1 idt74fctl2257t high-speed cmos quad 2-input multiplexer extended commercial temperature range september 1999 1999 integrated device technology, inc. dsc-5402/- c idt74fctl2257t extended commercial temperature range high-speed cmos quad 2-input multiplexer description: the idt74fctl2257t is a 25 w resistor output version of a high-speed cmos ttl-compatible, quad, 2-input multiplexer, useful for driving trans- mission lines and reducing system noise. all inputs have clamp diodes for undershoot noise suppression. all outputs have ground bounce suppres- sion. outputs will not load an active bus when vcc is removed from the device. functional block diagram 25 w za 25 w zb 25 w zc 25 w zd oe s i0a i1a i0b i1b i0c i1c i0d i1d 15 1 23 5 6 14 13 11 10 4 7 12 9 features: - pin and function compatible to the quality qs74fct family - extended commercial range of C40c to +85c - cmos power levels: <7.5mw static - available in pdip, soic and qsop packages - undershoot clamp diodes on all inputs - true ttl input and output compatibility - ground bounce controlled outputs - reduced output swing of 0 to 3.5v - built-in 25 w series resistor outputs reduce reflection and other system noise - std., a and c speed grades with 4.3ns for c - i ol = 12ma
2 extended commercial temperature range idt74fctl2257t high-speed cmos quad 2-input multiplexer pin configuration pdip/ soic/ qsop top view p16-1 so16-1 so16-7 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 1 s i 0a gnd zb i 0b i 1b i 1a oe i 0d i 1d z d i 0c i 1c zc v cc z a absolute maximum ratings (1) symbol description max. unit v term (2) terminal voltage with respect to gnd C 0.5 to +7 v v term (3) terminal voltage with respect to gnd C 0.5 to +7 v t stg storage temperature C 65 to +150 c i out dc output current 120 ma i ik continuous clamp current, C 20 ma i ok v i < 0 or v o < 0 C 50 ma fct l notes: 1. stresses greater than those listed under absolute maximum ratings may cause permanent damage to the device. this is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. exposure to absolute maximum rating conditions for extended periods may affect reliability. 2. v cc terminals. 3. all terminals except v cc . capacitance (t a = +25 o c, f = 1.0mhz) symbol parameter (1) conditions typ. max. unit c in input capacitance v in = 0v 6 10 pf c out output capacitance v out = 0v 8 12 pf fctl note: 1. this parameter is measured at characterization but not tested. pin description pin names description i 0a - i 0d source o data inputs i 1a - i 1d source i data inputs oe enable input (active low) s select input z a - z d outputs function table (1) inputs oe s i 0 i 1 outputs hxxx z lhxl l lhxh h lllx l llhx h note: 1. h = high voltage level x = don't care l = low voltage level z = high-impedance
3 idt74fctl2257t high-speed cmos quad 2-input multiplexer extended commercial temperature range dc electrical characteristics over operating range following conditions apply unless otherwise specified: extended commercial: t a = -40c to +85c, v cc = 5.0v 5% symbol parameter test conditions (1) min. typ. (2) max. unit v ih input high level guaranteed logic high level 2 v v il input low level guaranteed logic low level 0.8 v d v t input hysteresis v tlh - v thl for all inputs 0.2 v i ih input high current v cc = max. 0 v in < vcc 5 a i il input low current i oz off-state output current (hi-z) v cc = max. 0 v in vcc 5 a i or current drive v cc = max., v out = 2.0v (2) 50 ma v ic input clamp voltage v cc = min., i in = C18ma, t a = 25 c C0.7 C1.2 v v oh output high voltage v cc = min. i oh = -15ma 2.4 v v ol output low voltage (25 w )v cc = min. i ol = 12ma 0.5 v r out output resistance (25 w ) v cc = min. i ol = 12ma 20 28 40 w notes: 1. typical values are at v cc = 5.0v, t a = 25c. 2. not more than one output should be shorted at one time. duration of the short circuit test should not exceed one second. power supply characteristics following conditions apply unless otherwise specified: extended commercial: t a = -40c to +85c, v cc = 5.0v 5% symbol parameter test conditions (1) min. max. unit i cc quiescent power supply current v cc = max. freq = 0 0v v in 0.2v or vcc-0.2v v in vcc 1.5ma d i cc supply current per input ttl inputs high v cc = max. v in = 3.4v (2) freq = 0 2ma i ccd supply current per input per mhz v cc = max. outputs open and enabled one bit toggling 50% duty cycle other inputs at gnd or vcc (3,4) 0.25 ma/mhz fctl notes: 1. for conditions shown as min. or max., use the appropriate values specified under dc electrical characteristics. 2. per tll 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. 4. i c = i quiescent + i inputs + i dynamic i c = i cc + d i cc d h n t + i ccd (f cp /2 + f i n i ) i cc = quiescent current d i cc = power supply current for a ttl high input (v in = 3.4v) d h = duty cycle for ttl inputs high n t = number of ttl inputs at d h i ccd = dynamic current caused by an output transition pair (hlh or lhl) f cp = clock frequency for register devices (zero for non-register devices) f i = input frequency n i = number of inputs at f i all currents are in milliamps and all frequencies are in megahertz.
