DS1225 Dallas, DS1225 Datasheet - Page 7

• Manufacturer Part Number: DS1225
• Description: 64k Nonvolatile SRAM
• Manufacturer: Dallas

POWER-DOWN/POWER-UP CONDITION
SEE NOTE 11
POWER-DOWN/POWER-UP TIMING
WARNING:
Under no circumstance are negative undershoots, of any amplitude, allowed when device is in battery
backup mode.
PARAMETER
V
V
PARAMETER
Expected Data Retention Time
CE
CE at V
CC
CC
at
slew from V
slew from 0
V
IH
IH
before Power-Down
after Power-Up
V
TP
to V
to 0
TP
V
SYMBOL MIN TYP MAX UNITS
SYMBOL MIN TYP MAX UNITS
7 of 10
t
t
t
REC
t
PD
t
DR
F
R
300
300
10
0
2
125
(T
A
years
: See Note 10)
ms
s
s
s
(T
DS1225AB/AD
A
= 25°C)
NOTES
NOTES
11
9