8T73S208A-01 datasheet(1/22 Pages) IDT

No. de pieza	8T73S208A-01

Descripción Electrónicos	One differential input reference clock

PDF	22 Pages

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Fabricante Electrónico	IDT [Integrated Device Technology]

Página de inicio	http://www.idt.com

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DATA SHEET

2.5V, 3.3V Differential LVPECL Clock

Divider and Buffer

8T73S208A-01

8T73S208A-01 REVISION 1 06/15/15

1

General Description

The 8T73S208A-01 is a high-performance differential LVPECL clock

divider and fanout buffer. The device is designed for the frequency

division and signal fanout of high-frequency, low phase-noise clocks.

The 8T73S208A-01 is characterized to operate from a 2.5V and 3.3V

power supply. Guaranteed output-to-output and part-to-part skew

characteristics make the 8T73S208A-01 ideal for those clock

distribution applications demanding well-defined performance and

repeatability. The integrated input termination resistors make

interfacing to the reference source easy and reduce passive

component count. Each output can be individually enabled or

disabled in the high-impedance state controlled by a I2C register. On

power-up, all outputs are disabled.

Features

• One differential input reference clock

• Differential pair can accept the following differential input

levels: LVDS, LVPECL, CML

• Integrated input termination resistors

• Eight LVPECL outputs

• Selectable clock frequency division of ÷1, ÷2, ÷4 and ÷8

• Maximum input clock frequency: 1GHz

• LVCMOS interface levels for the control inputs

• Individual output enable/disabled by I2C interface

• Power-up state: all outputs disabled

• Output skew: 60ps (maximum)

• Output rise/fall times: 350ps (maximum)

• Low additive phase jitter, RMS: 182fs (typical)

• Full 2.5V and 3.3V supply voltages

• Lead-free (RoHS 6) 32-Lead VFQFN packaging

• -40°C to 85°C ambient operating temperature

Block Diagram

Pin Assignment

fREF

8

2

IN

nIN

VT

FSEL[1:0]

SDA

SCL

ADR[1:0]

Q0

nQ0

Q1

nQ1

Q2

nQ2

Q3

nQ3

Q4

nQ4

Q5

nQ5

Q6

nQ6

Q7

nQ7

÷1, ÷2,

÷4, ÷8

50



50



Pullup

Pulldown (2)

I2C

32

1

VCCO

VEE

Q6

nQ6

Q7

nQ7

VEE

FSEL0

VEE

nQ1

Q1

nQ0

Q0

VEE

ADR1

2

3

4

5

6

7

8

9

10111213141516

24

23

22

21

20

19

18

17

31 30 29 28 27 26 25

32-pin, 5mm x 5mm VFQFN

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