Rainbow-electronics DS1315 Manual do Utilizador descarregar pdf (Página 17)

DS1315

041697 17/22

5V DEVICE POWER–DOWN CONDITION Figure 12

t

CE

t

PF

V

BAT

- 0.2V

4.5V

t

F

CEI

CEO

CEO

V

CCI

ROM/RAM = GND

ROM/RAM

= V

CCO

4.25V

4.0V

V

BAT1,2

t

FB

t

PD

t

CE

3.3V DEVICE POWER–UP POWER–DOWN CHARACTERISTICS,

ROM/RAM

= V

CCO

OR GND (0°C to 70°C)

PARAMETER SYMBOL MIN TYP MAX UNITS NOTES

Recovery Time at

Power–Up

t

REC

V

CC

>3

2 ms 12

V

CC

Slew Rate Power–

Down

t

F

2.9 ≤ V

CC

≤ 3

300 ms 12

V

CC

Slew Rate Power–

UP

t

R

3 ≤ V

CC

≤ 2.9

0 ms 12

CEI High to Power–Fail t

PF

0 ms 12

1 2 ... 12 13 14 15 16 17 18 19 20 21 22

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