SY89228U数据手册集成电路（IC）的时钟发生器PLL频率合成器规格书PDF

描述 Description

The SY89228U is a precision, low jitter 1GHz ÷3, ÷5 clock divider with an LVPECL output. A unique Fail-Safe Input (FSI) protection prevents metastable output conditions when the input clock voltage swing drops significantly below 100mV or input is removed.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 800mV, 100K-compatible LVPECL with fast rise/fall times guaranteed to be less than 270ps.The SY89228U operates from a 2.5V ±5% or 3.3V ±10% supply and is guaranteed over the full industrial temperature range of -40°C to +85°C. The SY89228U 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, LVPECL output
• Fail-Safe Input
• Prevents oscillations when input is invalid
• Guaranteed AC performance over temperature and supply voltage:
• DC-to >1.0GHz throughput
• <1500ps Propagation Delay (In-to-Q)
• <270ps 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
• 800mV LVPECL output
• 46% to 54% Duty Cycle(÷ 3)
• 47% to 53% Duty Cycle(÷ 5)
• 2.5V ±5% or 3.3V ±10% supply voltage
• -40°C to +85°C industrial temperature range
• Available in 16-pin (3mm x 3mm) QFN package

简介

SY89228U属于集成电路（IC）的时钟发生器PLL频率合成器。由制造生产的SY89228U时钟发生器，PLL，频率合成器时钟发生器、PLL 和频率合成器集成电路 (IC) 可为逻辑器件提供参考信号的稳定定时脉冲，这些器件包括计算机、微控制器、数据通信系统和图形/视频发生器。这些集成电路可能包括缓冲器、驱动器、分频器、倍频器、多路复用器、合成器、扇出分配器和预分频器。