5V49EE901NLGI datasheet, PDF - EEWORLD Datasheet

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5V49EE901NLGI: DescriptionEEPROM PROGRAMMABLE CLOCK GENERATOR; File Size344KB，36 Pages; ManufacturerIDT (Integrated Device Technology, Inc.); Websitehttp://www.idt.com/

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5V49EE901NLGI Overview

EEPROM PROGRAMMABLE CLOCK GENERATOR

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DATASHEET

EEPROM PROGRAMMABLE CLOCK GENERATOR

Description

The IDT5V49EE901 is a programmable clock generator

intended for high performance data-communications,

telecommunications, consumer, and networking

applications. There are four internal PLLs, each individually

programmable, allowing for four unique non-integer-related

frequencies. The frequencies are generated from a single

reference clock. The reference clock can come from one of

the two redundant clock inputs. Automatic or manual

switchover function allows any one of the redundant clocks

to be selected during normal operation.

The IDT5V49EE901 is in-system, programmable and can

be programmed through the use of I

C interface. An

internal EEPROM allows the user to save and restore the

configuration of the device without having to reprogram it on

power-up.

Each of the four PLLs has an 7-bit reference divider and a

12-bit feedback divider. This allows the user to generate

four unique non-integer-related frequencies. The PLL loop

bandwidth is programmable to allow the user to tailor the

PLL response to the application. For instance, the user can

tune the PLL parameters to minimize jitter generation or to

maximize jitter attenuation. Spread spectrum generation

and/or fractional divides are allowed on two of the PLLs.

There are a total of six 8-bit output dividers. Each output

bank can be configured to support LVTTL, LVPECL, LVDS

or HCSL logic levels. Out0 (Output 0) supports 3.3V

single-ended output only. The outputs are connected to the

PLLs via a switch matrix. The switch matrix allows the user

to route the PLL outputs to any output bank. This feature

can be used to simplify and optimize the board layout. In

addition, each output's slew rate and enable/disable

function is programmable.

IDT5V49EE901

Features

•

Four internal PLLs

Internal non-volatile EEPROM

Fast (400kHz) mode I

C serial interface

Input frequency range: 1 MHz to 200 MHz

Output frequency range: 4.9 kHz to 500 MHz

Reference crystal input with programmable linear load

capacitance

– Crystal frequency range: 8 MHz to 50 MHz

•

Each PLL has a 7-bit reference divider and a 12-bit

feedback-divider

•

8-bit output-divider blocks

•

Fractional division capability on one PLL

•

Two of the PLLs support spread spectrum generation

capability

•

I/O Standards:

– Outputs - 3.3 V LVTTL/ LVCMOS

– Outputs - LVPECL, LVDS and HCSL

– Inputs - 3.3 V LVTTL/ LVCMOS

•

Programmable slew rate control

Programmable loop bandwidth

Programmable output inversion to reduce bimodal jitter

Redundant clock inputs with auto and manual switchover

options

Individual output enable/disable

Power-down mode

3.3V core V

Available in TSSOP and VFQFPN packages

-40 to +85 C Industrial Temp operation

IDT®

EEPROM PROGRAMMABLE CLOCK GENERATOR

IDT5V49EE901

REV S 071015

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Description	EEPROM PROGRAMMABLE CLOCK GENERATOR	EEPROM PROGRAMMABLE CLOCK GENERATOR	EEPROM PROGRAMMABLE CLOCK GENERATOR	EEPROM PROGRAMMABLE CLOCK GENERATOR

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