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5V49EE901PGGI Folha de dados(PDF) 1 Page - Integrated Device Technology

Nome de Peças 5V49EE901PGGI
Descrição Electrónicos  EEPROM PROGRAMMABLE CLOCK GENERATOR
Download  35 Pages
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Fabricante Electrônico  IDT [Integrated Device Technology]
Página de início  http://www.idt.com
Logo IDT - Integrated Device Technology

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DATASHEET
EEPROM PROGRAMMABLE CLOCK GENERATOR
IDT5V49EE901
IDT® EEPROM PROGRAMMABLE CLOCK GENERATOR
1
IDT5V49EE901
REV J 022310
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. A glitchless 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 I2C 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.
Features
Four internal PLLs
Internal non-volatile EEPROM
Fast (400kHz) mode I2C 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 glitchless auto and manual
switchover options
Individual output enable/disable
Power-down mode
3.3V core V
DD
Available in TSSOP and VFQFPN packages
-40 to +85 C Industrial Temp operation


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