Datasheet > MPC947FAR2

MPC947FAR2

更新时间： 2024-11-11 21:11:55

品牌	Logo	应用领域
恩智浦 - NXP		PC 驱动输出元件逻辑集成电路
页数	文件大小	规格书
4页	261K
描述
947 SERIES, LOW SKEW CLOCK DRIVER, 9 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PQFP32, 7 X 7 MM, 0.80 MM PITCH, PLASTIC, LQFP-32

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MPC947FAR2 技术参数

生命周期：	Transferred	零件包装代码：	QFP
包装说明：	LQFP,	针数：	32
Reach Compliance Code：	unknown	HTS代码：	8542.39.00.01
风险等级：	5.47	其他特性：	WITH SYNCHRONOUS OUTPUT ENABLE; MEETS POWER PC & 620L2 CACHE SKEW REQUIREMENTS
系列：	947	输入调节：	MUX
JESD-30 代码：	S-PQFP-G32	长度：	7 mm
逻辑集成电路类型：	LOW SKEW CLOCK DRIVER	功能数量：	1
反相输出次数：		端子数量：	32
实输出次数：	9	最高工作温度：	70 °C
最低工作温度：		输出特性：	3-STATE
封装主体材料：	PLASTIC/EPOXY	封装代码：	LQFP
封装形状：	SQUARE	封装形式：	FLATPACK, LOW PROFILE
传播延迟（tpd）：	9.25 ns	认证状态：	Not Qualified
Same Edge Skew-Max（tskwd）：	0.5 ns	座面最大高度：	1.6 mm
最大供电电压 (Vsup)：	3.6 V	最小供电电压 (Vsup)：	3 V
标称供电电压 (Vsup)：	3.3 V	表面贴装：	YES
技术：	CMOS	温度等级：	COMMERCIAL
端子形式：	GULL WING	端子节距：	0.8 mm
端子位置：	QUAD	宽度：	7 mm
最小 fmax：	110 MHz	Base Number Matches：	1

MPC947FAR2 数据手册

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SEMICONDUCTOR TECHNICAL DATA

Order this document

by MPC947/D

Freescale Semiconductor, Inc.

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The MPC947 is a 1:9 low voltage clock distribution chip. The device

features the capability to select between two LVTTL compatible inputs

and fans the signal out to 9 LVCMOS or LVTTL compatible outputs.

These 9 outputs were designed and optimized to drive 50Ω series termi-

nated transmission lines. With output–to–output skews of 500ps, the

MPC947 is ideal as a clock distribution chip for synchronous systems

which need a tight level of skew at a relatively low cost. For a similar

product targeted at a higher price/performance point, consult the

MPC948 data sheet.

LOW VOLTAGE

1:9 CLOCK

DISTRIBUTION CHIP

• 2 Selectable LVCMOS/LVTTL Clock Inputs

• 500ps Maximum Output–to–Output Skew

• Drives Up to 18 Independent Clock Lines

• Maximum Output Frequency of 110MHz

• Synchronous Output Enable

• Tristatable Outputs

• 32–Lead LQFP Packaging

• 3.3V V_CCSupply Voltage

FA SUFFIX

32–LEAD LQFP PACKAGE

CASE 873A

With an output impedance of approximately 7Ω, in both the HIGH and

LOW logic states, the output buffers of the MPC947 are ideal for driving

series terminated transmission lines. More specifically, each of the 9

MPC947 outputs can drive two series terminated 50Ω transmission lines.

With this capability, the MPC947 has an effective fanout of 1:18 in ap-

plications using point–to–point distribution schemes. With this level of

fanout, the MPC947 provides enough copies of low skew clocks for high

performance synchronous systems, including use as a clock distribution

chip for the L2 cache of a PowerPC 620 based system.

Two independent LVCMOS/LVTTL compatible clock inputs are available. Designers can take advantage of this feature to

provide redundant clock sources or the addition of a test clock into the system design. With the select input pulled HIGH, the

TTL_CLK1 input will be selected.

All of the control inputs are LVCMOS/LVTTL compatible. The MPC947 provides a synchronous output enable control to allow

for starting and stopping of the output clocks. A logic high on the Sync_OE pin will enable all of the outputs. Because this control

is synchronized to the input clock, potential output glitching or runt pulse generation is eliminated. In addition, for board level test,

the outputs can be tristated via the tristate control pin. A logic LOW applied to the Tristate input will force all of the outputs into

high impedance. Note that all of the MPC947 inputs have internal pullup resistors.

The MPC947 is fully 3.3V compatible. The 32–lead LQFP package was chosen to optimize performance, board space and

cost of the device. The 32–lead LQFP has a 7x7mm body size with a conservative 0.8mm pin spacing.

MOTOROLA ADVANCED CLOCK DRIVERS DEVICE DATA

611

For More Information On This Product,

Go to: www.freescale.com

12 3 4

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与MPC947FAR2相关器件

型号	品牌	获取价格	描述	数据表
MPC948	MOTOROLA	获取价格	LOW VOLTAGE 1:12 CLOCK DISTRIBUTION CHIP
MPC948FA	MOTOROLA	获取价格	LVPECL/LVCMOS/LVTTL SERIES, LOW SKEW CLOCK DRIVER, 12 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S)
MPC948FAR2	IDT	获取价格	Low Skew Clock Driver, 948 Series, 12 True Output(s), 0 Inverted Output(s), CMOS, PQFP32,
MPC948FAR2	MOTOROLA	获取价格	LVPECL/LVCMOS/LVTTL SERIES, LOW SKEW CLOCK DRIVER, 12 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S)
MPC948L	MOTOROLA	获取价格	LOW VOLTAGE 1:12 CLOCK DISTRIBUTION CHIP
MPC948LFA	MOTOROLA	获取价格	暂无描述
MPC949	MOTOROLA	获取价格	LOW VOLTAGE 1:15 PECL TO CMOS CLOCK DRIVER
MPC949FA	IDT	获取价格	Low Skew Clock Driver, 949 Series, 15 True Output(s), 0 Inverted Output(s), CMOS, PQFP52,
MPC949FAR2	IDT	获取价格	Low Skew Clock Driver, 949 Series, 15 True Output(s), 0 Inverted Output(s), CMOS, PQFP52,
MPC949FAR2	MOTOROLA	获取价格	MPC900 SERIES, LOW SKEW CLOCK DRIVER, 15 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PQFP52, 10

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