DS1744/DS1744P Y2K-Compliant, Nonvolatile Timekeeping RAMs

8 of 16

ABSOLUTE MAXIMUM RATINGS

Voltage Range on Any Pin Relative to Ground

5.5V Version…………………………..………………………………..…………………………...-0.3V to +6.0V

3.3V Version………………………………………………………………………………………...-0.3V to +4.6V

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 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, Noncondensing

3.3V ±10% or 5V±10%

Industrial

-40°C to +85°C, Noncondesnsing

3.3V ±10% or 5V±10%

RECOMMENDED DC OPERATING CONDITIONS

PARAMETER

SYMBOL

MIN

TYP

MAX

UNITS NOTES

Logic 1 Voltage (All Inputs)

2.2

V

1

2.0

V

1

Logic 0 Voltage (All Inputs)

-0.3

0.8

V

1

-0.3

0.6

V

1

DC ELECTRICAL CHARACTERISTICS

PARAMETER

SYMBOL

MIN

TYP

MAX

UNITS NOTES

Active Supply Current

75

mA

2, 3, 10

TTL Standby Current

6

mA

2, 3

CMOS Standby Current

4

mA

2, 3

Input Leakage Current (Any

Input)

-1

+1

µ

A

Output Leakage Current

(Any Output)

-1

+1

µ

A

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

1, 4