HD74HC85RPEL. 4-bit Magnitude Comparator. Description. Features. REJ03D (Previous ADE ) Rev.2.00 Oct 06, 2005

Transcription

1 4-bit Magnitud Comparator RJ (Prvious ) Rv.2.00 Ot 06, 2005 sription Th H74HC85 is dsignd for high spd omparison of two four bit words. This iruit has ight omparison input, 4 for ah word; thr asad inputs ( < B, > B, = B); and thr dision outputs ( < B, > B, = B). Th rsult of a omparison is indiatd by a high lvl on on of th dision outputs. Thus it may b dtrmind whthr on word is gratr than, lss than, or qual to th othr word. By onnting th outputs of th last signifiant stag to th asad inputs of th nxt stag, words of gratr than four bits an b ompard. In addition th last signifiant stag must hav a high lvl applid to th = B input, and a low lvl to th < B, and > B inputs. Faturs High Spd Opration: t pd (ata Word Input to Output) = 20 ns typ (C = 50 pf) High Output Currnt: Fanout of 0 STT oads Wid Oprating Voltag: V CC = 2 to 6 V ow Input Currnt: µ max ow Quisnt Supply Currnt: I CC (stati) = 4 µ max (Ta = 25 C) Ordring Information Part Nam H74HC85P H74HC85FP H74HC85RP Pakag Typ IP-6 pin SOP-6 pin (JIT) SOP-6 pin (JC) Pakag Cod (Prvious Cod) PRP006-B (P-6FV) PRSP006H-B (FP-6V) PRSP006G- (FP-6NV) Not: Plas onsult th sals offi for th abov pakag availability. Pakag bbrviation P FP RP Taping bbrviation (Quantity) (2,000 ps/rl) (2,500 ps/rl) Rv.2.00, Ot 06, 2005 pag of 7

2 Funtion Tabl ata Word Inputs Casading Inputs Outputs 3, B 3 2, B 2, B 0, B 0 > Bin = Bin < Bin > Bout = Bout < Bout 3 > B 3 X X X X X X H 3 < B 3 X X X X X X H 3 = B 3 2 > B 2 X X X X X H 3 = B 3 2 < B 2 X X X X X H 3 = B 3 2 = B 2 > B X X X X H 3 = B 3 2 = B 2 < B X X X X H 3 = B 3 2 = B 2 = B 0 > B 0 X X X H 3 = B 3 2 = B 2 = B 0 < B 0 X X X H 3 = B 3 2 = B 2 = B 0 = B 0 H H 3 = B 3 2 = B 2 = B 0 = B 0 H H 3 = B 3 2 = B 2 = B 0 = B 0 H H 3 = B 3 2 = B 2 = B 0 = B 0 H H 3 = B 3 2 = B 2 = B 0 = B 0 X H X H H : High lvl : ow lvl X : Irrlvant Pin rrangmnt B3 ata Input <B 2 B3 <B V CC 3 =B 3 =B In B2 4 B2 >B 4 >B >B 5 >B 2 =B 6 =B out B B <B 7 <B B GN 8 9 B0 (Top viw) Rv.2.00, Ot 06, 2005 pag 2 of 7

3 ogi iagram B3 3 >Bout B2 2 B <Bout B0 0 <Bin =Bin =Bout >Bin bsolut Maximum Ratings Itm Symbol Ratings Unit Supply voltag rang V CC 0.5 to 7.0 V Input / Output voltag Vin, Vout 0.5 to V CC +0.5 V Input / Output diod urrnt I IK, I OK ±20 m Output urrnt I O ±25 m V CC, GN urrnt I CC or I GN ±50 m Powr dissipation P T 500 mw Storag tmpratur Tstg 65 to +50 C Not: Th absolut maximum ratings ar valus, whih must not individually b xdd, and furthrmor, no two of whih may b ralizd at th sam tim. Rommndd Oprating Conditions Itm Symbol Ratings Unit Conditions Supply voltag V CC 2 to 6 V Input / Output voltag V IN, V OUT 0 to V CC V Oprating tmpratur Ta 40 to 85 C 0 to 000 V CC = 2.0 V Input ris / fall tim * t r, t f 0 to 500 ns V CC = 4.5 V 0 to 400 V CC = 6.0 V Not:. This itm guarants maximum limit whn on input swiths. Wavform: Rfr to tst iruit of swithing haratristis. Rv.2.00, Ot 06, 2005 pag 3 of 7

