1 industrial temperature range idtqs32xvh2245 2.5v / 3.3v 16-bit high bandwidth bus switch march 2003 2003 integrated device technology, inc. dsc-5777/11 c industrial temperature range description: the qs32xvh2245 hotswitch is a high bandwidth, 16-bit bus switch. the qs32xvh2245, with 25 on resistance and 1.35ns propagation delay, is ideal for line matching and low noise environments. the switches can be turned on under the control of the lvttl-compatible output enable ( oex ) signal for bidirectional data flow with no added delay or ground bounce. in the on state, the switches can pass signals up to 5v. in the off state, the switches offer very high impedence at the terminals. the combination of small propagation delay, high off impedance, and over-voltage tolerance makes the qs32xvh2245 ideal for hot-swapping applications. the qs32xvh2245 is characterized for operation from -40 c to +85 c. the idt logo is a registered trademark of integrated device technology, inc. applications: ? hot-swapping ? low distortion analog switch ? replaces mechanical relay ? atm 25/155 switching features: ? n channel fet switches with no parasitic diode to v cc ? isolation under power-off conditions ? no dc path to v cc or gnd ? 5v tolerant in off and on state ? 5v tolerant i/os ? flat r on characteristics over operating range ? rail-to-rail switching 0 - 5v ? bidirectional dataflow with near-zero delay: no added ground bounce ? excellent r on matching between channels ?v cc operation: 2.3v to 3.6v ? high bandwidth ? lvttl-compatible control inputs ? undershoot clamp diodes on all switch and control inputs ? low i/o capacitance, 4pf typical ?25 resistors for low noise and line matching ? available in 40-pin qvsop package idtqs32xvh2245 quickswitch ? products 2.5v / 3.3v 16-bit high bandwidth bus switch functional block diagram b 0 oe 1 a 0 b 1 a 1 b 2 a 2 b 3 a 3 b 4 a 4 b 5 a 5 b 6 a 6 b 7 a 7 b 8 oe 2 a 8 b 9 a 9 b 10 a 10 b 11 a 11 b 12 a 12 b 13 a 13 b 14 a 14 b 15 a 15
2 industrial temperature range idtqs32xvh2245 2.5v / 3.3v 16-bit high bandwidth bus switch pin configuration symbol description max unit v term (2) supplyvoltage to ground ?0.5 to +4.6 v v term (3) dc switch voltage v s ?0.5 to +5.5 v v term (3) dc input voltage v in ?0.5 to +5.5 v v ac ac input voltage (pulse width 20ns) ?3 v i out dc output current (max. sink current/pin) 120 ma 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 . symbol parameter (1) typ. max. unit c in control inputs 3 5 pf c i/o quickswitch channels (switch off) 4 6 pf c i/o quickswitch channels (switch on) 8 12 pf capacitance (t a = +25c, f = 1mhz, v in = 0v, v out = 0v) note: 1. h = high voltage level l = low voltage level oex function h disconnected l connect (ax = bx) function table (1) note: 1. this parameter is guaranteed but not production tested. pin names description oex output enable a x data i/os b x data i/os pin description qvsop top view 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 nc a 0 a 1 a 2 a 3 a 4 a 5 a 6 a 7 gnd nc a 8 a 9 a 10 a 11 a 12 a 13 a 14 a 15 gnd oe1 b 0 b 1 b 2 b 3 b 4 b 5 b 6 b 7 v cc oe2 b 8 b 9 b 10 b 11 b 12 b 13 b 14 b 15 v cc
3 industrial temperature range idtqs32xvh2245 2.5v / 3.3v 16-bit high bandwidth bus switch typical on resistance vs v in at v cc = 3.3v 35 12 34 5 30 25 20 15 10 5 0 0 40 0.5 1.5 2.5 3.5 4.5 r on (ohms) v in (volts) symbol parameter test conditions min. typ. (1) max. unit v ih input high voltage guaranteed logic high v cc = 2.3v to 2.7v 1.7 ? ? v for control inputs v cc = 2.7v to 3.6v 2 ? ? v il input low voltage guaranteed logic low v cc = 2.3v to 2.7v ? ? 0.7 v for control inputs v cc = 2.7v to 3.6v ? ? 0.8 i in input leakage current (control inputs) 0v v in v cc ??1a i oz off-state current (hi-z) 0v v out 5v, switches off ? ? 1 a i off data input/output power off leakage v in or v out 0v to 5v, v cc = 0v ? ? 1 a v cc = 2.3v v in = 0v i on = 30ma 18 27 39 r on switch on resistance typical at v cc = 2.5v v in = 1.7v i on = 15ma 18 28 41 v cc = 3v v in = 0v i on = 30ma 18 25 38 v in = 2.4v i on = 15ma 18 26 40 dc electrical characteristics over operating range following conditions apply unless otherwise specified: industrial: t a = ?40c to +85c, v cc = 3.3v 0.3v note: 1. typical values are at v cc = 3.3v and t a = 25c.
