DS3231MZ/V 查看數據表（PDF） - Maxim Integrated

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DS3231MZ/V

±5ppm, I2C Real-Time Clock

Maxim Integrated 

±5ppm, I2C Real-Time Clock

AC ELECTRICAL CHARACTERISTICS—I2C INTERFACE

(VCC or VBAT = +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.) (Note 5, Figure 1)

PARAMETER

SCL Clock Frequency

Bus Free Time Between STOP

and START Conditions

SYMBOL

fSCL

tBUF

CONDITIONS

MIN TYP MAX UNITS

0

400

kHz

1.3

Fs

Hold Time (Repeated) START

Condition

tHD:STA

0.6

Fs

Low Period of SCL

High Period of SCL

Data Hold Time

Data Set-Up Time

START Set-Up Time

SDA and SCL Rise Time

tLOW

tHIGH

tHD:DAT

tSU:DAT

tSU:STA

tR

(Note 6)

1.3

0.6

0

100

0.6

20 +

0.1CB

Fs

Fs

0.9

Fs

ns

Fs

300

ns

SDA and SCL Fall Time

tF

(Note 6)

20 +

0.1CB

300

ns

STOP Set-Up Time

tSU:STO

0.6

Fs

SDA, SCL Input Capacitance

CBIN (Note 7)

10

pF

Note 1: All voltages are referenced to ground.

Note 2: The parameter tOSF is the period of time the oscillator must be stopped for the OSF flag to be set.

Note 3: Includes the temperature conversion current (averaged).

Note 4: This delay applies only if the oscillator is enabled. If the EOSC bit is 1, tREC is bypassed and RST immediately goes high.

The state of RST does not affect the I2C interface or RTC functions.

Note 5: Interface timing shown is for fast-mode (400kHz) operation. This device is also backward-compatible with standard mode

I2C timing.

Note 6: CB: Total capacitance of one bus line in picofarads.

Note 7: Guaranteed by design; not 100% production tested.

4

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