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tc74lcx138f/ft/fk 2012-02-29 1 toshiba cmos digital integrat ed circuit silicon monolithic tc74lcx138f,tc74lcx138ft,tc74lcx138fk low-voltage 3-to-8 line decoder with 5-v tolerant inputs and outputs the tc74lcx138 is a high-performance cmos 3-to-8 decoder. designed for use in 3.3-v syst ems, it achieves high-speed operation while maintaining th e cmos low-power dissipation. the device is designed for low-voltage (3.3 v) v cc applications, but it could be used to interface to 5-v supply environment for inputs. when the device is enabled, 3 binary select inputs (a, b and c) determine which one of the outputs ( 0y - 7y ) will go low. when enable input g1 is held low or either 2ag or 2bg is held high, decoding function is inhibited and all outputs go high. g1, 2ag , and 2bg inputs are provided to ease cascade connection and for use as an address decoder for memory systems. all inputs are equipped with prot ection circuits against static discharge. features ? low-voltage operation: v cc = 1.65 to 3.6 v ? high-speed operation: t pd = 6.0 ns (max) (v cc = 3.0 to 3.6 v) ? ouput current: |i oh |/i ol = 24 ma (min) (v cc = 3.0 v) ? latch-up performance: 500 ma ? available in jeita sop, tssop and vssop (us) ? power-down protection provided on all inputs and outputs ? pin and function compatible with the 74 series (74ac/vhc/hc/f/als/ls etc.) 138 type w weight sop16-p-300-1.27a : 0.18 g (typ.) tssop16-p-0044-0.65a : 0.06 g (typ.) vssop16-p-0030-0.50 : 0.02 g (typ.) note: the electrical characteristics of v cc =1.80.15v is only applicable fo r products which manufactured from january 2009 onward. tc74lcx138f tc74lcx138ft tc74lcx138fk
tc74lcx138f/ft/fk 2012-02-29 2 pin assignment (top view) iec logic symbol truth table inputs outputs enable select g1 a2g b2 g c b a 0y 1y 2y 3y 4y 5y 6y 7 y selected output l x x x x x h h h h h h h h none x h x x x x h h h h h h h h none x x h x x x h h h h h h h h none h l l l l l l h h h h h h h 0y h l l l l h h l h h h h h h 1 y h l l l h l h h l h h h h h 2 y h l l l h h h h h l h h h h 3 y h l l h l l h h h h l h h h 4 y h l l h l h h h h h h l h h 5 y h l l h h l h h h h h h l h 6y h l l h h h h h h h h h h l 7 y x: don?t care v cc 16 0y 1y 2y 3y 4y 15 14 13 12 11 10 a 1 2 3 4 5 6 7 b c a2g b2g g1 7y 5y 8 gnd 9 6y 1 en 0 3 2 5 4 7 6 b a c g1 a2g (14) (15) (12) (13) (10) (11) (7) (9) (1) (3) (2) (6) (5) (4) 2 1 4 & bin/oct 1y 3y 5y 6y 0y b2g 2y 4y 7y 0 g 7 1 0 3 2 5 4 7 6 b a c g1 a2g (14) (15) (12) (13) (10) (11) (7) (9) (1) (3) (2) (6) (5) (4) 0 2 & dmux 1 y 3y 5y 6y 0y b2g 2 y 7 y 4 y
tc74lcx138f/ft/fk 2012-02-29 3 system diagram absolute maximum ratings (note 1) characteristics symbol rating unit power supply voltage v cc ? 0.5 to 7.0 v dc input voltage v in ? 0.5 to 7.0 v ? 0.5 to 7.0 (note 2) dc output voltage v out ? 0.5 to v cc + 0.5 (note 3) v input diode current i ik ? 50 ma output diode current i ok 50 (note 4) ma dc output current i out 50 ma power dissipation p d 180 mw dc v cc /ground current i cc /i gnd 100 ma storage temperature t stg ? 65 to 150 c note 1: exceeding any of the absolute maximum ratings, even briefly, lead to deterioration in ic performance or even destruction. using continuously under heavy loads (e.g. the app lication of high temperature/current/voltage and the significant change in temperature, etc.) may cause this product to decrease in the reliability significantly even if the operating range (i.e. oper ating temperature/current/voltage , etc.) are within the absolute maximum ratings and the operating ranges. please design the appropriate reliability upon reviewing the toshiba semiconductor reliability handbook (?handling precautions?/?derating concept and methods?) and individual reliability data (i.e. reliability test report and estimated failure rate, etc). note 2: v cc = 0 v note 3: high or low state. i out absolute maximum rating must be observed. note 4: v out < gnd, v out > v cc a b c 1 2 3 4 5 6 select inputs enable inputs a2g b2g g1 15 data outputs 14 1y 13 2y 12 11 4y 10 9 7 7y 0 y 3 y 5 y 6 y
