View 74HC257N_1427091.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

1. general description the 74hc257; 74hct257 are high-speed si-g ate cmos devices and are pin compatible with low-power schottky ttl (lsttl). the 74hc257 and 74hct257 have four identical 2-input multiplexers with 3-state outputs, which select 4 bits of data from two source s and are controlled by a common data select input (s). the data inputs from source 0 (1i0 to 4i0) are selected when input s is low and the data inputs from source 1 (1i1 to 4i1) are selected when s is high. data appears at the outputs (1y to 4y) in true (non-inverting) form from the selected inputs. the 74hc257 and 74hct257 are the logic impl ementation of a 4-pole, 2-position switch, where the position of the switch is determined by the logic levels applied to s. the outputs are forced to a high-impedance off-state when oe is high. the logic equations for the outputs are: except for their non-inverting (true) outputs the 74hc257; 74hct257 are identical to the 74hc258. 2. features ? non-inverting data path ? 3-state outputs interface directly with system bus ? complies with jedec standard no. 7a ? esd protection: ? hbm jesd22-a114e exceeds 2 000 v ? mm jesd22-a115-a exceeds 200 v ? multiple package options ? specified from ? 40 c to +85 c and from ? 40 c to +125 c 74hc257; 74hct257 quad 2-input multiplexer; 3-state rev. 05 ? 13 january 2010 product data sheet 1y oe 1i1 s ? 1i0 ? s ? () ? = 2y oe 2i1 s ? 2i0 ? s ? () ? = 3y oe 3i1 s ? 3i0 ? s ? () ? = 4y oe 4i1 s ? 4i0 ? s ? () ? =
74hc_hct257_5 ? nxp b.v. 2010. all rights reserved. product data sheet rev. 05 ? 13 january 2010 2 of 17 nxp semiconductors 74hc257; 74hct257 quad 2-input multiplexer; 3-state 3. ordering information 4. functional diagram table 1. ordering information type number package temperature range name description version 74HC257N ? 40 c to +125 c dip16 plastic dual in-line package; 16 leads (300 mil) sot38-4 74hct257n 74hc257d ? 40 c to +125 c so16 plastic small outline package; 16 leads; body width 3.9 mm sot109-1 74hct257d 74hc257db ? 40 c to +125 c ssop16 plastic shrink small outline package; 16 leads; body width 5.3 mm sot338-1 74hct257db 74hc257pw ? 40 c to +125 c tssop16 plastic thin shrink small outline package; 16 leads; body width 4.4 mm sot403-1 74hct257pw fig 1. logic symbol fig 2. iec logic symbol mga835 s oe 1y 2y 3y 4y 2 3 5 6 11 10 14 13 15 1 4 7 9 12 1i 0 1i 1 2i 0 2i 1 3i 0 3i 1 4i 0 4i 1 001aad467 15 1 g1 1 mux 1 4 2 3 7 5 6 9 11 10 12 14 13 en
74hc_hct257_5 ? nxp b.v. 2010. all rights reserved. product data sheet rev. 05 ? 13 january 2010 3 of 17 nxp semiconductors 74hc257; 74hct257 quad 2-input multiplexer; 3-state fig 3. functional diagram mgr28 0 s 1 1i 0 2 1y 4 1i 1 3 selector 3-state multiplexer outputs 2i 0 5 2y 7 2i 1 6 3i 0 11 3y 9 3i 1 10 4i 0 14 4y 12 4i 1 13 oe 15 fig 4. logic diagram 001aad468 1y s oe 1i0 1i1 2i0 2i1 3i0 3i1 4i0 4i1 2y 3y 4y
74hc_hct257_5 ? nxp b.v. 2010. all rights reserved. product data sheet rev. 05 ? 13 january 2010 4 of 17 nxp semiconductors 74hc257; 74hct257 quad 2-input multiplexer; 3-state 5. pinning information 5.1 pinning 5.2 pin description 6. functional description 6.1 function table [1] h = high voltage level; l = low voltage level; x = don?t care; z = high-impedance off-state. fig 5. pin configuration dip1 6, so16, ssop16 and tssop16 74hc257 74hct257 s v cc 1i0 oe 1i1 4i0 1y 4i1 2i0 4y 2i1 3i0 2y 3i1 gnd 3y 001aad499 1 2 3 4 5 6 7 8 10 9 12 11 14 13 16 15 table 2. pin description symbol pin description s 1 common data select input 1i0 to 4i0 2, 5, 11, 14 data input from source 0 1i1 to 4i1 3, 6, 10, 13 data input from source 1 1y to 4y 4, 7, 9, 12 3-state multiplexer output gnd 8 ground (0 v) oe 15 3-state output enable input (active low) v cc 16 supply voltage table 3. function table [1] control input output oe s nl0 nl1 ny h x x x z l h x l l l h x h h l l l x l l l h x h
