Datasheet > PI6C2973

PI6C2973

更新时间： 2024-11-25 23:27:39

品牌	Logo	应用领域
其他 - ETC		时钟驱动器
页数	文件大小	规格书
8页	164K
描述
Clock IC \| 3.3V. 125MHz. Selectable LVTTL/LVCMOS & LVPECL Inputs. Zero Delay Clock Driver w/ Programmable Divider

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PI6C2973 数据手册

PI6C2973

Low Voltage PLL Clock Driver

can be realized by pulsing low one clock edge prior to the

coincident edges of the Qa and Qc outputs. The Sync output will

indicate when the coincident rising edges of the above relation-

ships will occur. The Power–On Reset ensures proper program-

ming if the frequency select pins are set at power up. If the

fselFB2 pin is held high, it may be necessary to apply a reset after

power–up to ensure synchronization between the QFB output

and the other outputs. The internal power–on reset is designed

to provide this function, but with power–up conditions being

dependent, it is difficult to guarantee. All other conditions of the

fsel pins will automatically synchronize during PLL lock acquisi-

tion.

The PI6C2973 offers a very flexible output enable/disable scheme.

Note that all of the control inputs on the PI6C2973 have internal

pull–up resistors.

ThePI6C2973isfully3.3Vcompatibleandrequiresnoexternal

loopfiltercomponents.AllinputsacceptLVCMOS/LVTTL

compatible levels while the outputs provide LVCMOS levels with

the capability to drive 50 Ohm transmission lines. For series

terminated lines each PI6C2973 output can drive two 50 Ohm

lines in parallel thus effectively doubling the fanout of the

device.

Features

• FullyIntegratedPLL

• Output Frequency up to 125 MHz

• Compatible with PowerPC and Pentium Microprocessors

• 3.3VV

• + 100ps Typical Cycle–to–Cycle Jitter

• Packaging:

-52-pinLQFP

Description

ThePI6C2973are3.3Vcompatible,PLLbasedclockdriver

devices targeted for high-performance CISC or RISC processor

based systems. With output frequencies of up to 125 MHz and

skews of 550ps the PI6C2973 are ideally suited for most synchro-

nous systems. The devices offer twelve low skew outputs plus a

feedback and sync output for added flexibility and ease of

systemimplementation.

The PI6C2973 features an extensive level of frequency program-

mability between the 12 outputs as well as the input vs output

relationships. Using the select lines output frequency ratios of

1:1,2:1,3:1,3:2,4:1,4:3,5:1,5:2,5:3,6:1and6:5betweenoutputs

PinConfiguration-PI6C2973

39 38 37 36 35 34 33 32 31 30 29 28 27

fselFB1

QSync

GNDO

Qc0

fselb1

fselb0

fsela1

fsela0

Qa3

VCCO

Qc1

VCCO

Qa2

fselc0

fselc1

Qc2

GNDO

Qa1

VCCO

Qc3

VCCO

Qa0

GND0

Inv_Clk

GND0

VCO_Sel

9 10 11 12 13

PS8685

05/27/03

12 3 4 5 6 7 8

中文翻译

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与PI6C2973相关器件

型号	品牌	获取价格	描述	数据表
PI6C2973-2FC	PERICOM	获取价格	PLL Based Clock Driver, 6C Series, 12 True Output(s), 0 Inverted Output(s), CMOS, PQFP52,
PI6C2973FCE	PERICOM	获取价格	PLL Based Clock Driver, 6C Series, 12 True Output(s), 0 Inverted Output(s), PQFP52, LQFP-5
PI6C3420A	PERICOM	获取价格	27 MHz Spread Spectrum Clock Synthesizer
PI6C3420ATE	PERICOM	获取价格	27 MHz Spread Spectrum Clock Synthesizer
PI6C3421-1TEX	PERICOM	获取价格	Clock Generator, PDSO6,
PI6C3421A	PERICOM	获取价格	27MHz Spread Spectrum Clock Synthesizer
PI6C3421AITE	PERICOM	获取价格	Video Clock Generator, 27MHz, CMOS, PDSO6, GREEN, PLASTIC, SC-74A, SOT-23, 6 PIN
PI6C3421AITEX	PERICOM	获取价格	Video Clock Generator, 27MHz, CMOS, PDSO6, GREEN, PLASTIC, SC-74A, SOT-23, 6 PIN
PI6C3421ATE	PERICOM	获取价格	Video Clock Generator, 27MHz, CMOS, PDSO6, GREEN, PLASTIC, SC-74A, SOT-23, 6 PIN
PI6C3421ATEX	PERICOM	获取价格	Video Clock Generator, 27MHz, CMOS, PDSO6, GREEN, PLASTIC, SC-74A, SOT-23, 6 PIN

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