DS17885/DS17887

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DC ELECTRICAL CHARACTERISTICS

Over the operating range (3V)

PARAMETER

SYMBOL

MIN

TYP

MAX

UNITS

NOTES

Current

15

30

mA

1, 2

CMOS Standby Current

0.5

2

mA

1, 2

Input Leakage Current

(Any Input)

-1

+1

mA

Output Leakage Current

-1

+1

mA

5

Output Logic 1 Voltage

at -0.4mA

2.4

V

Output Logic 0 Voltage

at +0.8mA

0.4

V

Power-Fail Trip Point

2.5

2.6

2.7

V

3

Battery Leakage OSC ON

0.50

0.7

mA

11

Battery Leakage OSC OFF

0.050

0.4

mA

11

I/O Leakage

-1

+1

mA

4

PWR

Output at 0.4V

4mA

IRQ

Output at 0.4V

0.8

mA

CRYSTAL SPECIFICATIONS*

PARAMETER

SYMBOL

MIN

TYP

MAX

UNITS

NOTES

Nominal Frequency

32.768

kHz

Series Resistance

ESR

45

kΩ

Load Capacitance

6 or 12.5

pF

*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.