5秒后页面跳转
捷配首页

Datasheet > 微控制器和处理器 > 时钟发生器> DS1090U-2+T
DS1090U-2+T PDF预览

DS1090U-2+T

更新时间： 2024-01-29 12:34:12
品牌 Logo 应用领域
美信 - MAXIM /
页数 文件大小 规格书
8页 999K
描述
Clock Generator, 4MHz, CMOS, PDSO8, USOP-8

阅读下载

获取价格

DS1090U-2+T 技术参数

是否无铅： 不含铅是否Rohs认证： 符合
生命周期：Active零件包装代码：SOIC
包装说明：TSSOP,针数：8
Reach Compliance Code：compliantECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.43
JESD-30 代码：S-PDSO-G8JESD-609代码：e3
长度：3 mm端子数量：8
最高工作温度：85 °C最低工作温度：-40 °C
封装主体材料：PLASTIC/EPOXY封装代码：TSSOP
封装形状：SQUARE封装形式：SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
峰值回流温度（摄氏度）：NOT SPECIFIED认证状态：Not Qualified
座面最大高度：1.1 mm最大供电电压：5.5 V
最小供电电压：3 V表面贴装：YES
技术：CMOS温度等级：INDUSTRIAL
端子面层：MATTE TIN端子形式：GULL WING
端子节距：0.65 mm端子位置：DUAL
处于峰值回流温度下的最长时间：NOT SPECIFIED宽度：3 mm
uPs/uCs/外围集成电路类型：CLOCK GENERATOR, OTHERBase Number Matches：1

DS1090U-2+T 数据手册

 浏览型号DS1090U-2+T的Datasheet PDF文件第2页浏览型号DS1090U-2+T的Datasheet PDF文件第3页浏览型号DS1090U-2+T的Datasheet PDF文件第4页浏览型号DS1090U-2+T的Datasheet PDF文件第5页浏览型号DS1090U-2+T的Datasheet PDF文件第6页浏览型号DS1090U-2+T的Datasheet PDF文件第8页 
Low-Frequency, Spread-Spectrum  
EconOscillator  
MASTER OSCILLATOR FREQUENCY vs.  
EXTERNAL RESISTOR SELECTION  
IF DITHER AMOUNT = 0%  
(+ 1, 2, or 4% of f  
)
MOSC  
DITHER  
AMOUNT  
(2, 4, OR 8%)  
Programmed f  
MOSC  
9
8
7
6
5
4
3
(- 1, 2, or 4% of f  
)
MOSC  
1
MOD  
f
TIME  
Figure 2. Center Frequency Dither Diagram  
Factory-Programmed Prescaler  
The prescaler divides the frequency of the master oscil-  
lator by 1, 2, 4, 8, 16, or 32 to generate the square-  
50  
80  
RESISTANCE (kΩ)  
40  
60  
70  
90  
R
SET  
wave output clock (f  
is an ordering option.  
). This divisor is factory-set and  
OSC  
Figure 1. Master Oscillator Frequency  
Dither Generator  
Detailed Description  
Spread-spectrum functionality is achieved by a user-  
configurable divider (determines dither rate), a triangle  
generator, and a user-configurable dither amplitude cir-  
cuit (see Block Diagram).  
The DS1090 is a center-dithered, spread-spectrum sili-  
con oscillator for use as an external clock in reduced-  
EMI applications. With a combination of factory-  
programmed prescalers and a user-selected external  
resistor, output frequencies from 125kHz to 8MHz can  
be achieved. The output center frequency can be  
dithered by selecting the desired dither rate and ampli-  
tude with discrete inputs J0, J1, JC0, and JC1.  
The input to the triangle-wave generator is derived from  
the internal master oscillator and is fed through a user-  
configurable divider. The settings of control pins JC0  
and JC1 determine this dither rate divisor setting (see  
Table 1), dividing the master clock by 4, 8, 16, or 32.  
The clock signal is further divided by 128 in the  
triangle-wave generator, which results in a triangle-  
wave signal of either 1/512th, 1/1024th, 1/2048th, or  
The DS1090 contains four basic circuit blocks: master  
oscillator, factory-programmed prescaler, dither gener-  
ator, and the voltage-bias circuit that provides the feed-  
back path to the master oscillator for frequency control  
and dithering functions.  
1/4096th of the master oscillator (f  
upon the user’s divisor setting.  
), depending  
MOD  
The dithering frequency can be also expressed as the  
result of  
Master Oscillator  
The master oscillator is programmable in the applica-  
tion by the use of an external resistor (R  
) tied to  
SET  
f
MOSC  
f
=
ground (GND). Resistor values of 45kΩ to 91kΩ vary  
MOD  
Divisor×128  
the square-wave output frequency of the voltage-con-  
trolled master oscillator (f  
4MHz (see Figure 1).  
) from 8MHz down to  
MOSC  
where Divisor is 4, 8, 16, or 32.  
The master oscillator (Hz) frequency can be stated as  
Table 1. Dither Rate Divisor Settings  
3.6461E+11  
Resistor  
DITHERING PERCENTAGE  
DIVISOR  
SETTING  
f
≅
JC1  
JC0  
MOSC  
(f  
MOSC  
/n)  
0
0
1
1
0
1
0
1
F
/ 512  
/ 1024  
/ 2048  
/ 4096  
4
8
MOSC  
F
MOSC  
MOSC  
MOSC  
f
f
16  
32  
_____________________________________________________________________  
7
1...45678

下载PDF

与DS1090U-2+T相关器件

型号 品牌 描述 获取价格 数据表
DS1090U-2+W MAXIM Analog Circuit, PDSO8

获取价格
DS1090U-32 MAXIM Low-Frequency, Spread-Spectrum EconOscillator

获取价格
DS1090U-32/T MAXIM Clock Generator, 0.25MHz, CMOS, PDSO8, MICRO, SOP-8

获取价格
DS1090U-32+ MAXIM 暂无描述

获取价格
DS1090U-32+T MAXIM 暂无描述

获取价格
DS1090U-4 MAXIM Low-Frequency, Spread-Spectrum EconOscillator

获取价格

与DS1090U-2+T相关文章

您还可以找


热门产品
PCB打样/小批量
铝基板
BOM智能配单
PCBA制造
钣金
精密CNC
模具注塑
薄膜开关
精选活动
PCBA打样特惠
四六层板品质升级
铝基板品质升级
一体化电子制造
DFM下载
服务支持
企业认证
产品展示
工厂展示
工艺能力
积分商城
关于捷配
捷配简介
企业文化
公司动态
人才招聘
联系我们
帮助中心
下单流程
付款流程
开票流程
常见问题
全球PCB制造服务专线 400-613-0088

工作时间：9:00-21:00

CEO邮箱：ceo@jiepei.com

投诉邮箱：tousu@jiepei.com

捷配网-微信公众号 微信公众号
捷配网-微信公众号 抖音公众号
资质认证：
合作快递：
支付方式：
Copyright © 2024 Jiepei.com Inc. All Rights Reserved. 版权所有:杭州捷配信息科技有限公司 浙公网安备 33010502006866号 浙ICP备10014259号-119 营业执照ICP证