Level Translators - Intersil - #2

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Why are level shifters needed? LC-079.0 Printed in USA 4/09 © 2009 Intersil Americas Inc. All Rights Reserved. The following are trademarks or registered trademarks of Intersil Americas Inc.: Intersil, Intersil logo, “i” and Design. All other trademarks are the property of the respective trademark owners. Voltage range +1.35V < VL < +3.2V (lower voltage logic supply) +2.2V < VCC < +3.6V (higher voltage peripheral supply) Fast data rates 100Mbps for VL 1.62V 85Mbps for VL 1.35V Auto-direction sensing IEC61000-4-2 ESD protection on the VL and VCC I/O pins 15kV air gap, 9kV contact 6 bidirectional channels ISL3035E - Additional clock return pin ISL3034E - Enable pin for software-controlled power down 4 bidirectional channels ISL3036E - Enable pin for software-controlled power down Industrial temp range (-40°C to +85°C) Small TQFN and ìTQFN package options • .. .. • .. .. • • .. • .. .. • .. • • Simplifi es the interconnection between two ICs operating at different supply voltages Interface components (RS-232/RS-485 transceivers, memory cards, etc.) typically operate at supply voltages of 3.3V or higher Core components (baseband processors, ìControllers, ASICs, and FPGAs) operate at lower supply voltages (currently 1.8V) Lower VCC logic typically cannot drive higher VCC logic without translation circuitry • .. .. .. Dual-supply level shifters solve the interfacing problem Shifts logic levels up/down to be compatible with each of the supply voltages Gives designers more fl exibility in choosing components for the application • .. .. ISL3035E CLOCK WAVEFORMS (100Mbps) TIME (4ns/DIV) CLK_RET OUTPUT (V) CLK_VL INPUT (V) CLK_VCC OUTPUT (V) 1 2 3 4 0 1 2 0 0 1 2 VCC = 3.6V, VL = 1.5V Voltage Level Translators Key Features High-Speed Data Transfer Intersil Main Offi ces NORTH AMERICA WEST COAST Intersil Headquarters 1001 Murphy Ranch Road Milpitas, CA 95035 (TEL) 408-432-8888 (FAX) 408-434-5351 1-888-INTERSIL 1-888-468-3774 EAST COAST 1650 Robert J Conlan Blvd NE Palm Bay, FL 32905 (TEL) 321-724-7000 (FAX) 321-729-7320 1-888-INTERSIL 1-888-468-3774 EUROPE Intersil GmbH Oskar-Messter-Str. 29 D-85737 Ismaning Germany (TEL) +49 89 46263 0 (FAX) +49 89 46263 148 ASIA PACIFIC Suite 1611, 16/F Tower 2 Silvercord, 30 Canton Road, Tsimshatsui, Kowloon Hong Kong (TEL) +852-2709-7600 (FAX) +852-2730-1433 JAPAN 6F, Mita Nitto Daibiru 3-11-36, Mita, Minato-ku Tokyo, 108-0073 Japan (TEL) +81-3-5439-2311 (FAX) +81-3-5439-2300