Datasheet

V
CC
FALLING vs. RST DELAY
DS1388 toc04
V
CC
FALLING (V/ms)
RESET DELAY (μs)
1010.1
100
1000
10,000
10
0.01 100
V
CC
= V
PF
+ 0.1V TO 0V
I
BACKUP
SUPPLY CURRENT VOLTAGE
vs. TEMPERATURE
DS1388 toc02
TEMPERATURE (°C)
SUPPLY CURRENT (nA)
65
503520
5
10-25
300
350
400
450
500
550
600
250
-40
80
V
BACKUP
= 3V
OSCILLATOR FREQUENCY
vs. SUPPLY VOLTAGE
DS1388 toc03
SUPPLY (V)
FREQUENCY (Hz)
5.34.8
3.8
4.3
2.3
2.8
3.3
1.8
32768.05
32768.10
32768.15
32768.20
32768.25
32768.30
32768.35
32768.40
32768.45
32768.00
1.3
I
BACKUP
SUPPLY CURRENT VOLTAGE
vs. V
BACKUP
DS1388 toc01
V
BACKUP
(V)
SUPPLY CURRENT (nA)
5.3
4.9
4.5
4.1
3.73.32.92.52.11.7
300
350
400
450
500
250
1.3
V
CC
= 0V
Typical Operating Characteristics
(V
CC
= +3.3V, T
A
= +25°C, unless otherwise noted.)
Maxim Integrated 7
I
2
C RTC/Supervisor with Trickle Charger
and 512 Bytes EEPROM
DS1388