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1. general description the 74hc123; 74hct123 are high-speed si-gate cmos devices and are pin compatible with low-power schottky ttl (lsttl). they are speci?ed in compliance with jedec standard no. 7a. the 74hc123; 74hct123 are dual retriggerable monostable multivibrators with output pulse width control by three methods: 1. the basic pulse time is programmed by selection of an external resistor (r ext ) and capacitor (c ext ). 2. once triggered, the basic output pulse width may be extended by retriggering the gated active low-going edge input (n a) or the active high-going edge input (nb). by repeating this process, the output pulse period (nq = high, n q = low) can be made as long as desired. alternatively an output delay can be terminated at any time by a low-going edge on input n rd, which also inhibits the triggering. 3. an internal connection from n rd to the input gates makes it possible to trigger the circuit by a high-going signal at input n rd as shown in the function table. schmitt-trigger action in the n a and nb inputs, makes the circuit highly tolerant to slower input rise and fall times. the 74hc123; 74hct123 is identical to the 74hc423; 74hct423 but can be triggered via the reset input. 2. features n dc triggered from active high or active low inputs n retriggerable for very long pulses up to 100 % duty factor n direct reset terminates output pulse n schmitt-trigger action on all inputs except for the reset input n esd protection: u hbm eia/jesd22-a114-c exceeds 2000 v u mm eia/jesd22-a115-a exceeds 200 v n speci?ed from - 40 cto+85 c and from - 40 c to +125 c 74hc123; 74hct123 dual retriggerable monostable multivibrator with reset rev. 04 16 june 2006 product data sheet
74hc_hct123_4 ? koninklijke philips electronics n.v. 2006. all rights reserved. product data sheet rev. 04 16 june 2006 2 of 28 philips semiconductors 74hc123; 74hct123 dual retriggerable monostable multivibrator with reset 3. ordering information table 1. ordering information type number package temperature range name description version 74hc123 74hc123n - 40 c to +125 c dip16 plastic dual in-line package; 16 leads (300 mil); long body sot38-1 74hc123d - 40 c to +125 c so16 plastic small outline package; 16 leads; body width 3.9 mm sot109-1 74hc123db - 40 c to +125 c ssop16 plastic shrink small outline package; 16 leads; body width 5.3 mm sot338-1 74hc123pw - 40 c to +125 c tssop16 plastic thin shrink small outline package; 16 leads; body width 4.4 mm sot403-1 74hc123bq - 40 c to +125 c dhvqfn16 plastic dual in-line compatible thermal enhanced very thin quad ?at package; no leads; 16 terminals; body 2.5 3.5 0.85 mm sot763-1 74hct123 74hct123n - 40 c to +125 c dip16 plastic dual in-line package; 16 leads (300 mil); long body sot38-1 74hct123d - 40 c to +125 c so16 plastic small outline package; 16 leads; body width 3.9 mm sot109-1 74hct123db - 40 c to +125 c ssop16 plastic shrink small outline package; 16 leads; body width 5.3 mm sot338-1 74hct123pw - 40 c to +125 c tssop16 plastic thin shrink small outline package; 16 leads; body width 4.4 mm sot403-1
74hc_hct123_4 ? koninklijke philips electronics n.v. 2006. all rights reserved. product data sheet rev. 04 16 june 2006 3 of 28 philips semiconductors 74hc123; 74hct123 dual retriggerable monostable multivibrator with reset 4. functional diagram fig 1. functional diagram fig 2. logic symbol fig 3. iec logic symbol 1q q 2rd r d s 13 1rext/cext 15 1cext 14 1q q 4 9 001aaa610 1rd 2a 11a 10 2b 2 11 3 1b t q r d s 2rext/cext 7 2cext 6 2q 5 q 2q 12 t 1q q 2rd r d s 2rext/cext 13 7 1rext/cext 15 2cext 6 1cext 14 2q 5 1q q 4 2q 12 9 mna515 1rd 2a 11a 10 2b 2 11 3 1b t mna516 cx & 6 5 12 rcx r 7 9 11 10 cx & 14 13 4 rcx r 15 1 3 2
74hc_hct123_4 ? koninklijke philips electronics n.v. 2006. all rights reserved. product data sheet rev. 04 16 june 2006 4 of 28 philips semiconductors 74hc123; 74hct123 dual retriggerable monostable multivibrator with reset fig 4. logic diagram mna518 rext/cext v cc v cc v cc r rd a b r cl cl cl cl cl q q r r
74hc_hct123_4 ? koninklijke philips electronics n.v. 2006. all rights reserved. product data sheet rev. 04 16 june 2006 5 of 28 philips semiconductors 74hc123; 74hct123 dual retriggerable monostable multivibrator with reset 5. pinning information 5.1 pinning 5.2 pin description (1) the die substrate is attached to this pad using conductive die attach material. it can not be used as supply pin or input. fig 5. pin con?guration for dip16, so16, ssop16 and tssop16 fig 6. pin con?guration for dhvqfn16 74hc123 74hct123 1a v cc 1b 1rext/cext 1rd 1cext 1q 1q 2q 2q 2cext 2rd 2rext/cext 2b gnd 2a 001aaa698 1 2 3 4 5 6 7 8 10 9 12 11 14 13 16 15 001aaf046 74hc123bq 2rext/cext 2b 2cext 2rd 2q 2q 1q 1q 1rd 1cext 1b 1rext/cext gnd 2a 1a v cc transparent top view 7 10 6 11 5 12 4 13 3 14 2 15 8 9 1 16 terminal 1 index area gnd (1) table 2. pin description symbol pin description 1 a 1 negative-edge triggered input 1 1b 2 positive-edge triggered input 1 1 rd 3 direct reset low and positive-edge triggered input 1 1 q 4 active low output 1 2q 5 active high output 2 2cext 6 external capacitor connection 2 2rext/cext 7 external resistor and capacitor connection 2 gnd 8 ground (0 v) 2 a 9 negative-edge triggered input 2 2b 10 positive-edge triggered input 2 2 rd 11 direct reset low and positive-edge triggered input 2 2 q 12 active low output 2 1q 13 active high output 1 1cext 14 external capacitor connection 1 1rext/cext 15 external resistor and capacitor connection 1 v cc 16 supply voltage
