16-bit registers cy74fct16374t CY74FCT162374T sccs055c - august 1994 - revised september 2001 data sheet acquired from cypress semiconductor corporation. data sheet modi?d to remove devices not offered. copyright 2001, texas instruments incorporated 1CY74FCT162374T features ? off supports partial-power-down mode operation edge-rate control circuitry for signi?antly improved noise characteristics typical output skew < 250 ps esd > 2000v tssop (19.6-mil pitch) and ssop (25-mil pitch) packages industrial temperature range of ? 40?c to +85?c ? cc = 5v 10% cy74fct16374t features: 64 ma sink current, 32 ma source current typical v olp (ground bounce) <1.0v at v cc = 5v, t a = 25?c CY74FCT162374T features: balanced 24 ma output drivers reduced system switching noise typical v olp (ground bounce) <0.6v at v cc = 5v, t a = 25?c functional description cy74fct16374t and CY74FCT162374T are 16-bit d-type registers designed for use as buffered registers in high-speed, low power bus applications. these devices can be used as two independent 8-bit registers or as a single 16-bit register by connecting the output enable (oe) and clock (clk) inputs. flow-through pinout and small shrink packaging aid in simplifying board layout. this device is fully speci?d for partial-power-down applications using i off . the i off circuitry disables the outputs, preventing damaging current back?w through the device when it is powered down. the cy74fct16374t is ideally suited for driving high-capacitance loads and low-impedance backplanes. the CY74FCT162374T has 24-ma balanced output drivers with current limiting resistors in the outputs. this reduces the need for external terminating resistors and provides for minimal undershoot and reduced ground bounce. the CY74FCT162374T is ideal for driving transmission lines. logic block diagrams pin configuration d c 1 oe fct162374-1 1 clk 1 d 1 1 o 1 to 7 other channels d c 2 oe fct162374-2 2 clk 2 d 1 2 o 1 fct162374-3 gnd 1 2 3 4 5 6 7 8 9 10 11 12 33 32 31 30 29 25 26 27 28 36 35 1 oe 34 ssop/tssop top view 13 14 15 16 17 18 19 20 21 22 23 24 45 44 43 42 41 37 38 39 40 48 47 46 1 o 1 1 o 2 1 o 3 1 o 4 1 d 1 1 d 2 1 d 3 1 d 4 1 clk gnd gnd v cc 1 o 7 1 o 8 1 o 5 1 o 6 1 d 5 1 d 6 1 d 7 1 d 8 v cc gnd gnd 2 o 3 2 o 4 2 o 1 2 o 2 2 d 1 2 d 2 2 d 3 2 d 4 gnd gnd v cc 2 o 7 2 o 8 2 o 5 2 o 6 2 d 5 2 d 6 2 d 7 2 d 8 v cc gnd 2 oe 2 clk to 7 other channels
cy74fct16374t CY74FCT162374T 2 maximum ratings [2, 3] (above which the useful life may be impaired. for user guidelines, not tested.) storage temperature .............................. ? 55 c to +125 c ambient temperature with power applied .......................................... ? 55 c to +125 c dc input voltage ................................................. ? 0.5v to +7.0v dc output voltage .............................................. ? 0.5v to +7.0v dc output current (maximum sink current/pin) ............................? 60 to +120 ma power dissipation ..........................................................1.0w static discharge voltage............................................>2001v (per mil-std-883, method 3015) function table [1] inputs outputs function d clk oe o x l h z high-z x h h z l l l load register h l h l h z h h z pin description name description d data inputs clk clock inputs oe three-state output enable inputs (active low) o three-state outputs operating range range ambient temperature v cc industrial ? 40 c to +85 c 5v 10% electrical characteristics over the operating range parameter description test conditions min. typ. [4] max. unit v ih input high voltage 2.0 v v il input low voltage 0.8 v v h input hysteresis [5] 100 mv v ik input clamp diode voltage v cc =min., i in = ? 18 ma ? 0.7 ? 1.2 v i ih input high current v cc =max., v i =v cc 1 a i il input low current v cc =max., v i =gnd 1 a i ozh high impedance output current (three-state output pins) v cc =max., v out =2.7v 1 a i ozl high impedance output current (three-state output pins) v cc =max., v out =0.5v 1 a i os short circuit current [6] v cc =max., v out =gnd ? 80 ? 140 ? 200 ma i o output drive current [6] v cc =max., v out =2.5v ? 50 ? 180 ma i off power-off disable v cc =0v, v out 4.5v [7] 1 a output drive characteristics for cy74fct16374t parameter description test conditions min. typ. [4] max. unit v oh output high voltage v cc =min., i oh = ? 3 ma 2.5 3.5 v v cc =min., i oh = ? 15 ma 2.4 3.5 v v cc =min., i oh = ? 32 ma 2.0 3.0 v v ol output low voltage v cc =min., i ol =64 ma 0.2 0.55 v notes: 1. h = high voltage level. l = low voltage level. x = don? care. z = high impedance. = low-to-high transition. 2. operation beyond the limits set forth may impair the useful life of the device. unless otherwise noted, these limits are over the operating free-air temperature range. 3. unused inputs must always be connected to an appropriate logic voltage level, preferably either v cc or ground. 4. typical values are at v cc = 5.0v, t a = +25?c ambient. 5. this parameter is speci?d but not tested. 6. not more than one output should be shorted at a time. duration of short should not exceed one second. the use of high-speed test apparatus and/or sampl e and hold techniques are preferable in order to minimize internal chip heating and more accurately re?ct operational values. ot herwise prolonged shorting of a high output may raise the chip temperature well above normal and thereby cause invalid readings in other parametric tests. in any sequence of param eter tests, i os tests should be performed last. 7. tested at +25?c.
