3-WIRE REAL-TIME CLOCK
S-35190A
Rev.2.4_00
Absolute Maximum Ratings
Table 2
Parameter
Power supply voltage
Input voltage
Symbol
VDD
VIN
Applicable Pin
Rating
SS − 0.3 to VSS + 6.5
SS − 0.3 to VSS + 6.5
Unit
V
V
−
V
V
V
CS, SCK , SIO
SIO, INT
Output voltage
VOUT
Topr
Tstg
SS − 0.3 to VSS + 6.5
−40 to +85
V
Operating ambient
−
°C
°C
temperature *1
Storage temperature
−
−55 to +125
*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
(VSS = 0 V)
Parameter
Symbol
VDD
VDDT
Conditions
Ta = −40 to +85°C
Min.
1.3
Typ.
3.0
Max.
5.5
Unit
V
Power supply voltage*1
Time keeping power
supply voltage *2
Ta = −40 to +85°C
V
DET − 0.15
−
5.5
7
V
Crystal oscillator CL value CL
−
−
6
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 VDET (low power supply voltage detection
voltage), refer to “ Characteristics (Typical Data)”.
Oscillation Characteristics
Table 4
(Ta = 25°C, VDD = 3.0 V, VSS = 0 V, VT-200 crystal oscillator (CL = 6 pF, 32.768 kHz) manufactured by Seiko Instruments Inc.)
Parameter
Symbol
VSTA
tSTA
Conditions
Within 10 seconds
Min.
1.1
−
Typ.
−
−
Max.
5.5
1
Unit
V
s
Oscillation start voltage
Oscillation start time
IC-to-IC frequency
deviation *1
−
δIC
−
−10
−
+10
ppm
Frequency voltage
δV
Cg
Cd
VDD = 1.3 to 5.5 V
−3
−
−
−
8
+3
9.1
−
ppm/V
pF
deviation
External capacitance
Internal oscillation
capacitance
Applied to XIN pin
Applied to XOUT pin
−
pF
*1. Reference value
Seiko Instruments Inc.
5
SII [ SEIKO INSTRUMENTS INC ]