74hc_hct123_4 ? koninklijke philips electronics n.v. 2006. all rights reserved. product data sheet rev. 04 16 june 2006 6 of 28 philips semiconductors 74hc123; 74hct123 dual retriggerable monostable multivibrator with reset 6. functional description [1] h = high voltage level l = low voltage level x = dont care - = low-to-high transition = high-to-low transition = one high level output pulse = one low level output pulse [2] if the monostable was triggered before this condition was established, the pulse will continue as programmed. table 3. function table [1] input output n rd n a nb nq n q l xxl h xhxl [2] h [2] xxl l [2] h [2] hl - h h - lh
74hc_hct123_4 ? koninklijke philips electronics n.v. 2006. all rights reserved. product data sheet rev. 04 16 june 2006 7 of 28 philips semiconductors 74hc123; 74hct123 dual retriggerable monostable multivibrator with reset 7. limiting values [1] for dip16 package: p tot derates linearly with 12 mw/k above 70 c. [2] for so16 package: p tot derates linearly with 8 mw/k above 70 c. [3] for ssop16 and tssop16 packages: p tot derates linearly with 5.5 mw/k above 60 c. [4] for dhvqfn16 package: p tot derates linearly with 4.5 mw/k above 60 c. 8. recommended operating conditions table 4. limiting values in accordance with the absolute maximum rating system (iec 60134). voltages are referenced to gnd (ground = 0 v). symbol parameter conditions min max unit v cc supply voltage - 0.5 +7 v i ik input clamping current v i < - 0.5 v or v i >v cc + 0.5 v - 20 ma i ok output clamping current v o < - 0.5 v or v o >v cc + 0.5 v - 20 ma i o output current except for pins nrext/cext; v o = - 0.5 v to (v cc + 0.5 v) - 25 ma i cc quiescent supply current - 50 ma i gnd ground current - - 50 ma t stg storage temperature - 65 +150 c p tot total power dissipation dip16 package [1] - 750 mw so16 package [2] - 500 mw ssop16 package [3] - 500 mw tssop16 package [3] - 500 mw dhvqfn16 package [4] - 500 mw table 5. recommended operating conditions symbol parameter conditions min typ max unit 74hc123 v cc supply voltage 2.0 5.0 6.0 v v i input voltage 0 - v cc v v o output voltage 0 - v cc v t r , t f input rise and fall time n rd input v cc = 2.0 v - - 1000 ns v cc = 4.5 v - 6.0 500 ns v cc = 6.0 v - - 400 ns t amb ambient temperature - 40 +25 +125 c 74hct123 v cc supply voltage 4.5 5.0 5.5 v v i input voltage 0 - v cc v v o output voltage 0 - v cc v t r , t f input rise and fall time n rd input; v cc = 4.5 v - 6.0 500 ns t amb ambient temperature - 40 +25 +125 c
74hc_hct123_4 ? koninklijke philips electronics n.v. 2006. all rights reserved. product data sheet rev. 04 16 june 2006 8 of 28 philips semiconductors 74hc123; 74hct123 dual retriggerable monostable multivibrator with reset 9. static characteristics table 6. static characteristics 74hc123 at recommended operating conditions; voltages are referenced to gnd (ground = 0 v). symbol parameter conditions min typ max unit t amb =25 c v ih high-state input voltage v cc = 2.0 v 1.5 1.2 - v v cc = 4.5 v 3.15 2.4 - v v cc = 6.0 v 4.2 3.2 - v v il low-state input voltage v cc = 2.0 v - 0.8 0.5 v v cc = 4.5 v - 2.1 1.35 v v cc = 6.0 v - 2.8 1.8 v v oh high-state output voltage v i =v ih or v il i o = - 20 m a; v cc = 2.0 v 1.9 2.0 - v i o = - 20 m a; v cc = 4.5 v 4.4 4.5 - v i o = - 20 m a; v cc = 6.0 v 5.9 6.0 - v i o = - 4 ma; v cc = 4.5 v 3.98 4.32 - v i o = - 5.2 ma; v cc = 6.0 v 5.48 5.81 - v v ol low-state output voltage v i =v ih or v il i o =20 m a; v cc = 2.0 v - 0 0.1 v i o =20 m a; v cc = 4.5 v - 0 0.1 v i o =20 m a; v cc = 6.0 v - 0 0.1 v i o = 4 ma; v cc = 4.5 v - 0.15 0.26 v i o = 5.2 ma; v cc = 6.0 v - 0.16 0.26 v i li input leakage current v i =v cc or gnd; v cc = 6.0 v - - 0.1 m a i cc quiescent supply current v i =v cc or gnd; i o = 0 a; v cc = 6.0 v - - 8.0 m a c i input capacitance - 3.5 - pf t amb = - 40 c to +85 c v ih high-state input voltage v cc = 2.0 v 1.5 - - v v cc = 4.5 v 3.15 - - v v cc = 6.0 v 4.2 - - v v il low-state input voltage v cc = 2.0 v - - 0.5 v v cc = 4.5 v - - 1.35 v v cc = 6.0 v - - 1.8 v v oh high-state output voltage v i =v ih or v il i o = - 20 m a; v cc = 2.0 v 1.9 - - v i o = - 20 m a; v cc = 4.5 v 4.4 - - v i o = - 20 m a; v cc = 6.0 v 5.9 - - v i o = - 4 ma; v cc = 4.5 v 3.84 - - v i o = - 5.2 ma; v cc = 6.0 v 5.34 - - v