74hc_hct257_5 ? nxp b.v. 2010. all rights reserved. product data sheet rev. 05 ? 13 january 2010 5 of 17 nxp semiconductors 74hc257; 74hct257 quad 2-input multiplexer; 3-state 7. limiting values [1] for dip16 packages: above 70 c, p tot derates linearly with 12 mw/k. [2] for so16 packages: above 70 c, p tot derates linearly with 8 mw/k. [3] for ssop16 and tssop16 packages: above 60 c, p tot derates linearly with 5.5 mw/k. 8. recommended operating conditions table 4. limiting values in accordance with the absolute maximum rating system (iec 60134). voltages are referenced to gnd (ground = 0 v). symbol parameter conditions min max unit v cc supply voltage ? 0.5 +7 v i ik input clamping current v i < ? 0.5 v or v i > v cc + 0.5 v - 20 ma i ok output clamping current v o < ? 0.5 v or v o > v cc + 0.5 v - 20 ma i o output current v o = ? 0.5 v to v cc + 0.5 v - 35 ma i cc supply current - +70 ma i gnd ground current - ? 70 ma t stg storage temperature ? 65 +150 c p tot total power dissipation dip16 package [1] - 750 mw so16 package [2] - 500 mw ssop16 package [3] - 500 mw tssop16 package [3] - 500 mw table 5. recommended operating conditions symbol parameter conditions min typ max unit type 74hc257 v cc supply voltage 2.0 5.0 6.0 v v i input voltage 0 - v cc v v o output voltage 0 - v cc v t/ v input transition rise and fall rates v cc = 2.0 v - - 625 ns v cc = 4.5 v - 1.67 139 ns v cc = 6.0 v - - 83 ns t amb ambient temperature ? 40 - +125 c type 74hct257 v cc supply voltage 4.5 5.0 5.5 v v i input voltage 0 - v cc v v o output voltage 0 - v cc v t/ v input transition rise and fall rates v cc = 4.5 v - 1.67 139 ns t amb ambient temperature ? 40 - +125 c
74hc_hct257_5 ? nxp b.v. 2010. all rights reserved. product data sheet rev. 05 ? 13 january 2010 6 of 17 nxp semiconductors 74hc257; 74hct257 quad 2-input multiplexer; 3-state 9. static characteristics table 6. static characteristics at recommended operating conditions; vo ltages are referenced to gnd (ground = 0 v). symbol parameter conditions 25 c ? 40 c to +85 c ? 40 c to +125 c unit min typ max min max min max 74hc257 v ih high-level input voltage v cc = 2.0 v 1.5 1.2 - 1.5 - 1.5 - v v cc = 4.5 v 3.15 2.4 - 3.15 - 3.15 - v v cc = 6.0 v 4.2 3.2 - 4.2 - 4.2 - v v il low-level input voltage v cc = 2.0 v - 0.8 0.5 - 0.5 - 0.5 v v cc = 4.5 v - 2.1 1.35 - 1.35 - 1.35 v v cc = 6.0 v - 2.8 1.8 - 1.8 - 1.8 v v oh high-level output voltage v i = v ih or v il i o = ? 20 a; v cc = 2.0 v 1.9 2.0 - 1.9 - 1.9 - v i o = ? 20 a; v cc = 4.5 v 4.4 4.5 - 4.4 - 4.4 - v i o = ? 20 a; v cc = 6.0 v 5.9 6.0 - 5.9 - 5.9 - v i o = ? 6.0 ma; v cc = 4.5 v 3.98 4.32 - 3.84 - 3.7 - v i o = ? 7.8 ma; v cc = 6.0 v 5.48 5.81 - 5.34 - 5.2 - v v ol low-level output voltage v i = v ih or v il i o = 20 a; v cc = 2.0 v - 0 0.1 - 0.1 - 0.1 v i o = 20 a; v cc = 4.5 v - 0 0.1 - 0.1 - 0.1 v i o = 20 a; v cc = 6.0 v - 0 0.1 - 0.1 - 0.1 v i o = 6.0 ma; v cc = 4.5 v - 0.15 0.26 - 0.33 - 0.4 v i o = 7.8 ma; v cc = 6.0 v - 0.16 0.26 - 0.33 - 0.4 v i i input leakage current v i = v cc or gnd; v cc = 6.0 v - - 0.1 - 1.0 1.0 1.0 a i oz off-state output current v i = v ih or v il ; v o = v cc or gnd; v cc = 6.0 v - - 0.5 - 5.0 10.0 10.0 a i cc supply current v i = v cc or gnd; i o = 0 a; v cc = 6.0 v - - 8.0 - 80 160 160 a c i input capacitance - 3.5 - pf 74hct257 v ih high-level input voltage v cc = 4.5 v to 5.5 v 2.0 1.6 - 2.0 - 2.0 - v v il low-level input voltage v cc = 4.5 v to 5.5 v - 1.2 0.8 - 0.8 - 0.8 v v oh high-level output voltage v i = v ih or v il ; v cc = 4.5 v i o = ? 