DS1087L datasheet(4/12 Pages) DALLAS

4 / 12 page

3.3V Spread-Spectrum EconOscillator

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AC ELECTRICAL CHARACTERISTICS—2-WIRE INTERFACE

(VCC = 2.7V to 3.6V, TA = 0°C to +70°C.)

PARAMETER

SYMBOL

CONDITION

MIN

TYP

MAX

UNITS

Fast mode (Note 8)

400

SCL Clock Frequency

fSCL

Standard mode (Note 8)

100

kHz

Fast mode (Note 8)

1.3

Bus Free Time Between a STOP

and START Condition

tBUF

Standard mode (Note 8)

4.7

µs

Fast mode (Notes 8 and 9)

0.6

Hold Time (repeated) START

Condition

tHD:STA

Standard mode (Notes 8 and 9)

4.0

µs

Fast mode (Note 8)

1.3

LOW Period of SCL

tLOW

Standard mode (Note 8)

4.7

µs

Fast mode (Note 8)

0.6

HIGH Period of SCL

tHIGH

Standard mode (Note 8)

4.0

µs

Fast mode

0.6

Setup Time for a Repeated

START

tSU:STA

Standard mode

4.7

µs

Fast mode (Notes 8, 10, and 11)

0.9

Data Hold Time

tHD:DAT

Standard mode (Notes 8, 10, and 11)

0.9

µs

Fast mode (Note 8)

100

Data Setup Time

tSU:DAT

Standard mode (Note 8)

250

Fast mode (Note 12)

20 + 0.1CB

300

Rise Time of Both SDA and SCL

Signals

Standard mode (Note 12)

20 + 0.1CB

1000

Fast mode (Note 12)

20 + 0.1CB

300

Fall Time of Both SDA and SCL

Signals

Standard mode (Note 12)

20 + 0.1CB

1000

Fast mode

0.6

Setup Time for STOP

tSU:STO

Standard mode

4.0

µs

Capacitive Load for Each Bus

(Note 12)

400

NV Write Cycle Time

tWR

Input Capacitance

5pF

NONVOLATILE MEMORY CHARACTERISTICS

(VCC = 2.7V to 3.6V)

PARAMETER

SYMBOL

CONDITION

MIN

TYP

MAX

UNITS

Writes

+70°C

10,000

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