? semiconductor components industries, llc, 2005 april, 2005 ? rev. 10 1 publication order number: 74vcxh245/d 74vcxh245 low-voltage 1.8/2.5/3.3 v 8-bit transceiver (3?state, non?inverting with bushold) the 74vcxh245 is an advanced performance, non?inverting 8?bit transceiver. it is designed for very high?speed, very low?power operation in 1.8 v, 2.5 v or 3.3 v systems. the 74vcxh245 is designed as a byte control. the transmit/receive (t/r n) inputs determine the direction of data flow through the bidirectional transceiver. transmit (active?high) enables data from a ports to b ports; receive (active?low) enables data from b to a ports. the output enable input (oe ), when high, disables both a and b ports by placing them in a high z condition. the data inputs include active bushold circuitry, eliminating the need for external pullup resistors to hold unused or floating inputs at a valid logic state. features ? designed for low voltage operation: v cc = 1.65?3.6 v ? high speed operation: 3.5 ns max for 3.0 to 3.6 v 4.2 ns max for 2.3 to 2.7 v 8.4 ns max for 1.65 to 1.95 v ? static drive: 24 ma drive at 3.0 v 18 ma drive at 2.3 v 6 ma drive at 1.65 v ? includes active bushold to hold unused or floating data inputs at a valid logic state ? near zero static supply current in all three logic states (20 a) substantially reduces system power requirements ? latchup performance exceeds 200 ma @ 85 c ? esd performance: human body model >2000 v machine model >200 v ? pb?free package is available *for additional information on our pb?free strategy and soldering details, please download the on semiconductor soldering and mounting techniques reference manual, solderrm/d. http://onsemi.com marking diagram qfn mnr2 suffix case 485aa a = assembly location l = wafer lot y = year w = work week = pb?free package (note: microdot may be in either location) device package shipping 2 ordering information 74VCXH245MNR2 qfn 3000/tape&reel 74VCXH245MNR2g qfn (pb?free) 3000/tape&reel 1 vcx h245 alyw 2for information on tape and reel specifications, including part orientation and tape sizes, please refer to our t ape and reel packaging specifications brochure, brd8011/d. pinout (top view) pin #1 29 19 12 20 10 11 qfn
74vcxh245 http://onsemi.com 2 b0 oe 19 t/r 1 a0 b1 a1 b2 a2 b3 a3 b4 a4 b5 a5 b6 a6 b7 a7 2 3 4 5 6 7 8 9 18 17 16 15 14 13 12 11 figure 1. logic diagram v cc = pin 20 gnd = pin 10 truth table operating mode non?inverting inputs l l h oe t/r l h x b data to a bus a data to b bus z state h = high voltage level l = low voltage level z = high impedance state x = high or low voltage level and transitions are acceptable pin names function output enable input transmit/receive input side a bushold inputs or 3?state outputs side b bushold inputs or 3?state outputs pins oe t/r a0?a7 b0?b7 absolute maximum ratings symbol parameter value condition unit v cc dc supply voltage ?0.5 to + 4.6 v v i dc input voltage ?0.5 v i v cc + 0.5 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 device damage can occur. maximum ratings applied to the device are individual str ess limit values (not normal operating conditions) and are not valid simultaneously. if these limits are exceeded, device functional operation i s not implied, damage may occur and reliability may be affected. 1. i o absolute maximum rating must be observed.
74vcxh245 http://onsemi.com 3 recommended operating conditions (note 2) symbol parameter min typ max unit v cc supply voltage operating data retention only 1.65 1.2 3.3 3.3 3.6 3.6 v v i input voltage ?0.3 v cc v v o output voltage 0 v cc v i oh high level output current, v cc = 3.0 v ? 3.6 v ?24 ma i ol low level output current, v cc = 3.0 v ? 3.6 v 24 ma i oh high level output current, v cc = 2.3 v ? 2.7 v ?18 ma i ol low level output current, v cc = 2.3 v ? 2.7 v 18 ma i oh high level output current, v cc = 1.65 v ? 1.95 v ?6 ma i ol low level output current, v cc = 1.65 v ? 1.95 v 6 ma t a operating free?air temperature ?40 +85 c t/ 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 2. floating or unused control inputs must be held high or low. 4.80 figure 2. 20 pad qfn suggested board layout (bottom view) 2.8 3.45 1.45 0.65 x max = 0.28 pitch 0.5 all dimensions in mm.
