S-35392A Datasheet, PDF (5/47 Pages) Seiko Instruments Inc – 2-WIRE REAL-TIME CLOCK

Rev.1.3_00
2-WIRE REAL-TIME CLOCK
S-35392A
„ Absolute Maximum Ratings
Table 2
Parameter
Symbol
Applicable Pin
Rating
Unit
Power supply voltage
Input voltage
V_DD
−
V_IN
SCL, SDA
V_SS − 0.3 to V_SS + 6.5
V
V_SS − 0.3 to V_SS + 6.5
V
Output voltage
V_OUT
SDA, 32KO, INT2
V_SS − 0.3 to V_SS + 6.5
V
Operating ambient temperature^*1 T_opr
−
−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
V_DD
Ta = −40 to +85°C
1.3
3.0
5.5
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, VT-200 crystal oscillator (C_L = 6 pF, 32.768 kHz) manufactured by Seiko Instruments Inc.)
Parameter
Symbol
Conditions
Min.
Typ.
Max.
Unit
Oscillation start voltage
Oscillation start time
IC-to-IC frequency deviation^*1
V_STA
t_STA
δIC
Within 10 seconds
−
−
1.1
−
5.5
V
−
−
1
s
−10
−
+10
ppm
Frequency voltage deviation
δV
External capacitance
C_g
Internal oscillation capacitance C_d
V_DD = 1.3 to 5.5 V
Applied to XIN pin
Applied to XOUT pin
−3
−
+3
ppm/V
−
−
9.1
pF
−
8
−
pF
*1. Reference value
Seiko Instruments Inc.
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