DS1340 Maxim, DS1340 Datasheet - Page 5

• Manufacturer Part Number: DS1340
• Description: The DS1340 is a real-time clock (RTC)/calendar that is pin compatible and functionally equivalent to the ST M41T00, including the software clock calibration
• Manufacturer: Maxim

Figure 2. Power-Up/Power-Down Timing
(V
CC
250
200
150
100
850
800
750
700
650
600
550
500
450
400
50
= +3.3V, T
0
1.0
1.0
1.5
1.5
I
BACKUP2
2.0
2.0
I
A
CCSA
= +25°C, unless otherwise noted.)
2.5
2.5
OUTPUTS
(FT = 1) vs. V
INPUTS
V
_______________________________________________________________________________________
vs. V
V
BACKUP
3.0
3.0
V
V
PF(MAX)
PF(MIN)
CC
V
(V)
CC
CC
3.5
3.5
(V)
FT = 0
4.0
4.0
BACKUP
4.5
4.5
RECOGNIZED
VALID
5.0
5.0
5.5
5.5
t
F
150
125
100
850
800
750
700
650
600
550
500
V
75
50
25
PF
0
1.0
-40
I
2
-1.8V
1.5
V
BACKUP
-20
I
BACKUP3
C RTC with Trickle Charger
2.0
I
= 3.0V
CCS
TEMPERATURE (°C)
2.5
0
vs. V
vs. TEMPERATURE
3.0
-3.0V
V
CC
20
CC
(V)
3.5
DON'T CARE
HIGH-Z
Typical Operating Characteristics
FT = 0
40
4.0
4.5
60
-3.3V
5.0
80
5.5
32768.6
32768.5
32768.4
32768.3
32768.2
32768.1
32768.0
V
PF
850
800
750
700
650
600
550
500
450
400
OSCILLATOR FREQUENCY vs. SUPPLY VOLTAGE
1.0
1.0
t
t
R
REC
1.5
1.5
I
BACKUP1
2.0
2.0
RECOGNIZED
VALID
2.5
2.5
(FT = 0) vs. V
V
V
(FT x 64)
BACKUP
BACKUP
3.0
3.0
3.5
3.5
(V)
(V)
4.0
4.0
BACKUP
4.5
4.5
5.0
5.0
5.5
5.5
5