DS1556 1M, Nonvolatile, Y2K-Compliant Timekeeping RAM

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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

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

2.2

0.3V

V

Logic 1 Voltage All Inputs

(Note 1)

2.0

0.3V

V

-0.3

+0.8

Logic 0 Voltage All Inputs

(Note 1)

-0.3

+0.6

DC ELECTRICAL CHARACTERISTICS

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Active Supply Current

(Notes 2, 3, 11)

30

85

mA

TTL Standby Current

(

CE = V

(Notes 2, 3)

4

6

mA

CMOS Standby Current

(

CE

V

(Notes 2, 3)

2

6

mA

Input Leakage Current

(Any Input)

-1

+1

A

Output Leakage Current

(Any Output)

-1

+1

A

Output Logic 1 Voltage

(Note 1)

2.4

V

Outputs (Note 1)

0.4

V

Output Logic 0 Voltage

and

RST Outputs

(Notes 1, 5)

0.4

V

Write Protection Voltage

(Note 1)

4.20

4.50

V

Battery Switchover Voltage

(Notes 1,4)

V