DS14285SN Maxim Integrated Products, DS14285SN Datasheet - Page 22

• Manufacturer Part Number: DS14285SN
• Description: IC RTC W/NV RAM CNTRL IND 24SOIC
• Manufacturer: Maxim Integrated Products
• Type: Clock/Calendar/NVSRAMr

Specifications of DS14285SN

• Memory Size: 114B
• Time Format: HH:MM:SS (12/24 hr)
• Date Format: YY-MM-DD-dd
• Interface: Parallel
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 24-SOIC (7.5mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

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