描述 Description

NOT RECOMMENDED FOR NEW DESIGNSThe SY89429A is fully differential frequency synthesizer jitter attenuating that require both serial and parallel interfaces. Its internal VCO will operate over a range of frequencies from 400 to 800MHz. The differential PECL output can be configured to be the VCO frequency divided by 2, 4, 8 or 16. With the output configured to divide the VCO frequency by 2, and with a 16MHz external quartz crystal used to provide the reference frequency, the output frequency can be specified in 1MHz steps.

特性 Features

·Improved jitter performance over SY89429
·25 to 400MHz differential PECL outputs
·±25ps peak-to-peak output jitter
·Minimal frequency over-shoot
·Synthesized architecture
·Serial 3 wire interface
·Parallel interface for power-on
·Internal quartz reference oscillator driven by quartz crystal or PECL source
·PECL output can operate with either +3.3V or +5V VCC_OUT power supply
·External loop filter optimizes performance/cost
·Applications note (AN-06) for ease of design-ins
·Available in PLCC and SOIC 28-pin packages

簡(jiǎn)介

SY89429A屬于集成電路（IC）的時(shí)鐘發(fā)生器PLL頻率合成器。由制造生產(chǎn)的SY89429A時(shí)鐘發(fā)生器，PLL，頻率合成器時(shí)鐘發(fā)生器、PLL 和頻率合成器集成電路 (IC) 可為邏輯器件提供參考信號(hào)的穩(wěn)定定時(shí)脈沖，這些器件包括計(jì)算機(jī)、微控制器、數(shù)據(jù)通信系統(tǒng)和圖形/視頻發(fā)生器。這些集成電路可能包括緩沖器、驅(qū)動(dòng)器、分頻器、倍頻器、多路復(fù)用器、合成器、扇出分配器和預(yù)分頻器。