20 a 4.4 4.5 - 4.4 - 4.4 - v i o = ? 6 ma 3.98 4.32 - 3.84 - 3.7 - v v ol low-level output voltage v i = v ih or v il ; v cc = 4.5 v - 0.1 - 0.1 i o = 20 a - 0 0.1 - 0.33 - 0.4 v i o = 6.0 ma - 0.15 0.26 - 1.0 - 1.0 v i i input leakage current v i = v cc or gnd; v cc = 5.5 v - - 0.1 - 5.0 - 10 a
74hc_hct257_5 ? nxp b.v. 2010. all rights reserved. product data sheet rev. 05 ? 13 january 2010 7 of 17 nxp semiconductors 74hc257; 74hct257 quad 2-input multiplexer; 3-state 10. dynamic characteristics i oz off-state output current v i = v ih or v il ; v cc = 5.5 v; v o = v cc or gnd per input pin; other inputs at v cc or gnd; i o = 0 a - - 0.5 - 80 - 160 a i cc supply current v i = v cc or gnd; i o = 0 a; v cc = 5.5 v - - 8.0 a i cc additional supply current v i = v cc ? 2.1 v; other inputs at v cc or gnd; v cc = 4.5 v to 5.5 v; i o = 0 a per input pin; ni0, ni1 inputs - 40 144 - 180 - 196 a per input pin; oe input - 135 486 - 608 - 662 a per input pin; s input - 70 252 - 315 - 343 a c i input capacitance - 3.5 - pf table 6. static characteristics ?continued at recommended operating conditions; voltag es are referenced to gnd (ground = 0 v). symbol parameter conditions 25 c ? 40 c to +85 c ? 40 c to +125 c unit min typ max min max min max table 7. dynamic characteristics voltages are referenced to gnd (ground = 0 v); for test circuit see figure 8 . symbol parameter conditions 25 c ? 40 c to +85 c ? 40 c to +125 c unit typ max max max 74hc257 t pd propagation delay nl0 to ny or nl1 to ny; see figure 6 [1] v cc = 2.0 v 36 110 140 165 ns v cc = 4.5 v 13 22 28 33 ns v cc = 5.0 v; c l = 15 pf 11 - - - ns v cc = 6.0 v 10 19 24 28 ns s to ny; see figure 6 v cc = 2.0 v 47 150 190 225 ns v cc = 4.5 v 17 30 38 45 ns v cc = 5.0 v; c l = 15 pf 14 - - - ns v cc = 6.0 v 14 26 33 38 ns t en enable time oe to ny; see figure 7 [2] v cc = 2.0 v 33 150 190 225 ns v cc = 4.5 v 12 30 38 45 ns v cc = 6.0 v 10 26 33 38 ns t dis disable time oe to ny; see figure 7 [3] v cc = 2.0 v 41 150 190 225 ns v cc = 4.5 v 15 30 38 45 ns v cc = 6.0 v 12 26 33 38 ns
74hc_hct257_5 ? nxp b.v. 2010. all rights reserved. product data sheet rev. 05 ? 13 january 2010 8 of 17 nxp semiconductors 74hc257; 74hct257 quad 2-input multiplexer; 3-state [1] t pd is the same as t phl , t plh . [2] t en is the same as t pzh , t pzl . [3] t dis is the same as t phz , t plz . [4] t t is the same as t thl , t tlh . [5] c pd is used to determine the dynamic power dissipation (p d in w). p d = c pd v cc 2 f i n + (c l v cc 2 f o ) where: f i = input frequency in mhz; f o = output frequency in mhz; c l = output load capacitance in pf; v cc = supply voltage in v; n = number of inputs switching; (c l v cc 2 f o ) = sum of outputs. t t transition time see figure 6 [4] v cc = 2.0 v 14 60 75 90 ns v cc = 4.5 v 5 12 15 18 ns v cc = 6.0 v 4 10 13 15 ns c pd power dissipation capacitance per multiplexer; v i = gnd to v cc [5] 45 - pf 74hct257 t pd propagation delay nl0 to ny or nl1 to ny; see figure 6 [1] v cc = 4.5 v 16 30 38 45 ns v cc = 5.0 v; c l = 15 pf 13 - - ns s to ny; see figure 6 v cc = 4.5 v 20 35 44 53 ns v cc = 5.0 v; c l = 15 pf 17 - ns t en enable time oe to ny; v cc = 4.5 v; see figure 7 [2] 15 30 38 45 ns t dis disable time oe to ny; v cc = 4.5 v; see figure 7 [3] 16 30 38 45 ns t t transition time v cc = 4.5 v; see figure 6 [4] 5 12 15 18 ns c pd power dissipation capacitance per multiplexer; v i = gnd to v cc [5] 45 - pf table 7. dynamic characteristics ?continued voltages are referenced to gnd (gr ound = 0 v); for test circuit see figure 8 . symbol parameter conditions 25 c ? 