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target specification december 2005 1/13 13 this is preliminary information on a new product foreseen to be developed. details are subject to change without notice. rev. 2 STG3856 low voltage 1.0 ? max dual sp3t switch with break before make feature features high speed: ?t pd = 0.3ns (typ.) at v cc = 3.0v ?t pd = 0.4ns (typ.) at v cc = 2.3v ultra low power dissipation: ?i cc = 0.2 a (max.) at t a = 85c low ?on? resistance v in = 0v: ?r on = 1.0 ? (max. t a = 25oc) at v cc =4.3v ?r on = 1.5 ? (max. t a = 25oc) at v cc =3.0v ?r on = 1.8 ? (max. t a = 25oc) at v cc =2.3v wide operating voltage range: ?v cc (opr) = 1.65v to 4.3v single supply 4.3v tolerant and 1.8v compatible threshold on digital control input at v cc = 2.3 to 4.3v latch-up performance exceeds 300ma (jesd 17) esd performance (analog chan. vs. gnd): hbm >2kv (mil std 883 method 3015) order codes description the STG3856 is a high-speed cmos low voltage dual analog s.p.3.t. (single pole triple throw) switch or dual 3:1 multiplexer / demultiplexer switch fabricated in silicon gate c 2 mos technology. it is designed to operate from 1.65v to 4.3v, making this device ideal for portable applications. the device offers very low on-resistance (<1.0 ? ) at v cc = 4.3v. the disabling and enabling of switches are done by setting the 1in and 2in control pins. additional key features are fast switching speed, and ultra low power consumption. all inputs and outputs are equipped with protection circuits against static discharge, giving them esd immunity and transient excess voltage. qfn12l www.st.com part number temperature range package comments STG3856 ?40 c to +85 c qfn12l (2.2mm x 1.4mm) STG3856qtr
STG3856 2/13 contents 1 summary description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.1 pin connections and description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.2 truth table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.3 internal schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 1.4 input equivalent circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2 maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3 electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 3.1 dc electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 3.2 ac electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 3.3 analog switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 4 package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 5 revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
STG3856 1 summary description 3/13 1 summary description 1.1 pin connections and description 1.2 truth table figure 1. connection diagramn (top through view) table 1. pin description pin n symbol name and function 12, 10 1in, 2in controls 1,2,3, 9,8,7 1s1, 1s2, 1s3, 2s1, 2s2, 2s3 independent channels 4,6 d1, d2 common channels 11 v cc positive supply voltage 5 gnd ground (0v) table 2. truth table 1in 2in switch state l l high-impedance l h d1-1s1, d2-2s1 h l d1-1s2, d2-2s2 h h d1-1s3, d2-2s3 1s1 1s2 1s3 2s3 2s2 2s1 in 2 v cc in 1 d2 gnd d1 1 2 3 12 11 10 9 8 7 4 5 6
1 summary description STG3856 4/13 1.3 internal schematic 1.4 input equivalent circuit figure 2. internal schematic figure 3. input equivalent circuit
STG3856 2 maximum ratings 5/13 2 maximum ratings stressing the device above the rating listed in the ?absolute maximum ratings? table may cause permanent damage to the device. these are stress ratings only and operation of the device at these or any other conditions above those indicated in the operating sections of this specification is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. refer also to the stmicroelectronics sure program and other relevant quality documents. table 3. absolute maximum ratings symbol parameter value unit v cc supply voltage -0.5 to 5.5 v v i dc input voltage -0.5 to v cc + 0.5 v v ic dc control input voltage -0.5 to 5.5 v v o dc output voltage -0.5 to v cc + 0.5 v i ikc dc input diode current on control pin (v in < 0v) -50 ma i ik dc input diode current (v in < 0v) 50 ma i ok dc output diode current 20 ma i o dc output current 150 ma i op dc output current peak (pulse at 1ms, 10% duty cycle) 300 ma i cc or i gnd dc v cc or ground current 100 ma p d power dissipation at t a = 70oc (1) 1. derate above 70oc by 18.5mw/c mw t stg storage temperature -65 to 150 c t l lead temperature (10 sec) 300 c
3 electrical characteristics STG3856 6/13 3 electrical characteristics 3.1 dc electrical characteristics table 4. recommended operating conditions symbol parameter value unit v cc supply voltage (1) 1. truth table guaranteed: 1.2v to 4.3v 1.4 to 4.3 v v i input voltage 0 to v cc v v ic control input voltage 0 to v cc v v o output voltage 0 to v cc v t op operating temperature -55 to 125 c dt/dv input rise and fall time control input v cc =1.65v to 2.7v 0 to 20 ns/v v cc =3.0 to 4.3v 0 to 10 table 5. dc electrical characteristics symbol parameter test condition value unit v cc (v) t a = 25c -40 to 85c -55 to 125c min. typ. max. min. max. min. max. v ih high level input voltage 1.65-1.95 0.65v cc 0.65v cc 0.65v cc v 2.3 - 2.5 1.4 1.4 1.4 2.7 - 3.0 1.4 1.4 1.4 3.3 - 4.3 1.5 1.5 1.5 v il low level input voltage 1.65-1.95 0.40 0.40 0.40 v 2.3 - 2.5 0.50 0.50 0.50 2.7 - 3.0 0.50 0.50 0.50 3.3 - 4.3 0.50 0.50 0.50 r on switch on resistance 4.3 v s =0v to v cc i s =100ma 0.6 1.0 1.2 ? 3.0 1.3 1.5 1.8 2.7 1.5 1.8 2.2 2.3 2.0 2.2 2.6 1.8 2.5 3.0 3.6 1.65 3.3 4.0 4.8 ? r on on resistance match between channels 2.7 v s @ r on max i s =100ma 0.01 ?
