1 idt74fct164245t fast cmos 16-bit bidirectional 3.3v to 5v translator commercial temperature range august 1999 1999 integrated device technology, inc. dsc-2555/4 c idt74fct164245t commercial temperature range fast cmos 16-bit bidirectional 3.3v to 5v translator description: the fct164245t 16-bit 3.3v-to-5v translator is built using advanced dual metal cmos technology. this high-speed, low-power transceiver is designed to interface between a 3.3v bus and a 5v bus in a mixed 3.3v/ 5v supply environment. this enables system designers to interface ttl compatible 3.3v components with 5v components. the direction and output enable controls operate these devices as either two independent 8-bit transceivers or one 16-bit transceiver. the a port interfaces with the 3.3v bus; the b port interfaces with the 5v bus. the direction control (xdir) pin controls the direction of data flow. the output enable pin (x oe ) overrides the direction control and disables both ports. these control signals can be driven from either 3.3v or 5v devices. the fct164245t is ideally suited for driving high-capacitance loads and low-impedance backplanes. the output buffers are designed with power off disable capability to allow "hot insertion" of boards when used as backplane drivers. they also allow interface between a mixed supply system and external 5 volt peripherals. 1 dir 1 oe 1 a 1 1 a 2 1 a 3 1 a 4 1 a 5 1 a 6 1 a 7 1 a 8 1 b 1 1 b 2 1 b 3 1 b 4 1 b 5 1 b 6 1 b 7 1 b 8 3.3v port 5v port 2 dir 2 oe 2 a 1 2 a 2 2 a 3 2 a 4 2 a 5 2 a 6 2 a 7 2 a 8 2 b 1 2 b 2 2 b 3 2 b 4 2 b 5 2 b 6 2 b 7 2 b 8 3.3v port 5v port 1 47 48 2 3 5 6 46 44 43 41 40 38 37 8 9 11 12 24 36 35 33 32 30 25 29 27 26 22 23 13 14 16 17 19 20 features: - 0.5 micron cmos technology - bidirectional interface between 3.3v and 5v buses - control inputs can be driven from either 3.3v or 5v circuits - esd > 2000v per mil-std-883, method 3015; > 200v using machine model (c = 200pf, r = 0) - 25 mil pitch ssop and 19.6 mil pitch tssop packages - extended commercial range of -40c to +85c - v cc1 = 5v 10%, v cc2 = 2.7v to 3.6v - high drive outputs (-32ma i oh , 64ma i ol ) on 5v port - power off disable on both ports permits live insertion - typical v olp (output ground bounce) < 0.9v at v cc1 = 5v, v cc2 = 3.3v, t a = 25c functional block diagram
2 commercial temperature range idt74fct164245t fast cmos 16-bit bidirectional 3.3v to 5v translator ssop/ tssop top view pin configuration 1 dir 1 b 1 gnd 1 b 3 v cc1 gnd 2 b 2 gnd v cc1 gnd 1 b 2 1 b 4 1 b 5 1 b 6 1 b 7 1 b 8 2 b 1 2 b 3 2 b 4 2 b 5 2 b 7 2 b 8 2 b 6 2 dir 1 a 1 1 a 2 gnd 1 a 3 1 a 4 v cc2 1 a 5 1 a 6 1 a 7 1 a 8 2 a 1 2 a 2 2 a 3 2 a 4 v cc2 2 a 5 2 a 7 2 a 8 2 a 6 gnd gnd gnd 2 oe 1 oe 39 29 30 31 32 33 34 35 36 37 38 25 26 27 28 48 47 41 42 43 44 45 46 40 1 2 3 4 5 6 7 8 9 10 12 13 14 15 16 17 18 19 20 11 21 22 23 24 so48-1 so48-2 power supply sequencing in the idt74fct164245t, the condition of v cc1 3 (v cc2 C 0.5v) must be maintained at all times. for the range of v cc1 = (v cc2 C 0.5v) to v cc1 = (v cc2 + 0.9v), both the a and b ports will remain in a high- impedance state. absolute maximum ratings (1) symbol rating max. unit v term (2) terminal voltage with respect to gnd C0.5 to +7 v v term (3) terminal voltage with respect to gnd C0.5 to v cc1 +0.5 v t a operating temperature C40 to +85 c t bias temperature under bias C55 to +125 c t stg storage temperature C55 to +125 c p t power dissipation 1 w i out dc output current C60 to 120 ma 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. all device terminals except v cc2 . 3. power supply terminals v cc2 . capacitance (t a = +25 o c, f = 1.0mhz) symbol parameter (1) conditions typ. max. unit c in input capacitance v in = 0v 3.5 6 pf c i/o i/o capacitance v out = 0v 3.5 8 pf note: 1. this parameter is measured at characterization but not tested. pin description pin names description x oe output enable input (active low) xdir direction control input xax side a inputs or 3-state outputs (3.3v port) xbx side b inputs or 3-state outputs (5v port) function table (1) inputs xoe xdir outputs l l bus b data to bus a l h bus a data to bus b h x high z state note: 1. h = high voltage level l = low voltage level x = don't care z = high-impedance
