PI6C484321 datasheet(1/9 Pages) PERICOM

Part #	PI6C484321

Description	260MHz Crystal-to-3.3V Differential LVPECL Frequency Synthesizer

PDF	9 Pages

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Manufacturer	PERICOM [Pericom Semiconductor Corporation]

Direct Link	http://www.pericom.com

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1 / 9 page

1

PS8765A

08/01/05

Product Features

• Dual differential 3.3V LVPECL outputs

• Selectable crystal oscillator interface or LVCMOS/LVTTL

TEST_CLK

• Output frequency range: 53.33MHz to 366.67MHz

• Crystal input frequency range: 14MHz to 40MHz

• TEST_CLK freqeuncy range: 10MHz to 50MHz

• VCO range: 320MHz to 1.1GHz

• Parallel or serial interface for programming counter and

output dividers

• RMS period jitter: 3ps (typical)

• 3.3V supply voltage

• 0°C to 70°C ambient operating temperature

• Packages (Pb-free & Green available):

- 32-pin LQFP (FB)

PI6C484321

260MHz Crystal-to-3.3V Differential

LVPECL Frequency Synthesizer

Description

The PI6C484321 is a dual output, 3.3V LVPECL Frequency Syn-

thesizer using crystal as the input source. The input source is can

beselectedfromeither LVTTL/LVCMOSlevelinput(TEST_CLK

pin) or crystal inputs. The VCO operates at a frequency range of

320MHz to 1.1GHz. The VCO frequency is programmed in steps

equal to the value of the input reference or crystal frequency. The

VCO and output frequency can be programmed through a simple

2-wire serial interface or through 11-bit parallel interface. The low

phase noise characteristics of the PI6C484321 make it an ideal

clock source for Fibre Channel 1 (FC1), Fibre Channel 2 (FC2), 10

Gigabit Fibre Channel (10GFC), Gigabit Ethernet and 10 Gigabit

Ethernet (10GbE) applications.

Block Diagram

Pin Configuration

OSC

VCO_SEL

XTAL_SEL

TEST_CLK

XTAL1

XTAL2

S_LOAD

S_DATA

S_CLOCK

nP_LOAD

M0:M8

N0:N1

PLL

FOUT0

nFOUT0

FOUT1

nFOUT1

TEST

?

0

1

0

1

MR

÷M

VCO

PHASE DETECTOR

CONFIGURATION

INTERFACE

LOGIC

÷3

÷4

÷5

÷6

32 31 30 29 28 27 26 25

9 10 11 12 13 14 15 16

1

2

3

4

5

6

7

8

24

23

22

21

20

19

18

17

XTAL2

TEST_CLK

XTAL_SEL

VCCA

S_LOAD

S_DATA

S_CLOCK

MR

M5

M6

M7

M8

N0

N1

nc

VEE

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PI6C484321 Datasheet(PDF) 1 Page - Pericom Semiconductor Corporation

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