DS12C887 Просмотр технического описания (PDF) - Dallas Semiconductor -> Maxim Integrated

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Компоненты Описание

производитель

DS12C887

Real Time Clock

Dallas Semiconductor -> Maxim Integrated 

POWER DOWN / POWER UP TIMING

PARAMETER

CS at VIH before Power-

Down

VCC slew from 4.5V to 0V

( CS at VIH)

VCC slew from 0V to 4.5V

( CS at VIH)

CS at VIH after Power-Up

Expected Data Retention

SYMBOL

tPD

tF

4.0 ≤ VCC ≤ 4.5V

tR

tREC

tDR

MIN

300

100

20

10

TYP

DS12C887

MAX UNITS NOTES

0

µs

µs

µs

200

ms

years 10,11

PARAMETER

Expected Data Retention

SYMBOL

tDR

MIN

10

TYP

MAX

(tA=25°C)

UNITS NOTES

years 10,11

Note:

The real time clock will keep time to an accuracy of ±1 minute per month during data retention time for

the period of tDR.

Warning:

Under no circumstances are negative undershoots, of any amplitude, allowed when device is in battery

back-up mode.

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