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MC88915FN55R2 PDF预览

MC88915FN55R2

更新时间: 2024-09-17 19:35:23
品牌 Logo 应用领域
艾迪悌 - IDT 驱动逻辑集成电路
页数 文件大小 规格书
14页 291K
描述
PLL Based Clock Driver, 88915 Series, 7 True Output(s), 1 Inverted Output(s), CMOS, PQCC28, PLASTIC, LCC-28

MC88915FN55R2 技术参数

是否Rohs认证: 不符合生命周期:Obsolete
零件包装代码:QLCC包装说明:QCCJ, LDCC28,.5SQ
针数:28Reach Compliance Code:not_compliant
HTS代码:8542.39.00.01风险等级:5.63
其他特性:MULTIPLE SELECTABLE FREQUENCY RELATIONS FOR THE CLOCK O/PS; O/P FREQUENCY RATIOS ARE 0.5F/1.0F/2.0F系列:88915
输入调节:MUXJESD-30 代码:S-PQCC-J28
JESD-609代码:e0长度:11.505 mm
逻辑集成电路类型:PLL BASED CLOCK DRIVER最大I(ol):0.036 A
湿度敏感等级:1功能数量:1
反相输出次数:1端子数量:28
实输出次数:7最高工作温度:70 °C
最低工作温度:封装主体材料:PLASTIC/EPOXY
封装代码:QCCJ封装等效代码:LDCC28,.5SQ
封装形状:SQUARE封装形式:CHIP CARRIER
峰值回流温度(摄氏度):220电源:5 V
认证状态:Not QualifiedSame Edge Skew-Max(tskwd):0.75 ns
座面最大高度:4.57 mm子类别:Clock Drivers
最大供电电压 (Vsup):5.25 V最小供电电压 (Vsup):4.75 V
标称供电电压 (Vsup):5 V表面贴装:YES
技术:CMOS温度等级:COMMERCIAL
端子面层:Tin/Lead (Sn85Pb15)端子形式:J BEND
端子节距:1.27 mm端子位置:QUAD
处于峰值回流温度下的最长时间:30宽度:11.505 mm
最小 fmax:55 MHzBase Number Matches:1

MC88915FN55R2 数据手册

 浏览型号MC88915FN55R2的Datasheet PDF文件第2页浏览型号MC88915FN55R2的Datasheet PDF文件第3页浏览型号MC88915FN55R2的Datasheet PDF文件第4页浏览型号MC88915FN55R2的Datasheet PDF文件第5页浏览型号MC88915FN55R2的Datasheet PDF文件第6页浏览型号MC88915FN55R2的Datasheet PDF文件第7页 
MC88915  
Low Skew CMOS PLL Clock Drivers  
The MC88915 Clock Driver utilizes phase-locked loop technology to lock its low skew  
outputs' frequency and phase onto an input reference clock. It is designed to provide clock  
distribution for high performance PC's and workstations.  
MC88915  
The PLL allows the high current, low skew outputs to lock onto a single clock input and  
distribute it to multiple components on a board. The PLL also allows the MC88915 to  
multiply a low frequency input clock and distribute it locally at a higher (2X) system  
frequency. Multiple 88915's can lock onto a single reference clock, which is ideal for  
applications when a central system clock must be distributed synchronously to multiple  
boards (see Figure 9).  
LOW SKEW CMOS PLL  
CLOCK DRIVER  
Five “Q” outputs (QO-Q4) are provided with less than 500 ps skew between their rising  
edges. The Q5 output is inverted (180° phase shift) from the “Q” outputs. The 2X_Q output  
runs at twice the “Q” output frequency, while the Q/2 runs at 1/2 the “Q” frequency.  
The VCO is designed to run optimally between 20 MHz and the 2X_Q Fmax  
specification. The wiring diagrams in Figure 5 detail the different feedback configurations  
which create specific input/output frequency relationships. Possible frequency ratios of the  
“Q” outputs to the SYNC input are 2:1, 1:1, and 1:2.  
The FREQ_SEL pin provides one bit programmable divide-by in the feedback path of  
the PLL. It selects between divide-by-1 and divide-by-2 of the VCO before its signal  
reaches the internal clock distribution section of the chip (see the block diagram on page  
2). In most applications FREQ_SEL should be held high (÷1). If a low frequency reference  
clock input is used, holding FREQ_SEL low (÷2) will allow the VCO to run in its optimal  
range (>20 MHz).  
FN SUFFIX  
28-LEAD PLCC PACKAGE  
CASE 776-02  
In normal phase-locked operation, the PLL_EN pin is held high. Pulling the PLL_EN pin  
low disables the VCO and puts the 88915 in a static “test mode”. In this mode there is no  
frequency limitation on the input clock, which is necessary for a low frequency board test  
environment. The second SYNC input can be used as a test clock input to further simplify  
board-level testing (see detailed description on page 11).  
A lock indicator output (LOCK) will go high when the loop is in steady-state phase and  
frequency lock. The LOCK output will go low if phase-lock is lost or when the PLL_EN pin  
is low. Under certain conditions the lock output may remain low, even though the part is  
phase-locked. Therefore, the LOCK output signal should not be used to drive any active  
circuitry; it should be used for passive monitoring or evaluation purposes only.  
EI SUFFIX  
28-LEAD PLCC PACKAGE  
Pb-FREE PACKAGE  
CASE 776-02  
Features  
Five outputs (Q0–Q4) with output-output skew < 500 ps, each being phase and frequency locked to the SYNC input  
The phase variation from part-to-part between the SYNC and FEEDBACK inputs is less than 550 ps (derived from the tPD specification,  
defining the part-to-part skew).  
Input/output phase-locked frequency ratios of 1:2, 1:1, and 2:1 are available  
Input frequency range from 5 MHz – 2X_Q fmax specification  
Additional outputs available at 2X and +2 the system “Q” frequency. Also, a Q (180° phase shift) output available  
All outputs have ±36 mA drive (equal high and low) at CMOS levels, and can drive either CMOS or TTL inputs. All inputs are  
TTL-level compatible.  
Test mode pin (PLL_EN) provided for low frequency testing. Two selectable CLOCK inputs for test or redundancy purposes.  
28-lead Pb-free package available.  
IDT™ / ICS™ CMOS PLL CLOCK DRIVERS  
1
MC88915 REV 6 JULY 10, 2007  

MC88915FN55R2 替代型号

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