S-35190A Datasheet, PDF (7/53 Pages) Seiko Instruments Inc – 3-WIRE REAL-TIME CLOCK

Rev.2.4_00
„ AC Electrical Characteristics
Table 7 Measurement Conditions
Input pulse voltage
Input pulse rise/fall time
Output determination voltage
Output load
V_IH = 0.8 × V_DD, V_IL = 0.2 × V_DD
20 ns
V_OH = 0.8 × V_DD, V_OL = 0.2 × V_DD
80 pF + pull-up resistor 10 kΩ
3-WIRE REAL-TIME CLOCK
S-35190A
V_DD
R = 10 kΩ
SIO
C = 80 pF
Remark The power supplies of the IC
and load have the same
electrical potential.
Figure 9 Output Load Circuit
Table 8 AC Electrical Characteristics
Parameter
Symbol
V_DD ^*2 ≥ 1.3 V
Min.
Typ.
Max.
(Ta = −40 to +85°C)
V_DD ^*2 ≥ 3.0 V
Unit
Min.
Typ.
Max.
Clock pulse width
Setup time before CS rise
Hold time after CS rise
Input data setup time
Input data hold time
Output data definition time ^*1
Setup time before CS fall
Hold time after CS fall
Input rise/fall time
t_SCK
5
t_DS
1
t_CSH
1
t_ISU
1
t_IHO
1
t_ACC
−
t_CSS
1
t_DH
1
t_R, t_F
−
−
250000
1
−
−
0.2
−
−
0.2
−
−
0.2
−
−
0.2
−
3.5
−
−
−
0.2
−
−
0.2
−
0.1
−
−
250000 µs
−
−
µs
−
−
µs
−
−
µs
−
−
µs
−
1
µs
−
−
µs
−
−
µs
−
0.05
µs
*1. Since the output format of the SIO pin is Nch open-drain output, output data definition time is determined by the values
of the load resistance (R_L) and load capacity (C_L) outside the IC. Therefore, use this value only as a reference value.
*2. Regarding the power supply voltage, refer to “„ Recommended Operation Conditions”.
Seiko Instruments Inc.
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