74vcxh245 http://onsemi.com 4 dc electrical characteristics t a = ?40 c to +85 c symbol characteristic condition min max unit v ih high level input voltage (note 3) 1.65 v v cc < 1.95 v 0.65 x v cc v 2.3 v v cc 2.7 v 1.6 2.7 v < v cc 3.6 v 2.0 v il low level input voltage (note 3) 1.65 v v cc < 1.95 v 0.35 x v cc v 2.3 v v cc 2.7 v 0.7 2.7 v < v cc 3.6 v 0.8 v oh high level output voltage 1.65 v v cc 3.6 v; i oh = ?100 a v cc ? 0.2 v v cc = 1.65 v; i oh = ?6 ma 1.25 v cc = 2.3 v; i oh = ?6 ma 2.0 v cc = 2.3 v; i oh = ?12 ma 1.8 v cc = 2.3 v; i oh = ?18 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 low level output voltage 1.65 v v cc 3.6 v; i ol = 100 a 0.2 v v cc = 1.65 v; i ol = 6 ma 0.3 v cc = 2.3 v; i ol = 12 ma 0.4 v cc = 2.3 v; i ol = 18 ma 0.6 v cc = 2.7 v; i ol = 12 ma 0.4 v cc = 3.0 v; i ol = 18 ma 0.4 v cc = 3.0 v; i ol = 24 ma 0.55 i i input leakage current v in = v cc or gnd; v cc = 3.6 v 5.0 a i i(hold) minimum bushold input current v cc = 3.0 v, v in = 0.8 v 75 a () v cc = 3.0 v, v in = 2.0 v ?75 v cc = 2.3 v, v in = 0.7 v 45 v cc = 2.3 v, v in = 1.6 v ?45 v cc = 1.65 v, v in = 0.57 v 25 v cc = 1.65 v, v in = 1.07 v ?25 i i(od) minimum bushold over?drive current needed to change state v cc = 3.6 v, (note 4) 450 a () current needed to change state v cc = 3.6 v, (note 5) ?450 v cc = 2.7 v, (note 4) 300 v cc = 2.7 v, (note 5) ?300 v cc = 1.95 v, (note 4) 200 v cc = 1.95 v, (note 5) ?200 i oz 3?state output current v o = v cc or gnd; v cc = 3.6 v; v i = v ih or v il 10 a i cc quiescent supply current (note 6) 1.65 v v cc 3.6 v; v i = gnd or v cc 20 a i cc increase in i cc per input 2.7 v < v cc 3.6 v; v ih = v cc ? 0.6 v 750 a 3. these values of v i are used to test dc electrical characteristics only. 4. an external driver must source at least the specified current to switch from low?to?high. 5. an external driver must sink at least the specified current to switch from high?to?low. 6. outputs disabled or 3?state only.
74vcxh245 http://onsemi.com 5 ac characteristics (note 7; t r = t f = 2.0 ns; c l = 30 pf; r l = 500 ) limits t a = ?40 c to +85 c v cc = 3.0 v to 3.6 v v cc = 2.3 v to 2.7 v v cc = 1.65 v to1.95 v symbol parameter waveform min max min max min max unit t plh t phl propagation delay input to output 1 0.6 0.6 3.5 3.5 0.8 0.8 4.2 4.2 1.5 1.5 8.4 8.4 ns t pzh t pzl output enable time to high and low level 2 0.6 0.6 4.5 4.5 0.8 0.8 5.6 5.6 1.5 1.5 9.8 9.8 ns t phz t plz output disable time from high and low level 2 0.6 0.6 3.6 3.6 0.8 0.8 4.0 4.0 1.5 1.5 7.2 7.2 ns t oshl t oslh output?to?output skew (note 8) 0.5 0.5 0.5 0.5 0.75 0.75 ns 7. for c l = 50 pf, add approximately 300 ps to the ac maximum specification. 8. skew is defined as the absolute value of the difference between the actual propagation delay for any two separate outputs of the same d evice. the specification applies to any outputs switching in the same direction, either high?to?low (t oshl ) or low?to?high (t oslh ); parameter guaranteed by design. dynamic switching characteristics t a = +25 c symbol characteristic condition typ unit v olp dynamic low peak voltage (n ) v cc = 1.8 v, c l = 30 pf, v ih = v cc , v il = 0 v 0.3 v (note 9) v cc = 2.5 v, c l = 30 pf, v ih = v cc , v il = 0 v 0.7 v cc = 3.3 v, c l = 30 pf, v ih = v cc , v il = 0 v 1.0 v olv dynamic low valley voltage (n ) v cc = 1.8 v, c l = 30 pf, v ih = v cc , v il = 0 v ?0.3 v (note 9) v cc = 2.5 v, c l = 30 pf, v ih = v cc , v il = 0 v ?0.7 v cc = 3.3 v, c l = 30 pf, v ih = v cc , v il = 0 v ?1.0 v ohv dynamic high valley voltage (n ) v cc = 1.8 v, c l = 30 pf, v ih = v cc , v il = 0 v 1.3 v (note 10) v cc = 2.5 v, c l = 30 pf, v ih = v cc , v il = 0 v 1.7 v cc = 3.3 v, c l = 30 pf, v ih = v cc , v il = 0 v 2.0 9. number of outputs defined as ano. measured with an?1o outputs switching from high?to?low or low?to?high. the remaining output is measured in the low state. 10. number of outputs defined as ano. measured with an?1o outputs switching from high?to?low or low?to?high. the remaining outpu t is measured in the high state. capacitive characteristics symbol parameter condition typical unit c in input capacitance note 11 6 pf c out output capacitance note 11 7 pf c pd power dissipation capacitance note 11, 10 mhz 20 pf 11. v cc = 1.8, 2.5 or 3.3 v; v i = 0 v or v cc .
