1 industrial temperature range idt74cbtlv3862 low-voltage 10-bit bus switch with active high and low enables april 2002 2002 integrated device technology, inc. dsc-5264/2 c industrial temperature range applications: ? 3.3v high speed bus switching and bus isolation features: ?5 a/b bi-directional 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 the idt logo is a registered trademark of integrated device technology, inc. idt74cbtlv3862 low-voltage 10-bit bus switch with active high and low enables simplified schematic, each switch functional block diagram description: the cbtlv3862 provides ten bits of high-speed bus switching with low on-state resistance of the switch allowing connections to be made with minimal propagation delay. the device is organized as one 10-bit bus switch. the switches are controlled by independent active-low enable ( oe ) and active-high enable (oe) controls. 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, and oe should be tied to gnd. 2 11 23 a1 a10 oe sw sw b10 b1 22 13 oe 1 a b oe oe
2 industrial temperature range idt74cbtlv3862 low-voltage 10-bit bus switch with active high and low enables absolute maximum ratings (1) symbol description max. unit v cc supply voltage 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 range ?65 to +150 c 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 pin configuration function table (1) operating characteristics (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 note: 1. all unused control inputs of the device must be held at v cc or gnd to ensure proper device operation. a 10 b 9 a 9 b 8 gnd b 10 v cc oe oe a 1 b 1 a 2 b 2 a 3 b 3 a 4 b 4 a 5 b 5 a 6 b 6 a 7 b 7 a 8 11 14 10 15 12 13 24 1 223 322 421 520 619 718 817 9 16 ssop/ qsop/ tssop top view inputs oe oe function l l disconnect l h disconnect h l a port = b port h h disconnect
3 industrial temperature range idt74cbtlv3862 low-voltage 10-bit bus switch with active high and low enables dc electrical characteristics over operating range following conditions apply unless otherwise specified: operating condition: t a = ?40c to +85c notes: 1. typical values are at v cc = 3.3v, +25 c ambient. 2. the increase in supply current is attributable to each input that is at the specified voltage level rather than v cc or gnd. 3. this is measured by the voltage drop between the a and b terminals at the indicated current through the switch. symbol parameter test conditions min. typ. (1) 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 ? ? 1 a i oz data i/o v cc = 3.6v, v o = 0v or 3.6v switch disabled ? ? 5 a i off v cc = 0v, v i or v o = 0v or 3.6v ? ? 50 a i cc v cc = 3.6v, i o = 0, v i = v cc or gnd ? ? 10 a i cc (2) 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 (switch off) ? 6 ? pf 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 (3) 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 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 4.5 1 4.2 ns oe to a or b t dis output disable time 1 5 1 5 ns oe to a or b t en output enable time 1 4.5 1 4.2 ns oe to a or b t dis output disable time 1 5 1 6 ns oe to a or b 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 when driven by an ideal voltage source (zero output impededance). switching characteristics
4 industrial temperature range idt74cbtlv3862 low-voltage 10-bit bus switch with active high and low enables 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 propagation delay test circuits for all outputs enable and disable times note: 1. diagram shown for input control enable-low and input control disable-high. definitions: c l = load capacitance: includes jig and probe capacitance. r t = termination resistance: should be equal to z out of the pulse generator. 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 2ns. test switch t plz /t pzl v load t phz /t pzh gnd t pd open switch position 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
5 industrial temperature range idt74cbtlv3862 low-voltage 10-bit bus switch with active high and low enables ordering information idt xx cbtlv xxx xx package device type temp. range py pyg q qg pg pgg 74 shrink small outline package ssop - green quarter-size small outline package qsop - green thin shrink small outline package tssop - green low-voltage 10-bit bus switch ?40c to +85c 3862 corporate headquarters for sales: for tech support: 6024 silver creek valley road 800-345-7015 or 408-284-8200 logichelp@idt.com san jose, ca 95138 fax: 408-284-2775 www.idt.com
|
