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SK1801WDT: 产品描述Clock Generator, 155.52MHz, CMOS, PDSO16, SOIC-16; 产品类别嵌入式处理器和控制器微控制器和处理器; 文件大小68KB，共4页; 制造商SEMTECH; 官网地址http://www.semtech.com

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SK1801WDT概述

Clock Generator, 155.52MHz, CMOS, PDSO16, SOIC-16

SK1801WDT规格参数

参数名称	属性值
是否无铅	含铅
是否Rohs认证	不符合
厂商名称	SEMTECH
零件包装代码	SOIC
包装说明	SOP,
针数	16
Reach Compliance Code	unknown
ECCN代码	EAR99
JESD-30 代码	R-PDSO-G16
JESD-609代码	e0
长度	10.21 mm
端子数量	16
最高工作温度	85 °C
最低工作温度	-40 °C
最大输出时钟频率	155.52 MHz
封装主体材料	PLASTIC/EPOXY
封装代码	SOP
封装形状	RECTANGULAR
封装形式	SMALL OUTLINE
峰值回流温度（摄氏度）	NOT SPECIFIED
主时钟/晶体标称频率	77.76 MHz
认证状态	Not Qualified
座面最大高度	2.64 mm
最大供电电压	5.5 V
最小供电电压	3 V
标称供电电压	3.3 V
表面贴装	YES
技术	CMOS
温度等级	INDUSTRIAL
端子面层	TIN LEAD
端子形式	GULL WING
端子节距	1.27 mm
端子位置	DUAL
处于峰值回流温度下的最长时间	NOT SPECIFIED
宽度	7.5 mm
uPs/uCs/外围集成电路类型	CLOCK GENERATOR, OTHER

SK1801WDT文档预览

AN1007

Crystal Oscillators

HIGH-PERFORMANCE PRODUCTS

Voltage Controlled and Overtone Crystal Oscillators

Crystal oscillators are used to provide reference fre-

quency clocks for applications such as SONET, Gi-

gabit Ethernet, or fiber channel. Crystal oscillator

manufacturers can design oscillators with accurate

signal waveforms of ±10 ppm or better of the refer-

ence frequency. In this application note only ex-

amples of overtone and voltage controlled crystal

oscillators are provided in figures 1, 2, 3, and 4,

respectively.

Device

Function

These reference clocks can also be obtained with

a PLL based IC devices. Some of the most popular

reference frequencies are 155.52 MHz (OC-3) and

622.08 MHz (OC-12) which can be obtained using

Semtech’s PLL based devices mentioned in Table

Package Type

Operating

Voltage

SK1801W

SONET OC - 3 Frequency Synthesizer

16 Pin Wide

Body SOIC

3.0V to

5.5V

SK1802W

SONET OC - 12 Frequency Synthesizer

16 Pin Wide

Body SOIC

3.0V to

5.5V

Table 1

VCC

0.1

µF

510

Ω

1 Qm

20pF

2 D

Q 7

SK10/100EL16B

3 D*

Q* 6

Ω

0.001µF

4 VBB

VEE 5

510

Ω

510

Ω

VCC

µF

VEE

Figure 1: Overtone Crystal Oscillator

Revision 1/ November 27, 2001

www.semtech.com

AN1007

HIGH-PERFORMANCE PRODUCTS

Ovelrtone Crystal Oscillators

Overtone operation is accomplished by adjusting

the tank circuit frequenct at or near the desired

frequency. Using formula 1, we can calculate the

values of L1 and C1 for a desired frequency.

≅

√

L1C1

VCC

0.1

510

Ω

510

Ω

1 Q

2 Q*

3 D

4 D*

5 VBB

VCC 10

QHG 9

QHG*

VEE 7

EN* 6

510

Ω

VEE

510

Ω

SK10/100EL16WXD

0.1

1 JP1 2

1 JP2 2

10K

Figure 2: Overtone Crystal Oscillator

VCC

Revision 1/ November 27, 2001

www.semtech.com

AN1007

HIGH-PERFORMANCE PRODUCTS

Voltage Controlled Crystal Oscillator

A voltage-variable capacitance tuning diode is placed

in series with the crystal feedback path. Changing

the voltage on V

varies the tuning diode capaci-

tance and tunes the oscillator. The 510 KW resis-

tor, R5, establishes a reference voltage for V

and

the 100 KW resistor, R6, isolates the tuning volt-

age from the feedback loop and a 0.1

capacitor,

C5, provides AC coupling to the tuning diode. The

center frequency is set with a trimmer capacitor,

C1. Deviation on either side of center is a function

of the crystal frequency.

