- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄98067 > S-35192A-I8T1U 1 TIMER(S), REAL TIME CLOCK, PDSO8 PDF資料下載
參數(shù)資料
| 型號(hào)： | S-35192A-I8T1U |
| 元件分類： | 時(shí)鐘/數(shù)據(jù)恢復(fù)及定時(shí)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)： | 27/41頁 |
| 文件大?。?/td> | 366K |
| 代理商： | S-35192A-I8T1U |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁當(dāng)前第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁
3-WIRE REAL-TIME CLOCK
Rev.2.0_00
S-35192A
Seiko Instruments Inc.
33
3.
Adjustment of oscillation frequency
(1)
Adjustment by setting Cg
Matching of the crystal oscillator with the nominal frequency must be performed with the stray capacitance on the
board included. Select a crystal oscillator and optimize the Cg value in accordance with the flowchart below.
START
END
Set to center
of variable
capacitance*3
Select a crystal
oscillator*1
Variable
capacitance
Change Cg
Optimal
value*2
Frequency
Cg in
specification
Set Cg
Make fine adjustment
of frequency using
variable capacitance
YES
NO
YES
NO
YES
Trimmer capacitor
Fixed capacitor
NO
YES
*1. Request a crystal manufacturer for matching evaluation between the IC and a crystal.
The recommended
crystal characteristic values are, CL value (load capacitance) = 6 pF, R1 value (equivalent serial resistance) = 50
k
Ω max.
*2. The Cg value must be selected on the actual PCB since it is affected by stray capacitance. Select the external Cg
value in a range of 0 pF to 9.1 pF.
*3. Adjust the rotation angle of the variable capacitance so that the capacitance value is slightly smaller than the
center, and confirm the oscillation frequency and the center value of the variable capacitance. This is done in
order to make the capacitance of the center value smaller than one half of the actual capacitance value because
a smaller capacitance value increases the frequency variation.
Figure 38
Crystal Oscillator Setting Flow
Caution
1. The oscillation frequency varies depending on the ambient temperature and power supply
voltage. Refer to “
Characteristics (Typical Data)”.
2. The 32.768 kHz crystal oscillator operates more slowly at an operating temperature
than
higher or lower 20 to 25
°C. Therefore, it is recommended to set the oscillator to operate
slightly faster at normal temperature.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| S-3530AECA | REAL TIME CLOCK, UUC8 |
| S-3531AECA-TB-01 | REAL TIME CLOCK, UUC8 |
| S-35380A-T8T1G | REAL TIME CLOCK, PDSO8 |
| S-35380A-J8T1G | REAL TIME CLOCK, PDSO8 |
| S-35390A-I8T1-G | 1 TIMER(S), REAL TIME CLOCK, PDSO8 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| S-35199A01 | 制造商:SII 制造商全稱:Seiko Instruments Inc 功能描述:3-WIRE REAL-TIME CLOCK |
| S-35199A01-HRT1 | 制造商:Seiko Instruments Inc (SII) 功能描述:3WIRE REAL TIME CLCK |
| S3-5-1AE | 制造商:OENINDIA 制造商全稱:OEN India Limited 功能描述:MINI AUTOMOTIVE RELAY |
| S3-5-1ANIL | 制造商:OENINDIA 制造商全稱:OEN India Limited 功能描述:MINI AUTOMOTIVE RELAY |
| S3-5-1CE | 制造商:OENINDIA 制造商全稱:OEN India Limited 功能描述:MINI AUTOMOTIVE RELAY |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。