1 idt74fct807bt/ct fast cmos 1-to-10 clock driver commercial and industrial temperature range december 2000 2000 integrated device technology, inc. dsc-4242 c idt74fct807bt/ct commercial and industrial temperature ranges fast cmos 1-to-10 clock driver description: the fct807t clock driver is built using advanced dual metal cmos technology. this low skew clock driver features 1:10 fanout, providing minimal loading on the preceding drivers. the fct807t offers low capacitance inputs with hysteresis for improved noise margins. ttl level outputs and multiple power and grounds reduce noise. the device also features -32/48ma drive capability for driving low impedance traces. functional block diagram in o 1 o 2 o 3 o 4 o 5 o 6 o 7 o 8 o 9 o 10 pin configuration soic/ ssop/ qsop top view features: - 0.5 micron cmos technology - guaranteed low skew < 250ps (max.) - very low duty cycle distortion < 350ps (max.) - high speed: propagation delay < 2.5ns (max.) - 100mhz operation - ttl compatible inputs and outputs - ttl level output voltage swings - 1:10 fanout - output rise and fall time < 1.5ns (max.) - low input capacitance: 4.5pf typical - high drive: -32ma i oh , 48ma i ol - esd > 2000v per mil std-883, method 3015; > 200v using machine model (c = 200pf, r = 0) - available in soic, ssop, and qsop packages gnd v cc gnd v cc gnd gnd v cc gnd o 5 v cc 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 so20-2 so20-7 so20-8 in o 1 o 2 o 3 o 4 o 10 o 9 o 8 o 7 o 6
2 commercial and industrial temperature range idt74fct807bt/ct fast cmos 1-to-10 clock driver dc electrical characteristics over operating range following conditions apply unless otherwise specified commercial: t a = 0c to +70c, industrial: t a = -40c to +85c, v cc = 5.0v 5% absolute maximum ratings (1) symbol description max unit v term terminal voltage with respect to gnd C0.5 to +7 v t stg storage temperature C65 to +150 c i out dc output current C60 to +120 ma note: 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. capacitance (t a = +25 o c, f = 1.0mhz) symbol parameter (1) conditions typ. max. unit c in input capacitance v in = 0v 4.5 6 pf c out output capacitance v out = 0v 5.5 8 pf note: 1. this parameter is measured at characterization but not tested. pin description pin names description in input ox outputs symbol parameter test conditions (1) min. typ. (2) max. unit v ih input high level (input pins) guaranteed logic high level 2 v v il input low level guaranteed logic low level 0.8 v i ih input high current (input pins) v cc = max. v i = 2.7v 1a i il input low current (input pins) v cc = max. v i = 0.5v 1a i ozh high impedance output current v cc = max. v o = 2.7v 1a i ozl (3-state output pins) v o = 0.5v 1a i i input high current v cc = max., v i = v cc (max.) 1a v ik clamp diode voltage v cc = min., i in = C18ma C0.7 C1.2 v i os short circuit current (4) v cc = max. (3) , v o = gnd C60 C120 C225 ma v oh output high voltage v cc = min. i oh = C15ma 2.4 3.3 v v in = v ih or v il i oh = C32ma 2 3 v ol output low voltage v cc = min. i ol = 48ma 0.3 0.55 v v in = v ih or v il i off input/output power off leakage v cc = 0v, v in or v o 4.5v 1 a v h input hysteresis for all inputs 150 mv i ccl i cch i ccz quiescent power supply current v cc = max. v in = gnd or v cc 5 500 a 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 cc = 5.0v, +25c ambient. 3. not more than one output should be tested at one time. duration of the test should not exceed one second. 4. duration of the condition can not exceed one second.
3 idt74fct807bt/ct fast cmos 1-to-10 clock driver commercial and industrial temperature range power supply characteristics symbol parameter test conditions (1) min. typ. (2) max. unit d i cc quiescent power supply current ttl inputs high v cc = max. v in = 3.4v 0.5 2 ma i ccd dynamic power supply current (3) v cc = max. input toggling 50% duty cycle outputs open v in = v cc v in = gnd 0.40.6ma/ mhz i c total power supply current (5) v cc = max. input toggling 50% duty cycle v in = v cc v in = gnd 20 30.5 (4) ma outputs open fi = 50mhz v in = 3.4v v in = gnd 20.3 31.3 (4) 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 cc = 5.0v, +25c ambient. 3. per ttl driven input; (v in = 3.4v); 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 cc + d i cc d h n t + i ccd (f i ) i cc = quiescent current (i ccl, i cch and i ccz ) 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 input transition pair (hlh or lhl) f i = input frequency all currents are in milliamps and all frequencies are in megahertz.
