DS1643 Maxim, DS1643 Datasheet - Page 11

• Manufacturer Part Number: DS1643
• Description: The DS1643 is an 8K x 8 nonvolatile static RAM with a full function Real Time Clock (RTC) that are both accessible in a byte-wide format
• Manufacturer: Maxim

POWER-UP/DOWN AC CHARACTERISTICS
(V
Power-down
V
V
V
Power-Up Recover Time
Expected Data Retention Time
(Oscillator On)
POWER-UP/POWER-DOWN TIMING
CAPACITANCE
(T
Capacitance on All Pins
Capacitance on All Output Pins
CE
CC
CC
CC
A
CC
or
= +25C)
Fall Time: V
Fall Time: V
Rise Time: V
= 5.0V 10%, T
WE
at V
PARAMETER
PARAMETER
IH
PF(MAX)
PF(MIN)
, CE2 at V
PF(MIN)
to V
to V
to V
A
IL
= 0C to +70C.)
BAT
PF(MIN)
PF(MAX)
, Before
SYMBOL
SYMBOL
t
C
t
t
C
t
REC
t
t
DR
PD
FB
R
F
IN
11 of 17
O
MIN
MIN
300
10
10
0
0
TYP
TYP
MAX
MAX
35
10
7
UNITS
UNITS
years
ms
pF
pF
s
s
s
s
DS1643/DS1643P
NOTES
NOTES
5, 6