1 idt74fct20807 2.5v cmos 1-to-10 clock driver industrial temperature range may 2010 2005 integrated device technology, inc. dsc - 6171/14 c idt74fct20807 industrial temperature range 2.5v cmos 1-to-10 clock driver description: the fct20807 is a 2.5v compatible, high speed, low noise, 1:10 fanout, non-inverting clock buffer. the large fanout from a single input reduces loading on the preceding driver and provides an efficient clock distribution network. providing output to output skew as low as 150ps, the fct20807 is an ideal clock distribution device for synchronous systems. multiple power and grounds reduce noise. typical applications are clock and signal distribution. 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 gnd v cc gnd v cc gnd gnd v cc gnd o 5 v cc in o 1 o 2 o 3 o 4 o 10 o 9 o 8 o 7 o 6 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 ssop/ qsop top view features: ? high frequency > 150mhz ? guaranteed low skew < 150ps (max.) between any two outputs ? very low duty cycle distortion < 300ps ? high speed: propagation delay < 3ns ? very low cmos power levels ? ttl compatible inputs and outputs ? 1:10 fanout ? maximum output rise and fall time < 1.25ns (max.) ? low input capacitance: 3pf typical ? 2.5v supply voltage ? available in ssop and qsop packages the idt logo is a registered trademark of integrated device technology, inc.
2 industrial temperature range idt74fct20807 2.5v cmos 1-to-10 clock driver 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 = 2.5v, +25c ambient. 3. this parameter is not directly testable, but is derived for use in total power supply calculations. 4 . i c = i quiescent + i inputs + i dynamic i c = i cc + ? i cc d h n t + i ccd (f i ) i cc = quiescent current (i ccl , i cch and i ccz ) ? i cc = power supply current for a ttl high input (v i n = v cc -0.6v) 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 absolute maximum ratings (1) symbol description max unit v term (2) terminal voltage with respect to gnd ?0.5 to +4.6 v v term (3) terminal voltage with respect to gnd ?0.5 to +5.5 v v term (4) terminal voltage with respect to gnd ?0.5 to v cc +0.5 v t stg storage temperature ?65 to +150 c i out dc output current ?60 to +60 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. v cc terminals. 3. input terminals. 4. outputs and i/o terminals. capacitance (t a = +25 o c, f = 1.0mhz) symbol parameter (1) conditions typ. max. unit c in input capacitance v in = 0v 3 4 pf c out output capacitance v out = 0v ? 6 pf note: 1. this parameter is measured at characterization but not tested. pin description pin names description i n clock inputs o x clock outputs power supply characteristics symbol parameter test conditions (1) min. typ. (2) max. unit i ccl quiescent power supply current v cc = max. ? 0.1 20 a i cch ttl inputs high v in = gnd or v cc ? i cc power supply current per v cc = max. ? 45 300 a input high v in = v cc ? 0.6v i ccd dynamic power supply current v cc = 2.7v 150 mhz ? 40 ? a per output (3) 15 pf /mhz v cc = max. v in = v cc ?6590 i c total power supply current (4) c l = 12pf v in = gnd ma all outputs toggling v in = v cc ? 0.6v ? 75 100 fi = 150mhz v in = gnd
3 idt74fct20807 2.5v cmos 1-to-10 clock driver industrial temperature range dc electrical characteristics over operating range following conditions apply unless otherwise specified industrial: t a = -40c to +85c, v cc = 2.5v 0.2v symbol parameter test conditions (1) min. typ. (2) max. unit v ih input high level 1.7 ? ? v v il input low level ? ? 0.7 v i ih input high current (input pins) v cc = max., v i = v cc ?? 1ma i il input low current (input pins) v cc = max., v i = gnd ? ? 1ma v ik clamp diode voltage v cc = min., i in = ?18ma ? ?0.7 ?1 v i odh output high current v cc = 2.5v, v in = v ih or v il , v o = 1.25v (3) -25 -45 -100 ma i odl output low current v cc = 2.5v, v in = v ih or v il , v o = 1.25v (3) 20 55 120 m a v oh output high voltage v cc = min. i oh = ?1ma v cc ?0.2 ? ? v v in = v ih or v il i oh = ?8ma 1.8 (5) ?? v ol output low voltage v cc = min. i ol = 1ma ? ? 0.4 v v in = v ih or v il i ol = 8ma ? ? 0.6 i os short circuit current (4) v cc = max., v o = gnd (3) -25 -60 -135 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 vcc = 2.5v, +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. v oh = vcc - 0.6v at rated current.
