DS1284QN Maxim Integrated Products, DS1284QN Datasheet - Page 13

• Manufacturer Part Number: DS1284QN
• Description: IC TIMEKEEPER WATCHDG IND 28PLCC
• Manufacturer: Maxim Integrated Products
• Type: Watchdog Timerr

Specifications of DS1284QN

• Memory Size: 50B
• Time Format: HH:MM:SS:hh (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: 28-LCC, 28-PLCC
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

POWER-UP/POWER-DOWN CONDITION
POWER-DOWN/POWER-UP CONDITION
(T
WARNING: Under no circumstances are negative undershoots, of any amplitude, allowed
when device is in battery-backup mode.
CE at V
V
V
CE at V
Expected Data-Retention Time
(DS1286)
A
CC
CC
= +25°C)
Slew from 4.5V to 0V (CE at V
Slew from 0V to 4.5V (CE at V
IH
IH
before Power-Down
after Power-Up
PARAMETER
PARAMETER
IH
IH
)
)
SYMBOL
SYMBOL
t
t
t
REC
t
PD
t
DR
R
F
13 of 18
MIN
MIN
350
100
10
0
TYP
TYP
MAX
MAX
150
UNITS
UNITS
years
s
s
s
ns
DS1284/DS1286
NOTES
NOTES
9