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this is information on a product in full production. december 2013 docid8021 rev 3 1/14 m74hc126 quad bus buffer (3-state) datasheet - production data features ? high-speed: t pd = 8 ns (typ.) at v cc = 6 v ? low power dissipation: i cc = 4 a (max.) at t a = 25 c ? high noise immunity: v nih = v nil = 28 % v cc (min) ? symmetrical output impedance: |i oh | = i ol = 6 ma (min.) ? balanced propagation delays: t plh ? t phl ? wide operating voltage range: v cc (opr) = 2 v to 6 v ? pin and function compatible with 74 series 126 ? esd performance ?cdm: 1 kv ?hbm: 2 kv ? mm: 200 v description the m74hc126 is a high-speed cmos quad buffer (3-state) fabricated with silicon gate c 2 mos technology. the device requires the 3-state control input, g, to be set high to place the output into high impedance state. all inputs are equipped with protection circuits against static discharge and transient excess voltage. so14 tssop14 table 1. device summary order code temp. range package packaging marking m74hc126rm13tr -55 c to 125 c s014 tape and reel 74hc126 M74HC126YRM13TR (1) 1. qualification and characterization acco rding to aec q100 and q003 or equivalen t, advanced screening according to aec q001 and q002 or equivalent. -40 c to 125 c so14 (automotive grade) 74hc126y m74hc126ttr -55 c to 125 c tssop14 hc126 m74hc126yttr (1) -40 c to 125 c tssop14 (automotive grade) hc126y www.st.com
contents m74hc126 2/14 docid8021 rev 3 contents 1 pin information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 4.1 so14 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11 4.2 tssop14 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 5 ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 6 revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
docid8021 rev 3 3/14 m74hc126 pin information 14 1 pin information figure 1. pin connecti on and ied logic symbols table 2. pin description pin no symbol name and function 1, 4, 10, 13 1g to 4g output enable input 2, 5, 9, 12 1a to 4a data inputs 3, 6, 8, 11 1y to 4y data outputs 7 gnd ground (0 v) 14 v cc positive supply voltage gams1212131410cb
functional description m74hc126 4/14 docid8021 rev 3 2 functional description figure 2. input and output equivalent circuit table 3. truth table ag y xl z lh l hh h output v cc v cc gnd gnd input
docid8021 rev 3 5/14 m74hc126 electrical characteristics 14 3 electrical characteristics ?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 i dc input voltage -0.5 to v cc + 0.5 v o dc output voltage i ik dc input diode current 20 ma i ok dc output diode current i o dc output current 35 i cc or i gnd dc v cc or ground current 70 p d power dissipation 500 (1) 1. 500 mw at 65 c; derate to 300 mw by 10 mw/c from 65 c to 85 c mw t stg storage temperature -65 to +150 c t l lead temperature (10 sec) 300 table 5. recommended operating conditions symbol parameter value unit v cc supply voltage 2 to 6 v v i input voltage 0 to v cc v o output voltage t op operating temperature -55 to 125 c t r , t f input rise and fall time v cc = 2.0 v 0 to 1000 ns v cc = 4.5v 0 to 500 v cc = 6.0 v 0 to 400
electrical characteristics m74hc126 6/14 docid8021 rev 3 table 6. dc specifications symbol parameter test condition value unit v cc (v) t a = 25 c -40 to 85 c -55 to 125 c min. typ. max. min. max. min. max. v ih high level input voltage 2.0 1.5 1.5 1.5 v 4.5 3.15 3.15 3.15 6.0 4.2 4.2 4.2 v il low level input voltage 2.0 0.5 0.5 0.5 v 4.5 1.35 1.35 1.35 6.0 1.8 1.8 1.8 v oh high level output voltage 2.0 i o = -20 a1.92.0 1.9 1.9 v 4.5 i o = -20 a4.44.5 4.4 4.4 6.0 i o = -20 a5.96.0 5.9 5.9 4.5 i o = -6.0 ma 4.18 4.31 4.13 4.10 6.0 i o = -7.8 ma 5.68 5.8 5.63 5.60 v ol low level output voltage 2.0 i o = 20 a 0.0 0.1 0.1 0.1 v 4.5 i o = 20 a 0.0 0.1 0.1 0.1 6.0 i o = 20 a 0.0 0.1 0.1 0.1 4.5 i o = 6.0 ma 0.17 0.26 0.33 0.40 6.0 i o = 7.8 ma 0.18 0.26 0.33 0.40 i i input leakage current 6.0 v i = v cc or gnd 0.1 1 1 a i oz high impedance output leakage current 6.0 v i = v ih or v il v o = v cc or gnd 0.5 5 10 a i cc quiescent supply current 6.0 v i = v cc or gnd 4 40 80 a
docid8021 rev 3 7/14 m74hc126 electrical characteristics 14 table 7. ac electrical characteristics (input t r = t f = 6 ns) symbol parameter test condition value unit v cc (v) c l (pf) t a = 25 c -40 to 85 c -55 to 125 c min. typ. max. min. max. min. max. t tlh , t thl output transition time 2.0 50 - 20 60 - 75 - 90 ns 4.5 6 12 15 18 6.0 5 10 13 15 t plh , t phl propagation delay time 2.0 50 36 75 95 110 ns 4.5 9 15 19 22 6.0 8 13 16 19 2.0 150 52 105 130 160 ns 4.5 13 21 26 32 6.0 11 18 22 27 t pzl , t pzh high impedance output enable time 2.0 50 r l = 1 k ? 36 75 95 110 ns 4.5 9 15 19 22 6.0 8 13 16 19 2.0 150 52 105 130 160 ns 4.5 13 21 26 32 6.0 11 18 22 27 t plz , t phz high impedance output disable time 2.0 50 r l = 1 k ? 48 80 100 120 ns 4.5 12 16 20 24 6.0 10 14 17 20 table 8. capacitive characteristics sym parameter test condition value unit v cc (v) t a = 25c -40 to 85 c -55 to 125 c min typ max min max min max c in input capacitance 5.0 - 510 - 10 - 10 pf c pd power dissipation capacitance (1) 35 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 test circuit). average operating current can be obtained by the following equation: i cc(opr) = c pd x v cc x f in + i cc /4(per buffer).
