? semiconductor components industries, llc, 2001 may, 2001 rev. 3 676 publication order number: mc74lcx258/d mc74lcx258 low-voltage cmos quad 2-input multiplexer with 5 vtolerant inputs and outputs (3state, inverting) the mc74lcx258 is a high performance, quad 2input inverting multiplexer with 3state outputs operating from a 2.3 to 3.6 v supply. high impedance ttl compatible inputs significantly reduce current loading to input drivers while ttl compatible outputs offer improved switching noise performance. a v i specification of 5.5 v allows mc74lcx258 inputs to be safely driven from 5 v devices. four bits of data from two sources can be selected using the select input. the four outputs present the selected data in the inverted form. the outputs may be switched to a high impedance state by placing a logic high on the output enable (oe ) input. current drive capability is 24 ma at the outputs. ? designed for 2.3 to 3.6 v v cc operation ? 5 v tolerant interface capability with 5 v ttl logic ? supports live insertion and withdrawal ? i off specification guarantees high impedance when v cc = 0 v ? ttl compatible ? cmos compatible ? 24 ma balanced output sink and source capability ? near zero static supply current in all three logic states (10 m a) substantially reduces system power requirements ? latchup performance exceeds 500 ma ? esd performance: human body model >2000 v; machine model >200 v 2400 units/reel 2500 units/reel 48 units/rail 2400 units/reel 2000 units/reel http://onsemi.com so16 d suffix case 751b marking diagrams 1 16 lcx258 awlyww lcx 258 alyw tssop16 dt suffix case 948f ordering information eiaj so16 m suffix case 966 74lcx258 alyw device package shipping mc74lcx258d so16 48 units/rail mc74lcx258dr2 so16 mc74LCX258DTEL tssop16 mc74lcx258m eiaj so16 mc74lcx258mel eiaj so16 mc74lcx258dtr2 tssop16 a = assembly location l, wl = wafer lot y = year w, ww = work week 1 16 1 16
mc74lcx258 http://onsemi.com 677 figure 1. pinout: 16lead plastic package (top view) 15 16 14 13 12 11 10 2 1 34567 v cc 9 8 oe a3 b3 y3 a2 b2 y2 s a0 b0 y0 a1 b1 y1 gnd pin names pins function an source 0 data inputs bn source b data inputs oe enable input s select input yn outputs truth table inputs outputs output enable select y0y3 h x z l l a0a3 l h b0b3 x = don't care a0a3, b0b3 = the levels of the respective dataword inputs pin descriptions inputs a0a3 (pins 2, 5, 11, 14) nibble a inputs. the data present on these pins is transferred to the outputs when the select input is at a low level and the output enable input is at a low level. the data is presented to the outputs in inverted form for the lcx258. b0b3 (pins 3, 6, 10, 13) nibble b inputs. the data present on these pins is transferred to the outputs when the select input is at a high level and the output enable input is at a low level. the data is presented to the outputs in inverted form for the lcx258. outputs y0y3 (pins 4, 7, 9, 12) data outputs. the selected input nibble is presented at these outputs when the output enable input is at a low level. the data present on these pins is in its inverted form for the lcx258. for the output enable input at a high level, the outputs are at a high level for the lcx258. select (pin 1) nibble select. this input determines the data word to be transferred to the outputs. a low level on this input selects the a inputs and a high level selects the b inputs. control inputs output enable (pin 15) output enable input. a low level on this input allows the selected data to be presented at the outputs. a high level on this input sets all of the outputs to 3state off.
mc74lcx258 http://onsemi.com 678 figure 2. expanded logic diagram 2 a0 4 y0 7 y1 9 y2 12 y3 3 b0 5 a1 6 b1 11 a2 10 b2 14 a3 13 b3 15 output enable 1 select data output s nibble inputs