74hc_hct123_4 ? koninklijke philips electronics n.v. 2006. all rights reserved. product data sheet rev. 04 16 june 2006 9 of 28 philips semiconductors 74hc123; 74hct123 dual retriggerable monostable multivibrator with reset v ol low-state output voltage v i =v ih or v il i o =20 m a; v cc = 2.0 v - - 0.1 v i o =20 m a; v cc = 4.5 v - - 0.1 v i o =20 m a; v cc = 6.0 v - - 0.1 v i o = 4 ma; v cc = 4.5 v - - 0.33 v i o = 5.2 ma; v cc = 6.0 v - - 0.33 v i li input leakage current v i =v cc or gnd; v cc = 6.0 v - - 1.0 m a i cc quiescent supply current v i =v cc or gnd; i o = 0 a; v cc = 6.0 v - - 80 m a t amb = - 40 c to +125 c v ih high-state input voltage v cc = 2.0 v 1.5 - - v v cc = 4.5 v 3.15 - - v v cc = 6.0 v 4.2 - - v v il low-state input voltage v cc = 2.0 v - - 0.5 v v cc = 4.5 v - - 1.35 v v cc = 6.0 v - - 1.8 v v oh high-state output voltage v i =v ih or v il i o = - 20 m a; v cc = 2.0 v 1.9 - - v i o = - 20 m a; v cc = 4.5 v 4.4 - - v i o = - 20 m a; v cc = 6.0 v 5.9 - - v i o = - 4 ma; v cc = 4.5 v 3.7 - - v i o = - 5.2 ma; v cc = 6.0 v 5.2 - - v v ol low-state output voltage v i =v ih or v il i o =20 m a; v cc = 2.0 v - - 0.1 v i o =20 m a; v cc = 4.5 v - - 0.1 v i o =20 m a; v cc = 6.0 v - - 0.1 v i o = 4 ma; v cc = 4.5 v - - 0.4 v i o = 5.2 ma; v cc = 6.0 v - - 0.4 v i li input leakage current v i =v cc or gnd; v cc = 6.0 v - - 1.0 m a i cc quiescent supply current v i =v cc or gnd; i o = 0 a; v cc = 6.0 v - - 160 m a table 6. static characteristics 74hc123 continued at recommended operating conditions; voltages are referenced to gnd (ground = 0 v). symbol parameter conditions min typ max unit table 7. static characteristics 74hct123 at recommended operating conditions; voltages are referenced to gnd (ground = 0 v). symbol parameter conditions min typ max unit t amb =25 c v ih high-state input voltage v cc = 4.5 v to 5.5 v 2.0 1.6 - v v il low-state input voltage v cc = 4.5 v to 5.5 v - 1.2 0.8 v v oh high-state output voltage v i =v ih or v il ; v cc = 4.5 v i o = - 20 m a 4.4 4.5 - v i o = - 4 ma 3.98 4.32 - v
74hc_hct123_4 ? koninklijke philips electronics n.v. 2006. all rights reserved. product data sheet rev. 04 16 june 2006 10 of 28 philips semiconductors 74hc123; 74hct123 dual retriggerable monostable multivibrator with reset v ol low-state output voltage v i =v ih or v il ; v cc = 4.5 v i o =20 m a - 0 0.1 v i o = 4.0 ma - 0.15 0.26 v i li input leakage current v i =v cc or gnd; v cc = 5.5 v - - 0.1 m a i cc quiescent supply current v i =v cc or gnd; i o = 0 a; v cc = 5.5 v - - 8.0 m a d i cc additional quiescent supply current per input pin; v i =v cc - 2.1 v and other inputs at v cc or gnd; i o =0a; v cc = 4.5 v to 5.5 v pins n a, nb - 35 125 m a pin n rd - 50 180 m a c i input capacitance - 3.5 - pf t amb = - 40 c to +85 c v ih high-state input voltage v cc = 4.5 v to 5.5 v 2.0 - - v v il low-state input voltage v cc = 4.5 v to 5.5 v - - 0.8 v v oh high-state output voltage v i =v ih or v il ; v cc = 4.5 v i o = - 20 m a 4.4 - - v i o = - 4.0 ma 3.84 - - v v ol low-state output voltage v i =v ih or v il ; v cc = 4.5 v i o =20 m a - - 0.1 v i o = 4.0 ma - - 0.33 v i li input leakage current v i =v cc or gnd; v cc = 5.5 v - - 1.0 m a i cc quiescent supply current v i =v cc or gnd; i o = 0 a; v cc = 5.5 v - - 80 m a d i cc additional quiescent supply current per input pin; v i =v cc - 2.1 v and other inputs at v cc or gnd; i o =0a; v cc = 4.5 v to 5.5 v pins n a, nb - - 160 m a pin n rd - - 225 m a t amb = - 40 c to +125 c v ih high-state input voltage v cc = 4.5 v to 5.5 v 2.0 - - v v il low-state input voltage v cc = 4.5 v to 5.5 v - - 0.8 v v oh high-state output voltage v i =v ih or v il ; v cc = 4.5 v i o = - 20 m a 4.4 - - v i o = - 4 ma 3.7 - - v v ol low-state output voltage v i =v ih or v il ; v cc = 4.5 v i o =20 m a - - 0.1 v i o = 4.0 ma - - 0.4 v i li input leakage current v i =v cc or gnd; v cc = 5.5 v - - 1.0 m a i cc quiescent supply current v i =v cc or gnd; i o = 0 a; v cc = 5.5 v - - 160 m a table 7. static characteristics 74hct123 continued at recommended operating conditions; voltages are referenced to gnd (ground = 0 v). symbol parameter conditions min typ max unit
74hc_hct123_4 ? koninklijke philips electronics n.v. 2006. all rights reserved. product data sheet rev. 04 16 june 2006 11 of 28 philips semiconductors 74hc123; 74hct123 dual retriggerable monostable multivibrator with reset 10. dynamic characteristics d i cc additional quiescent supply current per input pin; v i =v cc - 2.1 v and other inputs at v cc or gnd; i o =0a; v cc = 4.5 v to 5.5 v pins n a, nb - - 170 m a pin n rd - - 245 m a table 7. static characteristics 74hct123 continued at recommended operating conditions; voltages are referenced to gnd (ground = 0 v). symbol parameter conditions min typ max unit table 8. dynamic characteristics 74hc123 voltages are referenced to gnd (ground = 0 v); c l = 50 pf unless otherwise speci?ed. for test circuit see figure 12 . symbol parameter conditions min typ max unit t amb = 25 c t phl , t plh propagation delay c ext = 0 pf; r ext = 5 k w ; see figure 9 n rd, n a, nb to nq or n qv cc = 2.0 v - 83 255 ns v cc = 4.5 v - 30 51 ns v cc = 5 v; c l = 15 pf - 26 - ns v cc = 6.0 v - 24 43 ns n rd (reset) to nq or n qv cc = 2.0 v - 66 215 ns v cc = 4.5 v - 24 43 ns v cc = 5 v; c l = 15 pf - 20 - ns v cc = 6.0 v - 19 37 ns t thl , t tlh output transition time see figure 9 v cc = 2.0 v - 19 75 ns v cc = 4.5 v - 7 15 ns v cc = 6.0 v - 6 13 ns t w pulse width n a low see figure 10 v cc = 2.0 v 100 8 - ns v cc = 4.5 v 20 3 - ns v cc = 6.0 v 17 2 - ns nb high see figure 10 v cc = 2.0 v 100 17 - ns v cc = 4.5 v 20 6 - ns v cc = 6.0 v 17 5 - ns n rd low see figure 11 v cc = 2.0 v 100 14 - ns v cc = 4.5 v 20 5 - ns v cc = 6.0 v 17 4 - ns nq high and n qlow v cc = 5.0 v; see figure 10 and 11 [1] c ext = 100 nf; r ext = 10 k w - 450 - m s c ext = 0 pf; r ext = 5 k w -75-ns
