ICS84314 データシートの表示（PDF） - Integrated Circuit Systems

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ICS84314

350MHZ, CRYSTAL-TO-3.3V/2.5V LVPECL FREQUENCY SYNTHESIZER W/FANOUT BUFFER

Integrated Circuit Systems 

Integrated

Circuit

Systems, Inc.

ICS84314

350MHZ, CRYSTAL-TO-3.3V/2.5V LVPECL

FREQUENCY SYNTHESIZER W/FANOUT BUFFER

GENERAL DESCRIPTION

ICS

The ICS84314 is a general purpose quad output

frequency synthesizer and a member of the

HiPerClockS™ HiPerClockS™ family of High Performance Clock

Solutions from ICS. When the device uses par-

allel loading, the M bits are programmable and

the output divider is hard-wired for divide by 2 thus providing

a frequency range of 125MHz to 350MHz. In serial program-

ming mode, the M bits are programmable and the output di-

vider can be set for either divide by 2 or divide by 4, providing

a frequency range of 62.5MHz to 350MHz. The low cycle-

cycle jitter and broad frequency range of the ICS84314 make

it an ideal clock generator for a variety of demanding applica-

tions which require high performance.

FEATURES

• Fully integrated PLL

• 4 differential 3.3V or 2.5V LVPECL outputs

• Selectable crystal oscillator interface

or LVCMOS TEST_CLK input

• Output frequency range: 62.5MHz to 350MHz

• VCO range: 250MHz to 700MHz

• Parallel interface for programming counter

and output dividers during power-up

• Serial 3 wire interface

• Cycle-to-cycle jitter: 23ps (typical)

• Output skew: 16ps (typical)

• Output duty cycle: 49% < odc < 51%, fout ≤ 125MHz

• Full 3.3V or mixed 3.3V core, 2.5V operating supply

• 0°C to 85°C ambient operating temperature

• Lead-Free package available

BLOCK DIAGRAM

PIN ASSIGNMENT

VCO_SEL

XTAL_SEL

TEST_CLK

0

32 31 30 29 28 27 26 25

M4 1

M5 2

24 TEST_CLK

23 XTAL_SEL

XTAL1

XTAL2

OSC

1

÷ 16

M6 3

M7 4

M8 5

VEE 6

ICS84314

2 2 VCCA

21 S_LOAD

20 S_DATA

19 S_CLOCK

VCC 7

18 MR

PLL

PHASE DETECTOR

Q0

nQ0

VCCO

8

17

9 10 11 12 13 14 15 16

VCCO

MR

Q1

VCO

0

÷2

nQ1

÷M

÷4

Q2

1

nQ2

S_LOAD

S_DATA

S_CLOCK

nP_LOAD

÷2

CONFIGURATION

INTERFACE

LOGIC

Q3

32-Lead LQFP

nQ3

7mm x 7mm x 1.4mm package body

Y Package

Top View

M0:M8

84314AY

www.icst.com/products/hiperclocks.html

1

REV. C JANUARY 27, 2005

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