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

DS1090U-2/T

更新时间： 2024-02-08 10:10:02

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, MICRO, SOP-8

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技术参数
数据手册

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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：	compliant	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	5.43
JESD-30 代码：	S-PDSO-G8	JESD-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, OTHER	Base Number Matches：	1

DS1090U-2/T 数据手册

Low-Frequency, Spread-Spectrum

EconOscillator

Resistor Selection

SET

Table 2. Dither Percentage Setting

The value of the resistor used to select the desired fre-

quency is calculated using the formula in the Master

Oscillator section (see also Figure 1). It is recommended

to use, at minimum, a 1%-tolerance, 1/16th-watt compo-

nent with a temperature coefficient that satisfies the over-

all stability requirements desired of the end-equipment.

DITHER PERCENT (%)

Place the external R

resistor as close as possible to

minimize lead inductance.

SET

Dither Percentage Settings

Power-Supply Decoupling

To achieve best results, it is highly recommended that a

decoupling capacitor is used on the IC power-supply

pins. Typical values of decoupling capacitors are 0.01µF

and 0.1µF. Use a high-quality, ceramic, surface-mount

Dither amplitude (measured in percent from the mas-

ter oscillator center frequency) is set using input pins

J0 and J1. This circuit uses a sense current from the

master oscillator bias circuit to adjust the amplitude of

the triangle-wave signal to a voltage level that modu-

lates the master oscillator to a percentage of its resis-

tor-set center frequency. This percentage is set in the

end application to be 0%, 2%, 4%, or 8% (see Table 2).

capacitor, and mount it as close as possible to the V

and GND pins of the IC to minimize lead inductance.

Application Information

Chip Information

TRANSISTOR COUNT: 1883

Pin Connection

The DS1090 is intended to provide a fixed-frequency,

dithered clock to be used as a clock driver for DC-DC

converters and other applications requiring a low-

frequency EMI-reduced clock oscillator. All control pins

must be biased per Tables 1 and 2 for proper operation

SUBSTRATE CONNECTED TO GROUND

Package Information

For the latest package outline information, go to

for the individual application’s requirements. R

must

SET

www.maxim-ic.com/DallasPackInfo.

be tied to ground (GND) by a customer-supplied resistor.

Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are

implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.

8 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600

Printed USA

is a registered trademark of Maxim Integrated Products.

is a registered trademark of Dallas Semiconductor Corporation.

1...5 6 78

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与DS1090U-2/T相关器件

型号	品牌	描述	获取价格	数据表
DS1090U-2/V+T	MAXIM	Analog Circuit, PDSO8,	获取价格
DS1090U-2+	MAXIM	Clock Generator, CMOS, PDSO8, LEAD FREE, USOP-8	获取价格
DS1090U-2+T	MAXIM	Clock Generator, 4MHz, CMOS, PDSO8, USOP-8	获取价格
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

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