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tm 74lcx540 low voltage octal buffer/line driver with 5v tolerant inputs and outputs may 2007 ?1995 fairchild semiconductor corporation www.fairchildsemi.com 74lcx540 rev. 1.1 74lcx540 low voltage octal buffer/line driver with 5v tolerant inputs and outputs features 5v tolerant input and outputs 2.3v?.6v v cc speci?ations provided 6.5ns t pd max (v cc = 3.3v), 10 a i cc max po w er down high impedance inputs and outputs supports live insertion/withdrawal (1) implements patented noise/ emi reduction circuitry latch-up performance exceeds jedec 78 conditions esd performance ?human body model > 2000v ?machine model > 200v leadless pb-free dqfn package general description the lcx540 is an octal buffer/line driver designed to be employed as a memory and address driver, clock driver and bus oriented transmitter/receiver. this device is similar in function to the lcx240 while providing ?w-through architecture (inputs on opposite side from outputs). this pinout arrangement makes this device especially useful as an output port for micropro- cessors, allowing ease of layout and greater pc board density. the lcx540 is designed for low voltage (2.5v or 3.3v) v cc applications with capability of interfacing to a 5v signal environment. the lcx540 is fabricated with an advanced cmos technology to achieve high speed operation while maintaining cmos low power dissipa- tion. ordering information devices also available in tape and reel. specify by appending the suffix letter ??to the ordering code. pb-free package per jedec j-std-020b. notes: 1. to ensure the high impedance state during power up or down, oe should be tied to v cc through a pull-up resistor: the minimum value of the resistor is determined by the current-sourcing capability of the driver. 2. dqfn package available in tape and reel only. 3. ?nl?indicates pb-free package (per jedec j-std-020b). device available in tape and reel only. order number package number package description 74lcx540wm m20b 20-lead small outline integrated circuit (soic), jedec ms-013, 0.300" wide 74lcx540sj m20d 20-lead small outline package (sop), eiaj type ii, 5.3mm wide 74lcx540bqx (2) mlp020b pb-free 20-terminal depopulated quad very-thin flat pack no leads (dqfn), jedec mo-241, 2.5 x 4.5mm 74lcx540msa msa20 20-lead shrink small outline package (ssop), jedec mo-150, 5.3mm wide 74lcx540mtc mtc20 20-lead thin shrink small outline package (tssop), jedec mo-153, 4.4mm wide 74lcx540mtc_nl (3) mtc20 pb-free 20-lead thin shrink small outline package (tssop), jedec mo-153, 4.4mm wide
74lcx540 low voltage octal buffer/line driver with 5v tolerant inputs and outputs ?1995 fairchild semiconductor corporation www.fairchildsemi.com 74lcx540 rev. 1.1 2 connection diagrams pin assignments for soic, sop, ssop, tssop p ad assignment for dqfn (top view) pin descriptions logic symbol ieee/iec t ruth table h = high voltage level l = low voltage level x = immaterial z = high impedance pin names description oe 1 , oe 2 3-state output enable inputs i 0 ? 7 inputs o 0 ? 7 outputs i 1 i 2 i 3 i 4 i 5 i 6 i 7 gnd i 0 o 0 o 1 o 2 o 3 o 4 o 5 o 6 o 7 oe 2 v cc 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 oe 1 i 1 i 2 i 3 i 4 i 5 i 6 i 7 gnd i 0 o 0 o 1 o 2 o 3 o 4 o 5 o 6 o 7 oe 2 v cc 120 2 3 4 5 6 7 8 9 10 11 19 18 17 16 15 14 13 12 oe 1 inputs outputs oe 1 oe 2 io n l lhl hxxz xhxz lllh o 0 oe 1 oe 2 en & i 0 o 1 i 1 o 2 i 2 o 3 i 3 o 4 i 4 o 5 i 5 o 6 i 6 o 7 i 7
