tc74lcx257f/fn/ft 2002-01-11 1 toshiba cmos digital integrated circuit silicon monolithic tc74lcx257f,tc74lcx257fn,TC74LCX257FT low-voltage quad 2-channel multiplexer (3-state) with 5-v tolerant inputs and outputs the tc74lcx257f/fn/ft is a high-performance cmos multiplexer. designed for use in 3.3-v systems, it achieves high-speed operation while maintaining the 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 inputs. it is composed of four independent 2-channel multiplexers with common select and oe. if oe is set low, the outputs are held in a high-impedance state. when select is set low, ?a? data inputs are enabled. conversely, when select is high, ?b? data inputs are enabled. all inputs are equipped with protection circuits against static discharge. features low-voltage operation: v cc = 2.0 to 3.6 v high-speed operation: t pd = 6.0 ns (max) (v cc = 3.0 to 3.6 v) output current: |i oh |/i ol = 24 ma (min) (v cc = 3.0 v) latch-up performance: 500 ma available in jedec sop, jeita sop and tssop power-down protection provided on all inputs and outputs pin and function compatible with the 74 series (74ac/vhc/hc/f/als/ls etc.) 257 type note: xxxfn (jedec sop) is not available in japan. tc74lcx257f tc74lcx257fn TC74LCX257FT weight sop16-p-300-1.27: 0.18 g (typ.) sol16-p-150-1.27: 0.12 g (typ.) tssop16-p-0044-0.65: 0.06 g (typ.)
tc74lcx257f/fn/ft 2002-01-11 2 pin assignment (top view) iec logic symbol truth table inputs outputs oe select a b y h x x x z l l l x l l l h x h l h x l l l h x h h x: don?t care z: high impedance system diagram v cc 16 oe 4a 4b 4y 3a 15 14 13 12 11 10 select 1 2 3 4 5 6 7 1a 1b 1y 2a 2b 2y 3b 8 gnd 9 3y select 1a 2 a 1b 2b 3 a 3b 4 a 4b oe 1 2 3 5 6 11 10 14 13 15 12 4y 9 3y 7 2y 4 1y (13) (15) (11) (1) (3) (2) (6) (5) 1y 3a select 1b 1a 2b 2a 3b 4a 4b (10) (14) en g1 1 1 mux (9) (4) (7) (12) 2y 3y 4y oe
tc74lcx257f/fn/ft 2002-01-11 3 maximum ratings 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 1) dc output voltage v out 0.5 to v cc 0.5 (note 2) v input diode current i ik 50 ma output diode current i ok 50 (note 3) 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: output in off state note 2: high or low state. i out absolute maximum rating must be observed. note 3: v out gnd, v out v cc recommended operating conditions characteristics symbol rating unit 2.0 to 3.6 power supply voltage v cc 1.5 to 3.6 (note 4) v input voltage v in 0 to 5.5 v 0 to 5.5 (note 5) output voltage v out 0 to v cc (note 6) v 24 (note 7) output current i oh /i ol 12 (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 4: data retention only note 5: output in off state note 6: high or low state note 7: v cc 3.0 to 3.6 v note 8: v cc 2.7 to 3.0 v note 9: v in 0.8 to 2.0 v, v cc 3.0 v
tc74lcx257f/fn/ft 2002-01-11 4 electrical characteristics dc characteristics (ta 40 to 85c) 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 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 2.7 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 2.7 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 2.7 to 3.6 10.0 quiescent supply current i cc v in /v out 3.6 to 5.5 v 2.7 to 3.6 10.0 increase in icc per input i cc v ih v cc 0.6 v 2.7 to 3.6 500 a ac characteristics (ta 40 to 85c) characteristics symbol test condition v cc (v) min max unit 2.7 6.5 propagation delay time (a, b-y) t plh t phl figure 1, figure 2 3.3 0.3 1.5 6.0 ns 2.7 8.5 propagation delay time (select-y) t plh t phl figure 1, figure 2 3.3 0.3 1.5 7.0 ns 2.7 8.5 output enable time t pzl t pzh figure 1, figure 3 3.3 0.3 1.5 7.0 ns 2.7 6.0 output disable time t plz t phz figure 1, figure 3 3.3 0.3 1.5 5.5 ns 2.7 output to output skew t oslh t oshl (note 10) 3.3 0.3 1.0 ns note 10: parameter guaranteed by design. (t oslh |t plhm t plhn |, t oshl |t phlm t phln |)
tc74lcx257f/fn/ft 2002-01-11 5 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 11) 3.3 25 pf note 11: 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 ac test circuit ac waveform figure 2 t plh , t phl 90% 10% non-inverting output input v ol v oh gnd 2.7 v 1.5 v t plh t phl t r 2.5 ns t f 2.5 ns 1.5 v inverting output v ol v oh 1.5 v t phl t plh open 6.0 v gnd switch output measure r l 500 c l 50 pf parameter switch t plh , t phl open t plz , t pzl 6.0 v t phz , t pzh gnd r l r l c l figure 1
tc74lcx257f/fn/ft 2002-01-11 6 figure 3 t plz , t phz , t pzl , t pzh 90% 10% v ol 3.0 v gnd 2.7 v 1.5 v t phz t pzh t r 2.5 ns t f 2.5 ns 1.5 v gnd v oh outputs enabled 1.5 v t plz t pzl v ol 0.3 v v oh 0.3 v outputs disabled outputs enabled output enable ( oe ) output (y) low to off to low output (y) high to off to high
tc74lcx257f/fn/ft 2002-01-11 7 package dimensions weight: 0.18 g (typ.)
tc74lcx257f/fn/ft 2002-01-11 8 package dimensions weight: 0.12 g (typ.) note: this package is not available in japan.
tc74lcx257f/fn/ft 2002-01-11 9 package dimensions weight: 0.06 g (typ.)
tc74lcx257f/fn/ft 2002-01-11 10 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 utilizing 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 ?handling guide for semiconductor devices,? or ?toshiba semiconductor reliability handbook? etc.. 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. the products described in this document are subject to the foreign exchange and foreign trade laws. the information contained herein is presented only as a guide for the applications of our products. no responsibility is assumed by toshiba corporation for any infringements of intellectual property or other rights of the third parties which may result from its use. no license is granted by implication or otherwise under any intellectual property or other rights of toshiba corporation or others. the information contained herein is subject to change without notice. 000707eb a restrictions on product use
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