74hc_hct123_4 ? koninklijke philips electronics n.v. 2006. all rights reserved. product data sheet rev. 04 16 june 2006 12 of 28 philips semiconductors 74hc123; 74hct123 dual retriggerable monostable multivibrator with reset t rt retrigger time n a, nb c ext = 0 pf; r ext = 5 k w ; v cc = 5.0 v; see figure 10 [2] [3] - 110 - ns r ext external timing resistor see figure 7 v cc = 2.0 v 10 - 1000 k w v cc = 5.0 v 2 - 1000 k w c ext external timing capacitor v cc = 5.0 v; see figure 7 [3] no limits pf c pd power dissipation capacitance per monostable [4] [5] -54-pf t amb = - 40 c to +85 c t phl , t plh propagation delay c ext = 0 pf; r ext = 5 k w ; see figure 9 n rd, n a, nb to nq or n qv cc = 2.0 v - - 320 ns v cc = 4.5 v - - 64 ns v cc = 6.0 v - - 54 ns n rd (reset) to nq or n qv cc = 2.0 v - - 270 ns v cc = 4.5 v - - 54 ns v cc = 6.0 v - - 46 ns t thl , t tlh output transition time see figure 9 v cc = 2.0 v - - 95 ns v cc = 4.5 v - - 19 ns v cc = 6.0 v - - 16 ns t w pulse width n a low see figure 10 v cc = 2.0 v 125 - - ns v cc = 4.5 v 25 - - ns v cc = 6.0 v 21 - - ns nb high see figure 10 v cc = 2.0 v 125 - - ns v cc = 4.5 v 25 - - ns v cc = 6.0 v 21 - - ns n rd low see figure 11 v cc = 2.0 v 125 - - ns v cc = 4.5 v 25 - - ns v cc = 6.0 v 21 - - ns table 8. dynamic characteristics 74hc123 continued voltages are referenced to gnd (ground = 0 v); c l = 50 pf unless otherwise speci?ed. for test circuit see figure 12 . symbol parameter conditions min typ max unit
74hc_hct123_4 ? koninklijke philips electronics n.v. 2006. all rights reserved. product data sheet rev. 04 16 june 2006 13 of 28 philips semiconductors 74hc123; 74hct123 dual retriggerable monostable multivibrator with reset [1] for other r ext and c ext combinations see figure 7 . if c ext > 10 nf, the next formula is valid. t w =k r ext c ext , where: t w = typical output pulse width in ns; r ext = external resistor in k w ; c ext = external capacitor in pf; k = constant = 0.45 for v cc = 5.0 v and 0.55 for v cc = 2.0 v. the inherent test jig and pin capacitance at pins 15 and 7 (nrext/cext) is approximately 7 pf. [2] the time to retrigger the monostable multivibrator depends on the values of r ext and c ext . the output pulse width will only be extended when the time between the active-going edges of the trigger input pulses meets the minimum retrigger time. if c ext >10 pf, the next formula (at v cc = 5.0 v) for the setup time of a retrigger pulse is valid: t rt = 30 + 0.19 r ext c ext 0.9 +13 r ext 1.05 , where: t rt = retrigger time in ns; c ext = external capacitor in pf; r ext = external resistor in k w . the inherent test jig and pin capacitance at pins 15 and 7 (nrext/cext) is 7 pf. [3] when the device is powered-up, initiate the device via a reset pulse, when c ext <50pf. t amb = - 40 c to +125 c t phl , t plh propagation delay c ext = 0 pf; r ext = 5 k w ; see figure 9 n rd, n a, nb to nq or n qv cc = 2.0 v - - 385 ns v cc = 4.5 v - - 77 ns v cc = 6.0 v - - 65 ns n rd (reset) to nq or n qv cc = 2.0 v - - 325 ns v cc = 4.5 v - - 65 ns v cc = 6.0 v - - 55 ns t thl , t tlh output transition time see figure 9 v cc = 2.0 v - - 110 ns v cc = 4.5 v - - 22 ns v cc = 6.0 v - - 19 ns t w pulse width n a low see figure 10 v cc = 2.0 v 150 - - ns v cc = 4.5 v 30 - - ns v cc = 6.0 v 26 - - ns nb high see figure 10 v cc = 2.0 v 150 - - ns v cc = 4.5 v 30 - - ns v cc = 6.0 v 26 - - ns n rd low see figure 11 v cc = 2.0 v 150 - - ns v cc = 4.5 v 30 - - ns v cc = 6.0 v 26 - - ns table 8. dynamic characteristics 74hc123 continued voltages are referenced to gnd (ground = 0 v); c l = 50 pf unless otherwise speci?ed. for test circuit see figure 12 . symbol parameter conditions min typ max unit
74hc_hct123_4 ? koninklijke philips electronics n.v. 2006. all rights reserved. product data sheet rev. 04 16 june 2006 14 of 28 philips semiconductors 74hc123; 74hct123 dual retriggerable monostable multivibrator with reset [4] c pd is used to determine the dynamic power dissipation (p d in m w). p d =c pd v cc 2 f i + ? (c l v cc 2 f o ) + 0.75 c ext v cc 2 f o +d 16 v cc where: f i = input frequency in mhz; f o = output frequency in mhz; d = duty factor in %; c l = output load capacitance in pf; v cc = supply voltage in v; c ext = timing capacitance in pf; ? (c l v cc 2 f o ) sum of outputs. [5] the condition is v i = gnd to v cc . table 9. dynamic characteristics 74hct123 voltages are referenced to gnd (ground = 0 v); c l = 50 pf unless otherwise speci?ed. for test circuit see figure 12 . symbol parameter conditions min typ max unit t amb = 25 c t phl propagation delay c ext = 0 pf; r ext = 5 k w ; see figure 9 n rd, n a, nb to n qv cc = 4.5 v - 30 51 ns v cc = 5 v; c l =15pf - 26 - ns n rd (reset) to nq v cc = 4.5 v - 27 46 ns v cc = 5 v; c l =15pf - 23 - ns t plh propagation delay c ext = 0 pf; r ext = 5 k w ; see figure 9 n rd, n a, nb to nq v cc = 4.5 v - 28 51 ns v cc = 5 v; c l =15pf - 26 - ns n rd (reset) to n qv cc = 4.5 v - 23 46 ns v cc = 5 v; c l =15pf - 23 - ns t thl , t tlh output transition time v cc = 