74lcx540 low voltage octal buffer/line driver with 5v tolerant inputs and outputs ?1995 fairchild semiconductor corporation www.fairchildsemi.com 74lcx540 rev. 1.1 3 absolute maximum ratings stresses exceeding the absolute maximum ratings may damage the device. the device may not function or be operable above the recommended operating conditions and stressing the parts to these levels is not recommended. in addition, extended exposure to stresses above the recommended operating conditions may affect device reliability. the absolute maximum ratings are stress ratings only. recommended operating conditions (5) the recommended operating conditions table de?es the conditions for actual device operation. recommended operating conditions are speci?d to ensure optimal performance to the datasheet speci?ations. fairchild does not recommend exceeding them or designing to absolute maximum ratings. notes: 4. i o absolute maximum rating must be observed. 5. unused inputs or i/o? must be held high or low. they may not float. symbol parameter conditions value units v cc supply voltage ? 0.5 to + 7.0 v v i dc input voltage ? 0.5 to + 7.0 v v o dc output voltage output in 3-state ? 0.5 to + 7.0 v output in high or low state (4) ? 0.5 to v cc + 0.5 i ik dc input diode current v i < gnd ? 50 ma i ok dc output diode current v o < gnd ? 50 ma v o > v cc + 50 i o dc output source/sink current 50 ma i cc dc supply current per supply pin 100 ma i gnd dc ground current per ground pin 100 ma t stg storage temperature ? 65 to + 150 c symbol parameter conditions min. max. units v cc supply voltage operating 2.0 3.6 v data retention 1.5 3.6 v i input voltage 0 5.5 v v o output voltage high or low state 0 v cc v 3-state 0 5.5 i oh / i ol output current v cc = 3.0v ? 3.6v 24 ma v cc = 2.7v ? 3.0v 12 v cc = 2.3v ? 2.7v 8 t a f ree-air operating temperature ? 40 85 c ? t / ? v input edge rate v in = 0.8v ?2.0v, v cc = 3.0v 0 10 ns / v
74lcx540 low voltage octal buffer/line driver with 5v tolerant inputs and outputs ?1995 fairchild semiconductor corporation www.fairchildsemi.com 74lcx540 rev. 1.1 4 dc electrical characteristics ac electrical characteristics notes: 6. outputs disabled or 3-state only. 7. skew is defined as the absolute value of the difference between the actual propagation delay for any two separate outputs of the same device. the specification applies to any outputs switching in the same direction, either high-to-low (t oshl ) or low-to-high (t oslh ). symbol parameter conditions v cc (v) t a = ? 40 c to + 85 c units min. max. v ih high level input voltage 2.3 ? 2.7 1.7 v 2.7 ? 3.6 2.0 v il low level input voltage 2.3 ? 2.7 0.7 v 2.7 ? 3.6 0.8 v oh high level output voltage i oh = ? 100 a 2.3 ? 3.6 v cc ?0.2 v i oh = ?ma 2.3 1.8 i oh = ? 12ma 2.7 2.2 i oh = ? 18ma 3.0 2.4 i oh = ? 24ma 3.0 2.2 v ol low level output voltage i ol = 100 a 2.3 ? 3.6 0.2 v i ol = 8ma 2.3 0.6 i ol = 12ma 2.7 0.4 i ol = 16ma 3.0 0.4 i ol = 24ma 3.0 0.55 i i input leakage current 0 v i 5.5v 2.3 ? 3.6 5.0 a i oz 3-state output voltage 0 v o 5.5v, v i = v ih or v il 2.3 ? 3.6 5.0 a i off po w er-off leakage current v i or v o = 5.5v 0 10 a i cc quiescent supply current v i = v cc or gnd 2.3 ? 3.6 10 a 3.6v v i , v o 5.5v (6) 2.3 ? 3.6 10 ? i cc increase in i cc per input v ih = v cc ?0.6v 2.3 ? 3.6 500 a symbol parameter t a = ? 40 c to + 85 c, r l = 500 ? units v cc = 3.3v 0.3v v cc = 2.7v v cc = 2.5v 0.2v c l = 50pf c l = 50pf c l = 30pf min. max. min. max. min. max. t phl , t plh propagation delay 1.5 6.5 1.5 7.5 1.5 7.8 ns t pzl , t pzh output enable time 1.5 8.5 1.5 9.5 1.5 10.5 ns t plz , t phz output disable time 1.5 7.5 1.5 8.5 1.5 9.0 ns t oshl , t oslh output to output skew (7) 1.0 ns
