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DS14285S/TR датащи(PDF) 22 Page - Dallas Semiconductor

номер детали DS14285S/TR
подробное описание детали  Real-Time Clock with NV RAM
PDF  26 Pages
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производитель  DALLAS [Dallas Semiconductor]
домашняя страница  https://www.maximintegrated.com/en.html
Logo DALLAS - Dallas Semiconductor

DS14285S/TR датащи(HTML) 22 Page - Dallas Semiconductor

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DS14285/DS14287
22 of 26
POWER-DOWN/POWER-UP TIMING
POWER-DOWN/POWER-UP TIMING
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS NOTES
CS
at VIH before Power-Down
tPD
0
µs
VCC slew from 4.5V to 0V ( CS at VIH)
tF
300
µs
VCC slew from 0V to 4.5V ( CS at VIH)
tR
100
µs
CS
at VIH after Power-Up
tREC
20
200
ms
Chip-Enable Propagation Delay to
External SRAM
tCED
10
ns
(TA = +25°C)
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS NOTES
Expected Data Retention for DS14287
tDR
10
years
10
NOTE: The RTC keeps 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-backup mode.



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