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tc74vcxh16646ft 2007-10-19 1 toshiba cmos digital integrat ed circuit silicon monolithic tc74vcxh16646ft low-voltage 16-bit bus transceiver/register with bushold the tc74vcxh16646ft is a high-performance cmos 16-bit bus transceiver/register. designed for use in 1.8-v, 2.5-v or 3.3-v systems, it achieves high-speed operation while maintaining the cmos low power dissipation. this device is bus transceiver with 3-state outputs, d-type flip-flops, and control circuitry arranged for multiplexed transmission of data directly from the internal registers. the a, b data inputs includ e active bushold circuitry, eliminating the need for external pull-up resistors to hold unused or floating data inputs at a valid logic level. all inputs are equipped with prot ection circuits against static discharge. features (note) ? low-voltage operation: v cc = 1.8 to 3.6 v ? bushold on data inputs eliminating the need for external pull-up/pull-down resistors ? high-speed operation : t pd = 2.9 ns (max) (v cc = 3.0 to 3.6 v) : t pd = 3.5 ns (max) (v cc = 2.3 to 2.7 v) : t pd = 7.0 ns (max) (v cc = 1.8 v) ? 3.6-v tolerant control inputs ? output current : i oh /i ol = 24 ma (min) (v cc = 3.0 v) : i oh /i ol = 18 ma (min) (v cc = 2.3 v) : i oh /i ol = 6 ma (min) (v cc = 1.8 v) ? latch-up performance: ? 300 ma ? esd performance: machine model 200 v human body model 2000 v ? package: tssop note: do not apply a signal to any bus pins when it is in the output mode. damage may result. weight: 0.25 g (typ.)
tc74vcxh16646ft 2007-10-19 2 pin assignment (top view) iec logic symbol 2sab 1a2 1a3 1a4 1a5 1a6 1a7 1a8 2a2 2a3 2a4 2a5 2a6 2a7 2a8 2a1 1b3 1b5 1b7 1b2 1b4 1b6 1b8 1b1 2b3 2b5 2b7 2b2 2b4 2b6 2b8 2b1 16 17 19 20 21 23 24 41 40 38 37 36 34 33 8 9 10 12 13 14 15 51 48 47 45 44 43 42 6 49 2cab 2sba 2cba 1sab 1cab 1sba 1cba 1dir 2dir 1a1 26 31 27 30 2 55 3 54 28 29 1 56 5 52 g3 3en1 (ba) 3en2 (ab) c4 g5 c6 g7 g10 10en8 (ba) 10en9 (ab) c11 g12 c13 g14 > 1 1 5 4d 5 1 > 1 2 6d 7 1 7 > 1 8 12 11d > 1 9 13d 14 12 1 14 1 oe2 oe1 oe1 56 1cba 1sba gnd 1b1 1b2 55 54 53 52 51 50 1dir 1 2 3 4 5 6 7 1cab 1sab gnd 1a1 1a2 v cc v cc 8 1a3 49 1b3 9 10 11 12 48 47 46 45 gnd 1a6 1a5 1a4 1b6 gnd 1b5 1b4 13 14 15 16 17 18 19 20 21 22 23 24 2a7 2a8 25 26 27 28 gnd 2sab 2cab 2dir 1b7 44 1b8 2b1 2b3 gnd 43 42 41 40 39 38 2b4 37 2b5 36 35 34 33 2b8 2b7 v cc 2b6 32 31 30 29 oe2 2cba 2sba gnd 1a7 1a8 2a1 2a2 2a4 2a5 gnd 2a3 2a6 v cc 2b2
tc74vcxh16646ft 2007-10-19 3 truth table control inputs bus oe dir cab cba sab sba a b function input input x * x * x x z z the output functions of a and b busses are disabled. h x x x x x both a and b busses are used as inputs to the internal flip-flops. data on the bus will be stored on the rising edge of the clock. input output l l x * x * l x h h the data on the a bus are displayed on the b bus. l l x * l x h h the data on the a bus are displayed on the b bus, and are stored into the a storage flip-flops on the rising edge of cab. x * x * h x x qn the data in the a storage flop-flops are displayed on the b bus. l l l h x * h x h h the data on the a bus are stored into the a storage flip-flops on the rising edge of cab, and the stored data propagate directly onto the b bus. output input l l x * x * x l h h the data on the b bus are displayed on the a bus. l l x * x l h h the data on the b bus are displayed on the a bus, and are stored into the b storage flip-flops on the rising edge of cba. x * x * x h qn x the data in the b storage flip-flops are displayed on the a bus. l l l l x * x h h h the data on the b bus are stored into the b storage flip-flops on the rising edge of cba, and the stored data propagate directly onto the a bus. x: don?t care z: high impedance q n : the data stored into the internal flip-flops by most recent low to high transition of the clock inputs. * : the clocks are not internally with either oe or dir. therefore, data on the a and/or b busses may be clocked into the storage flip-flops at any time.
