DS17885 datasheet(26/38 Pages) DALLAS

26 / 38 page

DS17885/DS17887

26 of 38

DC ELECTRICAL CHARACTERISTICS

Over the operating range (3V)

PARAMETER

SYMBOL

MIN

TYP

MAX

UNITS

NOTES

Average VCC Power-Supply

Current

ICC1

1, 2

CMOS Standby Current

( CS = VCC - 0.2V)

ICC2

0.5

1, 2

Input Leakage Current

(Any Input)

IIL

-1

Output Leakage Current

IOL

-1

Output Logic 1 Voltage

at -0.4mA

VOH

2.4

Output Logic 0 Voltage

at +0.8mA

VOL

0.4

Power-Fail Trip Point

VPF

2.5

2.6

2.7

Battery Leakage OSC ON

IBAT1

0.50

0.7

Battery Leakage OSC OFF

IBAT2

0.050

0.4

I/O Leakage

ILO

-1

PWR

Output at 0.4V

IOLPWR

4mA

IRQ

Output at 0.4V

IOLIRQ

0.8

CRYSTAL SPECIFICATIONS*

PARAMETER

SYMBOL

MIN

TYP

MAX

UNITS

NOTES

Nominal Frequency

32.768

kHz

Series Resistance

ESR

kΩ

Load Capacitance

6 or 12.5

*The crystal, traces, and crystal input pins should be isolated from RF generating signals. Refer to Application

Note 58, “Crystal Considerations for Dallas Real-Time Clocks” for additional specification.

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