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this is information on a product in full production. october 2012 doc id 4980 rev 8 1/16 16 74lcx125 low-voltage cmos quad bus buffer (3-state) with 5 v tolerant inputs and outputs datasheet ? production data features 5 v tolerant inputs and outputs high speed ?t pd = 5.2 ns (max.) at v cc = 3 v power-down protection on inputs and outputs symmetrical output impedance ?|i oh | = i ol = 24 ma (min.) at v cc = 3 v pci bus levels guaranteed at 24 ma balanced propagation delay ?t plh ? t phl operating voltage range ?v cc (opr.) = 2.0 v to 3.6 v pin and function compatible with 74 series 125 latch-up performance exceeds 500 ma (jesd 17) esd performance ? hbm: 2000 v (mil std 883 method 3015) ? mm: 200 v ? cdm: 1000 v applications automotive industrial computer consumer description the 74lcx125 device is a low-voltage cmos quad bus buffer manufactured with sub-micron silicon gate and double-layer metal wiring c 2 mos technology. it is ideal for low-power and high- speed 3.3 v applications and can be interfaced to a 5 v signal environment for both inputs and outputs. the device requires the 3-state control input g to be set high to place the output in the high impedance state. it has the same speed performance at 3.3 v as the 5 v ac/act family, combined with lower power consumption. all inputs and outputs are equipped with protection circuits against static discharge, giving them 2 kv esd immunity and transient excess voltage. tssop14 so-14 table 1. device summary order code temperature range package packaging marking 74lcx125ttr -40/+85 c tssop14 tape and reel lcx125 74lcx125yttr (1) -40/+85 c tssop14 (automotive grade) tape and reel lcx125y 74lcx125mtr -40/+85 c so-14 tape and reel 74lcx125 74LCX125YMTR (1) -40/+85 c so-14 (automotive grade) tape and reel 74lcx125y 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
contents 74lcx125 2/16 doc id 4980 rev 8 contents 1 logic symbols and i/o equivalent circuit . . . . . . . . . . . . . . . . . . . . . . . . 3 2 pin settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2.1 pin connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2.2 pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2.3 truth table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 recommended operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 5 test circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 6 waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 7 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 8 revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
74lcx125 logic symbols and i/o equivalent circuit doc id 4980 rev 8 3/16 1 logic symbols and i/o equivalent circuit figure 1. iec logic symbols figure 2. input and output equivalent circuit
pin settings 74lcx125 4/16 doc id 4980 rev 8 2 pin settings 2.1 pin connections figure 3. pin connections (top through view) 2.2 pin description 2.3 truth table table 2. pin description pin number 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 table 3. truth table inputs output ag y a x (1) 1. ?do not care?. h a z (2) 2. high impedance. lll hlh
74lcx125 maximum ratings doc id 4980 rev 8 5/16 3 maximum ratings stressing the device above the rating listed in table 4: absolute maximum ratings may cause permanent damage to the device. these are stress ratings only and operation of the device at these or any other conditions above those indicated in table 5: recommended operating conditions of this specification is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. recommended operating conditions table 4. absolute maximum ratings symbol parameter value unit v cc supply voltage -0.5 to +7.0 v v i dc input voltage -0.5 to +7.0 v v o dc output voltage (v cc = 0 v) -0.5 to +7.0 v v o dc output voltage (high or low state) (1) 1. i o absolute maximum rating must be observed. -0.5 to v cc + 0.5 v