4 ltrial Charatristis Input voltag Ta = 25 C Ta = 40 to+85 C Itm Symbol V CC (V) Min Typ Max Min Max Unit Tst Conditions Output voltag V IH V I V OH V O V V I OH = 20 µ I OH = 4 m V Vin = V IH or V I I OH = 5.2 m I O = 20 µ I O = 4 m V Vin = V IH or V I Input urrnt Iin 6.0 ±0. ±.0 µ Vin = V CC or GN Quisnt supply urrnt I O = 5.2 m I CC µ Vin = V CC or GN, Iout = 0 µ Swithing Charatristis (C = 50 pf, Input t r = t f = 6 ns) Ta = 25 C Ta = 40 to +85 C Itm Symbol V CC (V) Min Typ Max Min Max Unit Tst Conditions Propagation dlay tim Output fall tim t PH, t PH t PH, t PH t PH, t PH t PH, t PH t TH Input apaitan Cin pf ns C 0 to Σ ns or B to Σ ns C 0 to C 4 ns or B to C 4 ns Rv.2.00, Ot 06, 2005 pag 4 of 7

5 Tst Ciruit V CC V CC Output Puls gnrator out = 50 Ω Input S Funtion Tabl 3 B3 2 B2 B 0 B0 <B =B >B >B =B <B C = 50 pf Output C = 50 pf Output C = 50 pf Not: C inluds th prob and jig apaitan. Wavforms t r t f Input 50 % 50 % V CC 0 V t PH t PH Sam-phas output 50 % 50 % V OH V O t PH t TH t PH t TH Invrs-phas output 50 % 50 % V OH V O t TH t TH Nots:. Input wavform: PRR MHz, o = 50 Ω, t r 6 ns, t f 6 ns 2. Th output ar masurd on at a tim with on transition pr masurmnt. Rv.2.00, Ot 06, 2005 pag 5 of 7

6 H74HC85 Pakag imnsions JIT Pakag Cod P-IP6-6.3x RNSS Cod PRP006-B Prvious Cod P-6FV MSS[Typ.].05g b 3 Rfrn Symbol imnsion in Millimtrs Min Nom Max b ( Ni/Pd/u plating ) JIT Pakag Cod P-SOP6-3.95x RNSS Cod PRSP006G- Prvious Cod FP-6NV MSS[Typ.] 0.5g 6 * 9 F H NOT). IMNSIONS"* (Nom)"N"*2" O NOT INCU MO FSH. 2. IMNSION"*3"OS NOT INCU TRIM OFFST. Indx mark *2 *3 x M 8 Trminal ross stion ( Ni/Pd/u plating ) Rfrn Symbol 2 imnsion in Millimtrs Min Nom Max b y tail F H x y Rv.2.00, Ot 06, 2005 pag 6 of 7

7 JIT Pakag Cod P-SOP6-5.5x RNSS Cod PRSP006H-B Prvious Cod FP-6V MSS[Typ.] 0.24g * *2 6 9 F H Indx mark 8 *3 x M Rfrn Symbol 2 imnsion in Millimtrs Min Nom Max b H y NOT). IMNSIONS"* (Nom)"N"*2" O NOT INCU MO FSH. 2. IMNSION"*3"OS NOT INCU TRIM OFFST. Trminal ross stion ( Ni/Pd/u plating ) x tail F y Rv.2.00, Ot 06, 2005 pag 7 of 7

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