DS1501 datasheet(2/20 Pages) DALLAS

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DS1501/DS1511 Y2KC Watchdog Real-Time Clocks

2 of 20

ABSOLUTE MAXIMUM RATINGS

Voltage Range on Any Pin Relative to Ground……………………………………………………..……....-0.5V to +6.0V

Operating Temperature Range (Module)…………………………………………………………..………....0°C to +70°C

Operating Temperature Range, DS1501

………………………………………………..-40°C to +85°C (Note 1)

Operating Temperature Range, DS1511……………………………………………………………….……..0°C to +70°C

Storage Temperature Range, DS1501

…………………...…………………………………....-55°C to +125°C

Storage Temperature Range, DS1511………………………………………………………………….…..-40°C to +70°C

Soldering Temperature (DIP, Module)….………………….+260°C Lead Temperature for 10 seconds (max) (Note 2)

Soldering Temperature (SO, TSOP)

…….……………..See IPC/JEDEC J-STD-020A for Surface-Mount Devices

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 reliability.

RECOMMENDED DC OPERATING CONDITIONS

(VCC = 3.3V or 5V ±10%, TA = 0°C to +70°C; VCC = 3.3V or 5V ±10%, TA = -40°C to +85°C.)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

5V (Y)

4.5

5.0

5.5

Power Supply Voltage (Note 3)

VCC

3.3V (W)

3.0

3.3

3.6

2.2

VCC + 0.3

Logic 1 Voltage All Inputs (Note 3)

VIH

2.0

VCC + 0.3

Pullup Voltage,

IRQ, PWR, and

RST Outputs (Note 3)

VPU

5.5

-0.3

+0.8

Logic 0 Voltage All Inputs (Note 3)

VIL

-0.3

+0.6

Battery Voltage (Note 3)

VBAT

2.5

3.0

3.7

2.5

3.0

5.3

Auxiliary Battery Voltage (Note 3)

VBAUX

2.5

3.0

3.7

DC ELECTRICAL CHARACTERISTICS

(VCC = 3.3V or 5V ±10%, TA = 0°C to +70°C; VCC = 3.3V or 5V ±10%, TA = -40°C to +85°C.)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Active Supply Current (Note 4)

ICC

TTL Standby Current (

CE = VIH)

ICC1

CMOS Standby Current

(

CE = VCC - 0.2V)

ICC2

Input Leakage Current (Any Input)

IIL

-1

Output Leakage Current (Any Output)

IOL

-1

Output Logic 1 Voltage

(IOUT = -1.0mA)

VOH

(Note 3)

2.4

VOL1

(Note 3)

0.4

Output Logic 0 Voltage (IOUT = 2.1mA,

DQ0–7; IOUT = 5.0mA, IRQ, IOUT =

7.0mA,

PWR and RST)

VOL2

(Notes 3, 5)

0.4

2.0

Battery Low, Flag Trip Point (Note 2)

VBLF

1.9

4.20

4.50

Power-Fail Voltage (Note 2)

VPF

2.75

2.97

Battery Switchover Voltage (Notes 3, 6)

VSO

VBAT,

VBAUX,

or VPF

Battery Leakage Current

ILKG

100

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