描述 Description

The SY89231U is a precision, low jitter 3.2GHz ÷3, ÷5 clock divider with a LVDS output. The differential input includes Micrel's unique, 3-pin internal termination architecture that allows the input to interface to any differential signal (AC- or DC-coupled) as small as 100mV (200mVPP) without any level shifting or termination resistor networks in the signal path. The outputs are 325mV, 100K-compatible LVDS with fast rise/fall times guaranteed to be less than 200ps.The SY89231U operates from a 2.5V ±5% supply and is guaranteed over the full industrial temperature range of -40°C to +85°C. The SY89231U is part of Micrel's high-speed, Precision Edge??product line.

特性 Features

? Accepts a high-speed input and provides a precision ÷3 and ÷5 sub-rate, LVDS output
? Guaranteed AC performance over temperature and supply voltage:
? DC-to >3.2GHz throughput
? <810ps Propagation Delay (In-to-Q)
? <200ps Rise/Fall times
? Ultra-low jitter design:
? <1psRMS?random jitter
? <1psRMS?cycle-to-cycle jitter
? <10psPP?total jitter (clock)
? <0.7psRMS?MUX crosstalk induced jitter
? Unique patented internal termination and VT?pin accepts DC- and AC-coupled inputs (CML, PECL, LVDS)
? Wide input voltage range VCC?to GND
? 325mV LVDS output
? 45% to 55% Duty Cycle (÷ 3)
? 47% to 53% Duty Cycle (÷ 5)
? 2.5V ±5% supply voltage
? -40°C to +85°C industrial temperature range
? Available in 16-pin (3mm x 3mm) QFN package

簡介

SY89231U屬于集成電路（IC）的時鐘發(fā)生器PLL頻率合成器。由制造生產(chǎn)的SY89231U時鐘發(fā)生器，PLL，頻率合成器時鐘發(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的穩(wěn)定定時脈沖，這些器件包括計算機、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。