DS1556_10 Datasheet, PDF (12/18 Pages) Maxim Integrated Products – 1M, Nonvolatile, Y2K-Compliant Timekeeping RAM

DS1556 1M, Nonvolatile, Y2K-Compliant Timekeeping RAM
DC ELECTRICAL CHARACTERISTICS
(V_CC = 3.3V 10%, Over the Operating Range.)
PARAMETER
SYMBOL
CONDITIONS
Active Supply Current
TTL Standby Current
(CE = V_IH)
CMOS Standby Current
(CE V_CC - 0.2V)
Input Leakage Current
(Any Input)
Output Leakage Current
(Any Output)
Output Logic 1 Voltage
(I_OUT = -1.0 mA)
Output Logic 0 Voltage
I_CC
I_CC1
I_CC2
I_IL
I_OL
V_OH
V_OL1
V_OL2
(Notes 2, 3, 11)
(Notes 2, 3)
(Notes 2, 3)
(Note 1)
I_OUT = 2.1 mA, DQ0–7
Outputs (Note 1)
I_OUT = 7.0 mA, IRQ/FT
and RST Outputs
(Notes 1, 5)
Write Protection Voltage
V_PF
(Note 1)
Battery Switchover Voltage
V_SO
(Notes 1,4)
MIN
-1
-1
2.4
2.75
TYP
20
2
1
V_BAT
or V_PF
MAX
30
6
4
+1
+1
0.4
0.4
2.97
UNITS
mA
mA
mA
A
A
V
V
V
V
V
Figure 5. Read Cycle Timing Diagram
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