DS1647 Maxim, DS1647 Datasheet - Page 10

• Manufacturer Part Number: DS1647
• Description: The DS1647 is a 512k x 8 nonvolatile static RAM with a full-function real-time clock, which are both accessible in a byte-wide format
• Manufacturer: Maxim

AC ELECTRICAL CHARACTERISTICS—POWER-UP/POWER-DOWN TIMING
(V
POWER-DOWN/POWER-UP TIMING
OUTPUT LOAD
PARAMETER
CE or WE at V
V
V
V
V
Power-Up
Expected Data-Retention Time +25°C
(Oscillator On)
CC
PF (MAX)
PF (MIN)
SO
PF (MIN)
= 5.0V ±10%, T
to V
PF (MIN)
to V
to V
to V
SO
PF (MAX)
PF (MIN)
IH
V
V
before Power-Down
CC
CC
Fall Time
Rise Time
A
V
V
= 0°C to +70°C.)
CC
CC
Rise Time
Fall Time
SYMBOL
t
t
t
t
t
REC
t
t
DR
PD
FB
RB
R
F
10 of 12
MIN
300
10
15
10
0
1
0
TYP
MAX
35
UNITS
years
ms
µs
µs
µs
µs
µs
DS1647/DS1647P
NOTES
4