DS1556 Maxim, DS1556 Datasheet - Page 12

• Manufacturer Part Number: DS1556
• Description: The DS1556 is a full-function, year-2000-compliant (Y2KC), real-time clock/calendar (RTC) with an RTC alarm, watchdog timer, power-on reset, battery monitor, and 128k x 8 nonvolatile static RAM
• Manufacturer: Maxim

DC ELECTRICAL CHARACTERISTICS
(V
Figure 5. Read Cycle Timing Diagram
Active Supply Current
TTL Standby Current
(CE = V
CMOS Standby Current
(CE V
Input Leakage Current
(Any Input)
Output Leakage Current
(Any Output)
Output Logic 1 Voltage
(I
Output Logic 0 Voltage
Write Protection Voltage
Battery Switchover Voltage
CC
OUT
= 3.3V 10%, Over the Operating Range.)
= -1.0 mA)
PARAMETER
CC
IH
)
- 0.2V)
SYMBOL
V
V
V
I
I
V
V
I
I
I
CC1
CC2
CC
OL
OL1
OL2
IL
OH
SO
PF
(Notes 2, 3, 11)
(Notes 2, 3)
(Notes 2, 3)
(Note 1)
I
Outputs (Note 1)
I
and RST Outputs
(Notes 1, 5)
(Note 1)
(Notes 1,4)
OUT
OUT
CONDITIONS
= 2.1 mA, DQ0–7
= 7.0 mA, IRQ/FT
12 of 18
DS1556 1M, Nonvolatile, Y2K-Compliant Timekeeping RAM
MIN
2.75
2.4
-1
-1
or V
TYP
V
20
BAT
2
1
PF
MAX
2.97
0.4
0.4
+1
+1
30
6
4
UNITS
mA
mA
mA
A
A
V
V
V
V
V