74LS182

SN54LS182 MOTOROLA | Alldatasheet

Document overview

• Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
• PDF pages: 4

Technical content

(SY MOTOROLA DESCRIPTION — The SN54LS/74LS182 is a high-speed Carry SN74 182 Lookahead Generator. It is generally used with the SN54LS/74LS181 Bi eneatmanteLagig Unit provge high speed lookahead over word Jengths of more than four bits. The carry lookahead generator is fully compatible with al! members of the Motorola ‘TTL Family. CARRY LOOKAHEAD * PROVIDES CARRY LOOKAHEAD ACROSS A GENERATOR GROUP OF FOUR ALUs * MULTI-LEVEL LOOKAHEAD FOR HIGH-SPEED ARITHMETIC LOW POWER SCHOTTKY OPERATION OVER LONG WORD LENGTHS INPUT CLAMP DIODES LIMIT HIGH-SPEED TERMINATION EFFECTS Loatc sruson LOADING (Note a) PIN NAMES. HIGH. LOW aaa. uswes Ge Carry Input os5uL.| 025UL. ivevecue' G,, G Carry Generate (Active LOW) Inputs 35UL. 1.75 UL. loco Pre 2 or is 40 & Carry Generate (Active LOW) Input 40u.L.| 20 UL ta-fee oP G,_ Carry Generate (Active LOW) Input 20ut.| 1.0 UL. ebe> PS Carry Propagate (Active LOW) Input 1.0 ULL. 05 UL. Gree, Crepe Cres Carry Outputs (Note b) 10 UL. |5 (25) UL. G Carry Generate (Active LOW) Output 10 UL. |5 (2.5) ULL, Veo = Fin 16 _ (Note b) GND = Pin P Carry Propagate (Active LOW) Output WOU.L. 6 (2.5) UL. (Note b) ‘CONNECTION DIAGRAM Dip (TOP View) sores Toei omanala Ge De Cpdory Hy ee ai Gene «Ge ofls alelo oa lo @| |@ ol le in Deere a Mitetianee=—— “eps HOSS ES Poh SEege awl ei itil J Sutfix — Case 620-08 (Ceramic) OD DUU VOU QUDY VQ | [Msutx—crvect6-05 ase V, U U) UY nore @) e} fo} @ fo} | pinouts (Connection Diagram) 2s a MOTOROLA SCHOTTKY TTL DEVICES 5-170

FUNCTIONAL DESCRIPTION — The SNS4LS/74LS182, carry lookahead generator accepts up to four pairs of active LOW Carry Propagate (Po. Py, P2, P3)and Carry Generate (Go, G1, Gz, Gg) signals and an active HIGH Carry Input (Cp) and provides anticipated active HIGH carries (Cr+x, Cn-+y. Cn+z) across four groups of binary adders. The SN54LS/741S182 also has active LOW Carry Propagate (P) and Carry Generate (G) outputs which may be used for further levels of lookahead. The logic equations provided at the outputs are: Ch+x = Go + PoC Cnty = G1 + P1Go = PyPOCh Ghz = Ga + P2Gy = P2P2G0 + P2P1PoCn G =G3 + P3G2 + PaP2Gq + P3P2P1Go P -=P3P2P1P9 Also, the SN54LS/74LS182 can be used with binary ALUs in an active LOW or active HIGH. input operand mode. The connections to and from the ALU to the carry lookahead generator are identical in both cases. TRUTH TABLE x oH ow L Low x ‘ x Lx 4 Hox H xx XH A v x oH How x L ee es L x xX x Lc x # Sr ee 4 a ee er 4 x x x x xX WF v x xX K H HH oH x L LH xX HK oH x t x KX xX x x Lo x 4 ee ee 4 X bo K X co x ob " ee ee ee ee 4 x xx xx HH cy ) x x xX H oH HO x 4 x KOH HH xXx ow x 4

4 HOOK Hx oH x #

: x x x Kx x Lx L x XK GC KX Kok t x re ee a ae L L x ou x te x L " Fa x x cy) x 4 x x 4 x x 4 x x x x x 4 x t t L t “ f= HIGH Voltage Love! C2 LOW Vonage Level X= immateral eSSSSSSSsSSSSSSSSsssssssSssee MOTOROLA SCHOTTKY TTL DEVICES 5-171

(GUARANTEED OPERATING RANGES SYMBOL PARAMETER 0 a Vec ‘Supply Voltage 54 45 50 v 74 as 50 TA Operating Ambient Temperature Range 54 25 125 °c 74 25 70 . ‘ou Output Current — High 54,74 0.4 mA tou Output Current — Low 84 {40 mA 74 80 DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified) SYMBOL [enna ag EN amc] Om | TEST CONDITIONS Guaranteed Input HIGH Voltage for votowvage pt | er | Guaranteed Input LOW Vatiage for Vik Input Clamp Diode Vortege |_| -065| -15| Vv | Vec=MIN IN=—18mA Vou oupunicH vonage |= | 28 | | | vy Vog = MIN, Vin = Vint er Viper Teh Tate [sa7a | | 025 | 0a | Vec = MIN. Vin = Vin ve put LOW Vat v on ups tow votase | Tt | —§ oe oe | iog= 8 mao” vi per Tat Table fn j 20 Go. G2 _ } 140 G3, Po. Pa 80 aA VIN= 2.7V Pa 60 Voc = MAX P3 40

4 G1 _ 160 _ a ee

" Cy _ 01 Go. G2 _ O7 5 G3. Po. Pr | 04 Vin=70V Pa 03 | mA Vcc = MAX 63 02 Gi 08 fn 04 Go. G2 _ 28 Boo | t6 vin=04V Me Pp | -12] mA Voc = MAX z “08 ico -3.2 ’ 1 _ m Voc = MAX 'os OutowShor-Crurcuren | -20 | | =100] ma veo MAK Power Suppiy Corvent } lec Total, Output HIGH 12.) mA Vee = MAX | Total, output Low ee ee a MOTOROLA SCHOTTKY TTL DEVICES 5-172

AC CHARACTERISTICS: Ta = 25°C, Voc = 5.0V. CL = 15 pF SYMBOL [racer a | om | TEST CONDITIONS 'PLH 12 Fo = Py = a = Gnd, Go = Gy = G. 'PLH (Po. Py. or B to B= Gnd (if not under test), {PHL Cntx Cnty Cntz) fn = Go= Gi = Gp = 4.5V, Fig. 2 {PL (Go, Gy. or G2 to 21 &=4.5 VIIf not under test), tPHL Cntx: Cnty. Coz) 22 Cn = Po=Py = Fo = Gnd, Fig. 2 'PLH . . Px = Grd (if not under test), bird 1, P2 or Py 10 6) =) =~ Gye Gov, Fed tPLH G a G6 = 45 Vif not under test), a oe TPL - Se. Py = Gna (if not under test), Bi [enmenes | Te T De Ts AC WAVEFORMS pur (DTT ttt tran ca nna 30v Coy Py or By 13V av H=0.1.2003) | ! ow bere H 1 1 (TTT I Fiat Fo Py. Py ORGy, Gy. Gp ov Fa? MOTOROLA SCHOTTKY TTL DEVICES. 5-173