Datasheet > MAX3625

MAX3625

更新时间： 2024-09-16 04:41:59

品牌	Logo	应用领域
美信 - MAXIM		时钟发生器
页数	文件大小	规格书
10页	290K
描述
Low-Jitter, Precision Clock Generator with Three Outputs

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MAX3625 数据手册

19-1010; Rev 0; 10/07

Low-Jitter, Precision Clock Generator

with Three Outputs

MAX3625

General Description

Features

The MAX3625 is a low-jitter precision clock generator

optimized for networking applications. The device inte-

grates a crystal oscillator and a phase-locked loop

(PLL) clock multiplier to generate high-frequency clock

outputs for Ethernet, 10G Fibre Channel, and other net-

working applications.

♦ Crystal Oscillator Interface: 24.8MHz to 27MHz

♦ CMOS Input: Up to 320MHz

♦ Output Frequencies

Ethernet: 125MHz, 156.25MHz, 312.5MHz

10G Fibre Channel: 159.375MHz, 318.75MHz

♦ Low Jitter

Maxim’s proprietary PLL design features ultra-low jitter

and excellent power-supply noise rejection, minimizing

design risk for network equipment.

0.14ps

0.38ps

(1.875MHz to 20MHz)

(12kHz to 20MHz)

RMS

♦ Excellent Power-Supply Noise Rejection

♦ No External Loop Filter Capacitor Required

The MAX3625 has three LVPECL outputs. Selectable

output dividers and a selectable feedback divider allow

a range of output frequencies.

Applications

Ordering Information

Ethernet Networking Equipment

PKG

CODE

PART

TEMP RANGE PIN-PACKAGE

Fibre Channel Storage Area Network

MAX3625CUG+ 0°C to +70°C 24 TSSOP

U24-1

+Denotes a lead-free package.

Pin Configuration and Typical Application Circuit appear at

end of data sheet.

Block Diagram

IN_SEL

BYPASS

SELA[1:0]

QA_OE

SELA[1:0]

SELB[1:0]

FB_SEL

RESET LOGIC/POR

RESET

DIVIDER

LVPECL

BUFFER

BYPASS

RESET

LVCMOS

REF_IN

620MHz TO 648MHz

VCO

PFD

FILTER

RESET

27pF

X_IN

QB1

LVPECL

BUFFER

RESET

CRYSTAL

OSCILLATOR

DIVIDER

X_OUT

33pF

QB_OE

QB0

DIVIDERS:

LVPECL

BUFFER

M = 24, 25

NA = 1, 2, 4, 5

NB = 1, 2, 4, 5

QB0

MAX3625

FB_SEL

SELB[1:0]

________________________________________________________________ Maxim Integrated Products

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

12 3 4 5 6 7...10

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