74hc123a ? 2013 rochester electronics, llc. all rights reserved 04242013 specifcation number 74hc123-i (f) rev c page 1 of 4 ? 2001 fairchild semiconductor corporation ds005206 www.fairchildsemi.com september 1983 revised may 2001 mm74hc123a dual retriggerable monostable multivibrator mm74hc123a dual retriggerable monostable multivibrator general description the mm74hc123a high speed monostable multivibrators (one shots) utilize advanced silicon-gate cmos technol- ogy. they feature speeds comparable to low power schot- tky ttl circuitry while retaining the low power and high noise immunity characteristic of cmos circuits. each multivibrator features both a negative, a, and a posi- tive, b, transition triggered input, either of which can be used as an inhibit input. also included is a clear input that when taken low resets the one shot. the mm74hc123a can be triggered on the positive transition of the clear while a is held low and b is held high. the mm74hc123a is retriggerable. that is it may be trig- gered repeatedly while their outputs are generating a pulse and the pulse will be extended. pulse width stability over a wide range of temperature and supply is achieved using linear cmos techniques. the out- put pulse equation is simply: pw = (r ext ) (c ext ); where pw is in seconds, r is in ohms, and c is in farads. all inputs are protected from damage due to static discharge by diodes to v cc and ground. features typical propagation delay: 25 ns wide power supply range: 2vC6v low quiescent current: 80 a maximum (74hc series) low input current: 1 a maximum fanout of 10 ls-ttl loads simple pulse width formula t = rc wide pulse range: 400 ns to (typ) part to part variation: 5% (typ) schmitt trigger a & b inputs allow rise and fall times to be as slow as one second ordering code: devices also available in tape and reel. specify by appending the suffix letter ?x ? to the ordering code. connection diagram top view timing component note: pin 6 and pin 14 must be hard-wired to gnd. order number package number package description MM74HC123AM m16a 16-lead small outline integrated circuit (soic), jedec ms-012, 0.150" narrow mm74hc123asj m16d 16-lead small outline package (sop), eiaj type ii, 5.3mm wide MM74HC123AMtc mtc16 16-lead thin shrink small outline package (tssop), jedec mo-153, 4.4mm wide mm74hc123an n16e 16-lead plastic dual-in-line package (pdip), jedec ms-001, 0.300" wide ? 2001 fairchild semiconductor corporation ds005206 www.fairchildsemi.com september 1983 revised may 2001 mm74hc123a dual retriggerable monostable multivibrator mm74hc123a dual retriggerable monostable multivibrator general description the mm74hc123a high speed monostable multivibrators (one shots) utilize advanced silicon-gate cmos technol- ogy. they feature speeds comparable to low power schot- tky ttl circuitry while retaining the low power and high noise immunity characteristic of cmos circuits. each multivibrator features both a negative, a, and a posi- tive, b, transition triggered input, either of which can be used as an inhibit input. also included is a clear input that when taken low resets the one shot. the mm74hc123a can be triggered on the positive transition of the clear while a is held low and b is held high. the mm74hc123a is retriggerable. that is it may be trig- gered repeatedly while their outputs are generating a pulse and the pulse will be extended. pulse width stability over a wide range of temperature and supply is achieved using linear cmos techniques. the out- put pulse equation is simply: pw = (r ext ) (c ext ); where pw is in seconds, r is in ohms, and c is in farads. all inputs are protected from damage due to static discharge by diodes to v cc and ground. features typical propagation delay: 25 ns wide power supply range: 2vC6v low quiescent current: 80 a maximum (74hc series) low input current: 1 a maximum fanout of 10 ls-ttl loads simple pulse width formula t = rc wide pulse range: 400 ns to (typ) part to part variation: 5% (typ) schmitt trigger a & b inputs allow rise and fall times to be as slow as one second ordering code: devices also available in tape and reel. specify by appending the suffix letter ?x ? to the ordering code. connection diagram top view timing component note: pin 6 and pin 14 must be hard-wired to gnd. order number package number package description MM74HC123AM m16a 16-lead small outline integrated circuit (soic), jedec ms-012, 0.150" narrow mm74hc123asj m16d 16-lead small outline package (sop), eiaj type ii, 5.3mm wide MM74HC123AMtc mtc16 16-lead thin shrink small outline package (tssop), jedec mo-153, 4.4mm wide mm74hc123an n16e 16-lead plastic dual-in-line package (pdip), jedec ms-001, 0.300" wide rochester electronics guarantees performance of its semiconductor products to the original oem specifcations. typical values are for reference purposes only. certain minimum or maximum ratings may be based on product characterization, design, simulation, or sample testing. rochester electronics reserves the right to make changes without further notice to any specifcation herein. rochester part number fairchild part number package temperature mm74hc123an mm74hc123an pdip-16 -40 to +85c MM74HC123AM MM74HC123AM sop-16, plastic -40 to +85c MM74HC123AMtc MM74HC123AMtc tssop-16, plastic -40 to +85c mm74hc123asj mm74hc123asj sop-16, plastic -40 to +85c rochester ordering guide *most products can also be offered as rohs compliant, designated by a Cg suffx. please contact factory for more information. please contact factory for specifc package availability and military/aerospace specifcations/availability.
