Datasheet > 8T49N028

8T49N028

更新时间： 2023-12-20 18:46:10

品牌	Logo	应用领域
瑞萨 - RENESAS		/
页数	文件大小	规格书
37页	1763K
描述
Crystal-to-3.3V, 2.5V Multiple Frequency Clock Generator with Fanout Buffer

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数据手册

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8T49N028 数据手册

FemtoClock NG Crystal-to-3.3V, 2.5V

8T49N028

Multiple Frequency Clock Generator

w/Fanout Buffer

DATA SHEET

General Description

Features

The 8T49N028 is a low RMS phase jitter Clock Synthesizer with

selectable internal crystal oscillator or external clock references and

eight outputs, configurable as either LVDS, LVPECL or High

Impedance.

• Fourth Generation FemtoClock NG PLL technology

• Eight selectable LVPECL or LVDS outputs (bank selectable, two

output channels per bank)

• CLK, nCLK input pair can accept the following differential input

levels: LVPECL, LVDS, HCSL

After power up, two frequency select pins determine one of up to four

different sets of factory preprogrammed crystal or input frequency

and output frequency configurations. From a single input reference,

as many as three different output frequencies may be selected for

the output banks: two of these frequencies can be generated by the

internal crystal oscillator, and/or external clock pre-divider, and/or A

output divider, and/or B output divider. The third output frequency is

from the B output divider. Device pre-programming can be

overwritten through the provided I²C interface.

• FemtoClock NG VCO Range: 1.92GHz - 2.5GHz

• Bank A and B output frequencies are mux selectable from internal

crystal oscillator, reference clock input, output divider A or output

divider B

• Clock from OUTPUT DIVIDER A, RMS phase jitter at 156.25MHz

(12KHz - 20MHz): 225fs (typical)

• Clock from OUTPUT DIVIDER B, RMS phase jitter at 156.25MHz

(12KHz - 20MHz): 219fs (typical)

Examples of valid frequency configuration setups illustrate this

device's flexibility, and are shown in Table 3A. The specific internal

an IDT order code. Custom codes can be provided by contacting

IDT.

• Clock from OUTPUT DIVIDER B, RMS phase jitter at 156.25MHz

(10kHz - 1MHz): 165fs (typical) Full 2.5V or 3.3V power supply

• Full 2.5V or 3.3V power supply

• I²C programming interface

• PCI Express (2.5 Gb/S), Gen 2 (5 Gb/s) and Gen 3 (8 Gb/s) jitter

compliant

• -40°C to 85°C ambient operating temperature

• Lead-free (RoHS 6) packaging

Pin Assignment

48 47 46 45 44 43 42 41 40 39 38 37

V_EE

nQ0

nQ4

nQ1

V_{CCO_A}

nQ5

V_{CCO_C}

V_{CCO_D}

8T49N028

V_{CCO_B}

nQ6

nQ2

nQ7

V_EE

nQ3

13 14 15 16 17 18 19 20 21 22 23 24

48-pin, 7mm x 7mm VFQFN Package

8T49N028 REVISION 1 10/16/14

12 3 4 5 6 7...37

中文翻译

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与8T49N028相关器件

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8T49N1012	IDT	获取价格	FemtoClock NG 12-Output Frequency Synthesizer
8T49N1012_18	IDT	获取价格	FemtoClock NG 12-Output Frequency Synthesizer
8T49N1012-000NLGI	IDT	获取价格	FemtoClock NG 12-Output Frequency Synthesizer
8T49N1012-000NLGI8	IDT	获取价格	FemtoClock NG 12-Output Frequency Synthesizer
8T49N1012-001NLGI	IDT	获取价格	FemtoClock NG 12-Output Frequency Synthesizer
8T49N1012-001NLGI8	IDT	获取价格	FemtoClock NG 12-Output Frequency Synthesizer
8T49N1012-002NLGI	IDT	获取价格	FemtoClock NG 12-Output Frequency Synthesizer
8T49N1012-002NLGI8	IDT	获取价格	FemtoClock NG 12-Output Frequency Synthesizer
8T49N1012-006NLGI	IDT	获取价格	FemtoClock NG 12-Output Frequency Synthesizer
8T49N1012-006NLGI8	IDT	获取价格	FemtoClock NG 12-Output Frequency Synthesizer

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