Datasheet > 8T49N008I

8T49N008I

更新时间： 2024-11-25 14:58:23

品牌	Logo	应用领域
瑞萨 - RENESAS		/
页数	文件大小	规格书
39页	1539K
描述
Programmable FemtoClock? NG LVPECL/LVDS Clock Generator with 8-Outputs

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8T49N008I 数据手册

Programmable FemtoClock^®NG LVPECL/LVDS

Clock Generator with 8-Outputs

IDT8T49N008I

DATASHEET

General Description

Features

The IDT8T49N008I is an eight output Clock Synthesizer with

selectable LVDS or LVPECL outputs. The IDT8T49N008I can

synthesize any one of four frequencies from a single crystal or

reference clock. The four frequencies are selected from the

Frequency Selection Table (Table 3A) and are programmed via I²C

interface. The four predefined frequencies are selected in the user

application by two frequency selection pins. Note the desired

programmed frequencies must be used with the corresponding

crystal or clock frequency as indicated in Table 3A.

• Fourth Generation FemtoClock NG PLL technology

• Eight selectable LVPECL or LVDS outputs

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

levels: LVPECL, LVDS, HCSL

• FemtoClock NG VCO Range: 1.91GHz - 2.5GHz

• RMS phase jitter at 156.25MHz (12kHz - 20MHz):

228fs (typical)

• RMS phase jitter at 156.25MHz (10kHz - 1MHz): 175fs (typical)

• Full 2.5V or 3.3V power supply

Excellent phase noise performance is maintained with IDT’s Fourth

Generation FemtoClock^®NG PLL technology, which delivers

sub-400fs RMS phase jitter.

• 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

30 29 28 27 26 25 24 23 22 21

FSEL1

V^CC

VEE

ADDR_SEL

FSEL0

nCLK

CLK

V^EE

XTAL_OUT

XTAL_IN

V^EE

SCLK

SDATA

V^EE

VCCA

LOCK

V^EE

VCC

CLK_SEL

V^EE

9 10

IDT8T49N008I

40-Lead VFQFN

6mm x 6mm x 0.925mm package body

4.65mm x 4.65mm E-Pad

NL Package

IDT8T49N008ANLGI REVISION A FEBRUARY 13, 2014

12 3 4 5 6 7...39

中文翻译

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