tc74vcxh16646ft 2007-10-19 4 system diagram b d q ck q d ck 1b8 1cba 1sba 1b1 52 43 55 54 14 2 3 1a8 1cab 1sab 1a1 56 1 5 same as above block a b a a a b b oe1 1dir b d q ck q d ck 2b8 2cba 2sba 2b1 42 33 30 31 24 27 26 2a8 2cab 2sab 2a1 29 28 15 same as above block a b a a a b b oe2 2dir
tc74vcxh16646ft 2007-10-19 5 timing chart absolute maximum ratings (note 1) characteristics symbol rating unit power supply voltage v cc 0.5 to 4.6 v (dir, oe , cab, cba, sab, sba) 0.5 to 4.6 dc input voltage (an, bn) v in 0.5 to v cc 0.5 (note 2) v dc output voltage (an, bn) v out 0.5 to v cc 0.5 (note 3) v input diode current i ik 50 ma output diode current i ok r 50 (note 4) ma output current i out r 50 ma power dissipation p d 400 mw dc v cc /ground current per supply pin i cc /i gnd r 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 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: 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 a : input b: output a : output b: input a : z b: z oe dir sab sba cab cba a b : don?t care z: high impedance
tc74vcxh16646ft 2007-10-19 6 operating ranges (note 1) (note 2) characteristics symbol rating unit 1.8 to 3.6 power supply voltage v cc 1.2 to 3.6 (note 3) v (dir, oe , cab, cba, sab, sba) ? 0.3 to 3.6 input voltage (an, bn) v in 0 to v cc (note 4) v output voltage (an, bn) v out 0 to v cc (note 5) v 24 (note 6) 18 (note 7) output current i oh /i ol 6 (note 8) ma operating temperature t opr ? 40 to 85 c input rise and fall time dt/dv 0 to 10 (note 9) 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 vcc or gnd. note 2: floating or unused control inputs must be held high or low. note 3: data retention only note 4: off state note 5: high or low state note 6: v cc = 3.0 to 3.6 v note 7: v cc = 2.3 to 2.7 v note 8: v cc = 1.8 v note 9: v in = 0.8 to 2.0 v, v cc = 3.0 v
tc74vcxh16646ft 2007-10-19 7 electrical characteristics dc characteristics (ta = ? 40 to 85c, 2.7 v < v cc < = 3.6 v) characteristics symbol test condition v cc (v) min max unit h-level v ih ? 2.7 to 3.6 2.0 ? input voltage l-level v il ? 2.7 to 3.6 ? 0.8 v i oh = ? 100 a 2.7 to 3.6 v cc ? 0.2 ? 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 2.7 to 3.6 ? 0.2 i ol = 12 ma 2.7 ? 0.4 i ol = 18 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 (dir, oe , cab, cba, sab, sba) i in v in = 0 to 3.6 v 2.7 to 3.6 ? 5.0 a v in = 0.8 v 3.0 75 ? bushold input minimum drive hold current i i (hold) v in = 2.0 v 3.0 ? 75 ? a (note 1) 3.6 ? 450 bushold input over-drive current to change state i i (od) (note 2) 3.6 ? ? 450 a 3-state output off state current i oz v in = v ih or v il v out = v cc or gnd 2.7 to 3.6 ? 10.0 a quiescent supply current i cc v in = v cc or gnd 2.7 to 3.6 ? 20.0 a increase in i cc per input i cc v ih = v cc ? 0.6 v 2.7 to 3.6 ? 750 a note 1: an external driver must source at least the specified current to switch from low-to-high. note 2: an external driver must sink at least the specified current to switch from high-to-low.
