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this is information on a product in full production. october 2012 doc id 8640 rev 7 1/16 16 m74hc4851 single 8-channel analog mux/demux with injection current protection datasheet ? production data features low power dissipation ?i cc = 2 a (max.) at t a = 25 c injection current protection ?v out < 1 mv at v cc = 5 v, i in 1 ma ?r s 3.9 k ?on? resistance at t a = 25 c ? 215 typ. (v cc = 3.0 v) ? 160 typ. (v cc = 4.5 v) ? 150 typ. (v cc = 6 v) fast switching ?t pd = 8.6 ns (typ.) at t a = 25 c, v cc = 4.5 v wide operating supply voltage range ?v cc = 2 v to 6 v high noise immunity ?v nih = v nil = 28% v cc (min.) pin and function compatible with series 4051, 4851 latch-up performance exceeds 500 ma ? (jesd 17) esd performance ? hbm: 2000 v ? mm: 200 v ? cdm: 1000 v applications automotive computer consumer industrial description the m74hc4851 device is a single 8-channel analog multiplexer/demultiplexer manufactured with silicon gate c 2 mos technology. it features injection current effect control which makes the device particularly suited for use in automotive applications where voltages in excess of normal logic voltages are common. the injection current effect control allows signals at disabled input channels to exceed the supply voltage range or go down to ground without affecting the signal of the enabled analog channel. this eliminates the need for external diode- resistor networks typically used to keep the analog channel signals within the supply voltage range. so-16 tssop16 table 1. device summary order code temperature range package packaging marking m74hc4851yrm13tr (1) -40/+125 c so-16 (automotive grade) tape and reel 74hc4851y m74hc4851rm13tr -55/+125 c so-16 tape and reel 74hc4851 M74HC4851YTTR (1) -40/+125 c tssop16 (automotive grade) tape and reel hc4851y m74hc4851ttr -55/+125 c tssop16 tape and reel hc4851 1. qualification and characterization according to aec q100 and q003 or equivalent, advanced screening according to aec q001 and q002 or equivalent. www.st.com
pin connections m74hc4851 2/16 doc id 8640 rev 7 1 pin connections figure 1. pin connections and iec logic symbols table 2. pin descriptions pin number symbol name and function 3 com out/in common output/input 6 inh inhibit input 7 nc not connected 11, 10, 9 a, b, c select inputs 13, 14, 15, 12, 1, 5, 2, 4 0 to 7 independent input/outputs 8 gnd ground (0 v) 16 v cc positive supply voltage
m74hc4851 pin connections doc id 8640 rev 7 3/16 note: x: don?t care. figure 2. control input equivalent circuit figure 3. i/o equivalent circuit table 3. truth table input state on channel inhcba llll 0 lllh 1 llhl 2 llhh 3 lhl l 4 lhlh 5 lhhl 6 lhhh 7 hxxx none
pin connections m74hc4851 4/16 doc id 8640 rev 7 figure 4. functional diagram
m74hc4851 absolute maximum ratings and operating conditions doc id 8640 rev 7 5/16 2 absolute maximum ratings and operating conditions note: absolute maximum ratings are those values beyond which damage to the device may occur. functional operation under these conditions is not implied. table 4. absolute maximum ratings symbol parameter value unit v cc supply voltage -0.5 to +7 v v in control input voltage -0.5 to v cc + 0.5 v v i/o switch i/o voltage -0.5 to v cc + 0.5 v i ck control input diode current 25 ma i iok i/o diode current 25 ma i cc dc v cc or ground current 50 ma p d power dissipation so-16 500 (1) mw tssop16 450 (1) mw t stg storage temperature -65 to +150 c t l lead temperature (10 sec.) 300 c esd (jesd22) human body model (hbm) 2000 v machine model (mm) 200 v charged device model (cdm) 1000 v 1. power dissipation at 65 c. derating from 65 c to 125 c: so package -7 mw/c; tssop package -6.1 mw/c. table 5. recommended operating conditions symbol parameter value unit v cc supply voltage 2 to 6 v v i/o input output voltage 0 to v cc v v i/o static or dynamic voltage across switch (1) 0 to 1.2 v v in control input voltage 0 to v cc v t op operating temperature so-16, tssop16 -55 to +125 c so-16, tssop16 (automotive grade) -40 to +125 c t r , t f input rise and fall time (2) (channel select or enable inputs only) v cc = 2.0 v 0 to 1000 ns v cc = 3.0.v 0 to 800 v cc = 3.3 v 0 to 700 v cc = 4.5 v 0 to 500 v cc = 6.0 v 0 to 400 1. for voltage drops across the switch greater than 1.2 v (switch on), excessive v cc current may be drawn; i.e., the current out of the switch may contain both v cc and switch input components. the reliability of the device is unaffected unless the maximum ratings are exceeded. 2. v in from 30% to 70% v cc of channel selected or enable inputs.