4.5 v; see figure 9 - 7 15 ns t w pulse width v cc = 4.5 v n a low see figure 10 20 3 - ns nb high see figure 10 20 5 - ns n rd low see figure 11 20 7 - ns nq high and n qlow v cc = 5.0 v; see figure 10 and 11 [1] c ext = 100 nf; r ext = 10 k w - 450 - m s c ext = 0 pf; r ext = 5 k w -75-ns t rt retrigger time n a, nb c ext = 0 pf; r ext = 5 k w ; v cc = 5.0 v; see figure 10 [2] [3] - 110 - ns r ext external timing resistor v cc = 5.0 v; see figure 7 2 - 1000 k w c ext external timing capacitor v cc = 5.0 v; see figure 7 [3] no limits pf c pd power dissipation capacitance per monostable [4] [5] -56-pf t amb = - 40 c to +85 c t phl propagation delay c ext = 0 pf; r ext = 5 k w ; see figure 9 n rd, n a, nb to n qv cc = 4.5 v - - 64 ns n rd (reset) to nq v cc = 4.5 v - - 58 ns
74hc_hct123_4 ? koninklijke philips electronics n.v. 2006. all rights reserved. product data sheet rev. 04 16 june 2006 15 of 28 philips semiconductors 74hc123; 74hct123 dual retriggerable monostable multivibrator with reset [1] for other r ext and c ext combinations see figure 7 . if c ext > 10 nf, the next formula is valid. t w =k r ext c ext , where: t w = typical output pulse width in ns; r ext = external resistor in k w ; c ext = external capacitor in pf; k = constant = 0.45 for v cc = 5.0 v, see figure 8 . the inherent test jig and pin capacitance at pins 15 and 7 (nrext/cext) is approximately 7 pf. [2] the time to retrigger the monostable multivibrator depends on the values of r ext and c ext . the output pulse width will only be extended when the time between the active-going edges of the trigger input pulses meets the minimum retrigger time. if c ext >10 pf, the next formula (at v cc = 5.0 v) for the setup time of a retrigger pulse is valid: t rt = 30 + 0.19 r ext c ext 0.9 +13 r ext 1.05 , where: t rt = typical retrigger time in ns; c ext = external capacitor in pf; r ext = external resistor in k w . the inherent test jig and pin capacitance at pins 15 and 7 (nrext/cext) is 7 pf. [3] when the device is powered-up, initiate the device via a reset pulse, when c ext <50pf. t plh propagation delay c ext = 0 pf; r ext = 5 k w ; see figure 9 n rd, n a, nb to nq v cc = 4.5 v - - 64 ns n rd (reset) to n qv cc = 4.5 v - - 58 ns t thl , t tlh output transition time v cc = 4.5 v - - 19 ns t w pulse width v cc = 4.5 v n a low see figure 10 25--ns nb high see figure 10 25--ns n rd low see figure 11 25--ns t amb = - 40 c to +125 c t phl propagation delay c ext = 0 pf; r ext = 5 k w ; see figure 9 n rd, n a, nb to n qv cc = 4.5 v - - 77 ns n rd to nq (reset) v cc = 4.5 v - - 69 ns t plh propagation delay c ext = 0 pf; r ext = 5 k w ; see figure 9 n rd, n a, nb to nq v cc = 4.5 v - - 77 ns n rd to n q (reset) v cc = 4.5 v - - 69 ns t thl , t tlh output transition time v cc = 4.5 v - - 22 ns t w pulse width v cc = 4.5 v n a low see figure 10 30--ns nb high see figure 10 30--ns n rd low see figure 11 30--ns table 9. dynamic characteristics 74hct123 continued voltages are referenced to gnd (ground = 0 v); c l = 50 pf unless otherwise speci?ed. for test circuit see figure 12 . symbol parameter conditions min typ max unit
74hc_hct123_4 ? koninklijke philips electronics n.v. 2006. all rights reserved. product data sheet rev. 04 16 june 2006 16 of 28 philips semiconductors 74hc123; 74hct123 dual retriggerable monostable multivibrator with reset [4] c pd is used to determine the dynamic power dissipation (p d in m w). p d =c pd v cc 2 f i + ? (c l v cc 2 f o ) + 0.75 c ext v cc 2 f o +d 16 v cc where: f i = input frequency in mhz; f o = output frequency in mhz; d = duty factor in %; c l = output load capacitance in pf; v cc = supply voltage in v; c ext = timing capacitance in pf; ? (c l v cc 2 f o ) sum of outputs. [5] the condition is v i = gnd to v cc - 1.5 v. v cc = 5.0 v; t amb = 25 c. (1) r ext = 100 k w (2) r ext = 50 k w (3) r ext = 10 k w (4) r ext = 2 k w c x = 10 nf; r x = 10 k w to 100 k w fig 7. typical output pulse width as a function of the external capacitor value fig 8. 74hct123 typical k factor as function of v cc 001aaa611 10 3 10 2 10 5 10 4 10 6 t w (ns) 10 c ext (pf) 110 4 10 3 10 10 2 (2) (3) (4) (1) v cc (v) 08 6 24 001aaa612 0.4 0.2 0.6 0.8 'k' factor 0
74hc_hct123_4 ? koninklijke philips electronics n.v. 2006. all rights reserved. product data sheet rev. 04 16 june 2006 17 of 28 philips semiconductors 74hc123; 74hct123 dual retriggerable monostable multivibrator with reset 11. waveforms fig 9. propagation delays from inputs (n a, nb, n rd) to outputs (nq, n q) and output transition times 001aaa771 nb input t w t w t plh 50% 50% 50% t w t tlh t thl t plh t thl t w t phl t phl 50% t w t plh na input nrd input q output q output 50% t tlh t phl t phl t plh (reset) (reset) n rd = high fig 10. output pulse control using retrigger pulse mna521 t w t w t w t w t rt t w nb input na input nq output