i ik dc input diode current -50 ma i ok dc output diode current (2) 2. v o < gnd. -50 ma i o dc output current 50 ma i cc dc supply current per supply pin 100 ma i gnd dc ground current per supply pin 100 ma t stg storage temperature -65 to +150 c t l lead temperature (10 sec.) 300 c table 5. recommended operating conditions symbol parameter value unit v cc supply voltage (1) 1. truth table guaranteed: 1.5 v to 3.6 v. 2.0 to 3.6 v v i input voltage 0 to 5.5 v v o output voltage (v cc = 0 v) 0 to 5.5 v v o output voltage (high or low state) 0 to v cc v i oh , i ol high or low level output current (v cc = 3.0 to 3.6 v) 24 ma i oh , i ol high or low level output current (v cc = 2.7 v) 12 ma dt/dv input rise and fall time (2) 2. v in from 0.8 v to 2 v at v cc = 3.0 v. 0 to 10 ns/v
electrical characteristics 74lcx125 6/16 doc id 4980 rev 8 4 electrical characteristics table 6. dc specifications symbol parameter test condition value unit v cc (v) -40 to 85 c min. max. v ih high level input voltage 2.7 to 3.6 2.0 v v il low level input voltage 0.8 v v oh high level output voltage 2.7 to 3.6 i o = -100 av cc - 0.2 v 2.7 i o = -12 ma 2.2 3.0 i o = -18 ma 2.4 i o = -24 ma 2.2 v ol low level output voltage 2.7 to 3.6 i o = 100 a0.2 v 2.7 i o = 12 ma 0.4 3.0 i o = 16 ma 0.4 i o = 24 ma 0.55 i i input leakage current 2.7 to 3.6 v i = 0 to 5.5 v 5 a i off power off leakage current 0v i or v o = 5.5 v 10 a i oz high impedance output leakage current 2.7 to 3.6 v i = v ih or v il v o = 0 to v cc 5 a i cc quiescent supply current 2.7 to 3.6 v i = v cc or gnd 10 a v i or v o = 3.6 to 5.5 v 10 i cc i incr. per input 2.7 to 3.6 v ih = v cc - 0.6 v 500 a table 7. dynamic switching characteristics symbol parameter test condition value unit v cc (v) t a = 25 c min. typ. max. v olp dynamic low level quiet output (1) 1. number of outputs defined as ?n?. measured with ?n-1? outputs switching from high to low or low to high. the remaining output is measured in the low state. 3.3 c l = 50 pf v il = 0 v, v ih = 3.3 v 0.8 v v olv -0.8
74lcx125 electrical characteristics doc id 4980 rev 8 7/16 table 8. ac electrical characteristics symbol parameter test condition value unit v cc (v) c l (pf) r l ( ) t s = t r (ns) -40 to 85 c min. max. t plh , t phl propagation delay time 2.7 50 500 2.5 6.0 ns 3.0 to 3.6 1.0 5.2 t pzl , t pzh output enable time to high and low level 2.7 50 500 2.5 1.0 6.0 ns 3.0 to 3.6 1.0 5.0 t plz , t phz output disable time to high and low level 2.7 50 500 2.5 1.0 6.0 ns 3.0 to 3.6 1.0 5.0 t oslh t oshl output to output skew time (1) (2) 1. skew is defined as the absolute value of the difference between the actual propagation delay for any two outputs of the same device switching in the same direction, either high or low (t oslh = | t plhm - t plhn |, t oshl = | t phlm - t phln |). 2. parameter guaranteed by design. 3.0 to 3.6 50 500 2.5 1.0 ns table 9. capacitive characteristics symbol parameter test condition value unit v cc (v) t a = 25 c min. typ. max. c in input capacitance 3.3 v in = 0 to v cc 5pf c out output capacitance 3.3 v in = 0 to v cc 10 pf c pd power dissipation capacitance (1) 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 table 10: 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 gate). 3.3 f in = 10 mhz v in = 0 or v cc 37 pf
test circuit 74lcx125 8/16 doc id 4980 rev 8 5 test circuit figure 4. test circuit note: c l = 50 pf or equivalent (includes jig and probe capacitance) r l = 500 or equivalent r t = z out of pulse generator (typically 50 ). table 10. test circuit test switch t plh , t phl open t pzl , t plz 6 v t pzh , t phz gnd
74lcx125 waveforms doc id 4980 rev 8 9/16 6 waveforms figure 5. propagation delay (f = 1 mhz; 50% duty cycle) figure 6. output enable and disable time (f = 1 mhz; 50% duty cycle)
package information 74lcx125 10/16 doc id 4980 rev 8 7 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.
