DS14285SN+T&R Maxim Integrated, DS14285SN+T&R Datasheet - Page 22

• Manufacturer Part Number: DS14285SN+T&R
• Description: Real Time Clock
• Manufacturer: Maxim Integrated
• Series: DS14285, DS14287r

Specifications of DS14285SN+T&R

• Rohs: yes
• Function: Clock, Calendar, NV SRAM Control
• Rtc Bus Interface: Multiplexed
• Date Format: DW
• Time Format: HH
• Rtc Memory Size: 114 B
• Supply Voltage - Max: 5.5 V
• Supply Voltage - Min: 4.5 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Package / Case: SOIC-24

POWER-DOWN/POWER-UP TIMING
POWER-DOWN/POWER-UP TIMING
(T
NOTE: The RTC keeps time to an accuracy of +1 minute per month during
data retention time for the period of t
WARNING: Under no circumstances are negative undershoots, of any
amplitude, allowed when device is in battery-backup mode.
V
V
Chip-Enable Propagation Delay to
External SRAM
Expected Data Retention for DS14287
CS
CS
A
CC
CC
= +25°C)
at V
at V
slew from 4.5V to 0V (
slew from 0V to 4.5V (
IH
IH
before Power-Down
after Power-Up
PARAMETER
PARAMETER
CS
CS
at V
at V
IH
IH
)
)
SYMBOL
SYMBOL
t
t
t
t
CED
REC
t
t
DR
PD
F
R
22 of 26
DR
.
MIN
MIN
300
100
20
10
0
TYP
TYP
MAX
MAX
200
10
UNITS
UNITS
years
ms
µs
µs
µs
ns
NOTES
NOTES
10