tc74vhcv240,244ft/fk 2014-03-01 1 toshiba cmos digital integrat ed ci rcuit silicon monolithic TC74VHCV240FT, tc74vhcv240fk tc74vhcv244ft, tc74vhcv244fk octal schmitt bus buffer TC74VHCV240FT/fk inverted, 3-state outputs tc74vhcv244ft/fk non-inverted, 3-state outputs the tc74vhcv240 and 244 are advanced high speed cmos octal bus buffers fabricated with silicon gate cmos technology. they achieve the high speed op eration similar to equivalent bipolar schottky ttl while main taining the cmos low power dissipation. the 74vhcv240 is an inverting 3-state buffer having two active-low output enables. the tc74vhcv244 is a non-inverting 3-state buffer, and has two active-low output enables. input pin have hysteresis be tween the positive-going and negative-going thresholds. thus the tc74vhcv240 and 244 are capable of squaring up transiti ons of slowly changing input signals and provides an improved noise immunity. input protection and output circuit ensure that 0 to 5.5 v can be applied to the input and output (note) pins without regard to the supply voltage. these structure pr events device destruction due to mismatched supply and input/ou tput voltages such as battery back up, etc. note: output in off-state features ? high speed: t pd = 3.9 ns (typ.) at v cc = 5 v ? low power dissipation: i cc = 2 a (max) at ta = 25c ? wide operating voltage range: v cc (opr) = 1.8 v to 5.5 v ? ouput current: |i oh |/i ol = 16 ma (min) (v cc = 4.5 v) ? available in 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.) 240/244 type TC74VHCV240FT, tc74vhcv244ft tc74vhcv240fk, tc74vhcv244fk weight tssop20-p-0044-0.65a : 0.08 g ( typ.) vssop20-p-0030-0.50 : 0.03 g ( typ.) start of commercial production 2009-12
tc74vhcv240,244ft/fk 2014-03-01 2 pin assignment truth table inputs outputs g a n y n n y l l l h l h h l h x z z x: don?t care z: high impedance y n : tc74vhcv244 n y : tc74vhcv240 v cc 16 2a4 2y1 2a3 15 14 13 12 11 20 1 2 3 4 5 6 7 1a3 2y 2 1a4 1y 2 1a1 3y1 8 1y1 19 2a2 g2 1a2 3y 2 18 9 4y 2 gnd 10 2a1 17 4y1 (top view) g 1 tc74vhcv240 v cc 16 2a4 15 14 13 12 11 20 1 2 3 4 5 6 7 2y2 1a4 1y3 8 1y1 19 2a2 g2 1a2 18 9 2y4 gnd 10 2a1 17 1y4 (top view) 1y2 2a3 2y1 1a3 2y3 1a1 g1 tc74vhcv244
tc74vhcv240,244ft/fk 2014-03-01 3 absolute maximum ratings (note1) characteristics symbol rating unit supply voltage range 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 r 50 (note 4) ma dc output current i out r 50 ma power dissipation p d 180 mw dc v cc /ground current 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: 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 operating ranges (note1) characteristics symbol rating unit power supply voltage v cc 1.8 to 5.5 v input voltage v in 0 to 5.5 v 0 to 5.5 (note 2) output voltage v out 0 to v cc (note 3) v operating temperature t opr 40 to 85 c input rise and fall time dt/dv 0 to 20 (v cc = 3.3 r 0.3v) 0 to 1 (v cc = 5 r 0.5v) ms/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: output in off-state note 3: high or low state.
