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1. general description the 74hc244; 74HCT244 is a high-speed si-gate cmos device and is pin compatible with low-power schottky ttl (lsttl). the 74hc244; 74HCT244 has octal non-inverting buffer/line drivers with 3-state outputs. the 3-state outputs are controlled by the output enable inputs 1 oe and 2 oe. a high on n oe causes the outputs to assume a high-impedance off-state. the 74hc244; 74HCT244 is identical to the 74hc240; 74hct240 but has non-inverting outputs. 2. features n octal bus interface n non-inverting 3-state outputs n complies with jedec standard no. 7a n esd protection: u hbm eia/jesd22-a114-c exceeds 2000 v u mm eia/jesd22-a115-a exceeds 200 v n multiple package options n speci?ed from - 40 cto+85 c and from - 40 c to +125 c 3. quick reference data [1] c pd is used to determine the dynamic power dissipation (p d in m w): p d =c pd v cc 2 f i n+ ? (c l v cc 2 f o ) where: 74hc244; 74HCT244 octal buffer/line driver; 3-state rev. 03 22 december 2005 product data sheet table 1: quick reference data gnd = 0 v; t amb =25 c; t r =t f = 6 ns symbol parameter conditions min typ max unit 74hc244 t phl , t plh propagation delay nan to nyn v cc =5v; c l =15pf - 9 - ns c i input capacitance - 3.5 - pf c pd power dissipation capacitance per buffer; v i = gnd to v cc [1] -35-pf 74HCT244 t phl , t plh propagation delay nan to nyn v cc =5v; c l =15pf - 11 - ns c i input capacitance - 3.5 - pf c pd power dissipation capacitance per buffer; v i = gnd to (v cc - 1.5 v) [1] -35-pf
74hc_hct244_3 ? koninklijke philips electronics n.v. 2005. all rights reserved. product data sheet rev. 03 22 december 2005 2 of 22 philips semiconductors 74hc244; 74HCT244 octal buffer/line driver; 3-state f i = input frequency in mhz; f o = output frequency in mhz; c l = output load capacitance in pf; v cc = supply voltage in v; n = number of inputs switching; ? (c l v cc 2 f o ) = sum of outputs. 4. ordering information table 2: ordering information type number package temperature range name description version 74hc244 74hc244n - 40 c to +125 c dip20 plastic dual in-line package; 20 leads (300 mil) sot146-1 74hc244d - 40 c to +125 c so20 plastic small outline package; 20 leads; body width 7.5 mm sot163-1 74hc244db - 40 c to +125 c ssop20 plastic shrink small outline package; 20 leads; body width 5.3 mm sot339-1 74hc244pw - 40 c to +125 c tssop20 plastic thin shrink small outline package; 20 leads; body width 4.4 mm sot360-1 74hc244bq - 40 c to +125 c dhvqfn20 plastic dual in-line compatible thermal enhanced very thin quad ?at package; no leads; 20 terminals; body 2.5 4.5 0.85 mm sot764-1 74HCT244 74HCT244n - 40 c to +125 c dip20 plastic dual in-line package; 20 leads (300 mil) sot146-1 74HCT244d - 40 c to +125 c so20 plastic small outline package; 20 leads; body width 7.5 mm sot163-1 74HCT244db - 40 c to +125 c ssop20 plastic shrink small outline package; 20 leads; body width 5.3 mm sot339-1 74HCT244pw - 40 c to +125 c tssop20 plastic thin shrink small outline package; 20 leads; body width 4.4 mm sot360-1 74HCT244bq - 40 c to +125 c dhvqfn20 plastic dual in-line compatible thermal enhanced very thin quad ?at package; no leads; 20 terminals; body 2.5 4.5 0.85 mm sot764-1
74hc_hct244_3 ? koninklijke philips electronics n.v. 2005. all rights reserved. product data sheet rev. 03 22 december 2005 3 of 22 philips semiconductors 74hc244; 74HCT244 octal buffer/line driver; 3-state 5. functional diagram fig 1. functional diagram mna875 1a3 1a2 1a1 1a0 2 4 6 8 1 1y0 1y1 18 16 14 12 1y2 1y3 1oe 2a3 2a2 2a1 2a0 17 15 13 11 19 2y0 2y1 3 5 7 9 2y2 2y3 2oe fig 2. logic symbol fig 3. iec logic symbol mna874 8 6 4 2 1a0 1a1 1a2 1a3 1oe 18 16 1y0 1y1 1y2 1y3 14 12 1 11 13 15 17 2a0 2a1 2a2 2a3 2oe 3 5 2y0 2y1 2y2 2y3 7 9 19 12 14 2 4 6 8 18 16 1 en mna873 3 5 11 13 15 17 9 7 19 en