absolute maximum ratings and operating conditions m74hc4851 6/16 doc id 8640 rev 7 table 6. dc specifications symbol parameter test condition value unit v cc (v) t a = 25 c up to 85 c up to 125 c min. typ. max. min. max. min. max. v ihc high level input voltage 2.0 1.5 1.5 1.5 v 3.0 2.1 2.1 2.1 3.0 2.3 2.3 2.3 4.5 3.15 3.15 3.15 6.0 4.2 4.2 4.2 v ilc low level input voltage 2.0 0.5 0.5 0.5 v 3.0 0.9 0.9 0.9 3.3 1.0 1.0 1.0 4.5 1.35 1.35 1.35 6.0 1.8 1.8 1.8 r on on resistance 2.0 i s = 2 ma v in = v ihc or v ilc v is = v cc to gnd 500 650 670 700 3.0 i s 2 ma 215 280 320 360 3.3 210 270 305 345 4.5 160 210 240 270 6.0 150 195 220 250 r on difference of on resistance between switches 2.0 i s = 2 ma v in = v ihc or v ilc v is = v cc /2 410 15 20 3.0 i s 2 ma 28 12 16 3.3 2 8 12 16 4.5 2 8 12 16 6.0 3 9 13 18 i off input/output leakage current (switch off) (any channel) 6.0 v in = v cc or gnd 0.1 0.5 1.0 a i off input/output leakage current (switch off) (common channel) 6.0 0.2 2 4 a i on switch input leakage current (switch on, output open) 6.0 v in = v cc or gnd 0.1 0.5 1 a
m74hc4851 absolute maximum ratings and operating conditions doc id 8640 rev 7 7/16 i in control input current 6.0 v in = v cc or gnd 0.1 0.1 1 a i cc quiescent supply current 6.0 v in = v cc or gnd v in(analog) = gnd 220 40 a table 6. dc specifications (continued) symbol parameter test condition value unit v cc (v) t a = 25 c up to 85 c up to 125 c min. typ. max. min. max. min. max. table 7. ac electrical characteristics (c l = 50 pf, input t r = t f = 6 ns) symbol parameter test condition value unit v cc (v) test circuit 1 t a = 25 c up to 85 c up to 125 c min. typ. max. min. max. min. max. t phl, t pl h propagation delay time, analog input to analog output 2.0 19.5 25 29 32 ns 3.0 12 15.5 17.5 19.5 3.3 11 14.5 16.5 18.5 4.5 8.6 11.5 12.5 13.5 6.0 8 10 11 12 t phl, t plh propagation delay time channel-select to analog output 2.0 23 30 35 40 ns 3.0 13.5 17.5 20 23 3.3 12.5 16.5 19 22 4.5 10 13 15 17 6.0 9.5 12.5 14.5 16.5 t phz , t pzh t plz, t pzl enable disable time, enable or channel-select to analog output 2.0 95 105 115 ns 3.0 90 100 110 3.3 85 95 105 4.5 80 90 100 6.0 78 80 80 c in input capacitance (digital pins) 3.5 10 10 10 pf c in input capacitance (switches off, any single analog pins) 6.7 15 15 15 pf
absolute maximum ratings and operating conditions m74hc4851 8/16 doc id 8640 rev 7 c in input capacitance (switches off, any common analog pins) 22 40 40 40 pf c pd power dissipation capacitance (1) 3.3 24 pf 5.0 28 1. c pd is defined as the value of the ic?s internal equivalent capacitance which is calculated from the operating current consumption without load (refer to figure 5 ). the average operating current can be obtained by the following equation: i cc (opr) = c pd x v cc x f in + i cc /8. table 7. ac electrical characteristics (c l = 50 pf, input t r = t f = 6 ns) (continued) symbol parameter test condition value unit v cc (v) test circuit 1 t a = 25 c up to 85 c up to 125 c min. typ. max. min. max. min. max. table 8. injection current coupling specification (t a = -55c to +125c) symbol parameter test condition value unit v cc (v) test circuit 2 typ. (1) max. v out shift of output voltage of enabled analog channel 3.3 i in 1 ma, r s 3.9 k 0.050 1.0 mv 5.0 0.100 1.0 3.3 i in 10 ma, r s 3.9 k 0.345 5.0 5.0 0.067 5.0 3.3 i in 1 ma, r s 20 k 0.050 2.0 5.0 0.110 2.0 3.3 i in 10 ma, r s 20 k 0.050 20 5.0 0.024 20 1. typical values are measured at t a = 25 c. they are calculated as the difference from v out without injection current and v out with injection current. i in = total current injected into any other disabled channels, one at time.
