View 74HCT182_76098.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

INTEGRATED CIRCUITS
DATA SHEET
For a complete data sheet, please also download:
* The IC06 74HC/HCT/HCU/HCMOS Logic Family Specifications * The IC06 74HC/HCT/HCU/HCMOS Logic Package Information * The IC06 74HC/HCT/HCU/HCMOS Logic Package Outlines
74HC/HCT182 Look-ahead carry generator
Product specification File under Integrated Circuits, IC06 December 1990
Philips Semiconductors
Product specification
Look-ahead carry generator
FEATURES * Provides carry look-ahead across a group of four ALU's * Multi-level look-ahead for high-speed arithmetic operation over long word length * Output capability: standard * ICC category: MSI GENERAL DESCRIPTION The 74HC/HCT182 are high-speed Si-gate CMOS devices and are pin compatible with low power Schottky TTL (LSTTL). They are specified in compliance with JEDEC standard no. 7A. The 74HC/HCT182 carry look-ahead generators accept up to four pairs of active LOW carry propagate (P0, P1, P2, P3) and carry generate (G0, G1, G2, G3) signals and an active HIGH carry input (Cn). The devices provide QUICK REFERENCE DATA GND = 0 V; Tamb = 25 C; tr = tf = 6 ns
74HC/HCT182
anticipated active HIGH carries (Cn+x, Cn+y, Cn+z) across four groups of binary adders. The "182" also has active LOW carry propagate (P) and carry generate (G) outputs which may be used for further levels of look-ahead. The logic equations provided at the outputs are: Cn+x = G0 + P0Cn Cn+y = G1 + P1G0 + P1P0Cn Cn+z = G2 + P2G1 + P2P1G0 + P2P1P0Cn G = G3 + P3 G2 + P3 P2 G1 + P3 P2 P1 GO P = P3 P2 P1 P0 The "182" can also be used with binary ALU's in an active LOW or active HIGH input operand mode. The connections to and from the ALU to the carry look-ahead generator are identical in both cases.
TYPICAL SYMBOL tPHL/ tPLH PARAMETER propagation delay Pn to P Cn to any output Pn or Gn to any output input capacitance power dissipation capacitance per package notes 1 and 2 CONDITIONS HC CL = 15 pF; VCC = 5 V 11 17 14 3.5 50 14 21 17 3.5 50 ns ns ns pF pF HCT UNIT
CI CPD Notes
1. CPD is used to determine the dynamic power dissipation (PD in W): PD = CPD x VCC2 x fi + (CL x VCC2 x fo) where: fi = input frequency in MHz fo = output frequency in MHz (CL x VCC2 x fo) = sum of outputs CL = output load capacitance in pF VCC = supply voltage in V 2. For HC the condition is VI = GND to VCC For HCT the condition is VI = GND to VCC - 1.5 V ORDERING INFORMATION See "74HC/HCT/HCU/HCMOS Logic Package Information".
December 1990
2
Philips Semiconductors
Product specification
Look-ahead carry generator
PIN DESCRIPTION PIN NO. 3, 1, 14, 5 4, 2, 15, 6 7 8 9 10 11 12 13 16 SYMBOL G0 to G3 P0 to P3 P GND Cn+z G Cn+y Cn+x Cn VCC NAME AND FUNCTION carry generate inputs (active LOW) carry propagate inputs (active LOW) carry propagate output (active LOW) ground (0 V) function output carry generate output (active LOW) function output function output carry input (active HIGH) positive supply voltage
74HC/HCT182
Fig.1 Pin configuration.
Fig.2 Logic symbol.
Fig.3 IEC logic symbol.
December 1990
3
Philips Semiconductors
Product specification
Look-ahead carry generator
74HC/HCT182
Fig.4 Functional diagram.
Fig.5 Logic diagram.
