Datasheet > 8430AY-71

8430AY-71

更新时间： 2024-02-11 14:31:31

品牌	Logo	应用领域
艾迪悌 - IDT		/
页数	文件大小	规格书
16页	210K
描述
Clock Generator, PQFP32

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8430AY-71 技术参数

是否Rohs认证：	不符合	生命周期：	Active
Reach Compliance Code：	not_compliant	风险等级：	5.88
JESD-30 代码：	S-PQFP-G32	JESD-609代码：	e0
湿度敏感等级：	3	端子数量：	32
最高工作温度：	70 °C	最低工作温度：
封装主体材料：	PLASTIC/EPOXY	封装代码：	QFP
封装等效代码：	QFP32,.35SQ,32	封装形状：	SQUARE
封装形式：	FLATPACK	电源：	3.3 V
认证状态：	Not Qualified	子类别：	Clock Generators
标称供电电压：	3.3 V	表面贴装：	YES
温度等级：	COMMERCIAL	端子面层：	Tin/Lead (Sn85Pb15)
端子形式：	GULL WING	端子节距：	0.8 mm
端子位置：	QUAD	Base Number Matches：	1

8430AY-71 数据手册

ICS8430-71

Integrated

Circuit

Systems, Inc.

700MH

Z, LOW

ITTER, CRYSTAL

NTERFACE

LVCMOS-TO-3.3V LVPECL FREQUENCY

SYNTHESIZER

• The traces with 50Ω transmission lines TL1 and TL2

at FOUT and nFOUT should have equal delay and run

adjacent to each other.Avoid sharp angles on the clock

trace. Sharp angle turns cause the characteristic

impedance tochange on the transmission lines.

The following component footprints are used in this layout

example: All the resistors and capacitors are size 0603.

POWER AND GROUNDING

Place the decoupling capacitors C14 and C15 as close as pos-

sible to the power pins. If space allows, placing the decoupling

capacitor at the component side is preferred. This can reduce

unwanted inductance between the decoupling capacitor and the

power pin generated by the via.

• Keep the clock trace on the same layer.Whenever pos-

sible, avoid any vias on the clock traces. Any via on the

trace can affect the trace characteristic impedance and

hence degrade signal quality.

• To prevent cross talk, avoid routing other signal traces in

parallel with the clock traces. If running parallel traces is

unavoidable, allow more space between the clock trace

and the other signal trace.

Maximize the pad size of the power (ground) at the decoupling

capacitor.Maximize the number of vias between power (ground)

and the pads.This can reduce the inductance between the power

(ground) plane and the component power (ground) pins.

• Make sure no other signal trace is routed between the

clock trace pair.

If V_CCAshares the same power supply with V_CC, insert the RC

filter R7, C11, and C16 in between. Place this RC filter as close

to theV_CCAas possible.

The matching termination resistors R1, R2, R3 and R4 should

be located as close to the receiver input pins as possible.

Other termination schemes can also be used but are not

shown in this example.

CLOCK TRACES AND TERMINATION

The component placements, locations and orientations should be

arranged to achieve the best clock signal quality.Poor clock signal

quality can degrade the system performance or cause system fail-

ure. In the synchronous high-speed digital system, the clock signal

is less tolerable to poor signal quality than other signals. Any ring-

ing on the rising or falling edge or excessive ring back can cause

system failure. The trace shape and the trace delay might be re-

stricted by the available space on the board and the component

location.While routing the traces, the clock signal traces should be

routed first and should be locked prior to routing other signal traces.

CRYSTAL

The crystal X1 should be located as close as possible to the

pins 24 (XTAL1) and 25 (XTAL2). The trace length between

the X1 and U1 should be kept to a minimum to avoid unwanted

parasitic inductance and capacitance. Other signal traces should

not be routed near the crystal traces.

GND

VCC

VIA

PIN 1

C16

VCCA

C11

Close to the input

pins of the

receiver

C15

TL1

C14

TL1N

TL1, TL21N are 50 Ohm

traces and equal length

FIGURE 5B. PCB BOARD LAYOUT FOR ICS8430-71

www.icst.com/products/hiperclocks.html

8430AY-71

REV. B JANUARY 27, 2005

1...7 8 91011 12 13...16

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与8430AY-71相关器件

型号	品牌	描述	获取价格	数据表
8430AY-71T	IDT	Clock Generator, PQFP32	获取价格
8430AYI-61	IDT	Clock Generator, 500MHz, PQFP32, 7 X 7 MM, 1.40 MM HEIGHT, MS-026BBA, LQFP-32	获取价格
8430AYI-61LF	IDT	LVPECL Frequeny Synthesizer	获取价格
8430AYI-61LFT	IDT	LVPECL Frequeny Synthesizer	获取价格
8430AYI-61T	IDT	Clock Generator, 500MHz, PQFP32, 7 X 7 MM, 1.40 MM HEIGHT, MS-026BBA, LQFP-32	获取价格
8430AYI-71	IDT	Clock Generator, PQFP32	获取价格

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