4 commercial and industrial temperature range idt74fct807bt/ct fast cmos 1-to-10 clock driver notes: 1. see test circuits and waveforms. 2. minimum limits are guaranteed but not tested on propagation delays. 3. t plh , t phl , t sk (t) are production tested. all other parameters guaranteed but not production tested. 4. propagation delay range indicated by min. and max. limit is due to v cc , operating temperature and process parameters. these propagation delay limits do not imply skew. switching characteristics over operating range: commercial (3,4) fct807bt fct807ct symbol parameter conditions (1) min. (2) max. min. (2) max. unit t plh t phl propagation delay 50 w to v cc /2, c l = 10pf 1.3 2.7 1.3 2.5 ns t r output rise time (see figure 1) 1.5 1.5 ns t f output fall time or 50 w ac 1.5 1.5 ns t sk (o) output skew: skew between outputs of same package (same transition) termination, c l = 10pf 0.5 0.25 ns t sk (p) pulse skew: skew between opposite transitions of same output (|t phl -C t plh |) (see figure 2) f 100mhz 0.5 0.35 ns t sk (t) package skew: skew between outputs of different packages at same power supply voltage, temperature, package type and speed grade outputs connected in groups of two 0.9 0.65 ns fct807bt fct807ct symbol parameter conditions (1) min. (2) max. min. (2) max. unit t plh t phl propagation delay c l = 30pf f 67mhz 1.5 3.8 1.5 3.5 ns t r output rise time (see figure 3) 1.5 1.5 ns t f output fall time 1.5 1.5 ns t sk (o) output skew: skew between outputs of same package (same transition) 0.5 0.25 ns t sk (p) pulse skew: skew between opposite transitions of same output (|t phl -C t plh |) 0.5 0.35 ns t sk (t) package skew: skew between outputs of different packages at same power supply voltage, temperature, package type and speed grade 0.9 0.75 ns fct807bt fct807ct symbol parameter conditions (1) min. (2) max. min. (2) max. unit t plh t phl propagation delay c l = 50pf f 40mhz 1.5 3.8 1.5 3.5 ns t r output rise time (see figure 4) 1.5 1.5 ns t f output fall time 1.5 1.5 ns t sk (o) output skew: skew between outputs of same package (same transition) 0.5 0.35 ns t sk (p) pulse skew: skew between opposite transitions of same output (|t phl -C t plh |) 0.6 0.45 ns t sk (t) package skew: skew between outputs of different packages at same power supply voltage, temperature, package type and speed grade 10.75ns
5 idt74fct807bt/ct fast cmos 1-to-10 clock driver commercial and industrial temperature range notes: 1. see test circuits and waveforms. 2. minimum limits are guaranteed but not tested on propagation delays. 3. t plh , t phl , t sk (t) are production tested. all other parameters guaranteed but not production tested. 4. propagation delay range indicated by min. and max. limit is due to v cc , operating temperature and process parameters. these propagation delay limits do not imply skew. switching characteristics over operating range: industrial (3,4) fct807bt fct807ct symbol parameter conditions (1) min. (2) max. min. (2) max. unit t plh t phl propagation delay 50 w to v cc /2, c l = 10pf 1.3 2.9 1.3 2.7 ns t r output rise time (see figure 1) 1.5 1.5 ns t f output fall time or 50 w ac 1.5 1.5 ns t sk (o) output skew: skew between outputs of same package (same transition) termination, c l = 10pf 0.6 0.35 ns t sk (p) pulse skew: skew between opposite transitions of same output (|t phl -C t plh |) (see figure 2) f 100mhz 0.6 0.45 ns t sk (t) package skew: skew between outputs of different packages at same power supply voltage, temperature, package type and speed grade outputs connected in groups of two 0.9 0.65 ns fct807bt