cy74fct16374t CY74FCT162374T 3 output drive characteristics for CY74FCT162374T parameter description test conditions min. typ. [4] max. unit i odl output low current [6] v cc =5v, v in =v ih or v il , v out =1.5v 60 115 150 ma i odh output high current [6] v cc =5v, v in =v ih or v il , v out =1.5v ? 60 ? 115 ? 150 ma v oh output high voltage v cc =min., i oh = ? 24 ma 2.4 3.3 v v ol output low voltage v cc =min., i ol =24 ma 0.3 0.55 v capacitance [5] (t a = +25?c, f = 1.0 mhz) parameter description test conditions typ. [4] max. unit c in input capacitance v in = 0v 4.5 6.0 pf c out output capacitance v out = 0v 5.5 8.0 pf power supply characteristics parameter description test conditions typ. [4] max. unit i cc quiescent power supply current v cc =max. v in 0.2v, v in v cc ? 0.2v 5 500 a ? i cc quiescent power supply current (ttl inputs high) v cc =max. v in =3.4v [8] 0.5 1.5 ma i ccd dynamic power supply current [9] v cc =max., one input toggling, 50% duty cycle, outputs open, oe=gnd v in =v cc or v in =gnd 60 100 a/ mhz i c total power supply current [10] v cc =max., f 0 =10 mhz, f 1 =5 mhz, 50% duty cycle, outputs open, one bit toggling, oe=gnd v in =v cc or v in =gnd 0.6 1.5 ma v in =3.4v or v in =gnd 1.1 3.0 ma v cc =max., f 0 =10 mhz, f 1 =2.5 mhz, 50% duty cycle, outputs open, sixteen bits toggling, oe=gnd v in =v cc or v in =gnd 3.0 5.5 [11] ma v in =3.4v or v in =gnd 7.5 19.0 [11] ma note: 8. per ttl driven input (v in =3.4v); all other inputs at v cc or gnd. 9. this parameter is not directly testable, but is derived for use in total power supply calculations. 10. i c =i quiescent + i inputs + i dynamic i c =i cc + ? i cc d h n t +i ccd (f 0 /2 + f 1 n 1 ) i cc = quiescent current with cmos input levels ? 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 0 = clock frequency for registered devices, otherwise zero f 1 = input signal frequency n 1 = number of inputs changing at f 1 all currents are in milliamps and all frequencies are in megahertz. 11. values for these conditions are examples of the i cc formula. these limits are speci?d but not tested.
cy74fct16374t CY74FCT162374T 4 switching characteristics over the operating range [12] cy74fct16374t CY74FCT162374T cy74fct16374at cy74fct162374at fig. no. [13] parameter description min. max. min. max. unit t plh t phl propagation delay clk to o 2.0 10.0 2.0 6.5 ns 1, 5 t pzh t pzl output enable time 1.5 12.5 1.5 6.5 ns 1, 7, 8 t phz t plz output disable time 1.5 8.0 1.5 5.5 ns 1, 7, 8 t su set-up time high or low, d to clk 2.0 2.0 ns 4 t h hold time high or low, d to clk 1.5 1.5 ns 4 t w clk pulse width high or low 5.0 5.0 ns 5 t sk(o) output skew [14] 0.5 0.5 ns cy74fct16374ct cy74fct162374ct fig. no. [13] parameter description min. max. unit t plh t phl propagation delay clk to o 2.0 5.2 ns 1, 5 t pzh t pzl output enable time 1.5 5.5 ns 1, 7, 8 t phz t plz output disable time 1.5 5.0 ns 1, 7, 8 t su set-up time high or low, d to clk 2.0 ns 4 t h hold time high or low, d to clk 1.5 ns 4 t w clk pulse width high or low 3.3 ns 5 t sk(o) output skew [14] 0.5 ns notes: 12. minimum limits are speci?d but not tested on propagation delays. 13. see ?arameter measurement information?in the general information section. 14. skew between any two outputs of the same package switching in the same direction. this parameter is ensured by design.
cy74fct16374t CY74FCT162374T 5 ordering information cy74fct16374t speed (ns) ordering code package name package type operating range 5.2 cy74fct16374ctpact z48 48-lead (240-mil) tssop industrial cy74fct16374ctpvc/pvct o48 48-lead (300-mil) ssop 6.5 cy74fct16374atpact z48 48-lead (240-mil) tssop industrial cy74fct16374atpvc/pvct o48 48-lead (300-mil) ssop 10.0 cy74fct16374tpvc/pvct o48 48-lead (300-mil) ssop industrial ordering information CY74FCT162374T speed (ns) ordering code package name package type operating range 5.2 74fct162374ctpact z48 48-lead (240-mil) tssop industrial cy74fct162374ctpvc o48 48-lead (300-mil) ssop 74fct162374ctpvct o48 48-lead (300-mil) ssop 6.5 74fct162374atpact z48 48-lead (240-mil) tssop industrial cy74fct162374atpvc o48 48-lead (300-mil) ssop 74fct162374atpvct o48 48-lead (300-mil) ssop 10.0 CY74FCT162374Tpvc/pvct o48 48-lead (300-mil) ssop industrial
cy74fct16374t CY74FCT162374T 6 package diagrams 48-lead shrunk small outline package o48 48-lead thin shrunk small outline package z48
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