electrical characteristics m74hc126 8/14 docid8021 rev 3 figure 3. test circuit 1. legend: c l = 50 pf/150 pf or equivalent (includes jig and probe capacitance). r 1 = 1 k or equivalent. r t = z out of pulse generator (typically 50 ). table 9. propagation delay time configuration test switch t plh , t phl open t pzl , t plz v cc t pzh , t phz gnd gams1212131502cb
docid8021 rev 3 9/14 m74hc126 electrical characteristics 14 figure 4. waveform 1: propagation delay times (f = 1 mhz; 50 % duty cycle) figure 5. waveform 2: output enable and disable times (f = 1 mhz; 50 % duty cycle) gams1212131506cb gams1212131517cb
package information m74hc126 10/14 docid8021 rev 3 4 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 a nd product status are available at: www.st.com . ecopack ? is an st trademark.
docid8021 rev 3 11/14 m74hc126 package information 14 4.1 so14 package information figure 6. so14 package mechanical drawing table 10. so14 package mechanical data ref dimensions millimeters inches min. typ. max. min. typ. max. a 1.75 0.068 a1 0.1 0.2 0.003 0.007 a2 1.65 0.064 b 0.35 0.46 0.013 0.018 b1 0.19 0.25 0.007 0.010 c0.5 0.019 c1 45 45 d 8.55 8.75 0.336 0.344 e 5.8 6.2 0.228 0.244 e1.27 0.050 e3 7.62 0.300 f 3.8 4.0 0.149 0.157 g 4.6 5.3 0.181 0.208 l 0.5 1.27 0.019 0.050 m 0.68 0.026 s8 8 *$06&% / * f & d e ( 6 $ d h h e ' 0 )
package information m74hc126 12/14 docid8021 rev 3 4.2 tssop14 package information figure 7. tssop14 package mechanical drawing table 11. tssop14 package mechanical data ref dimensions millimeters inches min. typ. max. min. typ. max. a 1.2 0.047 a1 0.05 0.15 0.002 0.004 0.006 a2 0.8 1 1.05 0.031 0.039 0.041 b 0.19 0.30 0.007 0.012 c 0.09 0.20 0.004 0.0089 d 4.9 5 5.1 0.193 0.197 0.201 e 6.2 6.4 6.6 0.244 0.252 0.260 e1 4.3 4.4 4.48 0.169 0.173 0.176 e 0.65 0.0256 k0 8 0 8 l 0.45 0.60 0.75 0.018 0.024 0.030 f ( e $ $ ( ' 3,1,'(17,),&$7,21 $ / . h *$06&%
docid8021 rev 3 13/14 m74hc126 ordering information 14 5 ordering information 6 revision history table 12. order codes order code temp. range package packaging marking m74hc126rm13tr -55 c to 125 c s014 tape and reel 74hc126 M74HC126YRM13TR (1) 1. qualification and characterization acco rding to aec q100 and q003 or equivalen t, advanced screening according to aec q001 and q002 or equivalent. -40 c to 125 c so14 (automotive grade) 74hc126y m74hc126ttr -55 c to 125 c tssop14 hc126 m74hc126yttr (1) -40 c to 125 c tssop14 (automotive grade) hc126y table 13. document revision history date revision changes aug-2001 1 initial release. 13-dec-2013 3 removed dip14 package features : added esd information table 1: device summary : updated order codes, added automotive grade order codes, added temperature range and marking details. added section 5: ordering information .
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