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Specifications are subject to change without notice.
1
CTSLV31
Ultra-Low Phase Noise LVPECL, LVDS Buffer and Translator with Gain
SON8, MSOP8
RevB0215
DESCRIPTION
The CTSLV315 is a configurable LVPECL, LVDS buffer & translator IC that is optimized for ultra-low
phase noise and 2.5V-3.3V nominal supply voltage. It is particularly useful in converting crystal or
SAW based oscillators into LVPECL and LVDS outputs for up to 1GHz of bandwidth.
Recommended for applications with signal levels below 0.6 Vp-p. For applications with higher signal
levels that do not require gain, refer to the CTSLV310. CTS encourages the user to try both devices
to determine which is best suited for a particular application.
A configurable IC design capable of providing LVPECL or LVDS outputs, ÷1 or ÷2 function, and active
high or active low enable selection. See Table 1 for details of the configurations options that provide
designers with a single IC buffer/translator solution that is extremely compact, flexible and high
performance.
8 configurations which are determined by the static voltage levels of b-0 and b-1. Table 1 details the
configurations.
BLOCK DIAGRAM
Table 1 - Possible IC Configuration
Configuration Bits Functional Configuration
b-0 b-1 Output Type Enable Polarity Division
Open Open LVPECL Active High ÷1
Open Low LVPECL Active High ÷2
Open High LVPECL Active Low ÷1
Low Open LVPECL Active Low ÷2
Low Low LVDS Active High ÷1
Low High LVDS Active High ÷2
High Open LVDS Active Low ÷1
High Low LVDS Active Low ÷2
High High Not Used Not Used Not Used
FEATURES
2.5V-3.3V Operation
Ultra-Low Phase Noise Floor
o LVPECL -167dBc/Hz
o LVDS -165dBc/Hz
Configurable
o LVPECL or LVDS Output
o ÷1 or ÷2
o Enable Active High or Low
1GHz+ Bandwidth
RoHS Compliant Pb Free Packages