page 2 of 4 www.fairchildsemi.com 2 mm74hc123a truth table h = high level l = low level = transition from low-to-high = transition from high-to-low = one high level pulse = one low level pulse x = irrelevant logic diagram inputs outputs clear ab q q l xx l h x hx l h x xl l h hl h h lh 74hc123a specifcation number 74hc123-i (f) rev c
page 3 of 4 3 www.fairchildsemi.com mm74hc123a absolute maximum ratings (note 1) (note 2) recommended operating conditions note 1: maximum ratings are those values beyond which damage to the device may occur. note 2: unless otherwise specified all voltages are referenced to ground. note 3: power dissipation temperature derating: plastic ?n ? package: ? 12mw/ c from 65 c to 85 c dc electrical characteristics (note 4) note 4: for a power supply of 5v 10% the worst-case output voltages (v oh , v ol ) occur for hc at 4.5v. thus the 4.5v values should be used when design- ing with this supply. worst-case v ih and v il occur at v cc = 5.5v and 4.5v respectively. (the v ih value at 5.5v is 3.85v.) the worst-case leakage current (i in , i cc , and i oz ) occur for cmos at the higher voltage and so the 6.0v values should be used. supply voltage (v cc ) ? 0.5v to + 7.0v dc input voltage (v in ) ? 1.5v to v cc + 1.5v dc output voltage (v out ) ? 0.5v to v cc + 0.5v clamp diode current (i ik , i ok ) 20 ma dc output current, per pin (i out ) 25 ma dc v cc or gnd current, per pin (i cc ) 50 ma storage temperature range (t stg ) ? 65 c to + 150 c power dissipation (p d ) (note 3) 600 mw s.o. package only 500 mw lead temperature (t l ) (soldering 10 seconds) 260 c min max units supply voltage (v cc ) 26 v dc input or output voltage 0 v cc v (v in , v out ) operating temperature range (t a ) ? 40 + 85 c input rise or fall times (clear input) (t r , t f )v cc = 2.0v 1000 ns v cc = 4.5v 500 ns v cc = 6.0v 400 ns symbol parameter conditions v cc t a = 25 ct a = ? 40 to 85 ct a = ? 55 to 125 c units typ guaranteed limits v ih minimum high level input 2.0v 1.5 1.5 1.5 v voltage 4.5v 3.15 3.15 3.15 v 6.0v 4.2 4.2 4.2 v v il maximum low level input 2.0v 0.3 0.3 0.3 v voltage 4.5v 0.9 0.9 0.9 v 6.0v 1.2 1.2 1.2 v v oh minimum high level v in = v ih or v il output voltage |i out | 20 a 2.0v 2.0 1.9 1.9 1.9 v 4.5v 4.5 4.4 4.4 4.4 v 6.0v 6.0 5.9 5.9 5.9 v v in = v ih or v il v |i out | 4.0 ma 4.5v 4.2 3.98 3.84 3.7 v |i out | 5.2 ma 6.0v 5.7 5.48 5.34 5.2 v v ol maximum low level v in = v ih or v il output voltage |i out | 20 a 2.0v 0 0.1 0.1 0.1 v 4.5v 0 0.1 0.1 0.1 v 6.0v 0 0.1 0.1 0.1 v v in = v ih or v il v |i out | 4 ma 4.5v 0.2 0.26 0.33 0.4 v |i out | 5.2 ma 6.0v 0.2 0.26 0.33 0.4 v i in maximum input current v in = v cc or gnd 6.0v 0.5 5.0 5.0 a (pins 7, 15) i in maximum input current v in = v cc or gnd 6.0v 0.1 1.0 1.0 a (all other pins) i cc maximum quiescent supply v in = v cc or gnd 6.0v 8.0 80 160 a current (standby) i out = 0 a i cc maximum active supply v in = v cc or gnd 2.0v 36 80 110 130 a current (per r/c ext = 0.5v cc 4.5v 0.33 1.0 1.3 1.6 ma monostable) 6.0v 0.7 2.0 2.6 3.2 ma 74hc123a specifcation number 74hc123-i (f) rev c