74hc_hct244_3 ? koninklijke philips electronics n.v. 2005. all rights reserved. product data sheet rev. 03 22 december 2005 4 of 22 philips semiconductors 74hc244; 74HCT244 octal buffer/line driver; 3-state 6. pinning information 6.1 pinning 6.2 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 4. pin con?guration dip20, so20, ssop20 and tssop20 fig 5. pin con?guration dhvqfn20 74hc244 74HCT244 1oe v cc 1a0 2oe 2y0 1y0 1a1 2a0 2y1 1y1 1a2 2a1 2y2 1y2 1a3 2a2 2y3 1y3 gnd 2a3 001aae011 1 2 3 4 5 6 7 8 9 10 12 11 14 13 16 15 18 17 20 19 001aae012 74hc244 74HCT244 transparent top view 1y3 1a3 2y3 2a2 2y2 1y2 1a2 2a1 2y1 1y1 1a1 2a0 2y0 1y0 1a0 2oe gnd 2a3 1oe v cc 9 12 8 13 7 14 6 15 5 16 4 17 3 18 2 19 10 11 1 20 terminal 1 index area gnd (1) table 3: pin description symbol pin description 1 oe 1 1 output enable input (active low) 1a0 2 1 data input 0 2y0 3 2 bus output 0 1a1 4 1 data input 1 2y1 5 2 bus output 1 1a2 6 1 data input 2 2y2 7 2 bus output 2 1a3 8 1 data input 3 2y3 9 2 bus output 3 gnd 10 ground (0 v) 2a3 11 2 data input 3 1y3 12 1 bus output 3 2a2 13 2 data input 2 1y2 14 1 bus output 2
74hc_hct244_3 ? koninklijke philips electronics n.v. 2005. all rights reserved. product data sheet rev. 03 22 december 2005 5 of 22 philips semiconductors 74hc244; 74HCT244 octal buffer/line driver; 3-state 7. functional description 7.1 function table [1] h = high voltage level; l = low voltage level; x = dont care; z = high-impedance off-state. 8. limiting values 2a1 15 2 data input 1 1y1 16 1 bus output 1 2a0 17 2 data input 0 1y0 18 1 bus output 0 2 oe 19 2 output enable input (active low) v cc 20 supply voltage table 3: pin description continued symbol pin description table 4: function table [1] control input output n oe nan nyn lll hh hxz table 5: 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 v o = - 0.5 v to (v cc + 0.5 v) - 35 ma i cc quiescent supply current - 70 ma i gnd ground current - - 70 ma t stg storage temperature - 65 +150 c p tot total power dissipation dip20 package [1] - 750 mw so20 package [2] - 500 mw ssop20 package [3] - 500 mw tssop20 package [3] - 500 mw dhvqfn20 package [4] - 500 mw
74hc_hct244_3 ? koninklijke philips electronics n.v. 2005. all rights reserved. product data sheet rev. 03 22 december 2005 6 of 22 philips semiconductors 74hc244; 74HCT244 octal buffer/line driver; 3-state [1] for dip20 package: p tot derates linearly with 12 mw/k above 70 c. [2] for so20 package: p tot derates linearly with 8 mw/k above 70 c. [3] for ssop20 and tssop20 packages: p tot derates linearly with 5.5 mw/k above 60 c [4] for dhvqfn20 packages: p tot derates linearly with 4.5 mw/k above 60 c. 9. recommended operating conditions 10. static characteristics table 6: recommended operating conditions symbol parameter conditions min typ max unit 74hc244 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 amb ambient temperature - 40 25 +125 c t r , t f input rise and fall time v cc = 2.0 v - - 1000 ns v cc = 4.5 v - 6.0 500 ns v cc = 6.0 v - - 400 ns 74HCT244 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 amb ambient temperature - 40 25 +125 c t r , t f input rise and fall time v cc = 4.5 v - 6.0 500 ns table 7: static characteristics 74hc244 at recommended operating conditions; voltages are referenced to gnd (ground = 0v). 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 = - 6.0 ma; v cc = 4.5 v 3.98 4.32 - v i o = - 7.8 ma; v cc = 6 v 5.48 5.81 - v
