tc74ac138p/f/fn/ft 2007-10-01 1 toshiba cmos digital integrat ed ci rcuit silicon monolithic tc74ac138p,tc74ac138f, TC74AC138FN,tc74ac138ft 3-to-8 line decoder the tc74ac138 is an advanced high speed cmos 3-to-8 line decoder fabricated with silicon gate and double-layer metal wiring c2mos technology. it achieves the high speed op eration similar to equivalent bipolar schottky ttl while main taining the cmos low power dissipation. 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 a2g or 2bg is held high, decoding function is inhibited and all outputs go high. g1, a2g , 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 or transi ent excess voltage. features ? high speed: t pd = 5.9 ns (typ.) at v cc = 5 v ? low power dissipation: i cc = 8 a (max) at ta = 25c ? high noise immunity: v nih = v nil = 28% v cc (min) ? symmetrical output impedance: |i oh | = i ol = 24 ma (min) capability of driving 50 transmission lines. ? balanced propagation delays: t plh ? t phl ? wide operating voltage range: v cc (opr) = 2 to 5.5 v ? pin and function compatible with 74f138 note: xxxfn (jedec sop) is not available in japan. tc74ac138p tc74ac138f TC74AC138FN tc74ac138ft weight dip16-p-300-2.54a : 1.00 g (typ.) sop16-p-300-1.27a : 0.18 g (typ.) sol16-p-150-1.27 : 0.13 g (typ.) tssop16-p-0044-0.65a : 0.06 g (typ.)
tc74ac138p/f/fn/ft 2007-10-01 2 pin assignment iec logic symbol truth table inputs outputs enable select g1 a2g b2g c b a 0y 1y 2y 3y 4y 5y 6 y 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 0 y 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 6 y h l l h h h h h h h h h h l 7 y x: don?t care v cc 16 0y 15 14 13 12 11 10 1 2 3 4 5 6 7 2bg g1 7y gnd 8 9 (top view) b c a 1y 2y 3y 4y 5y 6y 2a g 7 en (1) (3) (2) b & c (6) g1 (15) (13) (11) (14) (12) (10) 2ag (4) (5) (9) (7) a bin/oct 0y 1y 2y 3y 4y 5y 6y 7y 1 2 4 0 1 2 3 4 5 6 2bg 7 (1) (3) (2) b & c (6) g1 (15) (13) (11) (14) (12) (10) 2ag (4) (5) (9) (7) a 0y 1y 2y 3y 4y 5y 6y 7y 0 2 0 1 2 3 4 5 6 2bg 7 0 g dmux
tc74ac138p/f/fn/ft 2007-10-01 3 logic diagram absolute maximum ratings (note 1) characteristics symbol rating unit supply voltage range v cc ? 0.5 to 7.0 v dc input voltage v in ? 0.5 to v cc + 0.5 v dc output voltage v out ? 0.5 to v cc + 0.5 v input diode current i ik 20 ma output diode current i ok 50 ma dc output current i out 50 ma dc v cc /ground current i cc 200 ma power dissipation p d 500 (dip) (note 2)/180 (sop/tssop) mw 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 conditions (i.e. operating temper ature/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: 500 mw in the range of ta = ? 40 to 65c. from ta = 65 to 85c a derating factor of ? 10 mw/c should be applied up to 300 mw. operating ranges (note) characteristics symbol rating unit supply voltage v cc 2.0 to 5.5 v input voltage v in 0 to v cc v output voltage v out 0 to v cc v operating temperature t opr ? 40 to 85 c input rise and fall time dt/dv 0 to 100 (v cc = 3.3 0.3 v) 0 to 20 (v cc = 5 0.5 v) ns/v note: the operating ranges must be maintained to ensure the normal oper ation of the device. unused inputs must be tied to either vcc or gnd. 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
tc74ac138p/f/fn/ft 2007-10-01 4 electrical characteristics dc characteristics ta = 25c ta = 40 to 85c characteristics symbol test condition v cc (v) min typ. max min max unit high-level input voltage v ih ? 2.0 3.0 5.5 1.5 2.10 3.85 ? ? ? ? ? ? 1.5 2.10 3.85 ? ? ? v low-level input voltage v il ? 2.0 3.0 5.5 ? ? ? ? ? ? 0.50 0.90 1.65 ? ? ? 0.50 0.90 1.65 v i oh = 50 a 2.0 3.0 4.5 1.9 2.9 4.4 2.0 3.0 4.5 ? ? ? 1.9 2.9 4.4 ? ? ? high-level output voltage v oh v in = v ih or v il i oh = 4 ma i oh = 24 ma i oh = 75 ma (note) 3.0 4.5 5.5 2.58 3.94 ? ? ? ? ? ? ? 2.48 3.80 3.85 ? ? ? v i ol = 50 a 2.0 3.0 4.5 ? ? ? 0.0 0.0 0.0 0.1 0.1 0.1 ? ? ? 0.1 0.1 0.1 low-level output voltage v ol v in = v ih or v il i ol = 12 ma i ol = 24 ma i ol = 75 ma (note) 3.0 4.5 5.5 ? ? ? ? ? ? 0.36 0.36 ? ? ? ? 0.44 0.44 1.65 v input leakage current i in v in = v cc or gnd 5.5 ? ? 0.1 ? 1.0 a quiescent supply current i cc v in = v cc or gnd 5.5 ? ? 8.0 ? 80.0 a note: this spec indicates the capability of driving 50
transmission lines. one output should be tested at a ti me for a 10 ms maximum duration.