74lcx540 low voltage octal buffer/line driver with 5v tolerant inputs and outputs ?1995 fairchild semiconductor corporation www.fairchildsemi.com 74lcx540 rev. 1.1 5 dynamic switching characteristics capacitance symbol parameter conditions v cc (v) t a = 25 c units t ypical v olp quiet output dynamic peak v ol c l = 50pf, v ih = 3.3v, v il = 0v 3.3 0.8 v c l = 30pf, v ih = 2.5v, v il = 0v 2.5 0.6 v olv quiet output dynamic valley v ol c l = 50pf, v ih = 3.3v, v il = 0v 3.3 ? 0.8 v c l = 30pf, v ih = 2.5v, v il = 0v 2.5 ? 0.6 symbol parameter conditions typical units c in input capacitance v cc = open, v i = 0v or v cc 7pf c out output capacitance v cc = 3.3v, v i = 0v or v cc 8pf c pd po w er dissipation capacitance v cc = 3.3v, v i = 0v or v cc , f = 10 mhz 25 pf
74lcx540 low voltage octal buffer/line driver with 5v tolerant inputs and outputs ?1995 fairchild semiconductor corporation www.fairchildsemi.com 74lcx540 rev. 1.1 6 ac loading and waveforms (generic for lcx family) figure 1. ac test circuit (c l includes probe and jig capacitance) wa veform for inverting and non-inverting functions propagation delay, pulse width and t rec wa veforms 3-state output low enable and disable times for logic 3-state output high enable and disable times for logic setup time, hold time and recovery time for logic t rise and t fall figure 2. waveforms (input characteristics; f = 1mhz, t r = t f = 3ns) t est switch t plh , t phl open t pzl , t plz 6v at v cc = 3.3 0.3v v cc x 2 at v cc = 2.5 0.2v t pzh , t phz gnd v cc dut c l 500 ? 500 ? open t plh , t phl t pzh , t phz t pzl , t plz gnd v i test signal v cc gnd d ata in d ata out t pxx t pxx v mi v mo v cc gnd control in clock output t phl t plh t rec t w v mi v mi v mo v mo v cc v x v ol gnd d ata out output control t pzl t plz v mi v mo d ata in control input mr or clear t s t s t h t rec v cc gnd v cc gnd v mi v mi v mi any output t r t f v oh v ol 10% 10% 90% 90% symbol v cc 3.3v 0.3v 2.7v 2.5v 0.2v v mi 1.5v 1.5v v cc / 2 v mo 1.5v 1.5v v cc / 2 v x v ol + 0.3v v ol + 0.3v v ol + 0.15v v y v oh ? 0.3v v oh ? 0.3v v oh ? 0.15v d ata out output control t pzh t phz v cc gnd v mi v oh v y v mo
74lcx540 low voltage octal buffer/line driver with 5v tolerant inputs and outputs ?1995 fairchild semiconductor corporation www.fairchildsemi.com 74lcx540 rev. 1.1 7 schematic diagram (generic for lcx family) esd esd input stage output input stage p1 p2 p5 x1 gto v cc v dd n1 n+/p d2 p3 p4 n4 n5 n3 n+/p d4 n+/p d6 data enable n2
74lcx540 low voltage octal buffer/line driver with 5v tolerant inputs and outputs ?1995 fairchild semiconductor corporation www.fairchildsemi.com 74lcx540 rev. 1.1 8 t ape and reel speci?ation t ape format for dqfn t ape dimensions inches (millimeters) reel dimensions inches (millimeters) package designator t ape section number cavities cavity status cover tape status bqx leader (start end) 125 (typ) empty sealed carrier 3000 filled sealed tr ailer (hub end) 75 (typ) empty sealed t ape size abcdnw1w2 12mm 13.0 (330.0) 0.059 (1.50) 0.512 (13.00) 0.795 (20.20) 2.165 (55.00) 0.488 (12.4) 0.724 (18.4)
74lcx540 low voltage octal buffer/line driver with 5v tolerant inputs and outputs ?1995 fairchild semiconductor corporation www.fairchildsemi.com 74lcx540 rev. 1.1 9 physical dimensions inches (millimeters) unless otherwise noted figure 3. 20-lead small outline integrated circuit (soic), jedec ms-013, 0.300" wide package number m20b
74lcx540 low voltage octal buffer/line driver with 5v tolerant inputs and outputs ?1995 fairchild semiconductor corporation www.fairchildsemi.com 74lcx540 rev. 1.1 10 physical dimensions (continued) millimeters unless otherwise noted figure 4. 20-lead small outline package (sop), eiaj type ii, 5.3mm wide package number m20d
