DS1391(2004) Просмотр технического описания (PDF) - Maxim Integrated

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DS1391
(Rev.:2004)

Low-Voltage SPI/3-Wire RTCs with Trickle Charger

Maxim Integrated 

Low-Voltage SPI/3-Wire RTCs with

Trickle Charger

(VCC = +3.3V, TA = +25°C, unless otherwise noted.)

IBACKUP vs. VBACKUP, BBSQ1 = 0

600

VCC= 0

550

500

450

400

350

300

1.3 1.7 2.1 2.5 2.9 3.3 3.7 4.1 4.5 4.9 5.3

VBACKUP (V)

IBACKUP vs. TEMPERATURE

VBACKUP = 3.0V

600

VCC = 0V

550

500

450

400

350

300

250

-40 -20 0 20 40 60 80

TEMPERATURE (°C)

Typical Operating Characteristics

IBACKUP vs. VBACKUP, BBSQ1 = 1

1000

950

VCC = 0V

900

850

800

750

700

650

600

550

500

450

400

350

300

1.3 1.7 2.1 2.5 2.9 3.3 3.7 4.1 4.5 4.9 5.3

VBACKUP (V)

32768.00

OSCILLATOR FREQUENCY

vs. SUPPLY VOLTAGE

32767.95

32767.90

32767.85

32767.80

1.3 1.8 2.3 2.8 3.3 3.8 4.3 4.8 5.3

SUPPLY (V)

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