mdsl-00011-04 quality semiconductor, inc. 1 december 28, 1998 qs54/74fct240t, 244t, 2240t, 2244t now an company 1g (1) 1a1(2) 1a2(4) 1a3(6) 1a4(8) 1y1(18) 1y2(16) 1y3(14) 1y4(12) 2g (19) 2a1(11) 2a2(13) 2a3(15) 2a4(17) 2y1(9) 2y2(7) 2y3(5) 2y4(3) 1g (1) 1a1(2) 1a2(4) 1a3(6) 1a4(8) 1y1(18) 1y2(16) 1y3(14) 1y4(12) 2g (19) 2a1(11) 2a2(13) 2a3(15) 2a4(17) 2y1(9) 2y2(7) 2y3(5) 2y4(3) fct240 fct2240 fct244 fct2244 features/benefits ? pin and function compatible to the 74f240/4 74fct240/4 and 74abt240/4 ? industrial temperature C40 c to 85 c ? cmos power levels: <7.5mw static ? available in dip, soic, qsop, zip, hqsop ? undershoot clamp diodes on all inputs ? ttl-compatible input and output levels ? ground bounce controlled outputs ? reduced output swing of 0-3.5v ? military product compliant to mil-std-883, class b fct-t 240t, 244t ? jedec-fct spec compatible ? std. thru d speed grades with 3.8ns t pd for d ?i ol = 64ma ind., 48ma mil. fct-t 2240t, 2244t ? built-in 25 w series resistor outputs reduce reflection and other system noise ? std. thru c speed grades with 4.1ns t pd for c ?i ol = 12ma ind. description the fct240t and fct244t are 8-bit buffers/line drivers with three-state outputs that are ideal for driving high-capacitance loads as in memory ad- dress and data buses. the fct2240t and fct2244t are 25 w resistor output versions useful for driving transmission lines and reducing system noise. the 2240 and 2244 series parts can replace the 240/244 series to reduce noise in an existing design. all inputs have clamp diodes for undershoot noise suppres- sion. all outputs have ground bounce suppression (see qsi application note an-001), and outputs will not load an active bus when v cc is removed from the device. figure 1. functional block diagram q q uality s emiconductor, i nc. q high-speed cmos 8-bit buffers/line drivers qs54/74fct240t qs54/74fct244t qs54/74fct2240t qs54/74fct2244t note: pin 19 is 2g on the fct244.
2 quality semiconductor, inc. mdsl-00011-04 december 28, 1998 qs54/74fct240t, 244t, 2240t, 2244t now an company figure 2. pin configurations (all pins top view) pdip, soic, qsop, hqsop zip table 1. pin description name i/o description xa4-xa0 i data inputs xy4-xy0 o data outputs - three state 1g / 2g i output enables table 2. function tables fct240/fct2240 1g 1g 1g 1g 1g / 2g 2g 2g 2g 2g input a output y hx z ll h lh l 1g 1g 1g 1g 1g / 2g 2g 2g 2g 2g input a output y hx z ll l lh h fct244/fct2244 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 1g 1a1 2y4 1a2 2y3 1a3 2y2 1a4 2y1 gnd v cc 2g 1y1 2a4 1y2 2a3 1y3 2a2 1y4 2a1 1g 2y4 2y3 2y2 2y1 2a1 2a2 2a3 2a4 2g 1a1 1a2 1a3 1a4 gnd 1y4 1y3 1y2 1y1 v cc 1 3 5 7 9 11 13 15 17 19 2 4 6 8 10 12 14 16 18 20
mdsl-00011-04 quality semiconductor, inc. 3 december 28, 1998 qs54/74fct240t, 244t, 2240t, 2244t now an company symbol parameter test conditions (1) min max unit i cc quiescent power v cc = max., freq = 0 1.5 ma supply current 0v v in 0.2v or v cc -0.2v v in v cc d i cc supply current per v cc = max., v in = 3.4v, freq = 0 (2) 2.0 ma input @ ttl high q ccd supply current per v cc = max., outputs open and enabled 0.25 ma/ input per mhz one bittoggling @ 50% duty cycle mhz other inputs at gnd or v cc (3,4) table 3. absolute maxuimum ratings supply voltage to ground ................................................. C0.5v to 7.0v dc output voltage v out ................................................... C0.5v to 7.0v dc input voltage v in ......................................................... C0.5v to 7.0v ac input voltage (for a pulse width 20ns) ................................. C3.0v dc input diode current with v in < 0 ........................................... C20ma dc output diode current with v out < 0 ...................................... C50ma dc output current max. sink current/pin .................................. 120ma maximum power dissipation ................................................... 0.5 watts t stg storage temperature ............................................... C65 to 150 c notes: 1. capacitance is characterized but not tested. 2. pin reference for 20-pin package. note: stresses greater than those listed under absolute maximum ratings may cause permanent damage to qsi devices that result in func- tional or reliability type failures. pins (2) soic qsop pdip zip unit 1, 19 4457pf 2-9,11-18 8 8 9 10 pf table 4. capacitance (1) t a = 25 c, f = 1mhz, v in = 0v, v out = 0v table 5. power supply characteristics notes: 1. for conditions shown as min. or max., use the appropriate values specified under dc specifications. 2. per ttl driven input (v in = 3.4v). 3. for flip-flops, q ccd is measured by switching one of the data input pins so that the output changes every clock cycle. this is a measurement of device power consumption only and does not include power to drive load capacitance or tester capacitance. this parameter is guaranteed by design but not tested. 4. i c can be computed using the above parameters as explained in the technical overview section.
