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tc74lcx240f/ft/fk 2010-01-31 1 toshiba cmos digital integrat ed circuit silicon monolithic tc74lcx240f,tc74lcx240ft,tc74lcx240fk low-voltage octal bus buffer (invert ed) with 5-v tolerant inputs and outputs the tc74lcx240 is a high-performance cmos octal bus buffer. designed for use in 3.3-v systems, 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 both inputs and outputs. the 74lcx240f/ft is an inverting 3-state buffer having two active-low output enables. this device is designed to be used with 3-state memory addr ess drivers, etc. 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 = 6.5 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.) 240 type weight sop20-p-300-1.27a : 0.22 g (typ.) tssop20-p-0044-0.65a : 0.08 g (typ.) vssop20-p-0030-0.50 : 0.03 g (typ.) note: the electrical characteristics of v cc =1.80.15v is only applicable fo r products which manufactured from january 2009 onward. tc74lcx240f tc74lcx240ft tc74lcx240fk
tc74lcx240f/ft/fk 2010-01-31 2 pin assignment (top view) iec logic symbol truth table inputs oe a n outputs l l h l h l h x z x: don?t care z: high impedance 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 applic ation of high temperature/current/voltage and the significant change in temperature, etc.) may cause this product to decr ease in the reliability significantly even if the operating conditions (i.e . operating temperature/current/volta ge, 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: output in off state note 3: high or low state. i out absolute maximum rating must be observed. note 4: v out < gnd, v out > v cc v cc 20 oe2 1y1 2a4 2y1 2a3 19 18 17 16 15 14 oe1 1 2 3 4 5 6 7 1a1 4y2 1a2 3y2 1a3 2y2 3y1 8 9 10 1a4 1y 2 gnd 13 12 11 2a2 4y1 2a1 1 2 4 6 8 19 11 13 15 17 18 16 14 12 en en 9 7 5 3 1a1 1a2 1a3 1a4 2a1 2a2 2a3 2a4 1y1 2y1 3y1 4y1 1y2 2y2 3y2 4y2 oe1 oe2
tc74lcx240f/ft/fk 2010-01-31 3 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: output in off state 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
tc74lcx240f/ft/fk 2010-01-31 4 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 3-state output off state current i oz v in = v ih or v il v out = 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 /v out = 3.6 to 5.5 v 1.65 to 3.6 ? 10.0 increase in i cc per input i cc v ih = v cc ? 0.6 v 2.7 to 3.6 ? 500 a
tc74lcx240f/ft/fk 2010-01-31 5 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 ? 8.5 2.7 ? 7.5 propagation delay time t plh t phl figure 1, figure 2 3.3 0.3 1.5 6.5 ns 1.8 0.15 ? 32.0 2.5 0.2 ? 16.0 2.7 ? 9.0 output enable time t pzl t pzh figure 1, figure 3 3.3 0.3 1.5 8.0 ns 1.8 0.15 ? 30.0 2.5 0.2 ? 15.0 2.7 ? 8.0 output disable time t plz t phz figure 1, figure 3 3.3 0.3 1.5 7.0 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 ? 3.3 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. average operating current can be obtained by the equation: i cc (opr) = c pd ?v cc ?f in + i cc /8 (per bit)
tc74lcx240f/ft/fk 2010-01-31 6 ac test circuit open 6.0 v or v cc 2 gnd switch output measure parameter switch t plh , t phl open 6.0 v @ v cc =3.30.3v @ v cc =2.7v t plz , t pzl v cc 2 @ v cc =2.50.2v @ v cc =1.80.15v t phz , t pzh gnd r l r l c l figuare 1
tc74lcx240f/ft/fk 2010-01-31 7 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 v om 1.5v v oh /2 v oh /2 v x v ol +0.3v v ol +0.15v v ol +0.15v output v y v oh -0.3v v oh -0.15v v oh -0.15v c l 50pf 30pf 30pf load r l 500 500 1k figure 3 t plz , t phz , t pzl , t pzh 90% 10% v ol v oh gnd v ih v om t phz t pzh t r t f v im gnd v oh outputs enabled v om t plz t pzl v x v y outputs disabled outputs enabled output enable ( oe ) output ( y) low to off to low output ( y) high to off to high figure 2 t plh , t phl output ( y) input (a) v ol v oh v om t plh t phl 90% 10% gnd v ih t f t r v im
tc74lcx240f/ft/fk 2010-01-31 8 package dimensions weight: 0.22 g (typ.)
tc74lcx240f/ft/fk 2010-01-31 9 package dimensions weight: 0.08 g (typ.)
tc74lcx240f/ft/fk 2010-01-31 10 package dimensions weight: 0.03 g (typ.)
tc74lcx240f/ft/fk 2010-01-31 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 a nd 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 reproduction 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 applicat ion 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) eval uating and determining the applicability of any info rmation 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 intended for use in general el ectronics applications (e.g., computers, personal equipment, office equipment, measur ing equipment, industrial robots and home electroni cs appliances) or for specif ic applications as expre ssly stated in this document . product is neither intended nor warranted for use in equipment or systems that require extraordinarily high levels of quality a nd/or reliability and/or a malfunction or failure of which may cause loss of human life, bodily injury, serious property damage or se rious public impact (?unintended use?). unintended use includes, without limitation, equipment used in nuclear facilities, equipment used in the aerospace industry, medical equipment, equipment used for automobiles, trains, ships and other transportation, traffic s ignaling equipment, equipment used to control combustions or explosions, safety dev ices, elevators and escalators, devices related to el ectric power, and equipment used in finance-related fields. do not use product for unintended use unless specifically permitted in thi s document. ? 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 pres ented 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 document, 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 so ftware or technology for any military purposes, including without limitation, for the design, development, use, stockpiling or m anufacturing 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 japanese foreign exchange and foreign trade law and the u.s. expor t administration regulations. ex port and re-export of product or related software or technology are strictly prohibited exc ept in compliance with all applic able 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 inclus ion 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 o f noncompliance with applicable laws and regulations.

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