DS1338 I
2
C RTC with 56-Byte NV RAM
TYPICAL OPERATING CHARACTERISTICS
(V
CC
= 3.3V, T
A
=
+25°C,
unless otherwise noted.)
I
BAT0SC1
vs. V
CC
SQUARE-WAVE OFF
DS1338 toc01
I
BAT0SC2
vs. V
CC
SQUARE-WAVE ON
1400
1350
1300
1250
1200
1150
1100
1050
1000
950
900
850
800
750
700
1.3
V
CC
= 0V
DS1338 toc02
1000
950
SUPPLY CURRENT (nA)
900
850
800
750
700
650
600
1.3
V
CC
= 0V
1.8
2.3
2.8
3.3
3.8
4.3
4.8
SUPPLY CURRENT (nA)
5.3
1.8
2.3
2.8
3.3
3.8
4.3
4.8
5.3
V
BAT
(V)
V
BAT
(V)
I
BAT0SC1
vs. TEMPERATURE
V
BAT
= 3.0V
DS1338 toc03
I
CCA
vs. V
CC
SQUARE-WAVE ON
250
SUPPLY CURRENT (mA)
225
200
175
150
125
100
75
DS1338 toc04
V
CC
= 0V
850
SUPPLY CURRENT (nA)
275
800
750
700
-40
-20
0
20
40
60
80
TEMPERATURE ( C)
50
1.8
2.3
2.8
3.3
3.8
4.3
4.8
5.3
V
CC
(V)
OSCILLATOR FREQUENCY vs. V
BAT
32767.74
32767.73
FREQUENCY (Hz)
32767.72
32767.71
32767.70
32767.69
32767.68
32767.67
32767.66
32767.65
1.3
1.8
2.3
2.8
3.3
V
BAT
(V)
3.8
4.3
4.8
5.3
V
CC
= 0V
DS1338 toc05
32767.75
6 of 15
DALLAS [ DALLAS SEMICONDUCTOR ]
