system controller level shifter sd card v l v cc i/ov l i/ov l isl3035e clk_ret i/ov l i/ov l i/ov l gnd i/ov cc i/ov cc i/ov cc i/ov cc i/ov cc clk_v l clk_v cc dat3 dat2 dat1 dat0 cmd clock gnd gnd +3.3v dat3 dat2 clock_in dat1 dat0 cmd clock +1.8v 0.1 f 0.1 f +1.8v 1 f +3.3v auto-direction sensing eliminates direction control logic pins and associated software control. 100mbps data rate supports high-speed sd memory cards. tiny 2.6mm x 1.8mm 16 leadless tqfn package. intersil interface products www.intersil.com/interface best-in-class esd protected level translators connecting the level shifter to the two-system supplies allows it to shift voltages up/down for compatibility in mixed supply systems. 15kv esd protection (hbm and iec61000-4-2 air gap) on both the v cc and v l sides provides superior protection from esd events. these devices are small and located next to connectors making them vulnerable on both supply sides. intersil?s voltage level translators part number package type data rate (mbps) number of channels en pin? i/o v l shdn state i/o v cc shdn state isl3034e 16 ld tqfn, 16 ld tqfn 100 6 yes 16.5k to v l 16.5k to v cc isl3035e 16 ld tqfn, 16 ld tqfn 100 6 no 75k to v l high impedance isl3036e 16 ld tqfn, 14 ld qfn 100 4 yes 16.5k to v l 16.5k to v cc the isl3034e/35e/36e run at 100mbps in 4/6 channel con gurations.
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 tr ademarks 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 < v l < +3.2v (lower voltage logic supply) +2.2v < v cc < +3.6v (higher voltage peripheral supply) fast data rates 100mbps for v l 1.62v 85mbps for v l 1.35v auto-direction sensing iec61000-4-2 esd protection on the v l and v cc 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 (-40c to +85c) small tqfn and tqfn package options ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? simpli 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, controllers, asics, and fpgas) operate at lower supply voltages (currently 1.8v) lower v cc logic typically cannot drive higher v cc 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 exibility in choosing components for the application ? ? ? isl3035e clock waveforms (100mbps) time (4ns/div) clk_v l input (v) clk_ret output (v) clk_v cc output (v) 1 2 3 4 0 1 2 0 0 1 2 v cc = 3.6v, v l = 1.5v voltage level translators key features high-speed data transfer intersil main of 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
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