40 c to +85 c ? 40 c to +125 c unit typ max max max
74hc_hct257_5 ? nxp b.v. 2010. all rights reserved. product data sheet rev. 05 ? 13 january 2010 9 of 17 nxp semiconductors 74hc257; 74hct257 quad 2-input multiplexer; 3-state 11. waveforms measurement points are given in table 8 . v ol and v oh are typical voltage output levels that occur with the output load. fig 6. propagation delays input (s, ni0, ni1) to output (ny) and output (ny) transition times 001aad47 7 t plh t phl v m v m 90 % 10 % v m v m output ny input s, ni0, ni1 v i gnd v oh v ol t tlh t thl measurement points are given in table 8 . v ol and v oh are typical voltage output levels that occur with the output load. fig 7. 3-state output enable and disable times 001aac47 9 t plz t phz outputs disabled outputs enabled 90 % 10 % outputs enabled oe input v i v cc v ol v oh gnd gnd v m t pzl t pzh v m v m output low-to-off off-to-low output high-to-off off-to-high t r t f 90 % 10 % table 8. measurement points type input output v m v m 74hc257 0.5v cc 0.5v cc 74hct257 1.3 v 1.3 v
74hc_hct257_5 ? nxp b.v. 2010. all rights reserved. product data sheet rev. 05 ? 13 january 2010 10 of 17 nxp semiconductors 74hc257; 74hct257 quad 2-input multiplexer; 3-state measurement points are given in table 8 and test data is given in table 9 . definitions test circuit: r t = termination resistance should be equal to output impedance z o of the pulse generator. c l = load capacitance including jig and probe capacitance. r l = load resistor. fig 8. test circuit for switching times v m v m t w t w 10 % 90 % 0 v v i v i negative pulse positive pulse 0 v v m v m 90 % 10 % t f t r t r t f 001aad98 3 dut v cc v cc v i v o r t r l s1 c l open g table 9. test data type input load switch position v i t r , t f c l r l t phl , t plh t pzh , t phz t pzl , t plz 74hc257 v cc 6 ns 50 pf 1 k open gnd v cc 74hct257 3 v 6 ns 50 pf 1 k open gnd v cc
74hc_hct257_5 ? nxp b.v. 2010. all rights reserved. product data sheet rev. 05 ? 13 january 2010 11 of 17 nxp semiconductors 74hc257; 74hct257 quad 2-input multiplexer; 3-state 12. package outline fig 9. package outline sot38-4 (dip16) references outline version european projection issue date iec jedec jeita sot38-4 95-01-14 03-02-13 m h c (e ) 1 m e a l seating plane a 1 w m b 1 b 2 e d a 2 z 16 1 9 8 e pin 1 index b 0 5 10 mm scale note 1. plastic or metal protrusions of 0.25 mm (0.01 inch) maximum per side are not included. unit a max. 12 b 1 (1) (1) (1) b 2 cd e e m z h l mm dimensions (inch dimensions are derived from the original mm dimensions) a min. a max. b max. w m e e 1 1.73 1.30 0.53 0.38 0.36 0.23 19.50 18.55 6.48 6.20 3.60 3.05 0.254 2.54 7.62 8.25 7.80 10.0 8.3 0.76 4.2 0.51 3.2 inches 0.068 0.051 0.021 0.015 0.014 0.009 1.25 0.85 0.049 0.033 0.77 0.73 0.26 0.24 0.14 0.12 0.01 0.1 0.3 0.32 0.31 0.39 0.33 0.03 0.17 0.02 0.13 d ip16: plastic dual in-line package; 16 leads (300 mil) sot38 -4
