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參數(shù)資料
| 型號(hào)： | S-35392A-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)： | 31/47頁 |
| 文件大?。?/td> | 419K |
| 代理商： | S-35392A-I8T1U |
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2-WIRE REAL-TIME CLOCK
Rev.2.0_00
S-35392A
Seiko Instruments Inc.
37
Adjustment of Oscillation Frequency
1.
Configuration of oscillator
Since crystal oscillation is sensitive to external noise (the clock accuracy is affected), the following measures are
essential for optimizing the oscillation configuration.
(1)
Place the S-35392A, crystal oscillator, and external capacitor (Cg) as close to each other as possible.
(2)
Increase the insulation resistance between pins and the substrate wiring patterns of XIN and XOUT.
(3)
Do not place any signal or power lines close to the oscillator.
(4)
Locating the GND layer immediately below the oscillator is recommended.
(5)
Locate the bypass capacitor adjacent to the power supply pin of the S-35392A.
S-35392A
XOUT
XIN
Cg
Cd
Rd
Rf
Rf = 100 M
Ω
Rd = 100 k
Ω
Cd = 8 pF
Parasitic capacitance
*3
Crystal oscillator: 32.768 kHz
Parasitic capacitance
*3
CL = 6 pF*1
Cg = None*2 to 9.1 pF
Oscillator internal constant
standard values:
*1. When setting the value for the crystal oscillator’s CL as 7 pF, connect Cd externally if necessary.
*2. Design the board so that the parasitic capacitance is 5 pF.
*3. The oscillator operates unless Cg is not connected. Note that the oscillation frequency is in the direction that it
advances.
Figure 45
Connection Diagram 1
XIN
Crystal oscillator
XOUT
VSS
Cg
8
7
6
5
1
2
3
4
S-35392A
Locate the GND layer in the
layer immediately below
Figure 46
Connection Diagram 2
Caution
1. When using the crystal oscillator with a CL exceeding the rated value (7 pF) (e.g : CL = 12.5 pF),
oscillation operation may become unstable. Use a crystal oscillator with a CL value of 6 pF or 7 pF.
2. Oscillation characteristics is subject to the variation of each component such as substrate parasitic
capacitance, parasitic resistance, crystal oscillator, and Cg. When configuring an oscillator, pay
sufficient attention for them.
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| S-35399A02 | 制造商:SII 制造商全稱:Seiko Instruments Inc 功能描述:2-WIRE REAL-TIME CLOCK |
| S-35399A02-HRT1 | 功能描述:實(shí)時(shí)時(shí)鐘 2WIRE REAL TIME CLCK RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時(shí)間格式:HH:MM:SS RTC 存儲(chǔ)容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
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| S-35399A03-J8T2G | 功能描述:實(shí)時(shí)時(shí)鐘 2-wire 實(shí)時(shí)時(shí)鐘 RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時(shí)間格式:HH:MM:SS RTC 存儲(chǔ)容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| S-35399A03-J8T2U | 功能描述:IC RTC CLK/CALENDAR I2C 8SOP 制造商:ablic u.s.a. inc. 系列:- 包裝:剪切帶（CT） 零件狀態(tài):在售 類型:時(shí)鐘/日歷 特性:警報(bào)器，閏年 存儲(chǔ)容量:- 時(shí)間格式:HH：MM：SS（12/24 小時(shí)） 日期格式:YY-MM-DD-dd 接口:I2C，2 線串口 電壓 - 電源:1.3 V ~ 5.5 V 電壓 - 電源，電池:- 電流 - 計(jì)時(shí)（最大）:14μA ~ 30μA @ 3V ~ 5V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 供應(yīng)商器件封裝:8-SOP-J 標(biāo)準(zhǔn)包裝:1 |
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