DS1678 Real-Time Event Recorder

AC ELECTRICAL CHARACTERISTICS

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Input Capacitance

INT

10

pF

Minimum Signal Width

0.122

0.245

ms

Minimum Event Rate

0.854

1.22

ms

AC ELECTRICAL CHARACTERISTICS

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Fast mode

100

400

SCL Clock Frequency

Standard mode

100

kHz

Fast mode

1.3

Bus Free Time Between a STOP and

START Condition

Standard mode

4.7

µs

Fast mode

0.6

Hold Time (Repeated) START

Condition (Note 3)

Standard mode

4.0

µs

Fast mode

1.3

LOW Period of SCL

Standard mode

4.7

µs

Fast mode

0.6

HIGH Period of SCL

Standard mode

4.0

µs

Fast mode

0.6

Setup Time for a Repeated START

Standard mode

4.7

µs

Fast mode

0

0.9

Data Hold Time (Note 4)

Standard mode

0

µs

Fast mode

100

Data Setup Time (Note 5)

Standard mode

250

ns

Fast mode

300

Rise Time of Both SDA and SCL

Signals (Note 6)

Standard mode

1000

ns

Fast mode

300

Fall Time of Both SDA and SCL

Signals (Note 6)

Standard mode

300

ns

Fast mode

0.6

Setup Time for STOP

Standard mode

4.0

µs

Capacitive Load for Each Bus Line

(Note 6)

400

pF

Input Capacitance (SCL, SDA)

5

pF

WARNING: Under no circumstances are negative undershoots of any amplitude allowed

when the device is in write protect.

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