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tc74ac240,244p/f/fw/ft 2006-02-01 1 toshiba cmos digital integrated circuit silicon monolithic tc74ac240p,tc74ac240f,tc74ac240fw,tc74ac240ft tc74ac244p,TC74AC244F,TC74AC244Fw,TC74AC244Ft octal bus buffer tc74ac240p/f/fw/ft inverted, 3-state outputs tc74ac244p/f/fw/ft non-inverted, 3-state outputs the tc74ac240 and 244 are advanced high speed cmos octal bus buffers fabricated with silicon gate and double-layer metal wiring c 2 mos technology. they achieve the high speed operation similar to equivalent bipolar schottky ttl while maintaining the cmos low power dissipation. the 74ac240 is an inverting 3-state buffer while the 74ac244 is non-inverting. both devices have two active-low output enables. these devices are designed to be used in such applications as 3-state memory address drivers. all inputs are equipped with protection circuits against static discharge or transient excess voltage. features ? high speed: t pd = 4.0 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 74f240/244 weight dip20-p-300-2.54a : 1.30 g (typ.) sop20-p-300-1.27a : 0.22 g (typ.) sop20-p-300-1.27 : 0.22 g (typ.) sol20-p-300-1.27 : 0.46 g (typ.) tssop20-p-0044-0.65a : 0.08 g (typ.) note: xxxfw (jedec sop) is not available in japan. tc74ac240p, tc74ac244p tc74ac240f, TC74AC244F tc74ac240fw, TC74AC244Fw tc74ac240ft, TC74AC244Ft .com .com .com 4 .com u datasheet
tc74ac240,244p/f/fw/ft 2006-02-01 2 pin assignment iec logic symbol truth table inputs outputs g an y n (244) n y (240) l l l h l h h l h x z z x: don?t care z: high impedance v cc 16 2a4 2 y 1 2a3 15 14 13 12 11 20 1 2 3 4 5 6 7 1a3 2 y 2 1a4 1 y 2 1a1 3 y 1 8 1 y 1 19 2a2 g 2 1a2 3 y 2 18 9 4 y 2 gnd 10 2a1 17 4 y 1 (top view) tc74ac240 g 1 v cc 16 2a4 15 14 13 12 11 20 1 2 3 4 5 6 7 2y2 1a4 1y3 8 1y1 19 2a2 g 2 1a2 18 9 2y4 gnd 10 2a1 17 1y4 (top view) tc74ac244 1y2 2a3 2y1 1a3 2y3 1a1 g 1 (1) (2) (6) (4) 1a2 1a4 1a3 (8) (18) (14) 2 y 1 4 y 1 (16) (12) 3 y 1 en g 1 1 y 1 1a1 tc74ac240 (19) (11) (15) (13) 2a2 2a4 2a3 (17) (9) (5) 2 y 2 4 y 2 (7) (3) 3 y 2 en g 2 1 y 2 2a1 (1) (2) (6) (4) 1a2 1a4 1a3 (8) (18) (14) 1y2 1y4 (16) (12) 1y3 en g 1 1y1 1a1 tc74ac244 (19) (11) (15) (13) 2a2 2a4 2a3 (17) (9) (5) 2y2 2y4 (7) (3) 2y3 en g 2 2y1 2a1 .com .com .com .com 4 .com u datasheet
tc74ac240,244p/f/fw/ft 2006-02-01 3 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 note1: exceeding any of the absolute maximum ratings, even briefly, lead to deterioration in ic performance or even destruction. note2: 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. recommended operating conditions (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 recommended operating conditions are required to ensure the normal operation of the device. unused inputs must be tied to either vcc or gnd. .com .com .com .com 4 .com u datasheet
tc74ac240,244p/f/fw/ft 2006-02-01 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 D 2.0 3.0 5.5 1.50 2.10 3.85 D D D D D D 1.50 2.10 3.85 D D D v low-level input voltage v il D 2.0 3.0 5.5 D D D D D D 0.50 0.90 1.65 D D D 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 D D D 1.9 2.9 4.4 D D D 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 D D D D D D D 2.48 3.80 3.85 D D D v i ol = 50 a 2.0 3.0 4.5 D D D 0.0 0.0 0.0 0.1 0.1 0.1 D D D 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 D D D D D D 0.36 0.36 D D D D 0.44 0.44 1.65 v 3-state output off-state current i oz v in = v ih or v il v out = v cc or gnd 5.5 D D 0.5 D 5.0 a input leakage current i in v in = v cc or gnd 5.5 D D 0.1 D 1.0 a quiescent supply current i cc v in = v cc or gnd 5.5 D D 8.0 D 80.0 a note: this spec indicates the capability of driving 50 ? transmission lines. one output should be tested at a time for a 10 ms maximum duration. .com .com .com .com 4 .com u datasheet