74hc_hct244_3 ? koninklijke philips electronics n.v. 2005. all rights reserved. product data sheet rev. 03 22 december 2005 7 of 22 philips semiconductors 74hc244; 74HCT244 octal buffer/line driver; 3-state 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 = 6.0 ma; v cc = 4.5 v - 0.15 0.26 v i o = 7.8 ma; v cc = 6 v - 0.16 0.26 v i li input leakage current v i =v cc or gnd; v cc = 6 v - - 0.1 m a i oz off-state output current v i = v ih or v il ; v o =v cc or gnd - - 0.5 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 = - 6.0 ma; v cc = 4.5 v 3.84 - - v i o = - 7.8 ma; v cc = 6 v 5.34 - - 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 = 6.0 ma; v cc = 4.5 v - - 0.33 v i o = 7.8 ma; v cc = 6 v - - 0.33 v i li input leakage current v i =v cc or gnd; v cc = 6 v - - 1.0 m a i oz off-state output current v i = v ih or v il ; v o =v cc or gnd - - 5.0 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 table 7: static characteristics 74hc244 continued at recommended operating conditions; voltages are referenced to gnd (ground = 0v). symbol parameter conditions min typ max unit
74hc_hct244_3 ? koninklijke philips electronics n.v. 2005. all rights reserved. product data sheet rev. 03 22 december 2005 8 of 22 philips semiconductors 74hc244; 74HCT244 octal buffer/line driver; 3-state 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 = - 6.0 ma; v cc = 4.5 v 3.7 - - v i o = - 7.8 ma; v cc = 6 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 = 6.0 ma; v cc = 4.5 v - - 0.4 v i o = 7.8 ma; v cc = 6 v - - 0.4 v i li input leakage current v i =v cc or gnd; v cc = 6 v - - 1.0 m a i oz off-state output current v i = v ih or v il ; v o =v cc or gnd - - 10.0 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 7: static characteristics 74hc244 continued at recommended operating conditions; voltages are referenced to gnd (ground = 0v). symbol parameter conditions min typ max unit table 8: static characteristics 74HCT244 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 = - 6.0 ma 3.98 4.32 - 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 0.1 v i o = 6.0 ma - 0.16 0.26 v i li input leakage current v i =v cc or gnd; v cc = 5.5 v - - 0.1 m a i oz off-state output current per input pin; v i = v ih or v il ; v o =v cc or gnd; other pins at gnd or v cc ; i o = 0 a; v cc = 5.5 v -- 0.5 m a i cc quiescent supply current v i =v cc or gnd; i o =0a; v cc = 5.5 v - - 8.0 m a
74hc_hct244_3 ? koninklijke philips electronics n.v. 2005. all rights reserved. product data sheet rev. 03 22 december 2005 9 of 22 philips semiconductors 74hc244; 74HCT244 octal buffer/line driver; 3-state d i cc additional quiescent supply current per input pin; v i =v cc - 2.1 v; other inputs at v cc or gnd; i o =0a; v cc = 4.5 v to 5.5 v 70 252 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 = - 6.0 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 = 6.0 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 oz off-state output current per input pin; v i = v ih or v il ; v o =v cc or gnd; other pins at gnd or v cc ; i o = 0 a; v cc = 5.5 v 5.0 m a i cc quiescent supply current v i =v cc or gnd; i o =0a; 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; other inputs at v cc or gnd; i o =0a; v cc = 4.5 v to 5.5 v - - 315 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 = - 6.0 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 = 6.0 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 oz off-state output current per input pin; v i = v ih or v il ; v o =v cc or gnd; other pins at gnd or v cc ; i o = 0 a; v cc = 5.5 v -- 10.0 m a i cc quiescent supply current v i =v cc or gnd; i o =0a; v cc = 5.5 v - - 160 m a d i cc additional quiescent supply current per input pin; v i =v cc - 2.1 v; other inputs at v cc or gnd; i o =0a; v cc = 4.5 v to 5.5 v - - 343 m a table 8: static characteristics 74HCT244 continued at recommended operating conditions; voltages are referenced to gnd (ground = 0 v). symbol parameter conditions min typ max unit