m74hc4851 absolute maximum ratings and operating conditions doc id 8640 rev 7 9/16 figure 5. test circuit 1 note: c l = 50 pf or equivalent (includes jig and probe capacitance). r l = r1 = 10 k or equivalent. r t = z out of pulse generator (typically 50 ). figure 6. test circuit 2 table 9. test circuit 1 - switch configuration table test switch t plh , t phl open t pzl , t plz v cc t pzh , t phz gnd
absolute maximum ratings and operating conditions m74hc4851 10/16 doc id 8640 rev 7 figure 7. enable and disable time figure 8. selection path to output propagation delays
m74hc4851 absolute maximum ratings and operating conditions doc id 8640 rev 7 11/16 figure 9. input (com, 0 to 7 in) to output (0 to 7 out, com) propagation delays figure 10. channel resistance r on figure 11. i cc (opr)
package information m74hc4851 12/16 doc id 8640 rev 7 3 package information in order to meet environmental requirements, st offers these devices in different grades of ecopack ? packages, depending on their level of environmental compliance. ecopack specifications, grade definitions and product status are available at: www.st.com . ecopack is an st trademark.
m74hc4851 package information doc id 8640 rev 7 13/16 3.1 so-16 package information figure 12. so-16 package outline table 10. so-16 mechanical data symbol dimensions millimeters inches min. typ. max. min. typ. max. a 1.75 0.069 a1 0.10 0.25 0.004 0.010 a2 1.25 0.049 b 0.31 0.51 0.012 0.020 c 0.17 0.25 0.007 0.010 d 9.80 9.90 10.00 0.386 0.390 0.394 e 5.80 6.00 6.20 0.228 0.236 0.244 e1 3.80 3.90 4.00 0.150 0.154 0.157 e 1.27 0.050 h 0.25 0.50 0.010 0.020 l 0.40 1.27 0.016 0.050 k0 8 ccc 0.10 0.004
package information m74hc4851 14/16 doc id 8640 rev 7 3.2 tssop16 package information figure 13. tssop16 package outline table 11. tssop16 mechanical data symbol dimensions millimeters inches min. typ. max. min. typ. max. a 1.20 0.047 a1 0.05 0.15 0.002 0.006 a2 0.80 1.00 1.05 0.031 0.039 0.041 b 0.19 0.30 0.007 0.012 c 0.09 0.20 0.004 0.008 d 4.90 5.00 5.10 0.193 0.197 0.201 e 6.20 6.40 6.60 0.244 0.252 0.260 e1 4.30 4.40 4.50 0.169 0.173 0.177 e 0.65 0.0256 k0 80 8 l 0.45 0.60 0.75 0.018 0.024 0.030 l1 1.00 0.039 aaa 0.10 0.004
m74hc4851 revision history doc id 8640 rev 7 15/16 4 revision history table 12. document revision history date revision changes 05-apr-2012 4 ? document reformatted. ? added esd charged device model feature on cover page. ? added esd values to table 4: absolute maximum ratings . ? modified chapter 3: package information . ? modified chapter 4: ordering information . 11-may-2012 5 ? added automotive-grade part number m74hc4851yrm13tr to table 12.: order codes . ? added table 1.: device summary and modified description text on coverpage. 15-jun-2012 6 ? updated table 1: device summary and table 12: order codes . ? corrected on resistance values in features on page 1 ? updated t op in table 5: recommended operating conditions ? added footnote 1 to table 1: device summary 26-oct-2012 7 updated esd values in features . updated ta b l e 1 (added packaging and marking, updated note 1. ) removed table 12: order codes ( section 4: ordering information ). minor corrections throughout document.
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