74hc_hct257_5 ? nxp b.v. 2010. all rights reserved. product data sheet rev. 05 ? 13 january 2010 12 of 17 nxp semiconductors 74hc257; 74hct257 quad 2-input multiplexer; 3-state fig 10. package outline sot109-1 (so16) x w m a a 1 a 2 b p d h e l p q detail x e z e c l v m a (a ) 3 a 8 9 1 16 y pin 1 index unit a max. a 1 a 2 a 3 b p cd (1) e (1) (1) eh e ll p qz y w v references outline version european projection issue date iec jedec jeita mm inches 1.75 0.25 0.10 1.45 1.25 0.25 0.49 0.36 0.25 0.19 10.0 9.8 4.0 3.8 1.27 6.2 5.8 0.7 0.6 0.7 0.3 8 0 o o 0.25 0.1 dimensions (inch dimensions are derived from the original mm dimensions) note 1. plastic or metal protrusions of 0.15 mm (0.006 inch) maximum per side are not included. 1.0 0.4 sot109-1 99-12-27 03-02-19 076e07 ms-012 0.069 0.010 0.004 0.057 0.049 0.01 0.019 0.014 0.0100 0.0075 0.39 0.38 0.16 0.15 0.05 1.05 0.041 0.244 0.228 0.028 0.020 0.028 0.012 0.01 0.25 0.01 0.004 0.039 0.016 0 2.5 5 mm scale s o16: plastic small outline package; 16 leads; body width 3.9 mm sot109 -1
74hc_hct257_5 ? nxp b.v. 2010. all rights reserved. product data sheet rev. 05 ? 13 january 2010 13 of 17 nxp semiconductors 74hc257; 74hct257 quad 2-input multiplexer; 3-state fig 11. package outline sot338-1 (ssop16) unit a 1 a 2 a 3 b p cd (1) e (1) eh e ll p qz y w v references outline version european projection issue date iec jedec jeita mm 0.21 0.05 1.80 1.65 0.25 0.38 0.25 0.20 0.09 6.4 6.0 5.4 5.2 0.65 1.25 7.9 7.6 1.03 0.63 0.9 0.7 1.00 0.55 8 0 o o 0.13 0.2 0.1 dimensions (mm are the original dimensions) note 1. plastic or metal protrusions of 0.25 mm maximum per side are not included. sot338-1 99-12-27 03-02-19 (1) w m b p d h e e z e c v m a x a y 1 8 16 9 a a 1 a 2 l p q detail x l (a ) 3 mo-150 pin 1 index 0 2.5 5 mm scale s sop16: plastic shrink small outline package; 16 leads; body width 5.3 mm sot338 -1 a max. 2
74hc_hct257_5 ? nxp b.v. 2010. all rights reserved. product data sheet rev. 05 ? 13 january 2010 14 of 17 nxp semiconductors 74hc257; 74hct257 quad 2-input multiplexer; 3-state fig 12. package outline sot403-1 (tssop16) unit a 1 a 2 a 3 b p cd (1) e (2) (1) eh e ll p qz y w v references outline version european projection issue date iec jedec jeita mm 0.15 0.05 0.95 0.80 0.30 0.19 0.2 0.1 5.1 4.9 4.5 4.3 0.65 6.6 6.2 0.4 0.3 0.40 0.06 8 0 o o 0.13 0.1 0.2 1 dimensions (mm are the original dimensions) notes 1. plastic or metal protrusions of 0.15 mm maximum per side are not included. 2. plastic interlead protrusions of 0.25 mm maximum per side are not included. 0.75 0.50 sot403-1 mo-153 99-12-27 03-02-18 w m b p d z e 0.25 18 16 9 a a 1 a 2 l p q detail x l (a ) 3 h e e c v m a x a y 0 2.5 5 mm scale tssop16: plastic thin shrink small outline package; 16 leads; body width 4.4 mm sot403 -1 a max. 1.1 pin 1 index
74hc_hct257_5 ? nxp b.v. 2010. all rights reserved. product data sheet rev. 05 ? 13 january 2010 15 of 17 nxp semiconductors 74hc257; 74hct257 quad 2-input multiplexer; 3-state 13. revision history table 10. revision history document id release date data sheet status change notice supersedes 74hc_hct257_5 20100113 product data sheet - 74hc_hct257_4 modifications: ? table 7 ? dynamic characteristics ? : changed 3oe to oe 74hc_hct257_4 20090608 product data sheet - 74hc_hct257_3 74hc_hct257_3 20050920 product data sheet - 74hc_hct257_cnv_2 74hc_hct257_cnv_2 19980930 product specification - -
