Typical operating characteristics – Rainbow Electronics DS1340 User Manual
Page 5
DS1340
2-Wire RTC with Trickle Charger
_____________________________________________________________________
5
OUTPUTS
V
CC
V
PF(MAX)
INPUTS
HIGH-Z
RST
DON'T CARE
VALID
RECOGNIZED
RECOGNIZED
VALID
V
PF(MIN)
tRST
tRPU
tR
tF
V
PF
V
PF
Figure 2. Power-Up/Power-Down Timing
I
CCSA
vs. V
CC
FT = 0
DS1340 toc01
V
CC
(V)
SUPPLY CURRENT (
µ
A)
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
50
100
150
200
250
0
1.0
5.5
25
50
75
100
125
150
0
I
CCS
vs. V
CC
FT = 0
DS1340 toc02
V
CC
(V)
SUPPLY CURRENT (
µ
A)
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
5.5
-1.8V
-3.0V
-3.3V
I
BACKUP1
(FT = 0) vs. V
BACKUP
DS1340 toc03
450
500
550
600
650
700
750
800
850
400
V
BACKUP
(V)
SUPPLY CURRENT (nA)
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
5.5
Typical Operating Characteristics
(V
CC
= +3.3V, T
A
= +25°C, unless otherwise noted.)
I
BACKUP2
(FT = 1) vs. V
BACKUP
DS1340 toc04
450
500
550
600
650
700
750
800
850
400
V
BACKUP
(V)
SUPPLY CURRENT (nA)
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
5.5
FT vs. V
BACKUP
DS1340 toc06
V
BACKUP
(V)
FREQUENCY (Hz)
5.0
4.5
1.5 2.0 2.5
3.5
3.0
4.0
511.9965
511.9970
511.9975
511.9980
511.9985
511.9990
511.9995
512.0000
511.9960
1.0
5.5
I
BACKUP3
vs. TEMPERATURE
DS1340 toc05
TEMPERATURE (
°C)
SUPPLY CURRENT (nA)
60
40
-20
0
20
500
550
600
650
700
750
800
850
-40
80
V
BACKUP
= 3.0V