DS1744/DS1744P 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…………………………………………….See IPC/JEDEC J-STD-020A (DIP Package) (Note 7)

This is a stress rating only and functional operation of the device at these or any other condition beyond those indicated in the

operation sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods of

time can 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

PARAMETER

SYMBOL

MIN

TYP

MAX

UNITS NOTES

2.2

V

1

Logic 1 Voltage (All Inputs)

±10%

±10%

2.0

V

-0.3

0.8

V

Logic 0 Voltage (All Inputs)

±10%

±10%

0.3

0.6

V

1

DC ELECTRICAL CHARACTERISTICS

PARAMETER

SYMBOL

MIN

TYP

MAX

UNITS

NOTES

Active Supply Current

75

mA

2, 3

TTL Standby Current

6

mA

2, 3

CMOS Standby Current

( CE

4

mA

2, 3

Input Leakage Current (Any

Input)

-1

+1

mA

Output Leakage Current

(Any Output)

-1

+1

mA

Output Logic 1 Voltage

2.4

1

Output Logic 0 Voltage

0.4

1

Write Protection Voltage

4.25

4.50

V

1

Battery Switchover Voltage

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