DS1390 Datasheet, PDF (9/24 Pages) Maxim Integrated Products – Low-Voltage SPI/3-Wire RTCs with Trickle Charger

Low-Voltage SPI/3-Wire RTCs with
Trickle Charger
(V_CC = +3.3V, T_A = +25°C, unless otherwise noted.)
I_BACKUP vs. V_BACKUP, BBSQ1 = 0
600
V_CC= 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
V_BACKUP (V)
I_BACKUP vs. TEMPERATURE
V_BACKUP = 3.0V
600
V_CC = 0V
550
500
450
400
350
300
250
-40 -20 0 20 40 60 80
TEMPERATURE (°C)
Typical Operating Characteristics
I_BACKUP vs. V_BACKUP, BBSQ1 = 1
1000
950
V_CC = 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
V_BACKUP (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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