5P49EE802NDGI8集成電路（IC）的時鐘發(fā)生器PLL頻率合成器規(guī)格書PDF中文資料

Description

The 5P49EE802 is a programmable clock generator intended

for low power, battery operated consumer applications. There

are four internal PLLs, each individually programmable,

allowing for up to eight different output frequencies. The

frequencies are generated from a single reference clock. The

reference clock can come from either a TCXO or fundamental

mode crystal. An additional 32kHz crystal oscillator is

available to provide a real time clock or non-critical

performance MHz processor clock.

The 5P49EE802 can be programmed through the use of the

I

2C interfaces. The programming interface enables the device

to be programmed when it is in normal operation or what is

commonly known as in system programmable. 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 8-bit reference divider and a

11-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 is

supported on one of the PLLs.

Spread spectrum generation is supported on one of the PLLs.

The device is specifically designed to work with display

applications to ensure that the spread profile remains

consistent for each HSYNC in order to reduce ROW noise. It

also may operate in standard spread spectrum mode.

There are total seven 8-bit output dividers. Outputs are

LVCMOS. The outputs are connected to the PLLs via the

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 can be

programmed.

Features

? Four internal PLLs

? Internal non-volatile EEPROM

? Internal I2C EEPROM master interface

? FAST (400kHz) mode I2C serial interfaces

? Input Frequencies

– TCXO: 10 MHz to 40 MHz

– Crystal: 8 MHz to 30 MHz

– RTC Crystal: 32.768 kHz

? Output Frequency Ranges: kHz to 120 MHz

? Each PLL has an 8-bit reference divider and a 11-bit

feedback-divider

? 8-bit output-divider blocks

? One of the PLLs support Spread Spectrum generation

capable of configuration to pixel rate, with adjustable

modulation rate and amplitude to support video clock with

no visible artifacts

? I/O Standards:

– Outputs - 1.8V/2.5V/3.3 V LVTTL/ LVCMOS

– 3 independent adjustable VDDO groups

? Programmable Slew Rate Control

? Programmable Loop Bandwidth Settings

? Programmable output inversion to reduce bimodal jitter

? Individual output enable/disable

? Power-down/Sleep mode

– 10?A max in power down mode

– 32kHz clock output active sleep mode

– 100?A max in sleep mode

? 1.8V VDD Core Voltage

? Available in 28 pin 4x4mm QFN packages

? -40 to +85°C Industrial Temp operation