21-0036 datasheet(4/20 Pages) MAXIM

Part #	21-0036

Description	I2C Serial Real-Time Clock

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Manufacturer	MAXIM [Maxim Integrated Products]

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DS1339 I

2C Serial Real-Time Clock

4 of 20

AC ELECTRICAL CHARACTERISTICS

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

PARAMETER

SYMBOL

CONDITION

MIN

TYP

MAX

UNITS

SCL Clock Frequency

fSCL

Fast mode

100

400

kHz

Standard mode

100

Bus Free Time Between a STOP

and START Condition

tBUF

Fast mode

1.3

µs

Standard mode

4.7

Hold Time (Repeated) START

Condition (Note 10)

tHD:STA

Fast mode

0.6

µs

Standard mode

4.0

LOW Period of SCL Clock

tLOW

Fast mode

1.3

µs

Standard mode

4.7

HIGH Period of SCL Clock

tHIGH

Fast mode

0.6

µs

Standard mode

4.0

Setup Time for a Repeated

START Condition

tSU:STA

Fast mode

0.6

µs

Standard mode

4.7

Data Hold Time (Notes 11, 12)

tHD:DAT

Fast mode

0

0.9

µs

Standard mode

0

Data Setup Time (Note 13)

tSU:DAT

Fast mode

100

ns

Standard mode

250

Rise Time of Both SDA and SCL

Signals (Note 14)

tR

Fast mode

20 + 0.1CB

300

ns

Standard mode

20 + 0.1CB

1000

Fall Time of Both SDA and SCL

Signals (Note 14)

tF

Fast mode

20 + 0.1CB

300

ns

Standard mode

20 + 0.1CB

300

Setup Time for STOP Condition

tSU:STO

Fast mode

0.6

µs

Standard mode

4.0

Capacitive Load for Each Bus

Line (Note 14)

CB

400

pF

I/O Capacitance (SDA, SCL)

CI/O

(Note 9)

10

pF

Oscillator Stop Flag (OSF) Delay

tOSF

(Note 15)

100

ms

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