DS1553 64kB, Nonvolatile, Year-2000-Compliant Timekeeping RAM
DC ELECTRICAL CHARACTERISTICS
(V
CC
= 3.3V ±10%, over the operating range.)
PARAMETER
SYMBOL
Active Supply Current
TTL Standby Current (
CE
= V
IH
)
CMOS Standby Current
(
CE
³
V
CC
- 0.2V)
Input Leakage Current (Any Input)
Output Leakage Current (Any Output)
Output Logic 1 Voltage
(I
OUT
= -1.0mA)
Output Logic 0 Voltage
(I
OUT
= 2.1mA, DQ0–7 Outputs)
(I
OUT
= 7.0mA,
IRQ
/FT and
RST
Outputs)
Write Protection Voltage
Battery Switchover Voltage
I
CC
I
CC1
I
CC2
I
IL
I
OL
V
OH
V
OL1
V
OL2
V
PF
V
SO
2.75
V
BAT
or V
PF
-1
-1
2.4
0.4
0.4
2.97
MIN
TYP
10
0.7
0.7
MAX
30
2
2
+1
+1
UNITS
mA
mA
mA
mA
mA
V
V
V
V
V
1
1
1, 5
1
1, 4
NOTES
2, 3
2, 3
2, 3
Figure 5. Read Cycle Timing Diagram
10 of 19
DALLAS [ DALLAS SEMICONDUCTOR ]