tc74lcx138f/ft/fk 2012-02-29 4 operating ranges (note 1) characteristics symbol rating unit 1.65 to 3.6 power supply voltage v cc 1.5 to 3.6 (note 2) v input voltage v in 0 to 5.5 v 0 to 5.5 (note 3) output voltage v out 0 to v cc (note 4) v 24 (note 5) output current i oh /i ol 12 (note 6) ma operating temperature t opr ? 40 to 85 c input rise and fall time dt/dv 0 to 10 (note 7) ns/v note 1: the operating ranges must be maintai ned to ensure the normal op eration of the device. unused inputs must be tied to either v cc or gnd. note 2: data retention only note 3: v cc = 0 v note 4: high or low state note 5: v cc = 3.0 to 3.6 v note 6: v cc = 2.7 to 3.0 v note 7: v in = 0.8 to 2.0 v, v cc = 3.0 v
tc74lcx138f/ft/fk 2012-02-29 5 electrical characteristics dc characteristics (ta = ? 40 to 85c) characteristics symbol test condition v cc (v) min max unit 1.65 to 2.3 v cc 0.9 ? 2.3 to 2.7 1.7 ? h-level v ih ? 2.7 to 3.6 2.0 ? 1.65 to 2.3 ? v cc 0.1 2.3 to 2.7 ? 0.7 input voltage l-level v il ? 2.7 to 3.6 ? 0.8 v i oh = ? 100 a 1.65 to 3.6 v cc ? 0.2 ? i oh = ? 4 ma 1.65 1.05 ? i oh = ? 8 ma 2.3 1.7 ? i oh = ? 12 ma 2.7 2.2 ? i oh = ? 18 ma 3.0 2.4 ? h-level v oh v in = v ih or v il i oh = ? 24 ma 3.0 2.2 ? i ol = 100 a 1.65 to 3.6 ? 0.2 i ol = 4 ma 1.65 ? 0.45 i ol = 8 ma 2.3 ? 0.7 i ol = 12 ma 2.7 ? 0.4 i ol = 16 ma 3.0 ? 0.4 output voltage l-level v ol v in = v ih or v il i ol = 24 ma 3.0 ? 0.55 v input leakage current i in v in = 0 to 5.5 v 1.65 to 3.6 ? 5.0 a power-off leakage current i off v in /v out = 5.5 v 0 ? 10.0 a v in = v cc or gnd 1.65 to 3.6 ? 10.0 quiescent supply current i cc v in = 3.6 to 5.5 v 1.65 to 3.6 ? 10.0 increase in icc per input i cc v ih = v cc ? 0.6 v 2.7 to 3.6 ? 500 a
tc74lcx138f/ft/fk 2012-02-29 6 ac characteristics (ta = ? 40 to 85c) characteristics symbol test condition v cc (v) min max unit 1.8 0.15 ? 25.0 2.5 0.2 ? 8.0 2.7 ? 7.0 propagation delay time (a, b, c- y) t plh t phl figure 1, figure 2 3.3 0.3 1.5 6.0 ns 1.8 0.15 ? 25.0 2.5 0.2 ? 9.0 2.7 ? 8.0 propagation delay time (g1- y) t plh t phl figure 1, figure 2 3.3 0.3 1.5 7.0 ns 1.8 0.15 ? 25.0 2.5 0.2 ? 8.0 2.7 ? 7.0 propagation delay time ( 2g - y) t plh t phl figure 1, figure 2 3.3 0.3 1.5 6.0 ns 2.7 ? ? output to output skew t oslh t oshl (note) 3.3 0.3 ? 1.0 ns note: parameter guaranteed by design. (t oslh = |t plhm ? t plhn |, t oshl = |t phlm ? t phln |) dynamic switching characteristics (ta = 25c, input: t r = t f = 2.5 ns, c l = 50 pf, r l = 500 ) characteristics symbol test condition v cc (v) typ. unit quiet output maximum dynamic v ol v olp v ih = 3.3 v, v il = 0 v 3.3 0.8 v quiet output minimum dynamic v ol |v olv | v ih = 3.3 v, v il = 0 v 3.3 0.8 v capacitive characteristics (ta = 25c) characteristics symbol test condition v cc (v) typ. unit input capacitance c in ? 3.3 7 pf output capacitance c out ? 0 8 pf power dissipation capacitance c pd f in = 10 mhz (note) 3.3 25 pf note: c pd is defined as the value of the internal equivalent capacitance which is ca lculated from the operating current consumption without load. average operating current can be obtained by the equation: i cc (opr) = c pd ?v cc ?f in + i cc
tc74lcx138f/ft/fk 2012-02-29 7 ac test circuit ac waveform v cc symbol 3.3 0.3 v 2.7v 2.5 0.2 v 1.8 0.15 v v ih 2.7v v cc v cc v im 1.5v v cc /2 v cc /2 input tr,tf 2.5ns 2.0ns 2.0ns output v om 1.5v v oh /2 v oh /2 c l 50pf 30pf 30pf load r l 500 500 1k 90% 10% output input v ol v oh gnd v ih v om t plh t phl t f t r v im figure 2 t plh , t phl output measure r l c l figure 1
tc74lcx138f/ft/fk 2012-02-29 8 package dimensions weight: 0.18 g (typ.)