4 quality semiconductor, inc. mdsl-00011-04 december 28, 1998 qs54/74fct240t, 244t, 2240t, 2244t now an company table 6. dc electrical characteristics over operating range industrial t a = C40 c to 85 c, v cc = 5.0v 5% military t a = C55 c to 125 c, v cc = 5.0v 10% notes : 1. typical values indicate v cc = 5.0v and t a = 25 c. 2. not more than one output should be shorted and the duration is 1 second. 3. these parameters are guaranteed by design but not tested. symbol parameter test conditions min typ (1) max unit v ih input high voltage logic high for all inputs 2.0 v v il input low voltage logic low for all inputs 0.8 v d v t input hysteresis v tlh C v thl for all inputs 0.2 v | i ih | input current v cc = max., 0 v in < v cc 5 m a | i il | input high or low | i oz | off-state output v cc = max., 0 v in v cc 5 m a current (hi-z) i os short circuit current v cc = max., v out = gnd (2,3) C60 ma (fctxxx) i or current drive v cc = min., v out = 2.0v (3) 50 ma (fct2xxx C 25 w ) v ic input clamp voltage v cc = min., i in = C18ma, t a = 25 c (3) C0.7 C1.2 v v oh output high voltage v cc = min. i oh = C12ma (mil) 2.4 v i oh = C15ma (ind) 2.4 v ol output low voltage v cc = min. i ol = 48ma (mil) 0.55 v (fctxxx) i ol = 64ma (ind) 0.55 v ol output low voltage v cc = min. i ol = 12ma (mil) 0.50 v (fct2xxx C 25 w )i ol = 12ma (ind) 0.50 r out output resistance v cc = min. i ol = 12ma (mil) 25 w (fct2xxx C 25 w )i ol = 12ma (ind) 20 28 40
mdsl-00011-04 quality semiconductor, inc. 5 december 28, 1998 qs54/74fct240t, 244t, 2240t, 2244t now an company 240a 240c 2240 2240a 2240c 240d symbol description (1) min max min max min max min max unit t phl propagation delay ind 1.5 8 1.5 4.8 1.5 4.1 1.5 3.8 ns t plh ai to yi (fct240) mil 1.5 9 1.5 5.1 1.5 4.7 t phl propagation delay ind 1.5 8 1.5 4.8 1.5 4.1 ns t plh ai to yi (fct2240) mil 1.5 9 1.5 5.1 1.5 4.7 t pzh output enable time ind 1.5 10 1.5 6.2 1.5 5.8 1.5 5.6 ns t pzl g to yi (fct240) mil 1.5 10.5 1.5 6.5 1.5 6.5 t pzh output enable time ind 1.5 10 1.5 6.2 1.5 5.8 ns t pzl g to yi (fct2240) mil 1.5 10.5 1.5 6.5 1.5 6.5 t phz output disable time ind (2) 1.5 9.5 1.5 5.6 1.5 5.2 1.5 5.2 ns t plz g to yi mil (2) 1.5 10 1.5 5.9 1.5 5.7 table 7. fct240t, fct2240t switching characteristics over operating range industrial t a = C40 c to 85 c, v cc = 5.0v 5% military t a = C55 c to 125 c, v cc = 5.0v 10% c load = 50pf, r load = 500 w unless otherwise noted. table 8. fct244t, fct2244t switching characteristics over operating range industrial t a = C40 c to 85 c, v cc = 5.0v 5% military t a = C55 c to 125 c, v cc = 5.0v 10% c load = 50pf, r load = 500 w unless otherwise noted. 244 244a 244c 2244 2244a 2244c 244d symbol description (1) min max min max min max min max unit t phl propagation delay ind 1.5 6.5 1.5 4.8 1.5 4.1 1.5 3.8 ns t plh ai to yi (fct244) mil 1.5 7.5 1.5 5.1 1.5 4.6 t phl propagation delay ind 1.5 6.5 1.5 4.8 1.5 4.1 1.5 3.8 ns t plh ai to yi (fct2244) mil 1.5 7.5 1.5 5.1 1.5 4.6 t pzh output enable time ind 1.5 8 1.5 6.2 1.5 5.8 1.5 5.6 ns t pzl g to yi (fct244) mil 1.5 8.5 1.5 6.5 1.5 6.5 t pzh output enable time ind 1.5 8 1.5 6.2 1.5 5.8 1.5 5.6 ns t pzl g to yi (fct2244) mil 1.5 8.5 1.5 6.5 1.5 6.5 t phz output disable time ind (2) 1.5 7 1.5 5.6 1.5 5.2 1.5 5.2 ns t plz g to yi mil (2) 1.5 7.5 1.5 5.9 1.5 5.7 notes: 1. minimums guaranteed but not tested. 2. this parameter is guaranteed by design but not tested. 3. see test circuit and waveforms.
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