Datasheet > 841S02BGIT

841S02BGIT

更新时间： 2024-02-28 09:58:21

品牌	Logo	应用领域
艾迪悌 - IDT		/
页数	文件大小	规格书
17页	542K
描述
Clock Generator

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841S02BGIT 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-609代码：	e0	湿度敏感等级：	1
端子面层：	Tin/Lead (Sn85Pb15)	Base Number Matches：	1

841S02BGIT 数据手册

ICS841S02I

PCI EXPRESS™ CLOCK GENERATOR

PRELIMINARY

APPLICATION INFORMATION

POWER SUPPLY FILTERING TECHNIQUES

As in any high speed analog circuitry, the power supply pins are

vulnerable to random noise. To achieve optimum jitter

performance, power supply isolation is required.The ICS841S02I

provides separate power supplies to isolate any high switching

noise from the outputs to the internal PLL.V_{DD_SRC}, V_DDAand V_{DD_REF}

should be individually connected to the power supply

plane through vias, and 0.01µF bypass capacitors should be used

for each pin. Figure 1 illustrates this for a generic V_{DD_SRC}pin and

also shows that V_DDArequires that an additional10Ω resistor

along with a 10µF bypass capacitor be connected to the V_DDApin.

3.3V

V_DD

.01μF

10Ω

V_DDA

10μF

FIGURE 1. POWER SUPPLY FILTERING

USING THE ON-BOARD CRYSTAL OSCILLATOR

are typical values for the recommended crystal as show in

Table 7.The specific values may be adjusted to trim the frequency

for the individual board layouts if desired.

The ICS841S02I features a fully integrated Pierce oscillator to

minimize system implementation costs. The recommended

operation of the ICS841S02I is with a 25MHz, 18pF parallel

resonant crystal. See Table 7 for complete crystal specifications.

The crystal and optional trim capacitors should be located as

close to the ICS841S02I XTAL_IN and XTAL_OUT pins as

possible to minimize board level parasitics.

For proper operation, a minimum of 10pF capacitance on each

crystal pin is required. The capacitor values shown in Figure 2

TABLE 7. RECOMMENDED CRYSTAL SPECIFICATIONS

Parameter

Value

Crystal Cut

Fundamental AT Cut

Parallel Resonance

5-7pF

XT AL_IN

Resonance

33pF

TBD

Shunt Capacitance (C_L)

Load Capacitance (C_O)

25MHz

18pF

Equivalent Series Resistance (ESR) 20-50Ω

XTAL_OUT

18pF

TBD

FIGURE 2. CRYSTAL OSCILLATOR WITH TRIM CAPACITOR

ICS841S02BGI REV. C NOVEMBER 1, 2007

IDT^™/ ICS^™PCI EXPRESS CLOCK GENERATOR

1...8 9 101112 13 14...17

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与841S02BGIT相关器件

型号	品牌	获取价格	描述	数据表
841S02CGIT	IDT	获取价格	Processor Specific Clock Generator, 100MHz, CMOS, PDSO20, 6.50 X 4.40 MM, 0.925 MM HEIGHT,
841S02I	RENESAS	获取价格	PCI Express? Clock Generator
841S04BGI	IDT	获取价格	Clock Generator
841S04BGILF	IDT	获取价格	Processor Specific Clock Generator, 100MHz, PDSO24, 4.40 X 7.80 MM, 0.92 MM HEIGHT, ROHS C
841S04BGILFT	IDT	获取价格	Processor Specific Clock Generator, 100MHz, PDSO24, 4.40 X 7.80 MM, 0.92 MM HEIGHT, ROHS C
841S04BGIT	IDT	获取价格	Clock Generator
841S04CGI	IDT	获取价格	Processor Specific Clock Generator, 100MHz, CMOS, PDSO24, 4.40 X 7.80 MM, 0.925 MM HEIGHT,
841S04CGIT	IDT	获取价格	Processor Specific Clock Generator, 100MHz, CMOS, PDSO24, 4.40 X 7.80 MM, 0.925 MM HEIGHT,
841S101I	RENESAS	获取价格	Crystal-to-HCSL 100MHz PCI Express? Clock Synthesizer
841S102I	RENESAS	获取价格	Crystal-to-HCSL 100MHz PCI Express? Clock Synthesizer

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