tc74vhcv240,244ft/fk 2014-03-01 4 electrical characteristics dc characteristics test condition ta = 25c ta = 40 to 85c characteristics symbol vcc (v) min typ. max min max unit positive threshold voltage v p ? 1.8 2.3 3.0 4.5 5.5 ? ? ? ? ? ? ? ? ? ? 1.65 1.85 2.20 3.15 3.85 ? ? ? ? ? 1.65 1.85 2.20 3.15 3.85 negative threshold voltage v n ? 1.8 2.3 3.0 4.5 5.5 0.15 0.45 0.90 1.35 1.65 ? ? ? ? ? ? ? ? ? ? 0.15 0.45 0.90 1.35 1.65 ? ? ? ? ? v hysteresis voltage v h ? 1.8 2.3 3.0 4.5 5.5 0.15 0.20 0.30 0.40 0.50 ? ? ? ? ? 1.05 1.10 1.20 1.40 1.60 0.15 0.20 0.30 0.40 0.50 1.05 1.10 1.20 1.40 1.60 v i oh = 50 a 1.8 3.0 4.5 1.7 2.9 4.4 1.8 3.0 4.5 ? ? ? 1.7 2.9 4.4 ? ? ? high-level output voltage v oh v in = v ih or v il i oh = 8 ma i oh = 16 ma 3.0 4.5 2.58 3.94 ? ? ? ? 2.48 3.80 ? ? i ol = 50 a 1.8 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 = 8 ma i ol = 16 ma 3.0 4.5 ? ? ? ? 0.36 0.44 ? ? 0.44 0.55 v 3-state output off-state current i oz v in = v ih or v il v out = 0 to 5.5v 1.8 to 5.5 ? ? 0.5 ? 5.0 a power-off leakage current i off v in /v out 5.5 v 0 ? ? 0.5 ? 5.0 a input leakage current i in v in = 5.5 v or gnd 0 to 5.5 ? ? 0.1 ? 1.0 a quiescent supply current i cc v in = v cc or gnd 5.5 ? ? 2.0 ? 20.0 a
tc74vhcv240,244ft/fk 2014-03-01 5 ac characteristics (input: t r = t f = 3 ns) test condition ta = 25c ta = ? 40 to 85c characteristics symbol v cc (v) c l (pf) min typ. max min max unit 15 ? 6.4 11.6 1.0 14.0 2.5 0.2 50 ? 9.2 14.4 1.0 17.0 15 ? 5.0 7.5 1.0 9.0 3.3 0.3 50 ? 7.0 11.0 1.0 12.5 15 ? 3.9 5.5 1.0 6.5 propagation delay time (tc74vhcv240) t plh t phl ? 5.0 0.5 50 ? 5.4 7.5 1.0 8.5 ns 15 ? 6.7 12.5 1.0 15.0 2.5 0.2 50 ? 9.5 15.3 1.0 18.0 15 ? 5.0 8.4 1.0 10.0 3.3 0.3 50 ? 7.2 11.9 1.0 13.5 15 ? 3.8 5.5 1.0 6.5 propagation delay time (tc74vhcv244) t plh t phl ? 5.0 0.5 50 ? 5.4 7.5 1.0 8.5 ns 15 ? 7.8 14.6 1.0 17.0 2.5 0.2 50 ? 11.1 17.8 1.0 21.0 15 ? 5.7 10.6 1.0 12.5 3.3 0.3 50 ? 8.4 14.1 1.0 16.0 15 ? 4.1 7.3 1.0 8.5 3-state output enable time t pzl t pzh r l = 1 k 5.0 0.5 50 ? 6.2 9.3 1.0 10.5 ns 2.5 0.2 50 ? 14.3 19.2 1.0 21.0 3.3 0.3 50 ? 10.9 14.0 1.0 16.0 3-state output disable time t plz t phz r l = 1 k 5.0 0.5 50 ? 8.7 9.2 1.0 10.5 ns 2.5 0.2 50 ? ? 2.0 ? 2.0 3.3 0.3 50 ? ? 1.5 ? 1.5 output to output skew t oslh t oshl (note 1) 5.0 0.5 50 ? ? 1.0 ? 1.0 ns input capacitance c in ? ? 4 10 ? 10 pf output capacitance c out ? ? 6 ? ? ? pf tc74vhcv240 ? 20 ? ? ? power dissipation capacitance (note 2) c pd tc74vhcv244 ? 21 ? ? ? pf note 1: parameter guaranteed by design. t oslh = |t plhm ? t plhn |, t oshl = |t phlm ? t phln | note 2: 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 / 8 (per bit)
tc74vhcv240,244ft/fk 2014-03-01 6 noise characteristics (input: t r = t f = 3 ns) test condition ta = 25c characteristics symbol v cc (v) typ. limit unit quiet output maximum dynamic v ol v olp c l = 50 pf 3.3 5.0 0.45 0.9 ? ? v quiet output minimum dynamic v ol v olv c l = 50 pf 3.3 5.0 ? 0.1 ? 0.3 ? ? v minimum high level dynamic input voltage v ihd c l = 50 pf 5.0 ? 3.5 v maximum low level dynamic input voltage v ild c l = 50 pf 5.0 ? 1.5 v
tc74vhcv240,244ft/fk 2014-03-01 7 package dimensions weight: 0.08 g (typ.)
tc74vhcv240,244ft/fk 2014-03-01 8 package dimensions weight: 0.03 g (typ.)
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