fct807ct symbol parameter conditions (1) min. (2) max. min. (2) max. unit t plh t phl propagation delay c l = 30pf f 67mhz 1.5 4 1.5 3.7 ns t r output rise time (see figure 3) 1.5 1.5 ns t f output fall time 1.5 1.5 ns t sk (o) output skew: skew between outputs of same package (same transition) 0.6 0.35 ns t sk (p) pulse skew: skew between opposite transitions of same output (|t phl -C t plh |) 0.6 0.45 ns t sk (t) package skew: skew between outputs of different packages at same power supply voltage, temperature, package type and speed grade 0.9 0.75 ns fct807bt fct807ct symbol parameter conditions (1) min. (2) max. min. (2) max. unit t plh t phl propagation delay c l = 50pf f 40mhz 1.5 4 1.5 3.7 ns t r output rise time (see figure 4) 1.5 1.5 ns t f output fall time 1.5 1.5 ns t sk (o) output skew: skew between outputs of same package (same transition) 0.6 0.45 ns t sk (p) pulse skew: skew between opposite transitions of same output (|t phl -C t plh |) 0.7 0.55 ns t sk (t) package skew: skew between outputs of different packages at same power supply voltage, temperature, package type and speed grade 10.75ns
6 commercial and industrial temperature range idt74fct807bt/ct fast cmos 1-to-10 clock driver pulse generator r t d.u.t. v cc v in c v out l 50pf pulse generator r t d.u.t. v cc v in v out c l 30pf pulse generator r t d.u.t. v cc v in v out 50 w 10pf 220pf pulse generator r t d.u.t. v cc v in v out 100 w 100 w 10pf v cc pulse generator r t d.u.t. v cc v in c l v out 50pf 500 w 500 w 7.0v 50 w to v cc /2, c l = 10pf 50 w ac termination, c l = 10pf figure 1 c l = 30pf circuit c l = 50pf circuit enable and disable time circuit the capacitor value for ac termination is determined by the operating frequency. for very low frequencies a higher capacitor value should be selected. figure 3 figure 4 figure 5 enable and disable time switch position definitions: c l = load capacitance: includes jig and probe capacitance. r t = termination resistance: should be equal to z out of the pulse generator. test circuits figure 2 test switch disable low enable low 6v disable high enable high gnd
7 idt74fct807bt/ct fast cmos 1-to-10 clock driver commercial and industrial temperature range t plh1 output 1 output 2 t sk(o) t plh2 3v 0v v oh 1.5v 1.5v v ol v oh 1.5v v ol input t phl1 t phl2 t sk(o) 3v 0v v oh t plh t phl v ol 1.5v 1.5v t r t f 2.0v 0.8v input t plh1 package 1 output package 2 output t sk(t) t plh2 3v 0v v oh 1.5v 1.5v v ol v oh 1.5v v ol t phl1 t phl2 t sk(t) control input 3v 1.5v 0v 3.5v 0v output normally low output normally high switch closed switch open v ol v oh 0.3v 0.3v t plz t pzl t pzh t phz 3.5v 0v 1.5v 1.5v enable disable t sk(o) = |t plh2 - t plh1 | or |t phl2 - t phl1 | t plh t phl 3v 0v v oh 1.5v 1.5v v ol t sk(p) = |t phl - t plh | t sk(t) = |t plh2 - t plh1 | or |t phl2 - t phl1 | input output input output test w a veforms package delay package skew - t sk (t) output skew - t sk (o) pulse skew - t sk (p) enable and disable times notes: 1. diagram shown for input control enable-low and input control disable-high 2. pulse generator for all pulses: f 1.0mhz; t f 2.5ns; t r 2.5ns package 1 and package 2 are same device type and speed grade
8 commercial and industrial temperature range idt74fct807bt/ct fast cmos 1-to-10 clock driver 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 1-to-10 clock driver idt74fct xxxx device type x package so py q 807bt 807ct small outline ic (so20-2) shrink small outline ic (so20-7) quarter-size small outline ic (so28-8) x temp. range blank i commercial (0c to +70c) industrial (-40c to +85c)
|
