Datasheet

DS1556 1M, Nonvolatile, Y2K-Compliant Timekeeping RAM
11 of 18
ABSOLUTE MAXIMUM RATINGS
Voltage Range on Any Pin Relative to Ground……………………..……………………………………………..-0.3V to +6.0V
Storage Temperature Range
EDIP........................………………………………………………………………...................................-40°C to +85°C
PowerCap..............………………………………………………….…………………………………..-55°C to +125°C
Lead Temperature (soldering, 10s).………..........................................................................................................................+260°C
Note: EDIP is hand or wave-soldered only.
Soldering Temperature (reflow, PowerCap)………………………………….....................................................................+260°C
This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operation
sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect
reliability.
OPERATING RANGE
RANGE TEMP RANGE V
CC
Commercial 0°C to +70°C
3.3V 10% or 5V 10%
Industrial -40°C to +85°C
3.3V 10% or 5V 10%
RECOMMENDED DC OPERATING CONDITIONS
(Over the Operating Range)
PARAMETER SYMBOL
CONDITIONS
MIN TYP MAX UNITS
V
IH
V
CC
= 5V 10%
2.2
V
CC
+
0.3V
V
Logic 1 Voltage All Inputs
(Note 1)
V
IH
V
CC
= 3.3V 10%
2.0
V
CC
+
0.3V
V
V
IL
V
CC
= 5V 10%
-0.3 +0.8
Logic 0 Voltage All Inputs
(Note 1)
V
IL
V
CC
= 3.3V 10%
-0.3 +0.6
DC ELECTRICAL CHARACTERISTICS
(V
CC
= 5.0V 10%, Over the Operating Range.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Active Supply Current I
CC
(Notes 2, 3, 11) 30 85 mA
TTL Standby Current
(CE = V
IH
)
I
CC1
(Notes 2, 3) 4 6 mA
CMOS Standby Current
(CE V
CC
- 0.2V)
I
CC2
(Notes 2, 3) 2 6 mA
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
= -1.0 mA)
V
OH
(Note 1) 2.4 V
V
OL1
I
OUT
= 2.1 mA, DQ0–7
Outputs (Note 1)
0.4 V
Output Logic 0 Voltage
V
OL2
I
OUT
= 7.0 mA, IRQ/FT,
and RST Outputs
(Notes 1, 5)
0.4 V
Write Protection Voltage V
PF
(Note 1) 4.20 4.50 V
Battery Switchover Voltage V
SO
(Notes 1,4) V
BAT
V