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1/11 september 2001 n high speed : t pd = 14ns (typ.) at v cc = 6v n low power dissipation: i cc =4 m a(max.) at t a =25c n high noise immunity: v nih = v nil = 28 % v cc (min.) n symmetrical output impedance: |i oh | = i ol = 4ma (min) n balanced propagation delays: t plh @ t phl n wide operating voltage range: v cc (opr) = 2v to 6v n pin and function compatible with 74 series 182 description the m74hc182 is an high speed cmos function look ahead carry generator fabricated with silicon gate c 2 mos technology. this circuit is capable of anticipating a carry across four binary adders or group of adders. it is cascadable to perform full look ahead across n-bit adders. carry, generate-carry, and propagate-carry functions are provided as shown in the pin connection table. when used in conjunction with the hc181 arithmetic logic unit, this generator provides high speed carry look-ahead capability for any word length. each hc182 generates the look ahead (anticipated carry) across a group of four alus and, in addition, other carry look-ahead circuits may be employed to anticipate carry across sections of four look-ahead packages up to n-bits. the method of cascading circuits to perform multilevel look-ahead is illustrated under typical application data. carry input and output of the alus are in their true form, and the carry propagate (p) and carry generate(g) are in negated form; therefore the carry functions (inputs, outputs, generate and propagate) of the look-ahead generators are implemented in the compatible forms for direct connection to the alu. reinterpretation of carry functions as explained on the hc181 data sheet are also applicable to and compatible with the look-ahead generator. all inputs are equipped with protection circuits against static discharge and transient excess voltage. m74hc182 function look ahead carry generator pin connection and iec logic symbols order codes package tube t & r dip m74hc182b1r sop M74HC182M1R m74hc182rm13tr tssop m74hc182ttr tssop dip sop
m74hc182 2/11 input and output equivalent circuit pin description truth tables for g output for p output for cn+x output pin no symbol name and function 3, 1, 14, 5 g0 to g3 carry generate inputs (active low) 4, 2, 15, 6 p0 to p3 carry propagate inputs (active low) 7p carry propagate output (active low) 9 cn+z function output 10 g carry generate output (active low) 11 cn+y function output 12 cn+x function output 13 cn 8 gnd ground (0v) 16 vcc positive supply voltage inputs output g3 g2 g1 g0 p3 p2 p1 g lxxxxxxl xlxxlxxl xxlxllxl xxxlllll all other combinations h inputs output p3 p2 p1 p0 p lllll all other combinations h inputs output g0 p0 cn cn+x lxxh xlhh all other combinations l
m74hc182 3/11 for cn+y output for cn+z output x : dont care cn+x = g0+p0cn cn+y = g1+p1g0+p1p0cn cn+z = g2+p2g1+p2p1g0+p2p1p0cn g = g3+g3+p3g2+p3p2g1+p3p2p1g0 p = p3p2p1p0 or cn+x = y0+(x0+cn) cn+y = y1+[x1+y0(x0+cn)] cn+z = y2+{x2+y1[x1+y0(x0+cn)]} g = y3+(x3+y2)(x3+x2+y1)(x3+x2+x1+y0) p = x3+x2+x1+x0 logic diagram inputs output g1 g0 p1 p0 cn cn+y lxxxxh xllxxh xxl lhh all other combinations l inputs output g2 g1 go p2 p1 p0 cn cn+z lxxxxxxh xlxlxxxh xxlllxxh xxxl l lhh all other combinations l
m74hc182 4/11 absolute maximum ratings absolute maximum ratings are those values beyond which damage to the device may occur. functional operation under these conditi ons is not implied (*) 500mw at 65 c; derate to 300mw by 10mw/ c from 65 c to 85 c recommended operating conditions symbol parameter value unit v cc supply voltage -0.5 to +7 v v i dc input voltage -0.5 to v cc + 0.5 v v o dc output voltage -0.5 to v cc + 0.5 v i ik dc input diode current 20 ma i ok dc output diode current 20 ma i o dc output current 25 ma i cc or i gnd dc v cc or ground current 50 ma p d power dissipation 500(*) mw t stg storage temperature -65 to +150 c t l lead temperature (10 sec) 300 c symbol parameter value unit v cc supply voltage 2 to 6 v v i input voltage 0 to v cc v v o output voltage 0 to v cc v t op operating temperature -55 to 125 c t r , t f input rise and fall time v cc = 2.0v 0 to 1000 ns v cc = 4.5v 0 to 500 ns v cc = 6.0v 0 to 400 ns