tc74ac138p/f/fn/ft 2007-10-01 5 ac characteristics (c l = 50 pf, r l = 500 ?, input: t r = t f = 3 ns) ta = 25c ta = 40 to 85c characteristics symbol test condition v cc (v) min typ. max min max unit propagation delay time (a, b, c- y) t plh t phl ? 3.3 0.3 5.0 0.5 ? ? 8.5 6.4 14.2 9.2 1.0 1.0 16.3 10.5 ns propagation delay time (g1- y) t plh t phl ? 3.3 0.3 5.0 0.5 ? ? 7.5 6.1 12.8 8.9 1.0 1.0 14.7 10.2 ns propagation delay time ( 2 g- y) t plh t phl ? 3.3 0.3 5.0 0.5 ? ? 8.8 7.2 15.0 10.5 1.0 1.0 17.3 12.0 ns input capacitance c in ? ? 5 10 ? 10 pf power dissipation capacitance c pd (note) ? 143 ? ? ? 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
tc74ac138p/f/fn/ft 2007-10-01 6 package dimensions weight: 1.00 g (typ.)
tc74ac138p/f/fn/ft 2007-10-01 7 package dimensions weight: 0.18 g (typ.)
tc74ac138p/f/fn/ft 2007-10-01 8 package dimensions (note) note: this package is not available in japan. weight: 0.13 g (typ.)
tc74ac138p/f/fn/ft 2007-10-01 9 package dimensions weight: 0.06 g (typ.)
tc74ac138p/f/fn/ft 2007-10-01 10 restrictions on product use 20070701-en general ? the information contained herein is subject to change without notice. ? toshiba is continually working to improve the quality and reliability of its products. nevertheless, semiconductor devices in general can malfunction or fail due to their inherent electrical sensitivity a nd vulnerability to physical stress. it is the responsibility of the buyer, when utilizing toshiba produc ts, to comply with the standards of safety in making a safe design for the entire system, and to avoid situations in which a malfunction or failure of such toshiba products could cause loss of human life, bodily injury or damage to property. in developing your designs, please ensure that toshiba products are used within specified operating ranges as set forth in the most recent toshib a products specifications. also, please keep in mind the precautions and conditions set forth in the ?handling guide for semiconduct or devices,? or ?toshiba semiconductor reliability handbook? etc. ? the toshiba products listed in this document are in tended for usage in general electronics applications (computer, personal equipment, office equipment, measuri ng equipment, industrial robotics, domestic appliances, etc.).these toshiba products are neither intended nor warranted for usage in equipment that requires extraordinarily high quality and/or reliability or a malfuncti on or failure of which may cause loss of human life or bodily injury (?unintended usage?). unintended usage incl ude atomic energy control instruments, airplane or spaceship instruments, transportation instruments, traffic signal instruments, combustion control instruments, medical instruments, all types of safety devices, et c.. unintended usage of toshiba products listed in his document shall be made at the customer?s own risk. ? the products described in this document shall not be used or embedded to any downstream products of which manufacture, use and/or sale are prohibited under any applicable laws and regulations. ? the information contained herein is presented only as a guide for the applications of our products. no responsibility is assumed by toshiba for any infringement s of patents or other rights of the third parties which may result from its use. no license is granted by implic ation or otherwise under any patents or other rights of toshiba or the third parties. ? please contact your sales representative for product- by-product details in this document regarding rohs compatibility. please use these products in this document in compliance with all applicable laws and regulations that regulate the inclusion or use of controlled substances. toshiba assumes no liability for damage or losses occurring as a result of noncompliance with applicable laws and regulations.
|
