCL Clock Frequency

fSCL

400

kHz

Bus Free Time Between

STOP and START

Conditions

tBUF

1.3

μs

Hold Time (Repeated)

START Condition

tHD:STA

(Note 6)

0.6

μs

Low Period of SCL

tLOW

1.3

μs

High Period of SCL

tHIGH

0.6

μs

Data Hold Time

tHD:DAT

(Note 7) (Note 8)

0.9

μs

Data Setup Time

tSU:DAT

(Note 9)

100

START Setup Time

tSU:STA

0.6

μs

Minimum Rise Time of

Both SDA and SCL

tRMIN

(Note 10)

20 +

0.1CB

Maximum Rise Time of

Both SDA and SCL

tRMAX

300

Minimum Fall Time for

Both SDA and SCL

tFMIN

(Note 11)

20 +

0.1CB

Maximum Fall Time for

Both SDA and SCL

tFMAX

300

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