21-0042 查看數據表（PDF） - Maxim Integrated

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21-0042

I2C Serial Real-Time Clock

Maxim Integrated 

AC ELECTRICAL CHARACTERISTICS

(VCC = MIN to MAX, TA = -40°C to +85°C.) (Note 9)

PARAMETER

SYMBOL

CONDITION

SCL Clock Frequency

Fast mode

fSCL

Standard mode

Bus Free Time Between a STOP

and START Condition

Hold Time (Repeated) START

Condition (Note 10)

LOW Period of SCL Clock

tBUF

tHD:STA

tLOW

Fast mode

Standard mode

Fast mode

Standard mode

Fast mode

Standard mode

HIGH Period of SCL Clock

tHIGH

Fast mode

Standard mode

Setup Time for a Repeated

START Condition

Data Hold Time (Notes 11, 12)

Data Setup Time (Note 13)

Rise Time of Both SDA and SCL

Signals (Note 14)

Fall Time of Both SDA and SCL

Signals (Note 14)

Setup Time for STOP Condition

tSU:STA

tHD:DAT

tSU:DAT

tR

tF

tSU:STO

Fast mode

Standard mode

Fast mode

Standard mode

Fast mode

Standard mode

Fast mode

Standard mode

Fast mode

Standard mode

Fast mode

Standard mode

Capacitive Load for Each Bus

Line (Note 14)

CB

I/O Capacitance (SDA, SCL)

CI/O

(Note 9)

Oscillator Stop Flag (OSF) Delay

tOSF

(Note 15)

DS1339 I2C Serial Real-Time Clock

MIN TYP

100

1.3

4.7

0.6

4.0

1.3

4.7

0.6

4.0

0.6

4.7

0

0

100

250

20 + 0.1CB

20 + 0.1CB

20 + 0.1CB

20 + 0.1CB

0.6

4.0

100

MAX

400

100

UNITS

kHz

µs

µs

µs

µs

µs

0.9

µs

ns

300

ns

1000

300

ns

300

µs

400

pF

10

pF

ms

4 of 20

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