DS1743/DS1743P Y2K-Compliant, Nonvolatile Timekeeping RAMs

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ABSOLUTE MAXIMUM RATINGS

Voltage Range on Any Pin Relative to Ground……………………………………………………-0.3V to +6.0V

Operating Temperature Range…………………………………………………………………….-40°C to +85°C

Storage Temperature Range……………………………………………………………………….-40°C to +85°C

Soldering Temperature (EDIP) (leads, 10 seconds)…………………….……………………………..…+260°C

Soldering Temperature…………………………………………..….See J-STD-020 Specification (See Note 8)

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 device 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

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

NOTES

2.2

+0.3V

V

1

Logic 1 Voltage All Inputs

±10%

2.0

+0.3V

V

1

-0.3

+0.8

V

1

Logic 0 Voltage All Inputs

±10%

-0.3

+0.6

V

1

DC ELECTRICAL CHARACTERISTICS (5V)

PARAMETER

SYMBOL

MIN

TYP

MAX

UNITS

NOTES

Active Supply Current

15

50

mA

2, 3

TTL Standby Current

(

CE = V

1

3

mA

2, 3

CMOS Standby Current

(

CE

≥ V

1

3

mA

2, 3

Input Leakage Current (Any Input)

-1

+1

μA

Output Leakage Current (Any Output)

-1

+1

μA

Output Logic 1 Voltage

2.4

1

Output Logic 0 Voltage

0.4

1

Write-Protection Voltage

4.20

4.50

V

1

Battery Switchover Voltage

1, 4