4 industrial temperature range idt74fct20807 2.5v cmos 1-to-10 clock driver notes: 1. t plh and t phl are production tested. all other parameters guaranteed but not production tested. 2. 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. 3. see test circuits and waveforms. 4. skew measured between all outputs under identical transitions and load conditions. 5. skew measured is difference between propagation delay times t phl and t plh of same output under identical load conditions. 6. part to part skew for all outputs given identical transitions and load conditions at identical v cc levels and temperature. 7. airflow of 1m/s is recommended for frequencies above 133mhz. switching characteristics over operating range (1,2) following conditions apply unless otherwise specified industrial: t a = -40c to +85c, v cc = 2.5v 0.2v symbol parameter conditions (3,7) min . typ. max . unit t plh propagation delay c l = 12pf ? 2.4 2.7 ns t phl 150 mhz t r output rise time ? 1 1.2 ns t f output fall time ? 1 1.2 ns t sk(o) same device output pin-to-pin skew (4) ? 100 150 ps t sk(p) pulse skew (5) ? 250 300 ps t sk(pp) part-to-part skew (6) ? 400 600 ps symbol parameter conditions (3) min . typ. max . unit t plh propagation delay c l = 22pf ? 3 3.5 ns t phl 100 mhz t r output rise time ? 1 1.25 ns t f output fall time ? 1 1.25 ns t sk(o) same device output pin-to-pin skew (4) ? 100 150 ps t sk(p) pulse skew (5) ? 250 300 ps t sk(pp) part-to-part skew (6) ? 400 600 ps
5 idt74fct20807 2.5v cmos 1-to-10 clock driver industrial temperature range t plh1 output 1 output 2 t sk(o) t plh2 2.5v 0v v oh 1.25v 1.25v v ol v oh 1.25v v ol input t phl1 t phl2 t sk(o) t sk(o) = |t plh2 - t plh1 | or |t phl2 - t phl1 | 2.5v 0v v oh t plh t phl v ol 1.25v 1.25v t r t f 1.7v 0.7v input output t plh t phl 2.5v 0v v oh 1.25v 1.25v v ol t sk(p) = |t phl - t plh | input output input t plh1 device 1 output device 2 output t sk(t) t plh2 2.5v 0v v oh 1.25v 1.25v v ol v oh 1.25v v ol t phl1 t phl2 t sk(t) t sk(t) = |t plh2 - t plh1 | or |t phl2 - t phl1 | pulse generator v in v out v cc c l d.u.t. test circuits and waveforms note: device 1 and device 2 are same package type and speed grade. pulse skew - t sk(p) part-to-part skew - t sk(pp) propagation delay output skew - t sk(o) c l = load capacitance: includes jig and probe capacitance test conditions symbol v cc = 2.5v 0.2v unit c l 22 (1) pf 12 (2) r t z out of pulse generator ? t r / t f 1.25 (1) ns 1.2 (2) definitions: c l = load capacitance: includes jig and probe capacitance. r t = termination resistance: should be equal to z out of the pulse generator. t r / t f = rise/fall time of the input stimulus from the pulse generator. notes: 1. test conditions at 100mhz. 2. test conditions at 150mhz.
6 industrial temperature range idt74fct20807 2.5v cmos 1-to-10 clock driver ordering information idt74fct temp. range xxxx device type x package 20807 1-to-10 2.5v clock driver py q qg shrink small outline ic quarter-size small outline ic qsop - green x i industrial (-40c to +85c) corporate headquarters for sales: for tech support: 6024 silver creek valley road 800-345-7015 or 408-284-8200 clockhelp@idt.com san jose, ca 95138 fax: 408-284-2775 www.idt.com pyg
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