74lcx540 low voltage octal buffer/line driver with 5v tolerant inputs and outputs ?1995 fairchild semiconductor corporation www.fairchildsemi.com 74lcx540 rev. 1.1 11 physical dimensions (continued) millimeters unless otherwise noted figure 5. pb-free 20-terminal depopulated quad very-thin flat pack no leads (dqfn), jedec mo-241, 2.5 x 4.5mm package number mlp020b
74lcx540 low voltage octal buffer/line driver with 5v tolerant inputs and outputs ?1995 fairchild semiconductor corporation www.fairchildsemi.com 74lcx540 rev. 1.1 12 physical dimensions (continued) millimeters unless otherwise noted figure 6. 20-lead shrink small outline package (ssop), jedec mo-150, 5.3mm wide package number msa20
74lcx540 low voltage octal buffer/line driver with 5v tolerant inputs and outputs ?1995 fairchild semiconductor corporation www.fairchildsemi.com 74lcx540 rev. 1.1 13 physical dimensions (continued) millimeters unless otherwise noted figure 7. 20-lead thin shrink small outline package (tssop), jedec mo-153, 4.4mm wide package number mtc20
74lcx540 low voltage octal buffer/line driver with 5v tolerant inputs and outputs ?1995 fairchild semiconductor corporation www.fairchildsemi.com 74lcx540 rev. 1.1 14 rev. i28 trademarks the following are registered and unregistered trademarks and service marks fairchild semiconductor owns or is authorized to use and is not intended to be an exhaustive list of all such trademarks disclaimer fairchild semiconductor reserves the right to make changes without further notice to any products herein to improve reliability, function, or design. fairchild does not assume any liability arising out of the application or use of any product or circuit described herein; neither does it convey any license under its patent rights, nor the rights of others. these specifications do not expand the terms of fairchild? worldwide terms and conditions, specifically the warranty therein, which covers these products. life support policy fairchild? products are not authorized for use as critical components in life support devices or systems without the express written approval of fairchild semiconductor corporation. as used herein: 1. life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in significant injury to the user. 2. a critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. product status definitions definition of terms acex build it now coreplus crossvolt ctl current transfer logic ecospark fact quiet series fact fast fastvcore fps frfet global power resource sm green fps green fps e-series gto i-lo intellimax isoplanar megabuck microcoupler micropak motion-spm optologic optoplanar pdp-spm power220 power247 poweredge power-spm powertrench programmable active droop qfet qs qt optoelectronics quiet series rapidconfigure smart start spm stealth superfet supersot-3 supersot-6 supersot-8 syncfet the power franchise tinyboost tinybuck tinylogic tinyopto tinypower tinypwm tinywire serdes uhc unifet vcx datasheet identi?ation product status de?ition advance information formative or in design this datasheet contains the design speci?ations for product development. speci?ations may change in any manner without notice. preliminary first production this datasheet contains preliminary data; supplementary data will be published at a later date. fairchild semiconductor reserves the right to make changes at any time without notice to improve design. no identi?ation needed full production this datasheet contains ?al speci?ations. fairchild semiconductor reserves the right to make changes at any time without notice to improve design. obsolete not in production this datasheet contains speci?ations on a product that has been discontinued by fairchild semiconductor. the datasheet is printed for reference information only.

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