Rainbow-electronics DS1682 Manual do Utilizador descarregar pdf (Página 12)

DS1682

12 of 15

AC ELECTRICAL CHARACTERISTICS (-40°C to +85°C; V

CC

= 2.5V to 5.5V)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS NOTES

EEPROM Endurance E

E

50k writes 2

EEPROM Write Time t

EW

150 300 ms 1,3,4

EEPROM Transfer to

RAM

t

ER

1 ms 4,5

ALARM Output

Active-Low Pulse

Width

t

SL

62.5 ms 4

ALARM Output

Active-High Pulse

Width

t

SH

437.5 ms 4

ALARM Input Pulled

Low and Released

Pulse Width

t

SPL

500 ms 4

Fast Mode 400

SCL Clock Frequency f

SCL

Standard Mode 100

kHz

Fast Mode 1.3

Bus Free Time

Between a STOP and

START Condition

t

BUF

Standard Mode 4.7

µs

Fast Mode 0.6

Hold Time (Repeated)

START Condition

t

HD:STA

Standard Mode 4.0

µs

6

Fast Mode 1.3

LOW Period of SCL t

LOW

Standard Mode 4.7

µs

Fast Mode 0.6

HIGH Period of SCL t

HIGH

Standard Mode 4.0

µs

Fast Mode 0.6

Setup Time for a

Repeated START

t

SU:STA

Standard Mode 4.7

µs

Fast Mode 0

Data Hold Time t

HD:DAT

Standard Mode 0

µs

7, 8

Fast Mode 100

Data Setup Time t

SU:DAT

Standard Mode 250

ns 10

Fast Mode

20 + 0.1C

B

300

Rise Time of SDA and

SCL Signals

t

R

Standard Mode

20 + 0.1C

B

1000

ns 9

Fast Mode

20 + 0.1C

B

300

Fall Time of SDA and

SCL Signals

t

F

Standard Mode

20 + 0.1C

B

300

ns 9

Fast Mode 0.6

Setup Time for STOP t

SU:STO

Standard Mode 4.0

µs

Input Capacitance C

I/O

10 pF 4

Capacitive Load for

Each Bus Line

C

B

400 pF 9

1 2 ... 7 8 9 10 11 12 13 14 15

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