tc74vcxh16646ft 2007-10-19 8 dc characteristics (ta = ? 40 to 85c, 2.3 v < = v cc < = 2.7 v) characteristics symbol test condition v cc (v) min max unit h-level v ih ? 2.3 to 2.7 1.6 ? input voltage l-level v il ? 2.3 to 2.7 ? 0.7 v i oh = ? 100 a 2.3 to 2.7 v cc ? 0.2 ? i oh = ? 6 ma 2.3 2.0 ? i oh = ? 12 ma 2.3 1.8 ? h-level v oh v in = v ih or v il i oh = ? 18 ma 2.3 1.7 ? i ol = 100 a 2.3 to 2.7 ? 0.2 i ol = 12 ma 2.3 ? 0.4 output voltage l-level v ol v in = v ih or v il i ol = 18 ma 2.3 ? 0.6 v input leakage current (dir, oe , cab, cba, sab, sba) i in v in = 0 to 3.6 v 2.3 to 2.7 ? 5.0 a v in = 0.7 v 2.3 45 ? bushold input minimum drive hold current i i (hold) v in = 1.6 v 2.3 ? 45 ? a (note 1) 2.7 ? 300 bushold input over-drive current to change state i i (od) (note 2) 2.7 ? ? 300 a 3-state output off state current i oz v in = v ih or v il v out = v cc or gnd 2.3 to 2.7 ? 10.0 a quiescent supply current i cc v in = v cc or gnd 2.3 to 2.7 ? 20.0 a note 1: an external driver must source at least the specified current to switch from low-to-high. note 2: an external driver must sink at least the specified current to switch from high-to-low.
tc74vcxh16646ft 2007-10-19 9 dc characteristics (ta = ? 40 to 85c, 1.8 v < = v cc < 2.3 v) characteristics symbol test condition v cc (v) min max unit h-level v ih ? 1.8 to 2.3 0.7 v cc ? input voltage l-level v il ? 1.8 to 2.3 ? 0.2 v cc v i oh = ? 100 a 1.8 v cc ? 0.2 ? h-level v oh v in = v ih or v il i oh = ? 6 ma 1.8 1.4 ? i ol = 100 a 1.8 ? 0.2 output voltage l-level v ol v in = v ih or v il i ol = 6 ma 1.8 ? 0.3 v input leakage current (dir, oe , cab, cba, sab, sba) i in v in = 0 to 3.6 v 1.8 ? 5.0 a v in = 0.36 v 1.8 25 ? bushold input minimum drive hold current i i (hold) v in = 1.26 v 1.8 ? 25 ? a (note 1) 1.8 ? 200 bushold input over-drive current to change state i i (od) (note 2) 1.8 ? ? 200 a 3-state output off state current i oz v in = v ih or v il v out = v cc or gnd 1.8 ? 10.0 a quiescent supply current i cc v in = v cc or gnd 1.8 ? 20.0 a note 1: an external driver must source at least the specified current to switch from low-to-high. note 2: an external driver must sink at least the specified current to switch from high-to-low.
tc74vcxh16646ft 2007-10-19 10 ac characteristics (ta = ? 40 to 85c, input: t r = t f = 2.0 ns, c l = 30 pf, r l = 500 ) (note 1) characteristics symbol test condition v cc (v) min max unit 1.8 100 ? 2.5 0.2 200 ? maximum clock frequency f max figure 1, figure 3 3.3 0.3 250 ? mhz 1.8 1.5 7.0 2.5 0.2 0.8 3.5 propagation delay time (an, bn-bn, an) t plh t phl figure 1, figure 2 3.3 0.3 0.6 2.9 ns 1.8 1.5 8.8 2.5 0.2 0.8 4.4 propagation delay time (cab, cba-bn, an) t plh t phl figure 1, figure 3 3.3 0.3 0.6 3.2 ns 1.8 1.5 8.8 2.5 0.2 0.8 4.4 propagation delay time (sab, sba-bn, an) t plh t phl figure 1, figure 2 3.3 0.3 0.6 3.5 ns 1.8 1.5 9.8 2.5 0.2 0.8 4.9 output enable time ( oe , dir-an, bn) t pzl t pzh figure 1, figure 4, figure 5 3.3 0.3 0.6 3.8 ns 1.8 1.5 7.6 2.5 0.2 0.8 4.2 output disable time ( oe , dir-an, bn) t plz t phz figure 1, figure 4, figure 5 3.3 0.3 0.6 3.7 ns 1.8 4.0 D 2.5 0.2 1.5 ? minimum pulse width t w (h) t w (l) figure 1, figure 3 3.3 0.3 1.5 ? ns 1.8 2.5 ? 