CTSLV353 Low Phase Noise LVPECL Buffer and Translator QFN8, SON8 Features Block Diagram LVPECL Outputs Optimized for Very Low Phase Noise (-165dBc/Hz) Up to 800MHz Bandwidth Selectable 1, 2 Output Selectable Enable Logic 3.0V to 3.6V Operation RoHS Compliant Pb Free Packages Description The CTS LV353 is a sine wave/CMOS to LVPECL buffer/translator optimized for very low phase noise (- 165dB c/Hz). It is particularly useful in converting crystal or SAW based oscillators into LVPECL outputs for up 800M Hz of bandwidth. For greater bandwidth, refer to the CTSLV363. The CTS LV353 is one of a family of parts that provide options of fixed 1, fixed 2 and selectable 1, 2 mode s as well as active high enable or active low enable to oscillator designers. Refer to Table 1 for the comp arison of parts within the CTSLV35x and CTSLV363 family. Engineering Notes Functionality The CTSLV353 is one of a family of parts that provide options of fixed 1, fixed 2 and selectable 1, 2 modes as well as active high enable or active low enable to oscillator designers. Table 1 details the differences between the parts to assist designers in selecting the optimal part for their design. Table 2 lists the specific CTSLV353 functional operation. Figure 1 plots the S-parameters of the D input. S-parameter and IBIS model files for the CTSLV353 are also available for download. Table 1 - CTSP51-54 & CTSP63 Family EN Pull-Up / Part Number Divide Ratio EN Logic Bandwidth Pull-Down CTSLV351 1 active HIGH Pull-up > 800MHz CTSLV353 Selectable 1 or 2 selectable selectable > 800MHz CTSLV363 Selectable 1 or 2 selectable selectable 1GHz North Americas: +1-800-757-6686 International: +1-508-435-6831 Asia: +65-655-17551 www.ctscorp.com/semiconductors Specifications are subject to change without notice. 1 RevB0614CTSLV353 Low Phase Noise LVPECL Buffer and Translator QFN8, SON8 Table 2 - CTSLV353 Functional Operation, 1 mode Inputs Outputs Part Number EN SEL EN D Q Q Low Low High Low, NC High High Low High, NC High X Z Z Low Low High High, NC High High Low Low CTSLV353 Low X Z Z DIV SEL Divide Ratio Low, NC 1 High 2 Figure 1 - S11, Parameters, D Input North Americas: +1-800-757-6686 International: +1-508-435-6831 Asia: +65-655-17551 www.ctscorp.com/semiconductors Specifications are subject to change without notice. 2 RevB0614