DS1248 Maxim, DS1248 Datasheet - Page 13
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DS1248
Manufacturer Part Number
DS1248
Description
The DS1248 1024K NV SRAM with Phantom Clock is a fully static nonvolatile RAM (organized as 128K words by 8 bits) with a built-in real-time clock
Manufacturer
Maxim
Datasheet
1.DS1248.pdf
(19 pages)
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POWER-DOWN/POWER-UP TIMING
Over the Operating Range (3.3V)
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.
MEMORY READ CYCLE (Note 1)
CC
PF(MIN)
CC
PF(MIN)
A
= +25°C)
Slew from V
Slew from V
(CE at V
(CE at V
IH
IH
before Power-Down
after Power-Up
PARAMETER
PARAMETER
IH
IH
PF(MAX)
PF(MAX)
)
)
to
to
SYMBOL
SYMBOL
t
t
t
REC
t
t
DR
PD
F
R
13 of 19
MIN
MIN
300
1.5
10
0
0
TYP
TYP
MAX
MAX
2.5
UNITS
UNITS
years
ms
µs
µs
µs
NOTES
NOTES
9