74hc_hct244_3 ? koninklijke philips electronics n.v. 2005. all rights reserved. product data sheet rev. 03 22 december 2005 10 of 22 philips semiconductors 74hc244; 74HCT244 octal buffer/line driver; 3-state 11. dynamic characteristics table 9: dynamic characteristics 74hc244 gnd = 0 v; t r =t f = 6 ns; c l = 50 pf unless otherwise speci?ed; for test circuit see figure 8 . symbol parameter conditions min typ max unit t amb = 25 c t phl , t plh propagation delay nan to nyn see figure 6 v cc = 2.0 v - 30 110 ns v cc = 4.5 v - 11 22 ns v cc = 5 v; c l =15pf - 9 - ns v cc = 6.0 v - 9 19 ns t pzh , t pzl 3-state output enable time n oe to nyn see figure 7 v cc = 2.0 v - 36 150 ns v cc = 4.5 v - 13 30 ns v cc = 6.0 v - 10 26 ns t phz , t plz 3-state output disable time n oe to nyn see figure 7 v cc = 2.0 v - 39 150 ns v cc = 4.5 v - 14 30 ns v cc = 6.0 v - 11 26 ns t thl , t tlh output transition time see figure 6 v cc = 2.0 v - 14 60 ns v cc = 4.5 v - 5 12 ns v cc = 6.0 v - 4 10 ns c pd power dissipation capacitance v i = gnd to v cc [1] -35-pf t amb = - 40 c to +85 c t phl , t plh propagation delay nan to nyn see figure 6 v cc = 2.0 v - - 145 ns v cc = 4.5 v - - 28 ns v cc = 6.0 v - - 24 ns t pzh , t pzl 3-state output enable time n oe to nyn see figure 7 v cc = 2.0 v - - 190 ns v cc = 4.5 v - - 38 ns v cc = 6.0 v - - 33 ns t phz , t plz 3-state output disable time n oe to nyn see figure 7 v cc = 2.0 v - - 190 ns v cc = 4.5 v - - 38 ns v cc = 6.0 v - - 33 ns t thl , t tlh output transition time see figure 6 v cc = 2.0 v - - 75 ns v cc = 4.5 v - - 15 ns v cc = 6.0 v - - 13 ns
74hc_hct244_3 ? koninklijke philips electronics n.v. 2005. all rights reserved. product data sheet rev. 03 22 december 2005 11 of 22 philips semiconductors 74hc244; 74HCT244 octal buffer/line driver; 3-state [1] c pd is used to determine the dynamic power dissipation (p d in m w): p d =c pd v cc 2 f i n+ ? (c l v cc 2 f o ) where: f i = input frequency in mhz; f o = output frequency in mhz; c l = output load capacitance in pf; v cc = supply voltage in v; n = number of inputs switching; ? (c l v cc 2 f o ) = sum of outputs. t amb = - 40 c to +125 c t phl , t plh propagation delay nan to nyn see figure 6 v cc = 2.0 v - - 165 ns v cc = 4.5 v - - 33 ns v cc = 6.0 v - - 28 ns t pzh , t pzl 3-state output enable time n oe to nyn see figure 7 v cc = 2.0 v - - 225 ns v cc = 4.5 v - - 45 ns v cc = 6.0 v - - 38 ns t phz , t plz 3-state output disable time n oe to nyn see figure 7 v cc = 2.0 v - - 225 ns v cc = 4.5 v - - 45 ns v cc = 6.0 v - - 38 ns t thl , t tlh output transition time see figure 6 v cc = 2.0 v - - 90 ns v cc = 4.5 v - - 18 ns v cc = 6.0 v - - 15 ns table 9: dynamic characteristics 74hc244 continued gnd = 0 v; t r =t f = 6 ns; c l = 50 pf unless otherwise speci?ed; for test circuit see figure 8 . symbol parameter conditions min typ max unit table 10: dynamic characteristics type 74HCT244 gnd = 0 v; t r =t f = 6 ns; c l = 50 pf unless otherwise speci?ed; for test circuit see figure 8 . symbol parameter conditions min typ max unit t amb = 25 c t phl , t plh propagation delay nan to nyn see figure 6 v cc = 4.5 v - 13 22 ns v cc = 5 v; c l =15pf - 11 - ns t pzh , t pzl 3-state output enable time n oe to nyn v cc = 4.5 v; see figure 7 - 1530ns t phz , t plz 3-state output disable time n oe to nyn v cc = 4.5 v; see figure 7 - 1525ns t thl , t tlh output transition time v cc = 4.5 v; see figure 6 - 5 12 ns c pd power dissipation capacitance v i = gnd to (v cc - 1.5 v) [1] -35-pf