m74hc182 5/11 dc specifications ac electrical characteristics (c l = 50 pf, input t r = t f = 6ns) symbol parameter test condition value unit v cc (v) t a = 25c -40 to 85c -55 to 125c min. typ. max. min. max. min. max. v ih high level input voltage 2.0 1.5 1.5 1.5 v 4.5 3.15 3.15 3.15 6.0 4.2 4.2 4.2 v il low level input voltage 2.0 0.5 0.5 0.5 v 4.5 1.35 1.35 1.35 6.0 1.8 1.8 1.8 v oh high level output voltage 2.0 i o =-20 m a 1.9 2.0 1.9 1.9 v 4.5 i o =-20 m a 4.4 4.5 4.4 4.4 6.0 i o =-20 m a 5.9 6.0 5.9 5.9 4.5 i o =-4.0 ma 4.18 4.31 4.13 4.10 6.0 i o =-5.2 ma 5.68 5.8 5.63 5.60 v ol low level output voltage 2.0 i o =20 m a 0.0 0.1 0.1 0.1 v 4.5 i o =20 m a 0.0 0.1 0.1 0.1 6.0 i o =20 m a 0.0 0.1 0.1 0.1 4.5 i o =4.0 ma 0.17 0.26 0.33 0.40 6.0 i o =5.2 ma 0.18 0.26 0.33 0.40 i i input leakage current 6.0 v i = v cc or gnd 0.1 1 1 m a i cc quiescent supply current 6.0 v i = v cc or gnd 44080 m a symbol parameter test condition value unit v cc (v) t a = 25c -40 to 85c -55 to 125c min. typ. max. min. max. min. max. t tlh t thl output transition time 2.0 30 75 95 110 ns 4.5 8151922 6.0 7131619 t plh t phl propagation delay time (gn , pn - cn+xyz) 2.0 62 135 170 205 ns 4.5 17 27 34 41 6.0 13 23 29 35 t plh t phl propagation delay time (gn , pn - g) 2.0 72 150 190 225 ns 4.5 19 30 38 45 6.0 14 26 32 38 t plh t phl propagation delay time (pn - p ) 2.0 62 135 170 205 ns 4.5 17 27 34 41 6.0 13 23 29 35 t plh t phl propagation delay time (cn - cn+xyz) 2.0 62 135 170 205 ns 4.5 17 27 34 41 6.0 13 23 29 35
m74hc182 6/11 capacitive characteristics 1) c pd is defined as the value of the ics internal equivalent capacitance which is calculated from the operating current consumption without load. (refer to test circuit). average operating current can be obtained by the following equation. i cc(opr) = c pd x v cc x f in + i cc /2(per flip-flop) typical application symbol parameter test condition value unit v cc (v) t a = 25c -40 to 85c -55 to 125c min. typ. max. min. max. min. max. c in input capacitance 5.0 5101010pf c pd power dissipation capacitance (note 1) 5.0 61 pf 64-bit, full carry look-ahead in three levels
m74hc182 7/11 test circuit c l = 50pf or equivalent (includes jig and probe capacitance) r t = z out of pulse generator (typically 50 w ) waveform : propagation delay time (f=1mhz; 50% duty cycle)
m74hc182 8/11 dim. mm. inch min. typ max. min. typ. max. a1 0.51 0.020 b 0.77 1.65 0.030 0.065 b 0.5 0.020 b1 0.25 0.010 d 20 0.787 e 8.5 0.335 e 2.54 0.100 e3 17.78 0.700 f 7.1 0.280 i 5.1 0.201 l 3.3 0.130 z 1.27 0.050 plastic dip-16 (0.25) mechanical data p001c
m74hc182 9/11 dim. mm. inch min. typ max. min. typ. max. a 1.75 0.068 a1 0.1 0.2 0.003 0.007 a2 1.65 0.064 b 0.35 0.46 0.013 0.018 b1 0.19 0.25 0.007 0.010 c 0.5 0.019 c1 45 (typ.) d 9.8 10 0.385 0.393 e 5.8 6.2 0.228 0.244 e 1.27 0.050 e3 8.89 0.350 f 3.8 4.0 0.149 0.157 g 4.6 5.3 0.181 0.208 l 0.5 1.27 0.019 0.050 m 0.62 0.024 s8 (max.) so-16 mechanical data po13h
m74hc182 10/11 dim. mm. inch min. typ max. min. typ. max. a 1.2 0.047 a1 0.05 0.15 0.002 0.004 0.006 a2 0.8 1 1.05 0.031 0.039 0.041 b 0.19 0.30 0.007 0.012 c 0.09 0.20 0.004 0.0089 d 4.9 5 5.1 0.193 0.197 0.201 e 6.2 6.4 6.6 0.244 0.252 0.260 e1 4.3 4.4 4.48 0.169 0.173 0.176 e 0.65 bsc 0.0256 bsc k0 80 8 l 0.45 0.60 0.75 0.018 0.024 0.030 tssop16 mechanical data c e b a2 a e1 d 1 pin 1 identification a1 l k e 0080338d
m74hc182 information furnished is believed to be accurate and reliable. however, stmicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result f rom its use. no license is granted by implication or otherwise under any patent or patent rights of stmicroelectronics. specificati ons mentioned in this publication are subject to change without notice. this publication supersedes and replaces all information previously supplied. stmicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of stmicroelectronics. ? the st logo is a registered trademark of stmicroelectronics ? 2001 stmicroelectronics - printed in italy - all rights reserved stmicroelectronics group of companies australia - brazil - china - finland - france - germany - hong kong - india - italy - japan - malaysia - malta - morocco singapore - spain - sweden - switzerland - united kingdom ? http://www.st.com 11/11

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