100 KΩ

Varactor

0.1

µF

1 Qm

VCC 8

22µF

VCC

510KΩ

0.1µF

510

Ω

1KΩ

Q 7

SK10/100EL16B

3 D*

Q* 6

4 VBB

VEE 5

510

Ω

510

Ω

0.1µF

Figure 3: Voltage Controlled Crystal Oscillator

Revision 1/ November 27, 2001

www.semtech.com

AN1007

HIGH-PERFORMANCE PRODUCTS

Voltage Controlled Crystal Oscillator

(con’d)

510 K

Ω

100 KΩ C6

Varactor

0.1µF

510

Ω

510

Ω

1 Q

2 Q*

3 D

1 KΩ

4 D*

5 VBB

0.1µF

VCC 10

QHG 9

QHG*

VEE 7

EN* 6

510

Ω

510

Ω

0.1

µF

22µF

VCC

SK10/100EL16WXD

1 JP1 2

1 JP2 2

10 KΩ

VCC

Figure 4: Voltage Controlled Crystal Oscillator

Contact Information

Division Headquarters

10021 Willow Creek Road

San Diego, CA 92131

Phone: (858) 695-1808

FAX:

(858) 695-2633

Semtech Corporation

High-Performance Products Division

Marketing Group

1111 Comstock Street

Santa Clara, CA 95054

Phone: (408) 566-8776

FAX: (408) 727-8994

Revision 1/ November 27, 2001

www.semtech.com

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SK1801WDT相似产品对比

	SK1801WDT	SK1801WD	SK100EL16BDT
描述	Clock Generator, 155.52MHz, CMOS, PDSO16, SOIC-16	Clock Generator, 155.52MHz, CMOS, PDSO16, SOIC-16	Line Receiver, 1 Func, 1 Rcvr, ECL100K, PDSO8, 0.150 INCH, SOIC-8
是否Rohs认证	不符合	不符合	符合
厂商名称	SEMTECH	SEMTECH	SEMTECH
零件包装代码	SOIC	SOIC	SOIC
包装说明	SOP,	SOP,	SOP, SOP8,.25
针数	16	16	8
Reach Compliance Code	unknown	unknown	unknown
ECCN代码	EAR99	EAR99	EAR99
JESD-30 代码	R-PDSO-G16	R-PDSO-G16	R-PDSO-G8
长度	10.21 mm	10.21 mm	4.9 mm
端子数量	16	16	8
最高工作温度	85 °C	85 °C	85 °C
最低工作温度	-40 °C	-40 °C	-40 °C
封装主体材料	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY
封装代码	SOP	SOP	SOP
封装形状	RECTANGULAR	RECTANGULAR	RECTANGULAR
封装形式	SMALL OUTLINE	SMALL OUTLINE	SMALL OUTLINE
峰值回流温度（摄氏度）	NOT SPECIFIED	NOT SPECIFIED	NOT SPECIFIED
认证状态	Not Qualified	Not Qualified	Not Qualified
座面最大高度	2.64 mm	2.64 mm	1.75 mm
最大供电电压	5.5 V	5.5 V	5.5 V
最小供电电压	3 V	3 V	3 V
表面贴装	YES	YES	YES
技术	CMOS	CMOS	ECL100K
温度等级	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL
端子形式	GULL WING	GULL WING	GULL WING
端子节距	1.27 mm	1.27 mm	1.27 mm
端子位置	DUAL	DUAL	DUAL
处于峰值回流温度下的最长时间	NOT SPECIFIED	NOT SPECIFIED	NOT SPECIFIED
宽度	7.5 mm	7.5 mm	3.9 mm
是否无铅	含铅	含铅	-
JESD-609代码	e0	e0	-
最大输出时钟频率	155.52 MHz	155.52 MHz	-
主时钟/晶体标称频率	77.76 MHz	77.76 MHz	-
标称供电电压	3.3 V	3.3 V	-
端子面层	TIN LEAD	TIN LEAD	-
uPs/uCs/外围集成电路类型	CLOCK GENERATOR, OTHER	CLOCK GENERATOR, OTHER	-

SK1801WDT

SK1801WDT概述

SK1801WDT规格参数

SK1801WDT文档预览

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