74hc_hct244_3 ? koninklijke philips electronics n.v. 2005. all rights reserved. product data sheet rev. 03 22 december 2005 12 of 22 philips semiconductors 74hc244; 74HCT244 octal buffer/line driver; 3-state [1] c pd is used to determine the dynamic power dissipation (p d in m w): p d =c pd v cc 2 f i n+ ? (c l v cc 2 f o ) where: f i = input frequency in mhz; f o = output frequency in mhz; c l = output load capacitance in pf; v cc = supply voltage in v; n = number of inputs switching; ? (c l v cc 2 f o ) = sum of outputs. 12. waveforms t amb = - 40 c to +85 c t phl , t plh propagation delay nan to nyn v cc = 4.5 v; see figure 6 --28ns t pzh , t pzl 3-state output enable time n oe to nyn v cc = 4.5 v; see figure 7 --38ns t phz , t plz 3-state output disable time n oe to nyn v cc = 4.5 v; see figure 7 --31ns t thl , t tlh output transition time v cc = 4.5 v; see figure 6 --15ns t amb = - 40 c to +125 c t phl , t plh propagation delay nan to nyn v cc = 4.5 v; see figure 6 --33ns t pzh , t pzl 3-state output enable time n oe to nyn v cc = 4.5 v; see figure 7 --45ns t phz , t plz 3-state output disable time n oe to nyn v cc = 4.5 v; see figure 7 --38ns t thl , t tlh output transition time v cc = 4.5 v; see figure 6 --18ns table 10: dynamic characteristics type 74HCT244 continued gnd = 0 v; t r =t f = 6 ns; c l = 50 pf unless otherwise speci?ed; for test circuit see figure 8 . symbol parameter conditions min typ max unit measurement points are given in t ab le 11 . v ol and v oh are typical voltage output drop that occur with the output load. fig 6. propagation delay input (1an, 2an) to output (1yn, 2yn) and transition time output (nyn) 001aae013 t plh t phl v m v m v m v m nyn output nan input v i gnd v oh v ol t tlh t thl 90 % 10 %
74hc_hct244_3 ? koninklijke philips electronics n.v. 2005. all rights reserved. product data sheet rev. 03 22 december 2005 13 of 22 philips semiconductors 74hc244; 74HCT244 octal buffer/line driver; 3-state measurement points are given in t ab le 11 . v ol and v oh are typical voltage output drop that occur with the output load. fig 7. 3-state enable and disable times table 11: measurement points type input output v m v m 74hc244 0.5v cc 0.5v cc 74HCT244 1.3 v 1.3 v 001aae014 t plz t phz outputs disabled outputs enabled v y v x outputs enabled nyn output low-to-off off-to-low nyn output high-to-off off-to-high noe input v i v ol v oh v cc v m gnd gnd t pzl t pzh v m v m
74hc_hct244_3 ? koninklijke philips electronics n.v. 2005. all rights reserved. product data sheet rev. 03 22 december 2005 14 of 22 philips semiconductors 74hc244; 74HCT244 octal buffer/line driver; 3-state test data is given in t ab le 12 . de?nitions 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 r l = load resistor s1 = test selection switch fig 8. load circuitry for switching times table 12: test data type input load s1 position v i t r , t f c l r l t phl , t plh t pzh , t phz t pzl , t plz 74hc244 v cc 6 ns 15 pf, 50 pf 1 k w open gnd v cc 74HCT244 3 v 6 ns 15 pf, 50 pf 1 k w open gnd v cc v m v m t w t w 10 % 90 % 0 v v i v i negative pulse positive pulse 0 v v m v m 90 % 10 % t f t r t r t f 001aad983 dut v cc v cc v i v o r t r l s1 c l open pulse generator