74hc_hct257_5 ? nxp b.v. 2010. all rights reserved. product data sheet rev. 05 ? 13 january 2010 16 of 17 nxp semiconductors 74hc257; 74hct257 quad 2-input multiplexer; 3-state 14. legal information 14.1 data sheet status [1] please consult the most recently issued document before initiating or completing a design. [2] the term ?short data sheet? is explained in section ?definitions?. [3] the product status of device(s) described in this document may have changed since this document was published and may differ in case of multiple device s. the latest product status information is available on the internet at url http://www.nxp.com . 14.2 definitions draft ? the document is a draft versi on only. the content is still under internal review and subject to formal approval, which may result in modifications or additions. nxp semiconductors does not give any representations or warranties as to the accuracy or completeness of information included herein and shall hav e no liability for the consequences of use of such information. short data sheet ? a short data sheet is an extract from a full data sheet with the same product type number(s) and title. a short data sheet is intended for quick reference only and should not be relied upon to contain detailed and full information. for detailed and full information see the relevant full data sheet, which is available on request vi a the local nxp semiconductors sales office. in case of any inconsistency or conflict with the short data sheet, the full data sheet shall prevail. 14.3 disclaimers general ? information in this document is believed to be accurate and reliable. however, nxp semiconductors d oes not give any representations or warranties, expressed or implied, as to the accuracy or completeness of such information and shall have no liability for the consequences of use of such information. right to make changes ? nxp semiconductors reserves the right to make changes to information published in this document, including without limitation specifications and product descriptions, at any time and without notice. this document supersedes and replaces all information supplied prior to the publication hereof. suitability for use ? nxp semiconductors products are not designed, authorized or warranted to be suitable for use in medical, military, aircraft, space or life support equipment, nor in applications where failure or malfunction of an nxp semiconductors product can reasonably be expected to result in personal injury, death or severe property or environmental damage. nxp semiconductors accepts no liability for inclusion and/or use of nxp semiconductors products in such equipment or applications and therefore such inclusion and/or use is at the customer?s own risk. applications ? applications that are described herein for any of these products are for illustrative purpos es only. nxp semiconductors makes no representation or warranty that such applications will be suitable for the specified use without further testing or modification. limiting values ? stress above one or more limiting values (as defined in the absolute maximum ratings system of iec 60134) may cause permanent damage to the device. limiting values are stress ratings only and operation of the device at these or any other conditions above those given in the characteristics sections of this document is not implied. exposure to limiting values for extended periods may affect device reliability. terms and conditions of sale ? nxp semiconductors products are sold subject to the general terms and condit ions of commercial sale, as published at http://www.nxp.com/profile/terms , including those pertaining to warranty, intellectual property