74hc_hct123_4 ? koninklijke philips electronics n.v. 2006. all rights reserved. product data sheet rev. 04 16 june 2006 18 of 28 philips semiconductors 74hc123; 74hct123 dual retriggerable monostable multivibrator with reset n a = low fig 11. output pulse control using reset input n rd test data is given in t ab le 10 . de?nitions for test circuit: r t = termination resistance should be equal to output impedance z o of the pulse generator. c l = load capacitance including jig and probe capacitance. fig 12. load circuitry for switching times table 10. test data supply input load v cc v i t r , t f c l 2.0 v to 6.0 v v cc 6 ns 15 pf or 50 pf mna522 t w t w t w nb input nrd input nq output mna101 v cc v i v o r t c l pulse generator dut
74hc_hct123_4 ? koninklijke philips electronics n.v. 2006. all rights reserved. product data sheet rev. 04 16 june 2006 19 of 28 philips semiconductors 74hc123; 74hct123 dual retriggerable monostable multivibrator with reset 12. application information 12.1 timing component connections the basic output pulse width is essentially determined by the values of the external timing components r ext and c ext . 12.2 power-up considerations when the monostable is powered-up it may produce an output pulse, with a pulse width de?ned by the values of r ext and c ext . this output pulse can be eliminated using the circuit shown in figure 14 . (1) for minimum noise generation it is recommended to ground pins 6 (2cext) and 14 (1cext) externally to pin 8 (gnd). fig 13. timing component connections 001aaa854 c ext r ext a b v cc ncext nrd nrext/cext q q gnd 123 13 (5) 4 (12) 15 (7) 14 (6) 3 (11) 8 1 (9) 2 (10) (1) fig 14. power-up output pulse elimination circuit 001aaa613 v cc reset nrd c ext r ext a b v cc ncext gnd nrext/cext q q 123 13 (5) 4 (12) 15 (7) 14 (6) 8 1 (9) 2 (10) 3 (11)
74hc_hct123_4 ? koninklijke philips electronics n.v. 2006. all rights reserved. product data sheet rev. 04 16 june 2006 20 of 28 philips semiconductors 74hc123; 74hct123 dual retriggerable monostable multivibrator with reset 12.3 power-down considerations a large capacitor c ext may cause problems when powering-down the monostable due to the energy stored in this capacitor. when a system containing this device is powered-down or a rapid decrease of v cc to zero occurs, the monostable may sustain damage, due to the capacitor discharging through the input protection diodes. to avoid this possibility, use a damping diode (d ext ) preferably a germanium or schottky type diode able to withstand large current surges and connect as shown in figure 15 . fig 15. power-down protection circuit 001aaa614 d ext nrd c ext r ext a b v cc ncext nrext/cext q q 123 13 (5) 4 (12) 15 (7) 1 (9) 2 (10) 3 (11) gnd 14 (6) 8
74hc_hct123_4 ? koninklijke philips electronics n.v. 2006. all rights reserved. product data sheet rev. 04 16 june 2006 21 of 28 philips semiconductors 74hc123; 74hct123 dual retriggerable monostable multivibrator with reset 13. package outline fig 16. package outline sot38-1 (dip16) unit a max. 1 2 b 1 cee m h l references outline version european projection issue date iec jedec jeita mm inches dimensions (inch dimensions are derived from the original mm dimensions) sot38-1 99-12-27 03-02-13 a min. a max. b max. w m e e 1 1.40 1.14 0.055 0.045 0.53 0.38 0.32 0.23 21.8 21.4 0.86 0.84 6.48 6.20 0.26 0.24 3.9 3.4 0.15 0.13 0.254 2.54 7.62 0.3 8.25 7.80 0.32 0.31 9.5 8.3 0.37 0.33 2.2 0.087 4.7 0.51 3.7 0.15 0.021 0.015 0.013 0.009 0.01 0.1 0.02 0.19 050g09 mo-001 sc-503-16 m h c (e ) 1 m e a l seating plane a 1 w m b 1 e d a 2 z 16 1 9 8 b e pin 1 index 0 5 10 mm scale note 1. plastic or metal protrusions of 0.25 mm (0.01 inch) maximum per side are not included. (1) (1) d (1) z dip16: plastic dual in-line package; 16 leads (300 mil); long body sot38-1
74hc_hct123_4 ? koninklijke philips electronics n.v. 2006. all rights reserved. product data sheet rev. 04 16 june 2006 22 of 28 philips semiconductors 74hc123; 74hct123 dual retriggerable monostable multivibrator with reset fig 17. package outline sot109-1 (so16) x w m q a a 1 a 2 b p d h e l p q detail x e z e c l v m a (a ) 3 a 8 9 1 16 y pin 1 index unit a max. a 1 a 2 a 3 b p cd (1) e (1) (1) eh e ll p qz y w v q references outline version european projection issue date iec jedec jeita mm inches 1.75 0.25 0.10 1.45 1.25 0.25 0.49 0.36 0.25 0.19 10.0 9.8 4.0 3.8 1.27 6.2 5.8 0.7 0.6 0.7 0.3 8 0 o o 0.25 0.1 dimensions (inch dimensions are derived from the original mm dimensions) note 1. plastic or metal protrusions of 0.15 mm (0.006 inch) maximum per side are not included. 1.0 0.4 sot109-1 99-12-27 03-02-19 076e07 ms-012 0.069 0.010 0.004 0.057 0.049 0.01 0.019 0.014 0.0100 0.0075 0.39 0.38 0.16 0.15 0.05 1.05 0.041 0.244 0.228 0.028 0.020 0.028 0.012 0.01 0.25 0.01 0.004 0.039 0.016 0 2.5 5 mm scale so16: plastic small outline package; 16 leads; body width 3.9 mm sot109-1
74hc_hct123_4 ? koninklijke philips electronics n.v. 2006. all rights reserved. product data sheet rev. 04 16 june 2006 23 of 28 philips semiconductors 74hc123; 74hct123 dual retriggerable monostable multivibrator with reset fig 18. package outline sot338-1 (ssop16) unit a 1 a 2 a 3 b p cd (1) e (1) eh e ll p qz y w v q references outline version european projection issue date iec jedec jeita mm 0.21 0.05 1.80 1.65 0.25 0.38 0.25 0.20 0.09 6.4 6.0 5.4 5.2 0.65 1.25 7.9 7.6 1.03 0.63 0.9 0.7 1.00 0.55 8 0 o o 0.13 0.2 0.1 dimensions (mm are the original dimensions) note 1. plastic or metal protrusions of 0.25 mm maximum per side are not included. sot338-1 99-12-27 03-02-19 (1) w m b p d h e e z e c v m a x a y 1 8 16 9 q a a 1 a 2 l p q detail x l (a ) 3 mo-150 pin 1 index 0 2.5 5 mm scale ssop16: plastic shrink small outline package; 16 leads; body width 5.3 mm sot338-1 a max. 2
