Datasheet

DS1553 64kB, Nonvolatile, Year-2000-Compliant Timekeeping RAM
12 of 20
DC ELECTRICAL CHARACTERISTICS
(V
CC
= 3.3V ±10%, T
A
= Over the operating range.)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
Active Supply Current I
CC
10 30 mA 2, 3
TTL Standby Current (CE = V
IH
)
I
CC1
0.7 2 mA 2, 3
CMOS Standby Current
(CE  V
CC
- 0.2V)
I
CC2
0.7 2 mA 2, 3
Input Leakage Current (Any Input) I
IL
-1 +1
A
Output Leakage Current (Any Output) I
OL
-1 +1
A
Output Logic 1 Voltage
(I
OUT
= -1.0mA)
V
OH
2.4 V 1
I
OUT
= 2.1mA,
DQ0–7 Outputs
V
OL1
0.4 V 1
Output Logic 0
Voltage
I
OUT
= 7.0mA, IRQ/FT
and RST Outputs
V
OL2
0.4 V 1, 5
Write Protection Voltage V
PF
2.75 2.97 V 1
Battery Switchover Voltage V
SO
V
BAT
or V
PF
V 1, 4
Figure 5. Read Cycle Timing Diagram