4 industrial temperature range idtqs32xvh2245 2.5v / 3.3v 16-bit high bandwidth bus switch typical i ccd vs enable frequency curve at v cc = 3.3v i ccd (ma) enable frequency (mhz) notes: 1. for conditions shown as min. or max., use the appropriate values specified under dc electrical characteristics. 2. per input driven at the specified level. a and b pins do not contribute to icc. 3. this parameter is guaranteed but not tested. 4. this parameter represents the current required to switch internal capacitance at the specified frequency. the a and b inputs do not contribute to the dynamic power supply current. this parameter is guaranteed but not production tested. power supply characteristics symbol parameter test conditions (1) min. typ. max. unit i ccq quiescent power supply current v cc = max., v in = gnd or v cc , f = 0 ? 2 6 ma i cc power supply current (2,3) per input high v cc = max., v in = 3v, f = 0 per control input ? ? 30 a i ccd dynamic power supply current per output v cc = 3.3v, a and b pins open, control inputs see typical i ccd vs enable frequency graph below enable control input (4) toggling @ 50% duty cycle 0 2 4 6 8 10 12 0 2 4 6 8 10 12 14 16 18 20
5 industrial temperature range idtqs32xvh2245 2.5v / 3.3v 16-bit high bandwidth bus switch switching characteristics over operating range t a = -40c to +85c v cc = 2.5 0.2v (1) v cc = 3.3 0.3v (1) symbol parameter min . (4) max. min . (4) max. unit t plh data propagation delay (2,3) ? 0.9 ? 1.35 ns t phl ax to/from bx t pzl switch turn-on delay 1.5 9 1.5 8 ns t pzh oex to ax/bx t plz switch turn-off delay 1.5 7.5 1.5 7.5 ns t phz oex to ax/bx f oex operating frequency - enable (2,5) ? 10 ? 20 mhz notes: 1. see test conditions under test circuits and waveforms. 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 1.35ns 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. 4. minimums are guaranteed but not production tested. 5. maximum toggle frequency for oex control input (pass voltage > v cc , v in = 5v, r load 1m , no c load ).
6 industrial temperature range idtqs32xvh2245 2.5v / 3.3v 16-bit high bandwidth bus switch charge pump oe vcc = 3.3v 0 to +5v nfet +6.5v driver 0 to +5v single hot switch card i/o on card logic connector qs3vhxxx cpu ram bus card i/o on card logic connector qs3vhxxx pluggable card/ live system zero down time system rail-to-rail switching some applications for hotswitch products hot-swapping
7 industrial temperature range idtqs32xvh2245 2.5v / 3.3v 16-bit high bandwidth bus switch test circuits and waveforms open v load gnd v cc pulse generator d.u.t. 500 500 c l r t v in v out (1, 2) same phase input transition opposite phase input transition 0v 0v v oh v ol t plh t phl t phl t plh output v ih v t v t v ih v t control input t plz 0v output normally low t pzh 0v switch closed output normally high enable disable switch open t phz 0v v ol + v lz v oh v t v t t pzl v load/2 v load/2 v ih v t v ol v oh - v hz test conditions symbol v cc (1) = 3.3v 0.3v v cc (2) = 2.5v 0.2v unit v load 6 2 x vcc v v ih 3 vcc v v t 1.5 v cc /2 v v lz 300 150 mv v hz 300 150 mv c l 50 30 pf note: 1. diagram shown for input control enable-low and input control disable-high. notes: 1. pulse generator for all pulses: rate 10mhz; t f 2.5ns; t r 2.5ns. 2. pulse generator for all pulses: rate 10mhz; t f 2ns; t r 2ns. definitions: c l = load capacitance: includes jig and probe capacitance. r t = termination resistance: should be equal to z out of the pulse generator. switch position test switch t plz / t pzl v load t phz/ t pzh gnd t pd open propagation delay test circuits for all outputs enable and disable times
8 industrial temperature range idtqs32xvh2245 2.5v / 3.3v 16-bit high bandwidth bus switch ordering information idtqs xxxxx xx package device type 32xvh2245 2.5v / 3.3v 16-bit high bandwidth bus switch q2 q2g 40-pin qvsop 40-pin qvsop - green 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
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