描述 Description

The ZL40240 is a programmable or hardware pin controlled low additive jitter, low power 3 x 10 LVCMOS fanout buffer. Two inputs can accept signal in differential (LVPECL, SSTL, LVDS, HSTL, CML ) or single ended (LVPECL or LVCMOS) format and the third input can accept a single ended signal or it can be used to build a crystal oscillator by connecting an external crystal resonator between its XIN and XOUT pins. All the other components for building crystal oscillator are built in device such as load capacitance, series and shunt resistors.The ZL40240 has ten LVCMOS outputs which can be powered from 3.3V, 2.5V, 1.8V or 1.5V supply. Each output can be independently enabled/disabled via SPI bus. In addition, the strength of each output can be programmed.The device operates from 2.5V+/-5% or 3.3V+/-5% supply. Its operation is guaranteed over the industrial temperature range -40°C to +85°C.

特性 Features

3 to 1 input Multiplexer: Two inputs accept any differential (LVPECL, HCSL, LVDS, SSTL,CML, LVCMOS) or a single ended signal and the third input accepts a crystal or a single ended signal
Ten 1.5V/1.8V/2.5V/3.3V LVCMOS outputs
Supports frequencies from 0 to 250MHz
Ultra-low system level additive jitter: 17fs (12kHz to 20MHz)
Ultra-low noise floor of -170dBc/Hz
Supports crystals from 8MHz to 160MHz
Supports 2.5V or 3.3V power supplies
Output to output skew of 30ps (typical)
Input to output delay of 2ns (typical)
SPI or Hardware control

簡介

ZL40240屬于集成電路（IC）的時鐘緩沖器驅(qū)動器。由制造生產(chǎn)的ZL40240時鐘緩沖器，驅(qū)動器時鐘緩沖器和驅(qū)動器集成電路產(chǎn)品族中的產(chǎn)品用于幫助信號在系統(tǒng)中傳輸，常用作頻率/時間參考信號，以同步系統(tǒng)內(nèi)的活動。盡管這些器件最常用到的功能就是緩沖（即，為使信號不受驅(qū)動負(fù)載的影響而從某個信號源復(fù)制信號），但是該產(chǎn)品族中的某些器件還能執(zhí)行其他功能，例如選擇性改變緩沖信號路徑、按某個整數(shù)值分割信號頻率，或進(jìn)行所用電信號格式轉(zhuǎn)換。