1 industrial temperature range idtqs32x2384 high-speed cmos 20-bit bus switch february 2011 2011 integrated device technology, inc. dsc-5725/4 c industrial temperature range functional block diagram the idt logo is a registered trademark of integrated device technology, inc. applications: ? hot-swapping, hot-docking ? voltage translation (5v to 3.3v) ? power conservation ? capacitance reduction and isolation ? bus isolation ? clock gating features: ? enhanced n channel fet with no inherent diode to v cc ? low propagation delay and zero ground bounce ?25 resistors for low noise ? undershoot clamp diodes on all switch and control inputs ? four enables control five bits each ? ttl-compatible input and output levels ? available in 48-pin qvsop package idtqs32x2384 quickswitch ? products high-speed cmos 20-bit bus switch b 4 bec bea b 0 a 4 a 0 b 9 b 5 a 9 a 5 b 14 beb bed b 10 a 14 a 10 b 19 b 15 a 19 a 15 description: the qs32x2384 provides a set of twenty high-speed cmos ttl- compatible bus switches. the qs32x2384 also includes internal 25 series termination resistors to reduce reflection noise in high-speed applications. the bus enable ( be ) signals turn the switches on. four bus enable signals are provided, one for each of five bits of the 20-bit bus. the ?384 family of quickswitch products is ideal for switching wide digital buses, as well as hotplug buffering, and 5v to 3v conversion. the qs32x2384 is characterized for operation at -40c to +85c.
2 industrial temperature range idtqs32x2384 high-speed cmos 20-bit bus switch pin configuration symbol description max unit v term (2) supplyvoltage to ground ?0.5 to +7 v v term (3) dc switch voltage v s ?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 (max. sink current/pin) 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) notes: 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. v cc terminals. 3. all terminals except v cc . pins typ. max. (1) unit control inputs 3 5 pf quickswitch channels (switch off) 5 7 pf capacitance (t a = +25c, f = 1mhz, v in = 0v, v out = 0v) note: 1. this parameter is guaranteed but not production tested. note: 1. h = high voltage level l = low voltage level x = don't care z = high-impedence bea beb b 0 - b 4 b 15 - b 19 function h h z z disconnect lha 0 - a 4 z connect hl za 15 - a 19 connect lla 0 - a 4 a 15 - a 19 connect bec bed b 5 - b 9 b 10 - b 14 function h h z z disconnect lha 5 - a 9 z connect hl za 10 - a 14 connect lla 5 - a 9 a 10 - a 14 connect function table (1) qvsop top view pin names i/o description a 0 - a 19 i/o bus a b 0 - b 19 i/o bus b bea i enable, 0 - 4 beb i enable, 15 - 19 bec i enable, 5 - 9 bed i enable, 10 - 14 pin description 148 bea v cc 2 47 b 0 b 19 3 46 a 0 a 19 4 45 a 1 a 18 5 44 b 1 b 18 6 43 b 2 b 17 8 41 a 3 a 16 9 40 b 3 b 16 10 39 b 4 b 15 7 42 a 2 a 17 11 38 a 4 a 15 12 37 gnd beb 13 36 bec v cc 14 35 b 5 b 14 15 34 a 5 a 14 16 33 a 6 a 13 17 32 b 6 b 13 18 31 b 7 b 12 19 30 a 7 a 12 20 29 a 8 a 11 21 28 b 8 b 11 22 27 b 9 b 10 23 26 a 9 a 10 24 25 gnd bed
3 industrial temperature range idtqs32x2384 high-speed cmos 20-bit bus switch r on (ohms) v in (volts) symbol parameter test conditions min. typ. (1) max. unit v ih input high voltage guaranteed logic high for control pins 2 ? ? v v il input low voltage guaranteed logic low for control pins ? ? 0.8 v i in input leakage current (control inputs) 0v v in v cc ? 0.01 1 a i oz off-state current (hi-z) 0v v out v cc , switches off ? 0.01 1 a r on switch on resistance (2) v cc = min., v in = 0v, i on = 30ma 20 28 40 v cc = min., v in = 2.4v, i on = 15ma 20 35 48 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 and t a = 25c. 2. max value of r on is guaranteed but not production tested. 3. pass voltage is guaranteed but not production tested. typical on resistance vs v in at v cc = 5v 80 70 60 50 40 30 20 10 0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5
4 industrial temperature range idtqs32x2384 high-speed cmos 20-bit bus switch notes: 1. for conditions shown as min. or max., use the appropriate values specified under dc electrical characteristics. 2. per ttl driven input (v in = 3.4v, control inputs only). a and b 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 and b inputs generate no significant ac or dc currents as they transition. this parameter is guaranteed but not production tested. power supply characteristics symbol parameter test conditions (1) max. unit i ccq quiescent power supply current v cc = max., v in = gnd or v cc , f = 0 3 ma i cc power supply current per 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 and b pins open 0.25 ma/mhz control input toggling @ 50% duty cycle switching characteristics over operating range t a = -40c to +85c symbol parameter min. (1) typ. max. unit t plh data propagation delay (2,4) ?? 1.25 (3) ns t phl ax to bx, bx to ax t pzl switch turn-on delay 1.5 ? 7.5 ns t pzh bex to ax, bx t plz switch turn-off delay (2) 1.5 ? 5.5 ns t phz bex to ax, bx notes: 1. minimums are guaranteed but not production tested. 2. this parameter is guaranteed but not production tested. 3. the time constant for the switch alone is of the order of 1.25ns at c l = 50pf. 4. the bus switch contributes no propagation delay other than the rc delay of the on resistance of the switch and the load capac itance. since this time constant is much smaller than the rise and fall times of typical driving signals, it adds very little propagation delay to the system. propagation dela y of the bus switch, when used in a system, is determined by the driving circuit on the driving side of the switch and its interaction with the load on the driven side.
5 industrial temperature range idtqs32x2384 high-speed cmos 20-bit bus switch ordering information qs xxxxx xx package device type blank industrial (-40c to +85c) 48-pin qvsop - green q1g 32x2384 high speed cmos 20-bit bus switch x process x blank 8 tube or tray tape and reel 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 datasheet document history 02/16/2011 pg. 5 updated the ordering information by removing the "idt" notation, non rohs part and by adding tape and reel information.
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