industrial temperature range idt74cbtlv3384 low-voltage 10-bit bus switch 1 september 2001 industrial temperature range the idt logo is a registered trademark of integrated device technology, inc. ? 2001 integrated device technology, inc. dsc-5742/1 idt74cbtlv3384 functional block diagram features: ?5 ? ? ? ? ? a/b bi-directional bus switch ? isolation under power-off conditions ? over-voltage tolerant ? latch-up performance exceeds 100ma ?v cc = 2.3v - 3.6v, normal range ? esd > 2000v per mil-std-883, method 3015; > 200v using machine model (c = 200pf, r = 0) ? available in ssop, qsop and tssop packages applications: ? 3.3v high speed bus switching and bus isolation simplified schematic, each switch low-voltage 10-bit bus switch description: the cbtlv3384 is a ten bit high-speed bus switch with low on-state resistance of the switch allowing connections to be made with minimal propagation delay. the device is organized as dual 5-bit bus switches with separate output- enable ( oe ) inputs, to allow use as two 5-bit bus switches or one 10-bit bus switch. when oe is low, the associated 5-bit bus switch is on and a port is connected to b port. when oe is high, the switch is open, and a high- impedance state exists between the two ports. to ensure the high-impedance state during power up or power down, oe should be tied to v cc through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver. 3 11 1 1a1 1a5 1oe sw sw 1b5 1b1 2 10 14 22 13 2a1 2a5 2oe sw sw 2b5 2b1 15 10 oe a b
industrial temperature range 2 idt74cbtlv3384 low-voltage 10-bit bus switch pin configuration ssop/ qsop/ tssop top view symbol description max unit v cc supplyvoltage range ?0.5 to +4.6 v v i input voltage range ?0.5 to +4.6 v continuous channel current 128 ma i ik input clamp current, v i/o < 0 ?50 ma t stg storage temperature ?65 to +150 c absolute maximum ratings (1) note: 1. stresses greater than those listed under absolute maximum ratings may cause permanent damage to the device. this is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. exposure to absolute maximum rating conditions for extended periods may affect reliability. note: 1. h = high voltage level l = low voltage level z = high impedance input inputs/outputs 1oe 2oe 1 b 1 - 1 b 52 b 1 - 2 b 5 ll 1 a 1 - 1 a 52 a 1 - 2 a 5 lh 1 a 1 - 1 a 5 z hl z 2 a 1 - 2 a 5 hh z z function table (1) symbol parameter test conditions min. max. unit v cc supply voltage 2.3 3.6 v v ih high-level control input voltage v cc = 2.3v to 2.7v 1.7 ? v v cc = 2.7v to 3.6v 2 ? v il low-level control input voltage v cc = 2.3v to 2.7v ? 0.7 v v cc = 2.7v to 3.6v ? 0.8 t a operating free-air temperature ? 40 85 c operating characteristics, t a = 25c (1) note: 1. all unused control inputs of the device must be held at v cc or gnd to ensure proper device operation. v cc 2a 5 2a 4 2b 4 2b 3 2a 3 2a 2 2b 2 2b 1 1b 1 1a 1 1a 2 1b 2 1b 3 1a 3 1a 4 1b 4 1b 5 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 1 1oe 21 22 23 24 2a1 2oe 1a 5 gnd 2b 5
industrial temperature range idt74cbtlv3384 low-voltage 10-bit bus switch 3 symbol parameter test conditions min. typ. max. unit v ik control inputs, data i/o v cc = 3v, i i = ?18ma ? ? ?1.2 v i i control inputs, data i/o v cc = 3.6v, v i = v cc or gnd ? ? 1a i oz data i/o v cc = 3.6v, v o = 0 or 3.6v, switch disabled ? ? 5 a i off v cc = 0, v i or v o = 0 to 3.6v ? ? 50 a i cc v cc = 3.6v, i o = 0, v i = v cc or gnd ? ? 10 a ? i cc (1) control inputs v cc = 3.6v, one input at 3v, other inputs at v cc or gnd ? ? 300 a c i control inputs v i = 3v or 0 ? 4 ? pf c io(off) v o = 3v or 0, oe = v cc ?7 ?pf max. at v cc = 2.3v v i = 0 i o = 64ma ? 5 8 typ. at v cc = 2.5v i o = 24ma ? 5 8 r on (2) v i = 1.7v i o = 15ma ? 27 40 ? v i = 0 i o = 64ma ? 5 7 v cc = 3v i o = 24ma ? 5 7 v i = 2.4v i o = 15ma ? 10 15 dc electrical characteristics over operating range following conditions apply unless otherwise specified: operating conditions: t a = ?40c to +85c notes: 1. the increase in supply current is attributable to each current that is at the specified voltage level rather than v cc or gnd. 2. this is measured by the voltage drop between the a and b terminals at the indicated current through the switch. on-state res istance is determined by the lower of the voltages of the two (a or b ) terminals. note: 1. the propagation delay is the calculated rc time constant of the typical on-state resistance of the switch and the specified l oad capacitance driven by an ideal voltage source (zero output impedance). switching characteristics v cc = 2.5v 0.2v v cc = 3.3v 0.3v symbol parameter min. max. min. max. unit t pd (1) propagation delay ? 0.15 ? 0.25 ns a to b or b to a t en output enable time 1 5 1 4.3 ns oe to a or b t dis output disable time 1 5.5 1 5.5 ns oe to a or b
industrial temperature range 4 idt74cbtlv3384 low-voltage 10-bit bus switch open v load gnd v cc pulse generator d.u.t. 500 ? 500 ? c l r t v in v out (1, 2) same phase input transition opposite phase input transition 0v 0v v oh v ol t plh t phl t phl t plh output v ih v t v t v ih v t control input t plz 0v output normally low t pzh 0v switch closed output normally high enable disable switch open t phz 0v v ol + v lz v oh v t v t t pzl v load/2 v load/2 v ih v t v ol v oh - v hz test circuits and waveforms test circuits for all outputs enable and disable times propagation delay notes: 1. pulse generator for all pulses: rate 10mhz; t f 2.5ns; t r 2.5ns. 2. pulse generator for all pulses: rate 10mhz; t f 2ns; t r 2.5ns. definitions: c l = load capacitance: includes jig and probe capacitance. r t = termination resistance: should be equal to z out of the pulse generator. symbol v cc (1) = 3.3v0.3v v cc (2) = 2.5v0.2v unit v load 6 2 x vcc v v ih 3 vcc v v t 1.5 vcc / 2 v v lz 300 150 mv v hz 300 150 mv c l 50 30 pf test conditions test switch t plz /t pzl v load t phz /t pzh gnd t pd open switch position
industrial temperature range idt74cbtlv3384 low-voltage 10-bit bus switch 5 idt xx cbtlv xxx xx package device type temp. range py q pg 74 shrink small outline package quarter-size small outline package thin shrink small outline package low-voltage 10-bit bus switch ?40c to +85c 3384 ordering information corporate headquarters for sales: for tech support: 2975 stender way 800-345-7015 or 408-727-6116 logichelp@idt.com santa clara, ca 95054 fax: 408-492-8674 (408) 654-6459 www.idt.com
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