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MAX3625

Maxim Integrated Products
Part Number MAX3625
Manufacturer Maxim Integrated Products
Description Precision Clock Generator
Published May 26, 2009
Detailed Description 19-1010; Rev 0; 10/07 Low-Jitter, Precision Clock Generator with Three Outputs www.datasheet4u.com General Description...
Datasheet PDF File MAX3625 PDF File

MAX3625
MAX3625

Overview
19-1010; Rev 0; 10/07 Low-Jitter, Precision Clock Generator with Three Outputs www.
datasheet4u.
com General Description ♦ CMOS Input: Up to 320MHz Features ♦ Crystal Oscillator Interface: 24.
8MHz to 27MHz ♦ Output Frequencies Ethernet: 125MHz, 156.
25MHz, 312.
5MHz 10G Fibre Channel: 159.
375MHz, 318.
75MHz ♦ Low Jitter 0.
14psRMS (1.
875MHz to 20MHz) 0.
38psRMS (12kHz to 20MHz) ♦ Excellent Power-Supply Noise Rejection ♦ No External Loop Filter Capacitor Required MAX3625 The MAX3625 is a low-jitter precision clock generator optimized for networking applications.
The device integrates a crystal oscillator and a phase-locked loop (PLL) clock multiplier to generate high-frequency clock outputs for Ethernet, 10G Fibre Channel, and other networking applications.
Maxim’s proprietary PLL design features ultra-low jitter and excellent power-supply noise rejection, minimizing design risk for network equipment.
The MAX3625 has three LVPECL outputs.
Selectable output dividers and a selectable feedback divider allow a range of output frequencies.
Applications Ethernet Networking Equipment Fibre Channel Storage Area Network PART MAX3625CUG+ Ordering Information TEMP RANGE PIN-PACKAGE 0°C to +70°C 24 TSSOP PKG CODE U24-1 Pin Configuration and Typical Application Circuit appear at end of data sheet.
+Denotes a lead-free package.
Block Diagram IN_SEL MR BYPASS SELA[1:0] SELA[1:0] SELB[1:0] FB_SEL BYPASS QA_OE RESET LOGIC/POR RESET DIVIDER NA LVPECL BUFFER QA QA RESET LVCMOS REF_IN 27pF X_IN CRYSTAL OSCILLATOR X_OUT 33pF DIVIDERS: M = 24, 25 NA = 1, 2, 4, 5 NB = 1, 2, 4, 5 LVPECL BUFFER QB0 QB0 DIVIDER M DIVIDER NB 1 0 PFD FILTER RESET 620MHz TO 648MHz VCO 1 RESET LVPECL BUFFER QB1 QB1 QB_OE 0 MAX3625 FB_SEL SELB[1:0] ________________________________________________________________ Maxim Integrated Products 1 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.
Low-Jitter, Precision ...


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