2.5 0.2 1.5 ? minimum setup time t s figure 1, figure 3 3.3 0.3 1.5 ? ns 1.8 1.0 ? 2.5 0.2 1.0 ? minimum hold time t h figure 1, figure 3 3.3 0.3 1.0 ? ns 1.8 ? 0.5 2.5 0.2 ? 0.5 output to output skew t oslh t oshl (note 2) 3.3 0.3 ? 0.5 ns note 1: for c l = 50 pf, add approximately 300 ps to the ac maximum specification. note 2: parameter guaranteed by design. (t oslh = |t plhm ? t plhn |, t oshl = |t phlm ? t phln |)
tc74vcxh16646ft 2007-10-19 11 dynamic switching characteristics (ta = 25c, input: t r = t f = 2.0 ns, c l = 30 pf, r l = 500 ) characteristics symbol test condition v cc (v) typ. unit v ih = 1.8 v, v il = 0 v (note) 1.8 0.25 v ih = 2.5 v, v il = 0 v (note) 2.5 0.6 quiet output maximum dynamic v ol v olp v ih = 3.3 v, v il = 0 v (note) 3.3 0.8 v v ih = 1.8 v, v il = 0 v (note) 1.8 ? 0.25 v ih = 2.5 v, v il = 0 v (note) 2.5 ? 0.6 quiet output minimum dynamic v ol v olv v ih = 3.3 v, v il = 0 v (note) 3.3 ? 0.8 v v ih = 1.8 v, v il = 0 v (note) 1.8 1.5 v ih = 2.5 v, v il = 0 v (note) 2.5 1.9 quiet output minimum dynamic v oh v ohv v ih = 3.3 v, v il = 0 v (note) 3.3 2.2 v note: parameter guaranteed by design. capacitive characteristics (ta = 25c) characteristics symbol test condition v cc (v) typ. unit input capacitance c in (dir, oe , cab, cba, sab, sba) 1.8, 2.5, 3.3 6 pf bus i/o capacitance c i/o ? 1.8, 2.5, 3.3 7 pf power dissipation capacitance c pd f in = 10 mhz (note) 1.8, 2.5, 3.3 20 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 /16 (per bit)
tc74vcxh16646ft 2007-10-19 12 ac test circuit ac waveform figure 2 t plh , t phl 90% 10% output (bn, an) input (an, bn, sab, sba) v ol v oh v ih v m t plh t phl t r 2.0 ns v m gnd t f 2.0 ns figure 1 parameter switch t plh , t phl open t plz , t pzl 6.0 v @v cc = 3.3 0.3 v v cc 2 @v cc = 2.5 0.2 v @v cc = 1.8 v t phz , t pzh gnd 6.0 v or v cc 2 open gnd switch output measure c l = 30 pf r l = 500 r l r l c l figure 3 t plh , t phl , t w , t s , t h output (bn, an) 10% t r 2.0 ns 90% v m v ih gnd v m t s (h) t h (h) t h (l) t s (l) t w (h) t w (l) input (cab, cba) t f 2.0 ns v ih gnd input (an, bn) v m v oh v ol t plh t phl
tc74vcxh16646ft 2007-10-19 13 figure 5 t plz , t ph , t pz , t pzh v cc symbol 3.3 0.3 v 2.5 0.2 v 1.8 v v ih 2.7 v v cc v cc v m 1.5 v v cc /2 v cc /2 v x v ol + 0.3 v v ol + 0.15 v v ol + 0.15 v v y v oh ? 0.3 v v oh ? 0.15 v v oh ? 0.15 v 90% 10% v in gnd 3.0 v or v cc v ol v oh gnd 3.0 v or v cc v ol v oh gnd t f 2.0 ns t r 2.0 ns v m v m t phz t pzl v m v x v y t pzl t plz v m v x v y t pzh t phz t plz t pzh input (dir) output (an) output (an) output (bn) output (bn) v m 90% 10% v ol 3.0 v or v cc gnd 2.7 v v m t phz t pzh t r 2.0 ns t f 2.0 ns v m gnd v oh outputs enabled v m t plz t pzl v x v y outputs disabled outputs enabled output disable ( oe ) output (an, bn) low to off to low output (an, bn) high to off to high figure 4 t plz , t ph , t pz , t pzh
tc74vcxh16646ft 2007-10-19 14 package dimensions weight: 0.25 g (typ.)
tc74vcxh16646ft 2007-10-19 15 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.

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