74hc_hct244_3 ? koninklijke philips electronics n.v. 2005. all rights reserved. product data sheet rev. 03 22 december 2005 15 of 22 philips semiconductors 74hc244; 74HCT244 octal buffer/line driver; 3-state 13. package outline fig 9. package outline sot146-1 (dip20) unit a max. 1 2 b 1 cd e e 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) sot146-1 99-12-27 03-02-13 a min. a max. b z max. w m e e 1 1.73 1.30 0.53 0.38 0.36 0.23 26.92 26.54 6.40 6.22 3.60 3.05 0.254 2.54 7.62 8.25 7.80 10.0 8.3 2 4.2 0.51 3.2 0.068 0.051 0.021 0.015 0.014 0.009 1.060 1.045 0.25 0.24 0.14 0.12 0.01 0.1 0.3 0.32 0.31 0.39 0.33 0.078 0.17 0.02 0.13 sc-603 ms-001 m h c (e ) 1 m e a l seating plane a 1 w m b 1 e d a 2 z 20 1 11 10 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) (1) dip20: plastic dual in-line package; 20 leads (300 mil) sot146-1
74hc_hct244_3 ? koninklijke philips electronics n.v. 2005. all rights reserved. product data sheet rev. 03 22 december 2005 16 of 22 philips semiconductors 74hc244; 74HCT244 octal buffer/line driver; 3-state fig 10. package outline sot163-1 (so20) unit a max. a 1 a 2 a 3 b p cd (1) e (1) (1) eh e ll p q z y w v q references outline version european projection issue date iec jedec jeita mm inches 2.65 0.3 0.1 2.45 2.25 0.49 0.36 0.32 0.23 13.0 12.6 7.6 7.4 1.27 10.65 10.00 1.1 1.0 0.9 0.4 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. 1.1 0.4 sot163-1 10 20 w m b p detail x z e 11 1 d y 0.25 075e04 ms-013 pin 1 index 0.1 0.012 0.004 0.096 0.089 0.019 0.014 0.013 0.009 0.51 0.49 0.30 0.29 0.05 1.4 0.055 0.419 0.394 0.043 0.039 0.035 0.016 0.01 0.25 0.01 0.004 0.043 0.016 0.01 0 5 10 mm scale x q a a 1 a 2 h e l p q e c l v m a (a ) 3 a so20: plastic small outline package; 20 leads; body width 7.5 mm sot163-1 99-12-27 03-02-19
74hc_hct244_3 ? koninklijke philips electronics n.v. 2005. all rights reserved. product data sheet rev. 03 22 december 2005 17 of 22 philips semiconductors 74hc244; 74HCT244 octal buffer/line driver; 3-state fig 11. package outline sot339-1 (ssop20) unit a 1 a 2 a 3 b p cd (1) e (1) eh e ll p q (1) z y w v q references outline version european projection issue date iec jedec jeita mm 0.21 0.05 1.80 1.65 0.38 0.25 0.20 0.09 7.4 7.0 5.4 5.2 0.65 7.9 7.6 0.9 0.7 0.9 0.5 8 0 o o 0.13 1.25 0.2 0.1 dimensions (mm are the original dimensions) note 1. plastic or metal protrusions of 0.2 mm maximum per side are not included. 1.03 0.63 sot339-1 mo-150 99-12-27 03-02-19 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 110 20 11 y 0.25 pin 1 index 0 2.5 5 mm scale ssop20: plastic shrink small outline package; 20 leads; body width 5.3 mm sot339-1 a max. 2
74hc_hct244_3 ? koninklijke philips electronics n.v. 2005. all rights reserved. product data sheet rev. 03 22 december 2005 18 of 22 philips semiconductors 74hc244; 74HCT244 octal buffer/line driver; 3-state fig 12. package outline sot360-1 (tssop20) 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 6.6 6.4 4.5 4.3 0.65 6.6 6.2 0.4 0.3 0.5 0.2 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 sot360-1 mo-153 99-12-27 03-02-19 w m b p d z e 0.25 110 20 11 pin 1 index 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 tssop20: plastic thin shrink small outline package; 20 leads; body width 4.4 mm sot360-1 a max. 1.1
