LVPECL

4

4

Reference

Generator

GND

OUTP[3...0]

OUTN[3...0]

V

CC

V

AC_REF

INP0

INN0

INP1

INN1

IN_SEL

CDCLVP1204

www.ti.com

SCAS880C

– AUGUST 2009 – REVISED AUGUST 2011

Four LVPECL Output,

High-Performance Clock Buffer

Check for Samples: CDCLVP1204

1

FEATURES

DESCRIPTION

The CDCLVP1204 is a highly versatile, low additive

2

•

2:4 Differential Buffer

jitter buffer that can generate four 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 CDCLVP1204 features

•

Four 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: 45 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 15 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 CDCLVP1204 clock buffer distributes one of two

•

Maximum Output Skew: 15 ps

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

•

differential LVPECL clock outputs (OUT0, OUT3) with

minimum

skew

for

clock

distribution.

The

for Capacitive-Coupled Inputs

CDCLVP1204 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 3-mm

× 3-mm QFN-16 (RGT)

The CDCLVP1204 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 CDCLVP1204 is packaged in a small 16-pin,

•

Medical Imaging

3-mm x 3-mm QFN package and is characterized for

•

Test and Measurement Equipment

operation from

–40°C to +85°C.

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

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.