描述 Description

The SY89200U is a 2.5V precision, high-speed, integrated clock divider and LVDS fanout buffer capable of handling clocks up to 1.5GHz. Optimized for communications applications, the three independently controlled output banks are phase matched and can be configured for pass through (÷1), ÷2 or ÷4 divider ratios.The differential input includes Micrel's unique, 3-pin input termination architecture that allows the user to interface to any differential signal path. The low-skew, low-jitter outputs are LVDS-compatible with extremely fast rise/fall times guaranteed to be less than 150ps.The EN (enable) input guarantees that the ÷1, ÷2 and ÷4 outputs will start from the same state without any runt pulse after an asynchronous master rest (MR) is asserted. This is accomplished by enabling the outputs after a four-clock delay to allow the counters to synchronize.The SY89200U is part of Micrel's Precision Edge??product family.

特性 Features

? Three low-skew LVDS output banks with programmable ÷1, ÷2 and ÷4 divider options
? Three independently programmable output banks
? Guaranteed AC performance over temperature and voltage:
? Accepts a clock frequency up to 1.5GHz
? <900ps IN-to-OUT propagation delay
? <150ps rise/fall time
? <50ps bank-to-bank phase offset
? Ultra-low jitter design:
? <1psRMS?random jitter
? <10psPP?total jitter (clock)
? Patent-pending input termination and VT?pin accepts DC- and AC-coupled inputs (CML, PECL, LVDS)
? LVDS-compatible outputs
? CMOS/TTL-compatible output enable (EN) and divider select control
? 2.5V ±5% power supply
? -40°C to +85°C temperature range
? Available in 32-pin (5mm x 5mm) QFN package

簡介

SY89200U屬于集成電路（IC）的時鐘緩沖器驅(qū)動器。由制造生產(chǎn)的SY89200U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。