74hc_hct244_3 ? koninklijke philips electronics n.v. 2005. all rights reserved. product data sheet rev. 03 22 december 2005 19 of 22 philips semiconductors 74hc244; 74HCT244 octal buffer/line driver; 3-state fig 13. package outline sot764-1 (dhvqfn20) 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 4.6 4.4 d h 3.15 2.85 y 1 2.6 2.4 1.15 0.85 e 1 3.5 0.30 0.18 0.05 0.00 0.05 0.1 dimensions (mm are the original dimensions) sot764-1 mo-241 - - - - - - 0.5 0.3 l 0.1 v 0.05 w 0 2.5 5 mm scale sot764-1 dhvqfn20: plastic dual in-line compatible thermal enhanced very thin quad flat package; no leads; 20 terminals; body 2.5 x 4.5 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 29 19 12 11 10 1 20 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_hct244_3 ? koninklijke philips electronics n.v. 2005. all rights reserved. product data sheet rev. 03 22 december 2005 20 of 22 philips semiconductors 74hc244; 74HCT244 octal buffer/line driver; 3-state 14. abbreviations 15. revision history table 13: abbreviations acronym description 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 14: revision history document id release date data sheet status change notice doc. number supersedes 74hc_hct244_3 20051222 product data sheet - - 74hc_hct244_cnv _2 modi?cations: ? the format of this data sheet has been redesigned to comply with the new presentation and information standard of philips semiconductors. ? section 4 order ing inf or mation , section 6 pinning inf or mation and section 13 p ac kage outline : added dhvqfn package information ? section 10 static char acter istics : added from the family speci?cation 74hc_hct244_cnv_2 19901201 product speci?cation - - -
philips semiconductors 74hc244; 74HCT244 octal buffer/line driver; 3-state 74hc_hct244_3 ? koninklijke philips electronics n.v. 2005. all rights reserved. product data sheet rev. 03 22 december 2005 21 of 22 16. data sheet status [1] please consult the most recently issued data sheet before initiating or completing a design. [2] the product status of the device(s) described in this data sheet may have changed since this data sheet was published. the l atest information is available on the internet at url http://www.semiconductors.philips.com. [3] for data sheets describing multiple type numbers, the highest-level product status determines the data sheet status. 17. de?nitions short-form speci?cation the data in a short-form speci?cation is extracted from a full data sheet with the same type number and title. for detailed information see the relevant data sheet or data handbook. limiting values de?nition limiting values given are in accordance with the absolute maximum rating system (iec 60134). stress above one or more of the limiting values may cause permanent damage to the device. these are stress ratings only and operation of the device at these or at any other conditions above those given in the characteristics sections of the speci?cation is not implied. exposure to limiting values for extended periods may affect device reliability. application information 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. 18. disclaimers life support these products are not designed for use in life support appliances, devices, or systems where malfunction of these products can reasonably be expected to result in personal injury. philips semiconductors customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify philips semiconductors for any damages resulting from such application. right to make changes philips semiconductors reserves the right to make changes in the products - including circuits, standard cells, and/or software - described or contained herein in order to improve design and/or performance. when the product is in full production (status production), relevant changes will be communicated via a customer product/process change noti?cation (cpcn). philips semiconductors assumes no responsibility or liability for the use of any of these products, conveys no license or title under any patent, copyright, or mask work right to these products, and makes no representations or warranties that these products are free from patent, copyright, or mask work right infringement, unless otherwise speci?ed. 19. trademarks notice all referenced brands, product names, service names and trademarks are the property of their respective owners. 