STG3856 3 electrical characteristics 7/13 symbol parameter test condition value unit v cc (v) t a = 25c -40 to 85c -55 to 125c min. typ. max. min. max. min. max. r flat on resistance flatness (1)(2) 4.3 v s =0v to v cc i s =100ma ? 3.0 2.7 0.22 0.35 0.35 2.3 1.65 i off off state leakage current (nsn), (dn) 4.3 v s =0.3 or 4v 20 100 na i in input leakage current 0 - 4.3 v in =0 to 4.3v 0.1 1 a i cc quiescent supply current 1.65 - 4.3 v in =v cc or gnd 0.05 0.2 1 a i cclv quiescent supply current low voltage driving 4.3 v in1 , v in2 = 1.65v 37 50 100 a v in1 , v in2 = 1.80v 33 40 50 v in1 , v in2 = 2.60v 12 20 30 1. ? ron = max |msn-nsn|, where m = 1 and n = 2, n = 1..3 2. flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over the specified analog signal ranges. table 5. dc electrical characteristics
3 electrical characteristics STG3856 8/13 3.2 ac electrical characteristics table 6. ac electrical characteristics (c l = 35pf, r l = 50 ? , tr = tf 5ns) symbol parameter test condition value unit v cc (v) t a = 25c -40 to 85c -55 to 125c min. typ. max. min. max. min. max. t plh , t phl propagation delay 1.65-1.95 0.45 ns 2.3 - 2.7 0.40 3.0 - 3.3 0.30 3.6 - 4.3 0.30 t on turn-on time 1.65-1.95 v s =0.8v 56 ns 2.3-2.7 v s =1.5v 33 50 60 3.0-3.3 21 40 50 3.6-4.3 19 40 50 t off turn-off time 1.65-1.95 v s =0.8 24 ns 2.3-2.7 v s =1.5v 17 25 40 3.0-3.3 14 20 30 3.6-4.3 12 20 30 t d break before make time delay 1.65-1.95 v s =0.8 10 31 ns 2.3-2.7 v s =1.5v 10 22 40 50 3.0-3.3 10 18 30 40 3.6-4.3 10 7 25 35 q charge injection 1.65-1.95 c l =100pf r l =1mo v gen =0v r gen =0 ? 25 pc 2.3-2.7 35 3.0-3.3 40 3.6-4.3 55
STG3856 3 electrical characteristics 9/13 3.3 analog switch table 7. analog switch characteristics (c l = 5pf, r l = 50 ? , t a = 25c) symbol parameter test condition value unit v cc (v) t a = 25c -40 to 85c -55 to 125c min. typ. max. min. max. min. max. oirr off isolation (1) 1. off isolation = 20log 10 (v d /v s ), v d = output, v s = input at off switch 1.65-4.3 v s =1v rms f=100khz -82 db xtalk crosstalk 1.6-4.3 v s =1v rms f=100khz -84 db thd total harmonic distortion 2.3-4.3 r l =600 ? v in =2v pp f=20hz to 20khz 0.03 % bw -3db bandwidth 1.65-4.3 r l =50 ? 100 mhz c in control pin input capacitance 5 pf c sn(off) sn port off capacitance 3.3 f = 1mhz 23 c sn(on) sn port on capacitance 3.3 f = 1mhz 70 c d d port capacitance when switch is enabled 3.3 f = 1mhz 70
4 package mechanical data STG3856 10/13 4 package mechanical data in order to meet environmental requirements, st offers these devices in ecopack ? packages. these packages have a lead-free second level interconnect . the category of second level interconnect is marked on the package and on the inner box label, in compliance with jedec standard jesd97. the maximum ratings related to soldering conditions are also marked on the inner box label. ecopack is an st trademark. ecopack specifications are available at: www.st.com.
STG3856 4 package mechanical data 11/13 table 8. qfn12l (2.2mm x 1.4mm) mechanical data figure 4. qfn12l package dimensions dimensions ref millimeters inches min. typ. max. min. typ. max. a 0.50 0.55 0.60 0.019 0.021 0.023 a1 0 0.02 0.05 0 0.001 0.002 b 0.15 0.20 0.25 0.006 0.007 0.010 d 1.30 1.40 1.50 0.051 0.055 0.059 e 2.10 2.20 2.30 0.082 0.086 0.090 e 0.40 0.015 l 0.35 0.40 0.45 0.013 0.015 0.017 all dimensions are in millimeters
5 revision history STG3856 12/13 5 revision history date revision description of change 22-dec-2005 1 first draft 23-dec-2005 2 few changes
STG3856 5 revision history 13/13 i nformation furnished is believed to be accurate and reliable. however, stmicroelectronics assumes no responsibility for the con sequence s o f use of such information nor for any infringement of patents or other rights of third parties which may result from its use. n o license is grante d b y implication or otherwise under any patent or patent rights of stmicroelectronics. specifications mentioned in this publicatio n are subje ct t o change without notice. this publication supersedes and replaces all information previously supplied. stmicroelectronics produ cts are n ot a uthorized for use as critical components in life support devices or systems without express written approval of stmicroelectron ics. the st logo is a registered trademark of stmicroelectronics. all other names are the property of their respective owners ? 2005 stmicroelectronics - all rights reserved stmicroelectronics group of companies australia - belgium - brazil - canada - china - czech republic - finland - france - germany - hong kong - india - israel - ital y - japan - malaysia - malta - morocco - singapore - spain - sweden - switzerland - united kingdom - united states of america www.st.com

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