tc74lcx138f/ft/fk 2012-02-29 9 package dimensions weight: 0.06 g (typ.)
tc74lcx138f/ft/fk 2012-02-29 10 package dimensions weight: 0.02 g (typ.)
tc74lcx138f/ft/fk 2012-02-29 11 restrictions on product use ? toshiba corporation, and its subsidiaries and affiliates (collect ively "toshiba"), reserve the right to make changes to the in formation in this document, and related hardware, software and systems (collectively "product") without notice. ? this document and any information herein may not be reproduc ed without prior written permission from toshiba. even with toshiba's written permission, reproduc tion is permissible only if reproducti on is without alteration/omission. ? though toshiba works continually to improve product's quality and reliability, product can malfunction or fail. customers are responsible for complying with safety standards and for prov iding adequate designs and safeguards for their hardware, software and systems which minimize risk and avoid situat ions in which a malfunction or failure of product could cause loss of human life, b odily injury or damage to property, including data loss or corruption. before customers use the product, create designs including the product, or incorporate the product into their own applications, cu stomers must also refer to and comply with (a) the latest ve rsions of all relevant toshiba information, including without limitation, this document, the specifications, the data sheets and application notes for product and the precautions and condi tions set forth in the "toshiba se miconductor reliability handbook" and (b) the instructions for the application with which the product will be us ed with or for. customers are solely responsible for all aspe cts of their own product design or applications , including but not limited to (a) determining the appropriateness of the use of this product in such design or applications; (b) evaluating and determining the applicability of any information contained in this document, or in c harts, diagrams, programs, algorithms, sample application circuits, or any other referenced documents; and (c) validating all operatin g parameters for such designs and applications. toshiba assumes no liability for customers' product design or applications. ? product is neither intended nor warranted fo r use in equipments or systems that require extraordinarily high levels of quality and/or reliability, and/or a malfunction or failure of which may cause loss of human life, bodily injury, serious property damage and/or serious public impact ( " unintended use " ). except for specific appl ications as expressly stated in this document, unintended use includes, without limitation, equipment used in nuclear facilities, equipment used in the aerospace industry, medical equipment, equipment used f or automobiles, trains, ships and other transportation, traffic si gnaling equipment, equipment used to control combustions or expl osions, safety devices, elevators and escalators, devices related to electric power, and equipment used in financ e-related fields. if you use product for unintended use, toshiba assumes no liability for product. for details, please contact your toshiba sales representative. ? do not disassemble, analyze, reverse-engineer, alter, modify, translate or copy product, whether in whole or in part. ? product shall not be used for or incorporated into any products or systems whose manufacture, use, or sale is prohibited under any applicable laws or regulations. ? the information contained herein is presented only as guidance for product use. no re sponsibility is assumed by toshiba for an y infringement of patents or any other intellectual property rights of third parties that may result from the use of product. no license to any intellectual property right is granted by this documen t, whether express or implied, by estoppel or otherwise. ? absent a written signed agreement, except as provid ed in the relevant terms and conditions of sale for product, and to the maximum extent allowable by law, toshiba (1) assumes no liability whatsoever, including without limitation, indirect, co nsequential, special, or incidental damages or loss, including without limitation, loss of profit s, loss of opportunities, business interruption and loss of data, and (2) disclaims any and all express or implied warranties and conditions related to sale, use of product, or information, including warranties or conditions of merchantability, fitness for a particular purpose, accuracy of information, or noninfringement. ? do not use or otherwise make available product or related soft ware or technology for any military purposes, including without limitation, for the design, development, use, stockpiling or manufacturing of nuclear, chemical , or biological weapons or missi le technology products (mass destruction w eapons). product and related software and technology may be controlled under the applicable export laws and regulations including, without limitat ion, the japanese foreign exchange and foreign trade law and t he u.s. export administration regulat ions. export and re-export of product or related software or technology are strictly prohibit ed except in compliance with all appl icable export laws and regulations. ? please contact your toshiba sales representative for details as to environmental matters such as the rohs compatibility of pro duct. please use product in compliance with all applicable laws and regula tions that regulate the inclusion or use of controlled subs tances, including without limitation, the eu rohs directive. toshiba assumes no liability for damages or losses occurring as a result of noncompliance with applicable laws and regulations.

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