S-35399A02 Datasheet, PDF (6/55 Pages) Seiko Instruments Inc – 2-WIRE REAL-TIME CLOCK

2-WIRE REAL-TIME CLOCK
S-35399A02
Rev.1.0_00
„ Absolute Maximum Ratings
Table 2
Parameter
Symbol
Applicable Pin
Rating
Unit
Power supply voltage 1
Power supply voltage 2
Input voltage
V_DD
V_DDL
V_IN
−
−
SCL, SDA, CTRL
V_SS − 0.3 to V_SS + 6.5
V
V_SS − 0.3 to V_DD
V
V_SS − 0.3 to V_SS + 6.5
V
Output voltage 1
V_OUT1
SDA, INT1 , INT2 , F32K
V_SS − 0.3 to V_SS + 6.5
V
Output voltage 2
Operating ambient
temperature ^*1
V_OUT2
FOUT
T_opr
−
V_SS − 0.3 to V_DDL
V
−40 to +85
°C
Storage temperature
T_stg
−
−55 to +125
°C
*1. Conditions with no condensation or frost. Condensation and frost cause short circuiting between pins, resulting in a
malfunction.
Caution The absolute maximum ratings are rated values exceeding which the product could suffer physical
damage. These values must therefore not be exceeded under any conditions.
„ Recommended Operation Conditions
Table 3
(V_SS = 0 V)
Parameter
Symbol
Conditions
Min.
Typ.
Max.
Unit
Power supply voltage 1^*1 V_DD
Ta = −40 to +85°C
1.3
3.0
5.5
V
Power supply voltage 2 V_DDL
Ta = −40 to +85°C
1.3
−
V_DD
V
Time keeping power
supply voltage ^*2
V_DDT
Ta = −40 to +85°C
V_DET − 0.15
−
5.5
V
Crystal oscillator C_L value C_L
−
−
6
7
pF
*1. The power supply voltage that allows communication under the conditions shown in Table 8 of “„ AC Electrical
Characteristics”.
*2. The power supply voltage that allows time keeping. For the relationship with V_DET (low power supply voltage detection
voltage), refer to “„ Characteristics (Typical Data)”.
„ Oscillation Characteristics
Table 4
(Ta = 25°C, V_DD = 3.0 V, V_SS = 0 V, SP-T2A crystal oscillator (C_L = 6 pF, 32.768 kHz) manufactured by Seiko Instruments Inc.)
Parameter
Symbol
Conditions
Min.
Typ.
Max.
Unit
Oscillation start voltage V_STA
Oscillation start time
t_STA
IC-to-IC frequency
deviation ^*1
δIC
Within 10 seconds
CTRL pin = “L” or open
−
1.1
−
5.5
V
−
−
1
s
−10
−
+10
ppm
Frequency voltage
deviation
δV
V_DD = 1.3 to 5.5 V
−3
−
+3
ppm/V
External capacitance
C_g
Internal oscillation
capacitance
C_d
Applied to XIN pin
Applied to XOUT pin
−
−
9.1
pF
−
8
−
pF
Duty ratio
Applied when 32.768 kHz is output
Duty
40
−
60
%
from either INT1 , F32K, or FOUT pin
*1. Reference value
6
Seiko Instruments Inc.