4 extended commercial temperature range idt74fctl2257t high-speed cmos quad 2-input multiplexer switching characteristics over operating range (1) following conditions apply unless otherwise specified: extended commercial: t a = -40c to +85c, v cc = 5.0v 5% 74fctl2257t 74fctl2257at 74fctl2257ct symbol parameter min. max. min. max. min. max. unit t plh t phl propagation delay ixx to zx 1.5 6 1.5 5 1.5 4.3 ns t plh t phl propagation delay s to zx 1.5 10.5 1.5 7 1.5 5.2 ns t pzh t pzl output enable time oe to zx 1.5 8.5 1.5 7 1.5 6 ns t phz t plz output disable time oe to zx 1.5 6 1.5 5.5 1.5 5 ns notes: 1. c load = 50pf, r load = 500 w unless otherwise noted.
5 idt74fctl2257t high-speed cmos quad 2-input multiplexer extended commercial temperature range pulse generator r t d.u.t. v cc v in c l v out 50pf 500 w 500 w 7.0v 3v 1.5v 0v 3v 1.5v 0v 3v 1.5v 0v 3v 1.5v 0v data input timing input asynchronous control preset clear etc. synchronous control t su t h t rem t su t h high-low-high pulse low-high-low pulse t w 1.5v 1.5v same phase input transition 3v 1.5v 0v 1.5v v oh t plh output opposite phase input transition 3v 1.5v 0v t plh t phl t phl v ol control input 3v 1.5v 0v 3.5v 0v output normally low output normally high switch closed switch open v ol 0.3v 0.3v t plz t pzl t pzh t phz 3.5v 0v 1.5v 1.5v enable disable v oh preset clear clock enable etc. octal link octal link octal link octal link octal link test cir cuits and w a veforms propagation delay test circuits for all outputs enable and disable times set-up, hold, and release times pulse width notes: 1. diagram shown for input control enable-low and input control disable- high 2. pulse generator for all pulses: rate 1.0mhz; t f 2.5ns; t r 2.5ns switch position test switch open drain disable low closed enable low all other tests open fctl definitions: c l = load capacitance: includes jig and probe capacitance. r t = termination resistance: should be equal to z out of the pulse generator.
6 extended commercial temperature range idt74fctl2257t high-speed cmos quad 2-input multiplexer corporate headquarters for sales: 2975 stender way 800-345-7015 or 408-727-6116 santa clara, ca 95054 fax: 408-492-8674 www.idt.com* *to search for sales office near you, please click the sales button found on our home page or dial the 800# above and press 2. the idt logo is a registered trademark of integrated device technology, inc. ordering information idt xx fctl xxxx xx package device type p so q plastic dip (p16-1) small outline ic (gull wing) (so16-1) quarter size small outline package (so16-7) high-speed cmos quad 2-input multiplexer 2257t 2257at 2257ct temp. range 74 C40c to +85c
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