tc74ac240,244p/f/fw/ft 2006-02-01 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 (note 2) t plh t phl D 3.3 0.3 5.0 0.5 D D 6.3 4.8 10.5 7.0 1.0 1.0 12.0 8.0 ns propagation delay time (note 3) t plh t phl D 3.3 0.3 5.0 0.5 D D 7.0 5.2 11.4 7.5 1.0 1.0 13.0 8.5 ns output enable time t pzl t pzh D 3.3 0.3 5.0 0.5 D D 8.4 5.9 14.0 8.7 1.0 1.0 16.0 10.0 ns output disable time t plz t phz D 3.3 0.3 5.0 0.5 D D 6.4 5.5 10.5 7.9 1.0 1.0 12.0 9.0 ns input capacitance c in D D 5 10 D 10 pf output capacitance c out D D 10 D D D pf power dissipation capacitance c pd (note 1) D 30 D D D pf note 1: c pd is defined as the value of the internal equivalent capacitance which is calculated 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 /8 (per bit) note 2: for tc74ac240 only note 3: for tc74ac244 only .com .com .com .com 4 .com u datasheet
tc74ac240,244p/f/fw/ft 2006-02-01 6 package dimensions weight: 1.30 g (typ.) .com .com .com .com 4 .com u datasheet
tc74ac240,244p/f/fw/ft 2006-02-01 7 package dimensions weight: 0.22 g (typ.) .com .com .com .com 4 .com u datasheet
tc74ac240,244p/f/fw/ft 2006-02-01 8 package dimensions weight: 0.22 g (typ.) .com .com .com .com 4 .com u datasheet
tc74ac240,244p/f/fw/ft 2006-02-01 9 package dimensions (note) note: this package is not available in japan. weight: 0.46 g (typ.) .com .com .com .com 4 .com u datasheet
tc74ac240,244p/f/fw/ft 2006-02-01 10 package dimensions weight: 0.08 g (typ.) .com .com .com .com 4 .com u datasheet
tc74ac240,244p/f/fw/ft 2006-02-01 11 note: lead (pb)-free packages dip20-p-300-2.54a sop20-p- 300-1.27a tssop20-p-0044-0.65a restrictions on product use 060116eba ? the information contained herein is subject to change without notice. 021023_d ? 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 and vulnerability to physical stress. it is the responsibility of the buyer, when utiliz ing toshiba products, 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 toshiba products specifications. also, please keep in mind the precautions and conditions set forth in the ?handli ng guide for semiconductor devices,? or ?toshiba semiconductor reliability handbook? etc. 021023_a ? the toshiba products listed in this document are intended for usage in general electronics applications (computer, personal equipment, office equipment, measuring 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 malfunction or failure of which may cause loss of human life or bodily injury (?unintended usage?). unintended usage include atomic energy control instruments, airplane or spaceship instruments, transportation instruments, traffic signal instruments, combustion control instruments, medical instruments, all types of safety devices, etc. unintended usage of toshiba products listed in this document shall be made at the customer?s own risk. 021023_b ? 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. 060106_q ? the information contained herein is presented only as a guide for the applications of our products. no responsibility is assumed by toshiba for any infringements of patents or other rights of the third parties which may result from its use. no license is granted by implication or otherwise under any patent or patent rights of toshiba or others. 021023_c ? the products described in this document are subject to the foreign exchange and foreign trade laws. 021023_e .com .com .com 4 .com u datasheet

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