74vcxh245 http://onsemi.com 6 waveform 1 - propagation delays t r = t f = 2.0 ns, 10% to 90%; f = 1 mhz; t w = 500 ns v ih 0 v v oh v ol an, bn bn, an t phl t plh waveform 2 - output enable and disable times t r = t f = 2.0 ns, 10% to 90%; f = 1 mhz; t w = 500 ns v ih 0 v 0v oen , t/r n an, bn t pzh v cc t phz t pzl t plz an, bn vm vm vm vm vm vm figure 3. ac waveforms vm v oh vy vx v ol vm v cc symbol 3.3 v 0.3 v 2.5 v 0.2 v 1.8 v 0.15 v v ih 2.7 v v cc v cc v m 1.5 v v cc /2 v cc /2 v x v ol + 0.3 v v ol + 0.15 v v ol + 0.15 v v y v oh ? 0.3 v v oh ? 0.15 v v oh ? 0.15 v open pulse generator r t dut v cc r l r l c l 6 v or v cc 2 gnd test switch t plh , t phl open t pzl , t plz 6 v at v cc = 3.3 0.3 v; v cc 2 at v cc = 2.5 0.2 v; 1.8 v 0.15 v t pzh , t phz gnd c l = 30 pf or equivalent (includes jig and probe capacitance) r l = 500 or equivalent r t = z out of pulse generator (typically 50 ) figure 4. test circuit
74vcxh245 http://onsemi.com 7 package dimensions qfn mnr2 suffix case 485aa?01 issue a dim min max millimeters a a1 0.00 0.05 a2 0.65 0.75 a3 b 0.20 0.30 d 2.50 bsc d2 0.85 1.15 e 4.50 bsc e2 e 0.50 bsc k 0.20 --- notes: 1. dimensioning and tolerancing per asme y14.5m, 1994. 2. controlling dimension: millimeters. 3. dimensions b applies to plated terminal and is measured between 0.25 and 0.30 mm from terminal. 4. coplanarity applies to the exposed pad as well as the terminals. 0.20 ref b d2 l pin one reference e2 1 9 19 12 11 d e b a c 0.15 c 0.15 2x 2x e 2 e 20x 20x 0.10 c 0.05 c a b note 3 a 20x c k 20x a1 a2 (a3) seating plane c 0.08 c 0.10 0.80 1.00 l 0.35 0.45 2.85 3.15
74vcxh245 http://onsemi.com 8 on semiconductor and are registered trademarks of semiconductor components industries, llc (scillc). scillc reserves the right to mak e changes without further notice to any products herein. scillc makes no warranty, representation or guarantee regarding the suitability of its products for an y particular purpose, nor does scillc assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including wi thout limitation special, consequential or incidental damages. atypicalo parameters which may be provided in scillc data sheets and/or specifications can and do vary in different application s and actual performance may vary over time. all operating parameters, including atypicalso must be validated for each customer application by customer's technical experts. scillc does not convey any license under its patent rights nor the rights of others. scillc products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the scillc product could create a sit uation where personal injury or death may occur. should buyer purchase or use scillc products for any such unintended or unauthorized application, buyer shall indemnify and hold scillc and its officers, employees, subsidiaries, af filiates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, direct ly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that scillc was negligent regarding the design or manufacture of the part. scillc is an equal opportunity/affirmative action employer. this literature is subject to all applicable copyright laws and is not for resale in any manner. publication ordering information n. american technical support : 800?282?9855 toll free usa/canada japan : on semiconductor, japan customer focus center 2?9?1 kamimeguro, meguro?ku, tokyo, japan 153?0051 phone : 81?3?5773?3850 74vcxh245/d literature fulfillment : literature distribution center for on semiconductor p.o. box 61312, phoenix, arizona 85082?1312 usa phone : 480?829?7710 or 800?344?3860 toll free usa/canada fax : 480?829?7709 or 800?344?3867 toll free usa/canada email : orderlit@onsemi.com on semiconductor website : http://onsemi.com order literature : http://www.onsemi.com/litorder for additional information, please contact your local sales representative.
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