參數(shù)資料
型號: S-35392A-I8T1U
元件分類: 時鐘/數(shù)據(jù)恢復及定時提取
英文描述: 1 TIMER(S), REAL TIME CLOCK, PDSO8
封裝: HALOGEN FREE AND LEAD FREE, SNT-8
文件頁數(shù): 32/47頁
文件大?。?/td> 419K
代理商: S-35392A-I8T1U
2-WIRE REAL-TIME CLOCK
S-35392A
Rev.2.0_00
Seiko Instruments Inc.
38
2.
Measurement of oscillation frequency
When the S-35392A is turned on, a signal of 32.768 kHz is output from the 32KO pin. Turn the power on and measure
the signal with a frequency counter following the circuit configuration shown in Figure 47.
Remark
If the error range is
±1 ppm in relation to 32.768 kHz, the time is shifted by approximately 2.6 seconds per
month (calculated using the following expression).
10
–6 (1 ppm) × 60 seconds × 60 minutes × 24 hours × 30 days = 2.592 seconds
32KO
INT2
SDA
SCL
S-35392A
VDD
XOUT
XIN
VSS
Cg
1 k
Ω
10 k
Ω
1 k
Ω
Frequency
counter
Open
or pull-up
Figure 47
Configuration of Oscillation Frequency Measurement Circuit
Caution
1.
Use a high-accuracy frequency counter of 7 digits or more.
2.
Measure the oscillation frequency under the usage conditions.
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