74lcx125 package information doc id 4980 rev 8 11/16 figure 7. so-14 package outline table 11. so-14 package mechanical data symbol dimensions mm inch min. typ. max. min. typ. max. a 1.35 1.75 0.053 0.069 a1 0.1 0.25 0.004 0.010 a2 1.10 1.65 0.043 0.065 b 0.33 0.51 0.013 0.020 c 0.19 0.25 0.007 0.010 d 8.55 8.75 0.337 0.344 e 3.8 4.0 0.150 0.157 e 1.27 0.050 h 5.8 6.2 0.228 0.244 h 0.25 0.50 0.010 0.020 l 0.4 1.27 0.016 0.050 k 0 8 0 8 ddd 0.100 0.004
package information 74lcx125 12/16 doc id 4980 rev 8 figure 8. tssop14 package outline . table 12. tssop14 package mechanical data symbol dimensions mm inch 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 bsc 0.0256 bsc k 0 8 0 8 l 0.45 0.60 0.75 0.018 0.024 0.030
74lcx125 package information doc id 4980 rev 8 13/16 figure 9. tape and reel so-14 outline drawing is not in scale. table 13. tape and reel so-14 mechanical data symbol dimensions mm inch min. typ. max. min. typ. max. a 330 12.992 c 12.8 13.2 0.504 0.519 d 20.2 0.795 n 60 2.362 t 22.4 0.882 ao 6.4 6.6 0.252 0.260 bo 9 9.2 0.354 0.362 ko 2.1 2.3 0.082 0.090 po 3.9 4.1 0.153 0.161 p 7.9 8.1 0.311 0.319
package information 74lcx125 14/16 doc id 4980 rev 8 figure 10. tape and reel tssop14 outline drawing is not in scale. . table 14. tape and reel tssop14 mechanical data symbol dimensions mm inch min. typ. max. min. typ. max. a 330 12.992 c 12.8 13.2 0.504 0.519 d 20.2 0.795 n 60 2.362 t 22.4 0.882 ao 6.7 6.9 0.264 0.272 bo 5.3 5.5 0.209 0.217 ko 1.6 1.8 0.063 0.071 po 3.9 4.1 0.153 0.161 p 7.9 8.1 0.311 0.319
74lcx125 revision history doc id 4980 rev 8 15/16 8 revision history table 15. document revision history date revision changes 15-sep-2004 5 ordering codes revision - pag. 1 13-jul-2006 6 new template, temperature ranges updated 20-jun-2012 7 added applications on page 1 updated table 1: device summary on page 1 updated t op in table 5: recommended operating conditions updated ecopack ? text in section 7: package information minor textual updates 02-oct-2012 8 updated esd performance in features (updated hbm and mm, added cdm). added 74LCX125YMTR device and ?marking? to ta b l e 1 , updated temperature range and note 1 . updated section 3: maximum ratings (added cross-references). removed ?operating temperature? from ta ble 5 . reformatted section 7: package information . minor corrections throughout document.
74lcx125 16/16 doc id 4980 rev 8 please read carefully: information in this document is provided solely in connection with st products. stmicroelectronics nv and its subsidiaries (?st ?) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described he rein at an y time, without notice. all st products are sold pursuant to st?s terms and conditions of sale. purchasers are solely responsible for the choice, selection and use of the st products and services described herein, and st as sumes no liability whatsoever relating to the choice, selection or use of the st products and services described herein. no license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. i f any part of this document refers to any third party products or services it shall not be deemed a license grant by st for the use of such third party products or services, or any intellectual property contained therein or considered as a warranty covering the use in any manner whatsoev er of such third party products or services or any intellectual property contained therein. unless otherwise set forth in st?s terms and conditions of sale st disclaims any express or implied warranty with respect to the use and/or sale of st products including without limitation implied warranties of merchantability, fitness for a particular purpose (and their equivalents under the laws of any jurisdiction), or infringement of any patent, copyright or other intellectual property right. unless expressly approved in writing by two authorized st representatives, st products are not recommended, authorized or warranted for use in military, air craft, space, life saving, or life sustaining applications, nor in products or systems where failure or malfunction may result in personal injury, death, or severe property or environmental damage. st products which are not specified as "automotive grade" may only be used in automotive applications at user?s own risk. resale of st products with provisions different from the statements and/or technical features set forth in this document shall immediately void any warranty granted by st for the st product or service described herein and shall not create or extend in any manner whatsoev er, any liability of st. st and the st logo are trademarks or registered trademarks of st in various countries. information in this document supersedes and replaces all information previously supplied. the st logo is a registered trademark of stmicroelectronics. all other names are the property of their respective owners. ? 2012 stmicroelectronics - all rights reserved stmicroelectronics group of companies australia - belgium - brazil - canada - china - czech republic - finland - france - germany - hong kong - india - israel - ital y - japan - malaysia - malta - morocco - philippines - singapore - spain - sweden - switzerland - united kingdom - united states of america www.st.com

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