1 idtqs32xl383 high-speed low power 20-bit bus exchange switch industrial temperature range november 1999 1999 integrated device technology, inc. dsc-5575/1 c idtqs32xl383 industrial temperature range functional block diagram the idt logo is a registered trademark of integrated device technology, inc. features: ? enhanced n channel fet with no inherent diode to vcc ?5 ? ? ? ? ? bidirectional switches connect inputs to outputs ? zero propagation delay, zero ground bounce ? ultra low power with 0.2 a typical icc ? undershoot clamp diodes on all switch and control inputs ? bus exchange allows nibble swap ? available in 48-pin qvsop package applications: ? resource sharing ? crossbar switching ? bus isolation ? hot-docking ? voltage translation (5v to 3.3v) quickswitch ? products high-speed low power 20-bit bus exchange switch description: the qs32xl383 provides two sets of ten high-speed cmos ttl- compatible bus switches. the low on resistance of the qs32xl383 allows inputs to be connected to outputs without adding propagation delay and without generating additional ground bounce noise. the bus enable ( be ) signal turns the switches on. the bus exchange (bx) signal provides nibble swap of the ab and cd pairs of signals. this exchange configuration allows byte swapping of buses in systems. it can also be used as a 10-wide 2-to- 1 multiplexer and to create low delay barrel shifters, etc. the qs32xl383 is characterized for operation at -40c to +85c. a 4 c 4 d 4 b 4 bxa bea a 0 c 0 d 0 b 0 a 9 c 9 d 9 b 9 bxb beb a 5 c 5 d 5 b 5
2 industrial temperature range idtqs32xl383 high-speed low power 20-bit bus exchange switch pin configuration note: 1. h = high voltage level l = low voltage level x = don't care z = high-impedance function table (1) capacitance (t a = +25c, f = 1.0mh z , v in = 0v, v out = 0v) note: 1. this parameter is measured at characterization but not tested. pins typ. max. (1) unit control pins 3 5 pf quickswitch channels (switch off) 5 7 pf symbol description max unit v term (2) supply voltage to ground ?0.5 to +7 v v term (3) dc switch voltage vs ?0.5 to +7 v v term (3) dc input voltage v in ?0.5 to +7 v v ac ac input voltage (pulse width 20ns) ?3 v i out dc output current 120 ma p max maximum power dissipation (t a = 85c) 0.5 w 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. 2. vcc terminals. 3. all terminals except vcc. qvsop top view pin description pin names i/o description ax, bx i/o buses a, b cx, dx i/o buses c, d bex i bus switch enable bxx i bus exchange bea bxa a 0 - a 4 b 0 - b 4 function h x z z disconnect llc 0 - c 4 d 0 - d 4 connect lhd 0 - d 4 c 0 - c 4 exchange beb bxb a 5 - a 9 b 5 - b 9 function h x z z disconnect llc 5 - c 9 d 5 - d 9 connect lhd 5 - d 9 c 5 - c 9 exchange 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 bea c 0 a 0 b 0 d 0 c 1 a 1 b 1 d 1 c 2 a 2 gnd beb c 5 a 5 b 5 d 5 c 6 a 6 b 6 d 6 c 7 a 7 gnd d 4 b 4 a 4 c 4 d 3 b 3 a 3 c 3 d 2 b 2 bxa v cc d 9 b 9 a 9 c 9 d 8 b 8 a 8 c 8 d 7 b 7 bxb v cc
3 idtqs32xl383 high-speed low power 20-bit bus exchange switch industrial temperature range r on (ohms) v in (volts) typical on resistance vs v in at v cc = 5v symbol parameter test conditions min. typ. (1) max. unit v ih input high level guaranteed logic high for control pins 2 ? ? v v il input low level guaranteed logic low for control pins ? ? 0.8 v i in input leakagecurrent (control inputs) 0v v in v cc. control inputs ? 0.01 1a i oz off-state output current (hi-z) 0v v out v cc ? 0.01 1a r on switch on resistance (2) v cc = min., v in = 0v, i on = 30ma ? 6 8 ? v cc = min., v in = 2.4v, i on =15ma ? 12 17 v p pass voltage (3) v cc = 5v, i out = -5 a 3.7 4 4.2 v dc electrical characteristics over operating range following conditions apply unless otherwise specified: industrial: t a = ?40c to +85c, v cc = 5.0v 5% notes: 1. typical values are at v cc = 5.0v, t a = 25c. 2. max value of r on is guaranteed but not production tested. 3. pass voltage is guaranteed but not production tested. 16 14 12 10 8 6 4 2 0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5
4 industrial temperature range idtqs32xl383 high-speed low power 20-bit bus exchange switch power supply characteristics symbol parameter test conditions (1) max. unit i ccq quiescent power supply current v cc = max., v in = gnd or vcc, f = 0 6 a ? i cc power supply current per control input high (2) v cc = max., v in = 3.4v, f = 0 2.5 ma i ccd dynamic power supply current per mhz (3) v cc = max., a - d pins open 0.25 ma/mhz control inputs toggling at 50% duty cycle notes: 1. for conditions shown as min. or max., use the appropriate values specified under dc electrical characteristics. 2. per tll driven input (v in = 3.4v, control inputs only). a - d pins do not contribute to ? icc. 3. this current applies to the control inputs only and represents the current required to switch internal capacitance at the spe cified frequency. the a - d inputs generate no significant ac or dc currents as they transition. this parameter is guaranteed but not production tested. switching characteristics over operating range t a = -40c to +85c, v cc = 5.0v 5%; c load = 50pf, r load = 500 ? unless otherwise noted. symbol parameter min. (1) typ. max. unit t plh data propagation delay (2,3) ? ? 0.25 ns t phl axbx to cxdx, cxdx to axbx t pzl switch turn-on delay 1.5 ? 6.5 ns t pzh be to ax, bx, cx, dx t plz switch turn-off delay (2) 1.5 ? 5.5 ns t phz be to ax, bx, cx, dx t bx switch multiplex delay (2) 1.5 ? 6.5 ns bx to ax, bx, cx, dx notes: 1. minimums are guaranteed but not production tested. 2. this parameter is guaranteed but not production tested. 3. the bus switch contributes no propagation delay other than the rc delay of the on resistance of the switch and the load capac itance. the time constant for the switch alone is of the order of 0.25ns for c l = 50pf. since this time constant is much smaller than the rise and fall times of typical driving signals, it adds very littl e propagation delay to the system. propagation delay of the bus switch, when used in a system, is determined by the driving circuit on the driving si de of the switch and its interaction with the load on the driven side.
5 idtqs32xl383 high-speed low power 20-bit bus exchange switch industrial temperature range 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 idtqs xxxxx xx package device type blank industrial (-40c to +85c) 48-pin qvsop q1 32xl383 high speed low power 20-bit bus exchange switch x process
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