S-35390A Datasheet, PDF (43/54 Pages) Seiko Instruments Inc – 2-WIRE REAL-TIME CLOCK

Rev.2.4_00
2-WIRE REAL-TIME CLOCK
S-35390A
(7) Oscillation frequency vs. V_DD characteristics
Ta = 25°C, Cg = 7.5 pF
50
40
30
20
10
∆f/f
[ppm] ⁰
–10
–20
–30
–40
–50
01234 56
V_DD [V]
(8) Oscillation frequency vs. Temperature
characteristics
C_g = 7.5 pF
20
0
V_DD = 5.0 V
–20
–40
∆f/f
[ppm]
–60
–80
V_DD = 3.0 V
–100
–120
–140
–40 –25
0 25 50
Ta [°C]
75 85
(9) Oscillation start time vs. C_g characteristics
Ta = 25°C
500
450
400
350
300
t_STA
[ms]
250
200
V_DD = 5.0 V
150
V_DD = 3.0 V
100
50
0
0 2 4 6 8 10
C_g [pF]
(10) Output current characteristics 1 (V_OUT vs. I_OL1)
INT1 ^pin, INT2 ^{pin, Ta = 25°C}
50
40
30
I_OL1
[mA]
20
10
V_DD = 5.0 V
V_DD = 3.0 V
0
0
1
2
3
4
V_OUT [V]
(11) Output current characteristics 2 (V_OUT vs. I_OL2)
SDA pin, Ta = 25°C
50
40
30
I_OL2
[mA]
20
V_DD = 5.0 V
V_DD = 3.0 V
10
(12) BLD detection, release voltage, V_DDT (Min) vs.
Temperature characteristics
C_L = 6 pF
1.4
1.2
Release voltage
1.0
BLD ^0.8
[V] _0.6
0.4
Detection voltage
V_DDT (Min)
0.2
0
0 0.5 1 1.5 2 2.5
0
–40 –25 0
25 50 75 85
V_OUT [V]
Ta [°C]
Seiko Instruments Inc.
43