DS1500 Y2KC Watchdog RTC with Nonvolatile Control

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ABSOLUTE MAXIMUM RATINGS

Voltage Range on Any Pin Relative to Ground

-0.5V to +6.0V

Operating Temperature Range

-40°C to +85°C (Note 1)

Storage Temperature Range

-55°C to +125°C

Soldering Temperature

See IPC/JEDEC J-STD-020A Specification

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only,

and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is

not implied. Exposure to the absolute maximum rating conditions for extended periods may affect device.

RECOMMENDED DC OPERATING CONDITIONS

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

5V (Y)

4.5

5.0

5.5

Power Supply Voltage (Note 2)

3.3V (W)

3.0

3.3

3.6

V

Y

2.2

0.3

Logic 1 Voltage All Inputs (Note 2)

W

2.0

0.3

V

Pullup Voltage,

IRQ, PWR, and RST Outputs

(Note 2)

5.5

V

Y

-0.3

+0.8

Logic 0 Voltage All Inputs (Note 2)

W

-0.3

+0.6

V

Battery Voltage (Note 2)

2.5

3.0

3.7

V

Y

2.5

3.0

5.3

Auxiliary Battery Voltage (Note 2)

W

2.5

3.0

3.7

V

DC ELECTRICAL CHARACTERISTICS

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Y

15

Active Supply Current (Note 3)

W

10

mA

Y

5

W

4

mA

Y

5

CMOS Standby Current

(CS

W

4

mA

Input Leakage Current (Any Input)

-1

+1

mA

Output Leakage Current (Any Output)

-1

+1

mA

(Note 2)

2.4

V

(Note 2)

0.4

V

DQ0–7,

(Notes 2, 4)

0.4

V

Y

2.0

Battery Low, Flag Trip Point (Note 2)

W

1.9

V

Y

W

0.3

V

Y

4.20

4.50

Power-Fail Voltage (Note 2)

W

2.75

2.97

V

Battery Switchover Voltage

(Notes 2, 6)

V

(Note 7)

0.3

V

Battery Leakage Current

10

100

nA