page 4 of 4 www.fairchildsemi.com 4 mm74hc123a ac electrical characteristics v cc = 5v, t a = 25 c, c l = 15 pf, t r = t f = 6 ns ac electrical characteristics c l = 50 pf t r = t f = 6 ns (unless otherwise specified) note 5: c pd determines the no load dynamic power consumption, p d = c pd v cc 2 f + i cc v cc , and the no load dynamic current consumption, i s = c pd v cc f + i cc . symbol parameter conditions typ limit units t plh maximum trigger propagation delay 22 33 ns a, b or clear to q t phl maximum trigger propagation delay 25 42 ns a, b or clear to q t phl maximum propagation delay, clear to q 20 27 ns t plh maximum propagation delay, clear to q 22 33 ns t w minimum pulse width, a, b or clear 14 26 ns t rem minimum clear removal time 0 ns t wq(min) minimum output pulse width c ext = 28 pf 400 ns r ext = 2 k ? t wq output pulse width c ext = 1000 pf 10 s r ext = 10 k ? symbol parameter conditions v cc t a = 25 ct a = ? 40 to 85 ct a = ? 55 to 125 c units typ guaranteed limits t plh maximum trigger propagation 2.0v 77 169 194 210 ns delay, a, b or clear to q 4.5v 26 42 51 57 ns 6.0v 21 32 39 44 ns t phl maximum trigger propagation 2.0v 88 197 229 250 ns delay, a, b or clear to q 4.5v 29 48 60 67 ns 6.0v 24 38 46 51 ns t phl maximum propagation delay 2.0v 54 114 132 143 ns clear to q 4.5v 23 34 41 45 ns 6.0v 19 28 33 36 ns t plh maximum propagation delay 2.0v 56 116 135 147 ns clear to q 4.5v 25 36 42 46 ns 6.0v 20 29 34 37 ns t w minimum pulse width 2.0v 57 123 144 157 ns a, b, clear 4.5v 17 30 37 42 ns 6.0v 12 21 27 30 ns t rem minimum clear 2.0v 0 0 0 ns removal time 4.5v 0 0 0 ns 6.0v 0 0 0 ns t tlh , t thl maximum output 2.0v 30 75 95 110 ns rise and fall time 4.5v 8 15 19 22 ns 6.0v 7 13 16 19 ns t wq(min) minimum output c ext = 28 pf 2.0v 1.5 s pulse width r ext = 2 k ? 4.5v 450 ns r ext = 6 k ? (v cc = 2v) 6.0v 380 ns t wq output pulse width c ext = 0.1 f min 5.0v 1 0.9 0.86 0.85 ms r ext = 10 k ? max 5.0v 1 1.1 1.14 1.15 ms c in maximum input 12 20 20 20 pf capacitance (pins 7 & 15) c in maximum input 6 10 10 10 pf capacitance (other inputs) c pd power dissipation (note 5) 70 pf capacitance rochester electronics guarantees performance of its semiconductor products to the original oem specifcations. typical values are for reference purposes only. certain minimum or maximum ratings may be based on product characterization, design, simulation, or sample testing. rochester electronics reserves the right to make changes without further notice to any specifcation herein. 74hc123a specifcation number 74hc123-i (f) rev c
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