3 idt74fct164245t fast cmos 16-bit bidirectional 3.3v to 5v translator commercial temperature range dc electrical characteristics over operating range (a port, 3.3v) following conditions apply unless otherwise specified: v cc1 = 5v 10%, v cc2 = 2.7v to 3.6v; commercial: t a = -40c to +85c symbol parameter test conditions (1) min. typ. (2) max. unit v ih input high level (input and i/o pins) guaranteed logic high level 2 5.5 v v il input low level (input and i/o pins) guaranteed logic low level C0.5 0.8 v i ih input high current (input pins) v cc1 = max. v i = 5.5v 5a input high current (i/o pins) v cc2 = max. v i = v cc2 15 i il input low current (input pins) v i = gnd 5 input low current (i/o pins) v i = gnd 15 v ik clamp diode voltage v cc2 = min., i in = C18ma C0.7 C1.2 v v oh output high voltage v cc1 = v cc2 = min. i oh = C0.1ma v cc2 C0.2 v v in = v ih or v il v cc2 = 3v i oh = C8ma 2.4 3 v in = v ih or v il v ol output low voltage v cc1 = min. i ol = 0.1ma 0.2 v v cc2 = min. i ol = 16ma 0.2 0.4 v in = v ih or v il i ol = 24ma 0.3 0.55 v cc = 3v i ol = 24ma 0.3 0.5 v in = v ih or v il i off input/output power off leakage v cc1 = 0v, v cc2 = 0v, v in or v o 4.5v 100 a i os short circuit current (4) v cc1 = max., v cc2 = max., v o = gnd (3) C70 C105 C150 ma i o output drive current v cc1 = max., v cc2 = max., v o = 1.5v (3) C40 C60 C90 ma v h input hysteresis 150 mv i cc2l i cc2h i cc2z quiescent power supply current v cc1 = max. v cc2 = max. v in = gnd or v cc2 0.352 ma notes: 1. for conditions shown as max. or min., use appropriate value specified under electrical characteristics for the applicable dev ice type. 2. typical values are at v cc1 = 5.0v, v cc2 = 3.3v, +25c ambient. 3. not more than one output should be shorted at one time. duration of the test should not exceed one second. 4. this parameter is guaranteed but not tested.
4 commercial temperature range idt74fct164245t fast cmos 16-bit bidirectional 3.3v to 5v translator dc electrical characteristics over operating range (b port, 5v) following conditions apply unless otherwise specified: v cc1 = 5v 10%, v cc2 = 2.7v to 3.6v; commercial: t a = -40c to +85c symbol parameter test conditions (1) min. typ. (2) max. unit v ih input high level (input and i/o pins) guaranteed logic high level 2 5.5 v v il input low level (input and i/o pins) guaranteed logic low level C0.5 0.8 v i ih input high current (input pins) v cc1 = max. v i = v cc1 5a input high current (i/o pins) v cc2 = max. 15 i il input low current (input pins) v i = gnd 5 input low current (i/o pins) 15 v ik clamp diode voltage v cc1 = min., i in = C18ma C0.7 C1.2 v v oh output high voltage v cc1 = min. i oh = C3ma 2.5 3.5 v v cc2 = min. i oh = C15ma 2.4 3.5 v in = v ih or v il i oh = C32ma (5) 23 v ol output low voltage v cc1 = min. i ol = 64ma 0.2 0.55 v v cc2 = min. v in = v ih or v il i off input/output power off leakage v cc1 = 0v, v cc2 = 0v, v in or v o 4.5v 100 a i os short circuit current (4) v cc1 = max., v cc2 = max., v o = gnd (3) C80 C140 C225 ma i o output drive current v cc1 = max., v cc2 = max., v o = 2.5v (3) C50 C75 C180 ma v h input hysteresis 150 mv i cc1l i cc1h i cc1z quiescent power supply current v cc1 = max. v cc2 = max. v in = gnd or v cc2 0.08 1.5 ma notes: 1. for conditions shown as max. or min., use appropriate value specified under electrical characteristics for the applicable dev ice type. 2. typical values are at v cc1 = 5.0v, v cc2 = 3.3v, +25c ambient. 3. not more than one output should be shorted at one time. duration of the test should not exceed one second. 4. this parameter is guaranteed but not tested. 5. duration of the condition cannot exceed one second.
