tc74vhc125,126f/ft/fk 2012-02-29 1 toshiba cmos digital integrat ed ci rcuit silicon monolithic tc74vhc125f,tc74vhc125ft,tc74vhc125fk tc74vhc126f,tc74vhc126ft,tc74vhc126fk tc74vhc125f/ft/fk quad bus buffer tc74vhc126f/ft/fk quad bus buffer the tc74vhc125/126 are high speed cmos quad bus buffers fabricated with silicon gate c 2 mos technology. they achieve the high speed op eration similar to equivalent bipolar shottky ttl while maintaining the cmos low power dissipation. the tc74vhc125 requires the 3-state control input g to be set high to place the output in to the high impedance state, whereas the tc74vhc126 requires the control input g to be set low to place the output into high impedance. an input protection circuit en sures that 0 to 5.5 v can be applied to the input pins withou t regard to the supply voltage. this device can be used to interface 5 v to 3 v systems and two supply systems such as battery back up. this circuit prevents device destruction due to mismatched supply and input voltages. features ? high speed: t pd = 3.8 ns (typ.) at v cc = 5 v ? low power dissipation: i cc = 4 a (max) at ta = 25c ? high noise immunity: v nih = v nil = 28% v cc (min) ? power down protection is provided on all inputs. ? balanced propagation delays: t plh ? t phl ? wide operating voltage range: v cc (opr) = 2 to 5.5 v ? low noise: v olp = 0.8 v (max) ? pin and function compatible with 74als125/126 weight sop14-p-300-1.27a : 0.18 g (typ.) tssop14-p-0044-0.65a : 0.06 g (typ.) vssop14-p-0030-0.50 : 0.02 g (typ.) tc74vhc125f, tc74vhc126f tc74vhc125ft, tc74vhc126ft tc74vhc125fk, tc74vhc126fk
tc74vhc125,126f/ft/fk 2012-02-29 2 pin assignment iec logic symbol truth table tc74vhc125 inputs output g a y h x z l l l l h h x: don?t care z: high impedance tc74vhc126 inputs output g a y l x z h l l h h h x: don?t care z: high impedance v cc 9 4a 4y 8 14 13 12 11 10 g 1 1 2 3 4 5 6 7 2a 2y gnd 3a 3y (top view) 1a tc74vhc125 g2 g 4 g3 1y v cc 9 4a 4y 8 14 12 11 10 1 2 3 4 5 6 7 2a 2y gnd 3a 3y (top view) 1a 1y tc74vhc126 13 1g 2g 4g 3g (4) (10) (5) g2 en g3 2a (13) (9) (12) g4 3a (6) (8) (11) 2y 3y 4y 4a (1) (2) g1 1a (3) 1y tc74vhc125 (4) (10) (5) en 2a (13) (9) (12) 3a (6) (8) (11) 2y 3y 4y 4a (1) (2) 1a (3) 1y tc74vhc126 1g 2g 3g 4g
tc74vhc125,126f/ft/fk 2012-02-29 3 absolute maximum ratings (note) 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 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 20 ma dc output current i out 25 ma dc v cc /ground current i cc 50 ma power dissipation p d 180 mw storage temperature t stg ? 65 to 150 c note: 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). operating ranges (note) characteristics symbol rating unit supply voltage v cc 2.0 to 5.5 v input voltage v in 0 to 5.5 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.
tc74vhc125,126f/ft/fk 2012-02-29 4 electrical characteristics dc characteristics test condition ta = 25c ta = ? 40 to 85c characteristics symbol v cc (v) min typ. max min max unit high-level input voltage v ih D 2.0 3.0 to 5.5 1.50 v cc u 0.7 D D D D 1.50 v cc u 0.7 D D v low-level input voltage v il D 2.0 3.0 to 5.5 D D D D 0.50 v cc u 0.3 D D 0.50 v cc u 0.3 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 = ? 8 ma 3.0 4.5 2.58 3.94 D D D D 2.48 3.80 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 = 4 ma i ol = 8 ma 3.0 4.5 D D D D 0.36 0.36 D D 0.44 0.44 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 0.25 D 2.50 a input leakage current i in v in = 5.5 v or gnd 0 to 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 4.0 D 40.0 a
tc74vhc125,126f/ft/fk 2012-02-29 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 D 5.6 8.0 1.0 9.5 3.3 0.3 50 D 8.1 11.5 1.0 13.0 15 D 3.8 5.5 1.0 6.5 propagation delay time t plh t phl D 5.0 0.5 50 D 5.3 7.5 1.0 8.5 ns 15 D 5.4 8.0 1.0 9.5 3.3 0.3 50 D 7.9 11.5 1.0 13.0 15 D 3.6 5.1 1.0 6.0 output enable time t pzl t pzh r l = 1 k ? 5.0 0.5 50 D 5.1 7.1 1.0 8.0 ns 3.3 0.3 50 D 9.5 13.2 1.0 15.0 output disable time t plz t phz r l = 1 k ? 5.0 0.5 50 D 6.1 8.8 1.0 10.0 ns 3.3 0.3 50 D D 1.5 D 1.5 output to output skew t oslh t oshl (note 1) 5.0 0.5 50 D D 1.0 D 1.0 ns input capacitance c in D D 4 10 D 10 pf output capacitance c out D D 6 D D D pf tc74vhc125 D 14 D D D power dissipation capacitance (note 2) c pd tc74vhc126 D 15 D D D 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 equival ent 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 /4 (per gate) 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 5.0 0.3 0.8 v quiet output minimum dynamic v ol v olv c l = 50 pf 5.0 ? 0.3 ? 0.8 v minimum high level dynamic input voltage v ihd c l = 50 pf 5.0 D 3.5 v maximum low level dynamic input voltage v ild c l = 50 pf 5.0 D 1.5 v
tc74vhc125,126f/ft/fk 2012-02-29 6 input equivalent circuit input
tc74vhc125,126f/ft/fk 2012-02-29 7 package dimensions weight: 0.18 g (typ.)
tc74vhc125,126f/ft/fk 2012-02-29 8 package dimensions weight: 0.06 g (typ.)
tc74vhc125,126f/ft/fk 2012-02-29 9 package dimensions weight: 0.02 g (typ.)
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