1 idtqs3253 high-speed cmos quickswitch dual 4:1 mux/demux industrial temperature range february 2006 2011 integrated device technology, inc. dsc-5755/7 c idtqs3253 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 ? pin compatible with the 74f253, 74fct253, and 74fct253t ? zero propagation delay, zero ground bounce ? undershoot clamp diodes on all switch and control inputs ? ttl-compatible control inputs ? available in qsop and s1 packages applications: ? logic replacement ? video, audio, graphics switching, muxing ? hot-swapping, hot-docking ? voltage translation (5v to 3.3v) ? power conservation ? bus funneling quickswitch ? products high-speed cmos quickswitch dual 4:1 mux/demux description: the qs3253 is a high-speed cmos ttl-compatible dual 4:1 multi- plexer/demultiplexer with 3-state outputs. the qs3253 is function and pinout compatible version of the 74f253, 74fct253, and the 74als/as/ ls253 dual 4:1 multiplexers. the low on resistance of the qs3253 allows inputs to be connected to outputs without adding propagation delay and without generating additional ground bounce noise. mux/demux devices provide an order of magnitude faster speed than equivalent logic devices. the qs3253 is characterized for operation at -40c to +85c. s 0 y a i 0a i 1a y b s 1 ea eb i 2a i 3a i 0b i 1b i 2b i 3b
2 industrial temperature range idtqs3253 high-speed cmos quickswitch dual 4:1 mux/demux pin configuration qsop/ s1 top view 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. pins typ. max. (1) unit control inputs 4 5 pf quickswitch channels demux 5 7 pf (switch off) mux 14 16 capacitance (t a = +25c, f = 1mhz, v in = 0v, v out = 0v) note: 1. this parameter is guaranteed but not production tested. 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 ea s 1 i 3a i 2a i 1a i 0a y a gnd v cc eb s 0 i 3b i 2b i 1b i 0b y b function table (1) enable select outputs ea eb s 1 s 0 y a y b function h x x x hi-z x disconnected x h x x x hi-z disconnected lllli 0a i 0b s 1 - 0 = 0 ll l h i 1a i 1b s 1 - 0 = 1 ll h l i 2a i 2b s 1 - 0 = 2 ll h h i 3a i 3b s 1 - 0 = 3 note: 1. h = high voltage level l = low voltage level x = don?t care z = high-impedence pin description pin names i/o description i x x i data inputs s 0 - s 2 i select inputs ea , eb i enable input ya, yb o data output
3 idtqs3253 high-speed cmos quickswitch dual 4:1 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 idtqs3253 high-speed cmos quickswitch dual 4:1 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 3 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 ? 6.6 ns t pzh sx to y t pzl switch turn-on delay 0.5 ? 6 ns t pzh ex to y t plz switch turn-off delay (2) 0.5 ? 6 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 capacit ance. 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 idtqs3253 high-speed cmos quickswitch dual 4:1 mux/demux industrial temperature range ordering information qs xxxxx xx package device type quarter size outline package - green small outline ic - green qg s1g 3253 high speed cmos quickswitch dual 4:1 mux/demux 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 02/14/2011 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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