DS1251 Maxim, DS1251 Datasheet - Page 13

• Manufacturer Part Number: DS1251
• Description: The DS1251 4096K NV SRAM with Phantom Clock is a fully static nonvolatile RAM (organized as 512K words by 8 bits) with a built-in real-time clock
• Manufacturer: Maxim

POWER-DOWN/POWER-UP TIMING
(T
CE at V
V
V
V
V
CE at V
(T
Expected Data Retention Time
Warning: Under no circumstances are negative undershoots of any amplitude allowed when device
is in battery-backup mode.
CC
PF(MIN)
CC
PF(MIN)
A
A
= Over the operating range.) (3.3V)
Slew from V
Slew from V
= +25°C)
IH
IH
(CE at V
(CE at V
before Power-Down
after Power-Up
P ARAMETER
1 7 B
P ARAMETER
5 B
PF(MAX)
IH
PF(MAX)
IH
)
)
to
to
SYMBOL
SYMBOL
t
t
t
REC
t
t
DR
PD
F
R
13 of 20
MIN
MIN
300
10
1.5
0
0
TYP
TYP
MAX
MAX
2.5
UNITS
UNITS
years
ms
µs
µs
µs
NOTES
NOTES
9