5 idt74fct164245t fast cmos 16-bit bidirectional 3.3v to 5v translator commercial temperature range notes: 1. for conditions shown as max. or min., use appropriate value specified under electrical characteristics for the applicable dev ice type. 2. typical values are at v cc1 = 5.0v, v cc2 = 3.3v, +25c ambient. 3. per ttl driven input; all other inputs at v cc or gnd. 4. this parameter is not directly testable, but is derived for use in total power supply calculations. 5. values for these conditions are examples of the i cc formula. these limits are guaranteed but not tested. 6. i c = i quiescent + i inputs + i dynamic i c = i cc1 + i cc2 + d i cc d h n t + i ccd (f cp n cp /2 + fini) i cc1 = quiescent current (i cc1l , i cc1h and i cc1z ) i cc2 = quiescent current (i cc2l , i cc2h and i cc2z ) d i cc = power supply current for a ttl high input d h = duty cycle for ttl inputs high n t = number of ttl inputs at d h i ccd = dynamic current caused by an input transition pair (hlh or lhl) f cp = clock frequency for register devices (zero for non-register devices) n cp = number of clock inputs at f cp fi = input frequency ni = number of inputs at fi power supply characteristics symbol parameter test conditions (1) min. typ. (2) max. unit d i cc quiescent power supply current ttl inputs high v cc1 = max., v cc2 = max. v in = v cc2 C0.6v (3) 1230a i ccd dynamic power supply current (4) v cc1 = max., v cc2 = max. outputs open x oe = xdir = gnd one input toggling 50% duty cycle v in = v cc2 v in = gnd 75 120 a/ mhz i c total power supply current (6) v cc1 = max., v cc2 = max. outputs open fi = 10mhz 50% duty cycle x oe = xdir = gnd one bit toggling v in = v cc2 C0.6v v in = gnd 1.24.7ma v cc1 = max., v cc2 = max. outputs open fi = 2.5mhz 50% duty cycle x oe = xdir = gnd sixteen bits toggling v in = v cc2 C0.6v v in = gnd 3.58.5 (5)
6 commercial temperature range idt74fct164245t fast cmos 16-bit bidirectional 3.3v to 5v translator switching characteristics over operating range fct164245 symbol parameter condition (1) min . (2) max . unit t plh t phl propagation delay a to b c l = 50pf r l = 500 w 1.5 5 ns t plh t phl propagation delay b to a 1.5 5 ns t pzh t pzl output enable time x oe to b 1.5 6.5 ns t phz t plz output disable time x oe to b 1.5 6 ns t pzh t pzl output enable time x oe to a 1.5 6.5 ns t phz t plz output disable time x oe to a 1.5 6 ns t pzh t pzl output enable time xdir to b (3) 1.5 6.5 ns t phz t plz output disable time xdir to b (3) 1.5 6 ns t pzh t pzl output enable time xdir to a (3) 1.5 6.5 ns t phz t plz output disable time xdir to a (3) 1.5 6 ns notes: 1. see test circuit and waveforms. 2. minimum limits are guaranteed but not tested on propagation delays. 3. this parameter is guaranteed but not tested.
7 idt74fct164245t fast cmos 16-bit bidirectional 3.3v to 5v translator commercial temperature range pulse generator r t d.u.t. v cc v in c l v out 50pf 500 w 500 w 6v open gnd 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 preset clear clock enable etc. 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 3v 0v output normally low output normally high switch 6v switch gnd v ol 0.3v 0.3v t plz t pzl t pzh t phz 3v 0v 1.5v 1.5v enable disable v oh 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 switch position test switch open drain disable low 6v enable low disable high gnd enable high all other tests open definitions: c l = load capacitance: includes jig and probe capacitance. r t = termination resistance: should be equal to z out of the pulse generator. 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.
8 commercial temperature range idt74fct164245t fast cmos 16-bit bidirectional 3.3v to 5v translator 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 temp. range fct xx family xxxx device type x package pv pa 245t shrink small outline package (so48-1) thin shrink small outline package (so48-2) 16-bit bidirectional 3.3 volt to 5 volt translator 74 C40c to +85c 164 double-density
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