74hc_hct123_4 ? koninklijke philips electronics n.v. 2006. all rights reserved. product data sheet rev. 04 16 june 2006 24 of 28 philips semiconductors 74hc123; 74hct123 dual retriggerable monostable multivibrator with reset fig 19. package outline sot403-1 (tssop16) unit a 1 a 2 a 3 b p cd (1) e (2) (1) eh e ll p qz y w v q references outline version european projection issue date iec jedec jeita mm 0.15 0.05 0.95 0.80 0.30 0.19 0.2 0.1 5.1 4.9 4.5 4.3 0.65 6.6 6.2 0.4 0.3 0.40 0.06 8 0 o o 0.13 0.1 0.2 1 dimensions (mm are the original dimensions) notes 1. plastic or metal protrusions of 0.15 mm maximum per side are not included. 2. plastic interlead protrusions of 0.25 mm maximum per side are not included. 0.75 0.50 sot403-1 mo-153 99-12-27 03-02-18 w m b p d z e 0.25 18 16 9 q a a 1 a 2 l p q detail x l (a ) 3 h e e c v m a x a y 0 2.5 5 mm scale tssop16: plastic thin shrink small outline package; 16 leads; body width 4.4 mm sot403-1 a max. 1.1 pin 1 index
74hc_hct123_4 ? koninklijke philips electronics n.v. 2006. all rights reserved. product data sheet rev. 04 16 june 2006 25 of 28 philips semiconductors 74hc123; 74hct123 dual retriggerable monostable multivibrator with reset fig 20. package outline sot763-1 (dhvqfn16) terminal 1 index area 0.5 1 a 1 e h b unit y e 0.2 c references outline version european projection issue date iec jedec jeita mm 3.6 3.4 d h 2.15 1.85 y 1 2.6 2.4 1.15 0.85 e 1 2.5 0.30 0.18 0.05 0.00 0.05 0.1 dimensions (mm are the original dimensions) sot763-1 mo-241 - - - - - - 0.5 0.3 l 0.1 v 0.05 w 0 2.5 5 mm scale sot763-1 dhvqfn16: plastic dual in-line compatible thermal enhanced very thin quad flat package; no leads; 16 terminals; body 2.5 x 3.5 x 0.85 mm a (1) max. a a 1 c detail x y y 1 c e l e h d h e e 1 b 27 15 10 9 8 1 16 x d e c b a terminal 1 index area a c c b v m w m e (1) note 1. plastic or metal protrusions of 0.075 mm maximum per side are not included. d (1) 02-10-17 03-01-27
74hc_hct123_4 ? koninklijke philips electronics n.v. 2006. all rights reserved. product data sheet rev. 04 16 june 2006 26 of 28 philips semiconductors 74hc123; 74hct123 dual retriggerable monostable multivibrator with reset 14. abbreviations 15. revision history table 11. abbreviations acronym abbreviation cmos complementary metal oxide semiconductor dut device under test esd electrostatic discharge hbm human body model lsttl low-power schottky transistor-transistor logic mm machine model table 12. revision history document id release date data sheet status change notice supersedes 74hc_hct123_4 20060616 product data - 74hc_hct123_3 modi?cations: ? added: type number 74hc123bq (dhvqfn16 package) 74hc_hct123_3 (9397 750 13024) 20040511 product data - 74hc_hct123_2 74hc_hct123_2 19980708 product speci?cation - 74hc_hct123_1
74hc_hct123_4 ? koninklijke philips electronics n.v. 2006. all rights reserved. product data sheet rev. 04 16 june 2006 27 of 28 philips semiconductors 74hc123; 74hct123 dual retriggerable monostable multivibrator with reset 16. legal information 16.1 data sheet status [1] please consult the most recently issued document before initiating or completing a design. [2] the term short data sheet is explained in section de?nitions. [3] the product status of device(s) described in this document may have changed since this document was published and may differ in case of multiple dev ices. the latest product status information is available on the internet at url http://www .semiconductors .philips .com. 16.2 de?nitions draft the document is a draft version only. the content is still under internal review and subject to formal approval, which may result in modi?cations or additions. philips semiconductors does not give any representations or warranties as to the accuracy or completeness of information included herein and shall have no liability for the consequences of use of such information. short data sheet a short data sheet is an extract from a full data sheet with the same product type number(s) and title. a short data sheet is intended for quick reference only and should not be relied upon to contain detailed and full information. for detailed and full information see the relevant full data sheet, which is available on request via the local philips semiconductors sales of?ce. in case of any inconsistency or con?ict with the short data sheet, the full data sheet shall prevail. 