20. 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 level data sheet status [1] product status [2] [3] de?nition i objective data development this data sheet contains data from the objective speci?cation for product development. philips semiconductors reserves the right to change the speci?cation in any manner without notice. ii preliminary data quali?cation this data sheet contains data from the preliminary speci?cation. supplementary data will be published at a later date. philips semiconductors reserves the right to change the speci?cation without notice, in order to improve the design and supply the best possible product. iii product data production this data sheet contains data from the product speci?cation. philips semiconductors reserves the right to make changes at any time in order to improve the design, manufacturing and supply. relevant changes will be communicated via a customer product/process change noti?cation (cpcn).
? koninklijke philips electronics n.v. 2005 all rights are reserved. reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. the information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. no liability will be accepted by the publisher for any consequence of its use. publication thereof does not convey nor imply any license under patent- or other industrial or intellectual property rights. date of release: 22 december 2005 document number: 74hc_hct244_3 published in the netherlands philips semiconductors 74hc244; 74HCT244 octal buffer/line driver; 3-state 21. contents 1 general description . . . . . . . . . . . . . . . . . . . . . . 1 2 features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 3 quick reference data . . . . . . . . . . . . . . . . . . . . . 1 4 ordering information . . . . . . . . . . . . . . . . . . . . . 2 5 functional diagram . . . . . . . . . . . . . . . . . . . . . . 3 6 pinning information . . . . . . . . . . . . . . . . . . . . . . 4 6.1 pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 6.2 pin description . . . . . . . . . . . . . . . . . . . . . . . . . 4 7 functional description . . . . . . . . . . . . . . . . . . . 5 7.1 function table . . . . . . . . . . . . . . . . . . . . . . . . . . 5 8 limiting values. . . . . . . . . . . . . . . . . . . . . . . . . . 5 9 recommended operating conditions. . . . . . . . 6 10 static characteristics. . . . . . . . . . . . . . . . . . . . . 6 11 dynamic characteristics . . . . . . . . . . . . . . . . . 10 12 waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 13 package outline . . . . . . . . . . . . . . . . . . . . . . . . 15 14 abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . 20 15 revision history . . . . . . . . . . . . . . . . . . . . . . . . 20 16 data sheet status . . . . . . . . . . . . . . . . . . . . . . . 21 17 de?nitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 18 disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 19 trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 20 contact information . . . . . . . . . . . . . . . . . . . . 21

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