mc74lcx258 http://onsemi.com 679 maximum ratings symbol parameter value condition unit v cc dc supply voltage 0.5 to +7.0 v v i dc input voltage 0.5 v i +7.0 v v o dc output voltage 0.5 v o v cc + 0.5 note 1. v i ik dc input diode current 50 v i < gnd ma i ok dc output diode current 50 v o < gnd ma +50 v o > v cc ma i o dc output source/sink current 50 ma i cc dc supply current per supply pin 100 ma i gnd dc ground current per ground pin 100 ma t stg storage temperature range 65 to +150 c maximum ratings are those values beyond which damage to the device may occur. exposure to these conditions or conditions beyond those indicated may adversely affect device reliability. functional operation under absolute maximumrated conditions is not implied. functional operation should be restricted to the recommended operating conditions. 1. output in high or low state. i o absolute maximum rating must be observed. recommended operating conditions symbol parameter min typ max unit v cc supply voltage operating data retention only 2.0 1.5 2.3 to 3.3 3.6 3.6 v v i input voltage 0 5.5 v v o output voltage (high or low state) 0 v cc v i oh high level output current v cc = 3.0 v 3.6 v v cc = 2.7 v 3.0 v v cc = 2.3 v 2.7 v 24 12 8 ma i ol low level output current v cc = 3.0 v 3.6 v v cc = 2.7 v 3.0 v v cc = 2.3 v 2.7 v +24 +12 +8 ma t a operating freeair temperature 40 +85 c d t/ d v input transition rise or fall rate, v in from 0.8 v to 2.0 v, v cc = 3.0 v 0 10 ns/v
mc74lcx258 http://onsemi.com 680 dc electrical characteristics t a = 40 c to 85 c symbol characteristic condition min max unit v ih minimum high level input voltage 2.3 v v cc 2.7 v 1.7 v (note 2.) 2.7 v v cc 3.0 v 2.0 3.0 v v cc 3.6 v 2.0 v il maximum low level input voltage 2.3 v v cc 2.7 v 0.7 v (note 2.) 2.7 v v cc 3.0 v 0.8 3.0 v v cc 3.6 v 0.8 v oh minimum high level output voltage 2.3 v v cc 3.6 v; i oh = 100 a v cc 0.2 v v cc = 2.3 v; i oh = 8 ma 1.7 v cc = 2.7 v; i oh = 12 ma 2.2 v cc = 3.0 v; i oh = 18 ma 2.4 v cc = 3.0 v; i oh = 24 ma 2.2 v ol maximum low level output voltage 2.3 v v cc 3.6 v; i oh = 100 a 0.2 v v cc = 2.3 v; i oh = 8 ma 0.7 v cc = 2.7 v; i oh = 12 ma 0.4 v cc = 3.0 v; i oh = 16 ma 0.4 v cc = 3.0 v; i oh = 24 ma 0.55 i i input leakage current 2.3 v v cc 3.6 v; 0 v v i 5.5 v 5.0 a i cc quiescent supply current 2.3 v v cc 3.6 v; v i = v cc or gnd 10 a 2.3 v v cc 3.6 v; 3.6 v v i 5.5 v 10 d i cc increase in i cc per input 2.3 v v cc 3.6 v; v ih = v cc 0.6 v 500 a 2. these values of v i are used to test dc electrical characteristics only. ac electrical characteristics limits t a = 40 c to +85 c v cc = 3.0 v to 3.6 v v cc = 2.7 v v cc = 2.3 v to 2.7 v c l = 50 pf c l = 50 pf c l = 30pf symbol parameter min max min max min max unit t plh t phl propagation delay a to b to y 1.0 1.0 6.5 6.5 1.0 1.0 7.5 7.5 1.0 1.0 8.5 8.5 ns ns t plh t phl propagation delay s to y 1.0 1.0 7.0 7.0 1.0 1.0 8.0 8.0 1.0 1.0 9.0 9.0 ns ns t pzl t pzh propagation delay oe to y 1.0 1.0 7.0 7.0 1.0 1.0 8.0 8.0 1.0 1.0 9.0 9.0 ns ns t plz t phz propagation delay oe to y 1.0 1.0 6.0 6.0 1.0 1.0 7.0 7.0 1.0 1.0 8.0 8.0 ns ns t oshl t oslh outputtooutput skew 1.0 1.0 ns ns dynamic switching characteristics t a = 25 c symbol characteristic condition min typ max unit v olp dynamic low peak voltage (note 3.) v cc = 3.3 v, c l = 50 pf, v ih = 3.3 v, v il = 0 v 0.8 v v olv dynamic low valley voltage (note 3.) v cc = 3.3 v, c l = 50 pf, v ih = 3.3 v, v il = 0 v 0.8 v 3. number of outputs defined as ano. measured with an1o outputs switching from hightolow or lowtohigh. the remaining output is measured in the low state. capacitive characteristics symbol parameter condition typical unit c in input capacitance v cc = 3.3 v, v i = 0 v or v cc 7 pf c out output capacitance v cc = 3.3 v, v i = 0 v or v cc 8 pf c pd power dissipation capacitance 10 mhz, v cc = 3.3 v, v i = 0 v or v cc 25 pf
mc74lcx258 http://onsemi.com 681 figure 3. ac waveforms waveform 1 noninverting propagation delays t r = t f = 2.5 ns, 10% to 90%; f = 1 mhz; t w = 500 ns 2.7 v 0 v v oh v ol a, b, s yn t plh t phl 1.5v 1.5 v 1.5 v 1.5 v waveform 2 inverting propagation delays t r = t f = 2.5 ns, 10% to 90%; f = 1 mhz; t w = 500 ns 2.7 v 0 v v oh v ol s yn t plh t phl 1.5 v 1.5 v 1.5 v 1.5 v waveform 3 output enable and disable times t r = t f = 2.5 ns, 10% to 90%; f = 1 mhz; t w = 500 ns 2.7 v 0 v 0 v oe yn t pzh 3.0 v t phz t pzl t plz yn 1.5 v 1.5 v 1.5 v v cc v oh 0.3 v v ol + 0.3 v gnd 1.5 v
mc74lcx258 http://onsemi.com 682 open pulse generator r t dut v cc r l r 1 c l 6 v gnd test switch t plh , t phl open t pzl , t plz 6 v open collector/drain t plh and t phl 6 v t pzh , t phz gnd c l = 50 pf or equivalent (includes jig and probe capacitance) r l = r 1 = 500 w or equivalent r t = z out of pulse generator (typically 50 w ) figure 4. test circuit
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