1 idtqs4a105 high-performance cmos two-channel 4pst switch industrial temperature range april 2014 2014 integrated device technology, inc. dsc-5555/3 c industrial temperature range features: ? low on resistance: r ds ( on ) = 5 ? wide bandwidth: 1.3ghz (-3db point) ? crosstalk: 100db at 50khz, -70db at 5mhz, -50db at 30mhz ? off-isolation: -90db at 50khz, -60db at 5mhz, -55db at 30mhz ? single 5v supply ? bidirectional signal flow ? ttl-compatible control inputs ? ultra-low quiescent current: 3 a ? switch turn on time of 6.5ns ? available in qsop package the idt logo is a registered trademark of integrated device technology, inc. applications: ? high-speed video signal switching/routing ? hdtv-quality video signal routing ? audio signal switching/routing ? data acquisition ? ate systems ? telecomm routing ? token ring transceivers ? high-speed networking functional block diagram idtqs4a105 quickswitch ? products high-performance cmos two channel 4pst switch description: the qs4a105 is a high-performance cmos two-channel 4pst switch with 3-state outputs. the low on resistance of the qs4a105 allows inputs to be connected to outputs with low insertion loss and high bandwidth. the qs4a105, with 1.3ghz bandwidth, is ideal for high-performance video signal switching, audio signal switching, and telecomm routing applications. low power dissipation makes this device ideal for battery operated and remote instrumentation applications. the qs4a105 is offered in the qsop package which has several advantages over conventional packages such as pdip and soic, includ- ing: ? reduced signal delays due to denser component packaging on circuit boards ? reduced system noise due to less pin inductance the qs4a105 is characterized for operation at -40c to +85c. control logic a1 a2 a3 a4 b1 b2 b3 b4 c1 c2 c3 c4 d1 d2 d3 d4 e1 e2
2 industrial temperature range idtqs4a105 high-performance cmos two-channel 4pst switch pin configuration qsop top view 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 to +7 v ? analog input voltage 0 to +7 v v term (3) dc input voltage v in 0 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 0.7 w t stg storage temperature ?65 to +150 c absolute maximum ratings (1) pin names i/o description ax, bx i/o ports a, b cx, dx i/o ports c, d e 1 - e 2 i 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 . note: 1. h = high voltage level l = low voltage level e 1 e 2 ax, cx i/os bx, dx i/os h h disconnected disconnected l h ax = cx disconnected h l disconnected bx = dx l l ax = cx bx = dx function table (1) 1 2 3 4 5 6 7 8 9 10 e1 a1 d4 a2 d3 a3 d2 a4 d1 gnd v cc e2 c1 b4 c2 b3 c3 b2 c4 b1 20 19 18 17 16 15 14 13 12 11
3 idtqs4a105 high-performance cmos two-channel 4pst switch industrial temperature range dc electrical characteristics over operating range following conditions apply unless otherwise specified: industrial: t a = ?40c to +85c, v cc = 5v 5% power supply characteristics symbol parameter test conditions max. unit i cc supply current v cc = max., v in = gnd or v cc 3 a symbol parameter test conditions min. typ. (1) max. unit analog switch v in analog signal range (2) 0 ? vcc - 1 v r ds ( on ) drain-source on resistance (2,3) vcc = min., v in = 0v , i on = 30ma ? 5 7 vcc = min., v in = 2.4v , i on = 15ma ? 13 17 i c(off) channel off leakage current ax, bx = vcc or 0v, cx, dx = 0v or vcc, e = vcc ? 1 ? na i c(on) channel on leakage current ax = bx = cx = dx = 0v ? 1 ? na (each channel is turned on sequentially) digital control 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 dynamic characteristics t on( e ) enable turn-on time r l = 1k , c l = 100pf 0.5 ? 6.5 ns e to ax, bx, cx, or dx (see switching time) t off( e ) enable turn-off time r l = 1k , c l = 100pf 0.5 ? 6 ns e to ax, bx, cx, or dx (see switching time) t pd group delay (2,4a) r l = 1k , c l = 100pf ? ? 250 ps f 3db -3db bandwidth v in = 0 to 1v, 1vp-p, r l = 75 ? 1.3 ? ghz off-isolation v in = 0 to 1v, 1vp-p, r l = 75 , f = 5.5mhz ? -60 ? db x talk crosstalk v in = 1vp-p, r l = 75 , f = 5.5mhz ? -70 ? db c (off) mux off capacitance e = vcc, v in = v out = 0v ? 5 ? pf c (on) mux on capacitance e = 0v, v in = v out = 0v ? 10 ? pf q ci charge injection c l = 1000pf ? 1.5 ? pc notes: 1. typical values are at v cc = 5.0v, t a = 25c. 2. max value is guaranteed but not production tested. 3. measured by voltage drop between a and c pins or b and d pins at indicated current through the switch. on resistance is dete rmined by the lower of the voltages on the two (a, c, or b, d) pins. 4. the bus switch contributes no group delay other than the rc delay of the on resistance of the switch and load capacitance. g roup delay 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 dr iven side.
