1 idtQS3125 high-speed cmos quadruple bus switch with individual enables industrial temperature range december 1999 1999 integrated device technology, inc. dsc-5598/1 c industrial temperature range features: ? enhanced n channel fet with no inherent diode to vcc ? pin compatible with the 74?125 function ? zero propagation delay, zero added ground bounce ? undershoot clamp diodes on all switch and control inputs ? available in qsop and soic packages 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 (mass storage, work stations) ? logic replacement (data processing) ? clock gating ? bus isolation idtQS3125 quickswitch ? products high-speed cmos quadruple bus switch with individual active low enables description: the QS3125 provides a set of four high-speed low resistance cmos switches connecting inputs to outputs without propagation delay and without generating additional ground bounce noise. individual enables ( oe ) are used to turn on the switches. the QS3125 is ideal for signal and control switching since the device adds no noise, ground bounce, propagation delay, or significant power consumption to the system. the QS3125 can also be used for analog switching applications such as video. quickswitch devices provide an order of magnitude faster speed than conventional logic devices. the QS3125 is characterized for operation at -40c to +85c. 4oe 1 a 1 y 2 y 3 y 4 y 2 a 3 a 4 a 3oe 2oe 1oe functional block diagram free datasheet http://www.datasheetlist.com/
2 industrial temperature range idtQS3125 high-speed cmos quadruple bus switch with individual enables pin configuration qsop top view 1 2 3 4 5 6 7 8 9 10 11 12 16 15 14 13 nc 1oe 1 a 1 y 2oe 2 a 2 y gnd v cc 4oe 4 a 4 y 3oe 3 a 3 y nc soic top view 1 2 3 4 5 6 78 9 10 11 12 14 13 1oe 1 a 1 y 2oe 2 a 2 y gnd v cc 4oe 4 a 4 y 3oe 3 a 3 y symbol description max unit v term (2) supply voltage 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 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. h = high voltage level l = low voltage level x = don't care xoe xa xy function l h h connect l l l connect h x x disconnect function table (1) pins typ. max. (1) unit oe (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. pin names i/o description 1 a - 4 a i/o bus a 1 y - 4 y i/o bus y 1oe - 4oe i bus switch enable pin description 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 . free datasheet http://www.datasheetlist.com/
3 idtQS3125 high-speed cmos quadruple bus switch with individual enables industrial temperature range typical on resistance vs v in at v cc = 5v 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 inputs 2 ? ? v v il input low voltage guaranteed logic low for control inputs ? ? 0.8 v i in input leakage current (control inputs) 0v v in v cc ??1a i oz off-state current (hi-z) 0v v out v cc , switches off ? ? 1 a r on switch on resistance (2) 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 (3) 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 = 5v 5% notes: 1. typical values are at v cc = 5v and t a = 25c. 2. 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 free datasheet http://www.datasheetlist.com/
4 industrial temperature range idtQS3125 high-speed cmos quadruple bus switch with individual enables 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 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 a and y 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 a ? 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 y pins open, control inputs toggling @ 50% duty cycle 0.25 ma/mhz switching characteristics over operating range t a = -40c to +85c, v cc = 5v 5% c load = 50pf, r load = 500 ? unless otherwise noted. symbol parameter min . (1) typ. max. unit t plh data propagation delay (2) ?? 0.25 (3) ns t phl a to y t pzl switch turn-on delay 1.5 ? 6.5 ns t pzh oe to xa/xy t plz switch turn-off delay (2) 1.5 ? 5.5 ns t phz oe to xa/xy 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 at c l = 50pf. 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 delay of the bus switch, when used in a system, is determined by the driving circuit on the driving side o f the switch and its interaction with the load on the driven side. free datasheet http://www.datasheetlist.com/
5 idtQS3125 high-speed cmos quadruple bus switch with individual enables 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) quarter size outline package small outline ic q s1 3125 high speed cmos quadruple bus switch with individual active low enables x process free datasheet http://www.datasheetlist.com/
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