CDCLVP1208

LVPECL

8

8

Reference

Generator

GND

GND

OUTP[7...0]

OUTN[7...0]

V

AC_REF

V

CC

V

CC

V

CC

INP0

INN0

INP1

INN1

IN_SEL

CDCLVP1208

www.ti.com

SCAS890B

– OCTOBER 2009 – REVISED AUGUST 2011

Eight LVPECL Output,

High-Performance Clock 2:8 Buffer

Check for Samples: CDCLVP1208

1

FEATURES

DESCRIPTION

The CDCLVP1208 is a highly versatile, low additive

2

•

2:8 Differential Buffer

jitter buffer that can generate eight copies of LVPECL

•

Selectable Clock Inputs Through Control Pin

clock outputs from one of two selectable LVPECL,

•

Universal Inputs Accept LVPECL, LVDS, and

LVDS,

or

LVCMOS

inputs

for

a

variety

of

LVCMOS/LVTTL

communication applications. It has a maximum clock

frequency up to 2 GHz. The CDCLVP1208 features

•

Eight LVPECL Outputs

an on-chip multiplexer (MUX) for selecting one of two

•

Maximum Clock Frequency: 2 GHz

inputs that can be easily configured solely through a

•

Maximum Core Current Consumption: 73 mA

control pin. The overall additive jitter performance is

less than 0.1 ps, RMS from 10 kHz to 20 MHz, and

•

Very Low Additive Jitter:

<100 fs,rms in 10-kHz

overall output skew is as low as 20 ps, making the

to 20-MHz Offset Range

device a perfect choice for use in demanding

•

2.375 V to 3.6 V Device Power Supply

applications.

•

Maximum Propagation Delay: 450 ps

The CDCLVP1208 clock buffer distributes one of two

•

Maximum Output Skew: 20 ps

selectable clock inputs (IN0, IN1) to eight pairs of

•

differential LVPECL clock outputs (OUT0, OUT7) with

minimum

skew

for

clock

distribution.

The

for Capacitive-Coupled Inputs

CDCLVP1208 can accept two clock sources into an

•

Industrial Temperature Range:

–40°C to +85°C

input multiplexer. The inputs can be LVPECL, LVDS,

•

ESD Protection Exceeds 2 kV (HBM)

or LVCMOS/LVTTL.

•

Available in 5-mm

× 5-mm QFN-28 (RHD)

The CDCLVP1208 is specifically designed for driving

Package

50-

Ω transmission lines. When driving the inputs in

single-ended

mode,

the

LVPECL

bias

voltage

APPLICATIONS

input pin. However, for high-speed performance up to

•

Wireless Communications

2 GHz, differential mode is strongly recommended.

•

Telecommunications/Networking

The CDCLVP1208 is packaged in a small 28-pin,

•

Medical Imaging

5-mm x 5-mm QFN package and is characterized for

•

Test and Measurement Equipment

operation from

–40°C to +85°C.

1

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Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright

© 2009–2011, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.