rights infringement and limitation of liability, unless explicitly otherwise agreed to in writ ing by nxp semiconductors. in case of any inconsistency or conflict between information in this document and such terms and conditions, the latter will prevail. no offer to sell or license ? nothing in this document may be interpreted or construed as an offer to sell products t hat is open for acceptance or the grant, conveyance or implication of any lic ense under any copyrights, patents or other industrial or intellectual property rights. export control ? this document as well as the item(s) described herein may be subject to export control regulations. export might require a prior authorization from national authorities. 14.4 trademarks notice: all referenced brands, produc t names, service names and trademarks are the property of their respective owners. 15. contact information for more information, please visit: http://www.nxp.com for sales office addresses, please send an email to: salesaddresses@nxp.com document status [1] [2] product status [3] definition objective [short] data sheet development this document contains data from the objec tive specification for product development. preliminary [short] data sheet qualification this document contains data from the preliminary specification. product [short] data sheet production this document contains the product specification.
nxp semiconductors 74hc257; 74hct257 quad 2-input multiplexer; 3-state ? nxp b.v. 2010. all rights reserved. for more information, please visit: http://www.nxp.com for sales office addresses, please se nd an email to: salesaddresses@nxp.com date of release: 13 january 2010 document identifier: 74hc_hct257_5 please be aware that important notices concerning this document and the product(s) described herein, have been included in section ?legal information?. 16. contents 1 general description . . . . . . . . . . . . . . . . . . . . . . 1 2 features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 3 ordering information . . . . . . . . . . . . . . . . . . . . . 2 4 functional diagram . . . . . . . . . . . . . . . . . . . . . . 2 5 pinning information . . . . . . . . . . . . . . . . . . . . . . 4 5.1 pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 5.2 pin description . . . . . . . . . . . . . . . . . . . . . . . . . 4 6 functional description . . . . . . . . . . . . . . . . . . . 4 6.1 function table . . . . . . . . . . . . . . . . . . . . . . . . . . 4 7 limiting values. . . . . . . . . . . . . . . . . . . . . . . . . . 5 8 recommended operating conditions. . . . . . . . 5 9 static characteristics. . . . . . . . . . . . . . . . . . . . . 6 10 dynamic characteristics . . . . . . . . . . . . . . . . . . 7 11 waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 12 package outline . . . . . . . . . . . . . . . . . . . . . . . . 11 13 revision history . . . . . . . . . . . . . . . . . . . . . . . . 15 14 legal information. . . . . . . . . . . . . . . . . . . . . . . 16 14.1 data sheet status . . . . . . . . . . . . . . . . . . . . . . 16 14.2 definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 14.3 disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 14.4 trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . . 16 15 contact information. . . . . . . . . . . . . . . . . . . . . 16 16 contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

▲Up To Search▲

Price & Availability of 74HC257N

	To Download 74HC257N Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .