Rainbow-electronics DS17487 Manual do Utilizador descarregar pdf (Página 26)

DS17485/DS17487

26 of 38

DC ELECTRICAL CHARACTERISTICS Over the operating range (3V)

PARAMETER SYMBOL MIN TYP MAX UNITS NOTES

Average V

Power-Supply

Current

CC1

15 30 mA 1, 2

CMOS Standby Current

(

CS = V

- 0.2V)

CC2

0.5 2 mA 1, 2

Input Leakage Current

(Any Input)

-1 +1

Output Leakage Current I

-1 +1

Output Logic 1 Voltage

at -0.4mA

2.4 V

Output Logic 0 Voltage

at +0.8mA

0.4 V

Power-Fail Trip Point V

2.5 2.6 2.7 V 3

Battery Leakage OSC ON I

BAT1

0.50 0.7

Battery Leakage OSC OFF I

BAT2

0.050 0.4

I/O Leakage I

-1 +1

PWR Output at 0.4V

OLPWR

4 mA

IRQ Output at 0.4V

OLIRQ

0.8 mA

CRYSTAL SPECIFICATIONS*

PARAMETER SYMBOL MIN TYP MAX UNITS NOTES

Nominal Frequency F

32.768 kHz

Series Resistance ESR 45 kΩ

Load Capacitance C

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.

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