1 idtqs33x257 high-speed cmos quickswitch 24:12 mux/demux industrial temperature range august 2012 2012 integrated device technology, inc. dsc-5763/3 c idtqs33x257 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 ? bidirectional signal flow ? 24:12 mux/demux switches connect inputs to outputs ? individual controls for each bank ? zero propagation delay, zero ground bounce ? undershoot clamp diodes on all switch and control inputs ? ttl-compatible control inputs ? available in 48-pin qvsop package applications: ? logic replacement ? video, audio, graphics switching, muxing ? hot-swapping, hot-docking ? voltage translation (5v to 3.3v) ? bus funneling quickswitch ? products high-speed cmos quickswitch 24:12 mux/demux s 0 e 0 y a i0 a i1 a i0 b i1 b i0 c i1 c i0 d i1 d y b y c y d s 1 e 1 y e i0 e i1 e i0 f i1 f i0 g i1 g i0 h i1 h y f y g y h s 2 e 2 y i i0 i i1 i i0 j i1 j i0 k i1 k i0 l i1 l y j y k y l description: the qs33x257 is a high-speed cmos ttl-compatible 24:12 multi- plexer/demultiplexer. the qs33x257 is functionally compatible to three of the quickswitch version of the 74f257, 74fct257, and the 74als/as/ ls257 quad 2:1 multiplexers. the low on resistance of the qs33x257 allows inputs to be connected to outputs without adding propagation delay and without generating additional ground bounce noise. this part will be used in wide bus multiplexing where board space is at a premium. mux/demux devices provide an order of magnitude faster speed than equivalent logic devices. the qs33x257 is characterized for operation at -40c to +85c.
2 industrial temperature range idtqs33x257 high-speed cmos quickswitch 24:12 mux/demux pin configuration 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 max. sink current/pin 120 ma p max maximum power dissipation 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 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 4 5 pf quickswitch channels demux 5 7 pf (switch off) mux 9 10 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 v cc e0 i0 d i1 d y d i0 c i1 c y c e1 i0 h i1 h y h i0 g i1 g y g e2 i0 l i1 l y l i0 k i1 k y k v cc v cc 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 s 0 i0 a i1 a y a i0 b i1 b y b gnd s 1 i0 e i1 e y e i0 f i1 f y f gnd s 2 i0 i i1 i y i i0 j i1 j y j gnd note: 1. h = high voltage level l = low voltage level x = don't care z = high-impedance function table (1) enable outputs ex sx y a y b y c y d function h x z z z z disable lli 0a i 0b i 0c i 0x select 0 lhi 1a i 1b i 1c i 1x select 1 pin description pin names i/o description i x x i/o data inputs s x i select input ex i/o enable input y x i/o data outputs
3 idtqs33x257 high-speed cmos quickswitch 24:12 mux/demux industrial temperature range r on (ohms) v in (volts) typical on resistance vs v in at v cc = 5v symbol par ameter 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 ?? 1 a i oz off-state output current (hi-z) 0v v out v cc ?? 1 a r on switch on resistance v cc = min., v in = 0v, i on = 30ma ? 5 7 v cc = min., v in = 2.4v, i on =15ma ? 10 15 v p pass voltage (2) v in = 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. 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 idtqs33x257 high-speed cmos quickswitch 24:12 mux/demux 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 9 a i cc power supply current per control input high (2) v cc = max., v in = 3.4v, f = 0 1.5 ma i ccd dynamic power supply current per mhz (3) v cc = max., i and y 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). i and y 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 i and y 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 ix to y t pzl switch turn-on delay 0.5 ? 5.2 ns t pzh sx to y t plz switch turn-off delay 0.5 ? 4.8 ns t phz ex to y t plz switch turn-off delay (2) 0.5 ? 5 ns t phz ex to y, sx to y 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 idtqs33x257 high-speed cmos quickswitch 24:12 mux/demux industrial temperature range ordering information qs xxxxx xx package device type blank industrial (-40c to +85c) qvsop - green q1g 33x257 high speed cmos quickswitch 24:12 mux/demux 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 10/01/08 pg. 5 updated the ordering information by removing the "idt" notation. 08/13/12 pg. 5 updated the ordering information by removing non rohs part and by addingtape and reel information.
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