4 industrial temperature range idtqs4a105 high-performance cmos two-channel 4pst switch typical characteristics notes: 1. crosstalk = 20 log |v o /v s | 2. off-isolation = 20 log |v o /v s | notes: 1. crosstalk = 20 log |v o /v s | 2. off-isolation = 20 log |v o /v s | notes: 1. crosstalk = 20 log |v o /v s | 2. off-isolation = 20 log |v o /v s | note: 1. insertion loss = 20 log |v o /v s | off-isolation and crosstalk vs. frequency off-isolation and crosstalk vs. frequency off-isolation and crosstalk vs. frequency insertion loss vs. frequency 1k 10k 100k 1m 10m 100m 1g 10g frequency (hz) ( d b ) crosstalk off-isolation 180 150 120 90 60 30 0 v cc = 5v r l = 75 500m frequency (hz) ( d b ) crosstalk 600m 700m 400m 300m 200m 100m off-isolation 60 50 40 30 20 10 0 v cc = 5v r l = 75 50k frequency (hz) ( d b ) 60k 70k 40k 30k 20k 10k off-isolation crosstalk 160 140 120 100 80 60 40 v cc = 5v r l = 75 4 2 0 2 4 6 1k 10k 100k 1m 10m 100m 1g 10g frequency (hz) ( d b ) v cc = 5v r l = 75
5 idtqs4a105 high-performance cmos two-channel 4pst switch industrial temperature range typical characteristics (continued) insertion loss vs. frequency on-resistance vs. v in note: 1. insertion loss = 20 log |v o /v s | switching time test circuits 16 14 12 10 8 0.0 0.5 1.0 1.5 2.0 2.5 3.0 6 4 v in (volts) r d s ( o n ) - d r a i n s o u r c e o n - r e s i s t a n c e ( ) v cc = 4.75v 18 r on link 4 3 2 1 0 1 900m frequency (hz) ( d b ) 1g 600m 700m 800m 400m 500m v cc = 5v r l = 75 a1-a3 c1-c3 c4 gnd 5v 500 50 pf vcc 5v e2 e1 5v 50 v in qs4a105 control input output 3.0v 1.5v 0v t on(e) 0.3v t off(e) 0.3v output 3.0v 1.5v 0v control input a4 v out
6 industrial temperature range idtqs4a105 high-performance cmos two-channel 4pst switch insertion loss notes: 1. insertion loss = 20 log |v o /v s | 2. all unused pins are grounded. crosstalk notes: 1. crosstalk = 20 log |v o /v s | 2. all unused pins are grounded. off-isolation note: 1. off-isolation = 20 log |v o /v s | test circuits (continued) gnd vcc 5v e2 5v v s qs4a105 a4 e1 c4 v out r l 75 gnd 5v e2 5v qs4a105 b4 e1 c1 a1 vcc v s v out r l 75 gnd vcc 5v e1 e2 5v qs4a105 a1 c1 v s v out r l 75
7 idtqs4a105 high-performance cmos two-channel 4pst switch industrial temperature range ordering information qs xxxxx xx package device type x blank 8 tube or tray tape and reel quarter size outline package - qsop green qg 4a105 high performance cmos two channel 4pst switch 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 04/13/2014 pg. 7 updated the ordering information by removing non green package version and adding tape and reel information.
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