16.3 disclaimers general information in this document is believed to be accurate and reliable. however, philips semiconductors does not give any representations or warranties, expressed or implied, as to the accuracy or completeness of such information and shall have no liability for the consequences of use of such information. right to make changes philips semiconductors reserves the right to make changes to information published in this document, including without limitation speci?cations and product descriptions, at any time and without notice. this document supersedes and replaces all information supplied prior to the publication hereof. suitability for use philips semiconductors products are not designed, authorized or warranted to be suitable for use in medical, military, aircraft, space or life support equipment, nor in applications where failure or malfunction of a philips semiconductors product can reasonably be expected to result in personal injury, death or severe property or environmental damage. philips semiconductors accepts no liability for inclusion and/or use of philips semiconductors products in such equipment or applications and therefore such inclusion and/or use is for the customers own risk. applications applications that are described herein for any of these products are for illustrative purposes only. philips semiconductors makes no representation or warranty that such applications will be suitable for the speci?ed use without further testing or modi?cation. limiting values stress above one or more limiting values (as de?ned in the absolute maximum ratings system of iec 60134) may cause permanent damage to the device. limiting values are stress ratings only and operation of the device at these or any other conditions above those given in the characteristics sections of this document is not implied. exposure to limiting values for extended periods may affect device reliability. terms and conditions of sale philips semiconductors products are sold subject to the general terms and conditions of commercial sale, as published at http://www .semiconductors .philips .com/pro? le/ter ms , including those pertaining to warranty, intellectual property rights infringement and limitation of liability, unless explicitly otherwise agreed to in writing by philips semiconductors. in case of any inconsistency or con?ict between information in this document and such terms and conditions, the latter will prevail. no offer to sell or license nothing in this document may be interpreted or construed as an offer to sell products that is open for acceptance or the grant, conveyance or implication of any license under any copyrights, patents or other industrial or intellectual property rights. 16.4 trademarks notice: all referenced brands, product names, service names and trademarks are the property of their respective owners. 17. contact information for additional information, please visit: http://www.semiconductors.philips.com for sales of?ce addresses, send an email to: sales.addresses@www.semiconductors.philips.com document status [1] [2] product status [3] de?nition objective [short] data sheet development this document contains data from the objective speci?cation for product development. preliminary [short] data sheet quali?cation this document contains data from the preliminary speci?cation. product [short] data sheet production this document contains the product speci?cation.
philips semiconductors 74hc123; 74hct123 dual retriggerable monostable multivibrator with reset ? koninklijke philips electronics n.v. 2006. all rights reserved. for more information, please visit: http://www.semiconductors.philips.com. for sales office addresses, email to: sales.addresses@www.semiconductors.philips.com. date of release: 16 june 2006 document identifier: 74hc_hct123_4 please be aware that important notices concerning this document and the product(s) described herein, have been included in section legal information. 18. contents 1 general description . . . . . . . . . . . . . . . . . . . . . . 1 2 features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 3 ordering information . . . . . . . . . . . . . . . . . . . . . 2 4 functional diagram . . . . . . . . . . . . . . . . . . . . . . 3 5 pinning information . . . . . . . . . . . . . . . . . . . . . . 5 5.1 pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 5.2 pin description . . . . . . . . . . . . . . . . . . . . . . . . . 5 6 functional description . . . . . . . . . . . . . . . . . . . 6 7 limiting values. . . . . . . . . . . . . . . . . . . . . . . . . . 7 8 recommended operating conditions. . . . . . . . 7 9 static characteristics. . . . . . . . . . . . . . . . . . . . . 8 10 dynamic characteristics . . . . . . . . . . . . . . . . . 11 11 waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 12 application information. . . . . . . . . . . . . . . . . . 19 12.1 timing component connections . . . . . . . . . . . 19 12.2 power-up considerations . . . . . . . . . . . . . . . . 19 12.3 power-down considerations . . . . . . . . . . . . . . 20 13 package outline . . . . . . . . . . . . . . . . . . . . . . . . 21 14 abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . 26 15 revision history . . . . . . . . . . . . . . . . . . . . . . . . 26 16 legal information. . . . . . . . . . . . . . . . . . . . . . . 27 16.1 data sheet status . . . . . . . . . . . . . . . . . . . . . . 27 16.2 de?nitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 16.3 disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 16.4 trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 17 contact information. . . . . . . . . . . . . . . . . . . . . 27 18 contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

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