December 1990
4
Philips Semiconductors
Product specification
Look-ahead carry generator
FUNCTION TABLE INPUTS Cn X L X H X X L X X H X X X L X X X H G0 H H L X X H H X L X X X H H X X L X X X X H X X X L H X X X L Notes 1. H = HIGH voltage level L = LOW voltage level X = don't care H X X L X H X X X L X X H X X X X L H H H L X X X H H H X L X X X X H H X X L X H X X X L L X H X X X X L L X X H X X X X L X H X X L H H H H L X X X X H H H X L X X H X X X X L L L X H X X X X L L X X H X L H H H H L X X X H X X X X L L L X X X H L P0 G1 P1 G2 P2 G3 P3 Cn+x L L H H L L L H H H L L L L
74HC/HCT182
OUTPUTS Cn+y Cn+z G P
H H H H H H H H L L L L H H H H L
December 1990
5
Philips Semiconductors
Product specification
Look-ahead carry generator
DC CHARACTERISTICS FOR 74HC For the DC characteristics see "74HC/HCT/HCU/HCMOS Logic Family Specifications". Output capability: standard ICC category: MSI AC CHARACTERISTICS FOR 74HC GND = 0 V; tr = tf = 6 ns; CL = 50 pF Tamb (C) 74HC SYMBOL PARAMETER min. tPHL/ tPLH propagation delay Pn to P propagation delay Cn to any output propagation delay Pn to G propagation delay Pn to Cn+n propagation delay Gn to Cn+n propagation delay Gn to G output transition time +25 typ. 30 14 11 55 20 16 47 17 14 47 17 14 44 16 13 41 15 12 19 7 6 -40 to +85 max. min. 120 24 20 170 34 29 145 29 25 145 29 25 135 27 23 135 27 23 75 15 13 max. 150 30 26 215 43 37 180 36 31 180 36 31 170 34 29 170 34 29 95 19 16 -40 to +125 min. max. 180 36 31 255 51 43 220 44 38 220 44 38 205 41 35 205 41 35 110 22 19 ns UNIT
74HC/HCT182
TEST CONDITIONS VCC WAVEFORMS (V) 2.0 4.5 6.0 2.0 4.5 6.0 2.0 4.5 6.0 2.0 4.5 6.0 2.0 4.5 6.0 2.0 4.5 6.0 2.0 4.5 6.0 Fig.6
tPHL/ tPLH
ns
Fig.6
tPHL/ tPLH
ns
Fig.6
tPHL/ tPLH
ns
Fig.6
tPHL/ tPLH
ns
Fig.6
tPHL/ tPLH
ns
Fig.6
tTHL/ tTLH
ns
Fig.6
December 1990
6
Philips Semiconductors
Product specification
Look-ahead carry generator
DC CHARACTERISTICS FOR 74HCT For the DC characteristics see "74HC/HCT/HCU/HCMOS Logic Family Specifications". Output capability: standard ICC category: MSI Note to HCT types
74HC/HCT182
The value of additional quiescent supply current (ICC) for a unit load of 1 is given in the family specifications. To determine ICC per input, multiply this value by the unit load coefficient shown in the table below.
INPUT G0, G1, P0, P1, P2 G3 G2, P3, Cn
UNIT LOAD COEFFICIENT 1.50 0.30 1.25
AC CHARACTERISTICS FOR 74HCT GND = 0 V; tr = tf = 6 ns; CL = 50 pF Tamb (C) 74HCT SYMBOL PARAMETER min. tPHL/ tPLH tPHL/ tPLH tPHL/ tPLH tPHL/ tPLH tPHL/ tPLH tTHL/ tTLH propagation delay Pn to P propagation delay Cn to any output propagation delay Pn to G propagation delay Pn to Cn+n propagation delay Gn to Cn+n, Gn to G output transition time +25 typ. 17 26 20 20 18 7 -40 to +85 max. min. 28 43 33 33 32 15 max. 35 54 41 41 40 19 -40 to +125 min. max. 42 65 50 50 48 22 ns ns ns ns ns ns 4.5 4.5 4.5 4.5 4.5 4.5 Fig.6 Fig.6 Fig.6 Fig.6 Fig.6 Fig.6 UNIT VCC (V) WAVEFORMS TEST CONDITIONS
December 1990
7
Philips Semiconductors
Product specification
Look-ahead carry generator
AC WAVEFORMS
74HC/HCT182
(1) HC : VM = 50%; VI = GND to VCC. HCT: VM = 1.3 V; VI = GND to 3 V.
Fig.6 Waveforms showing the input (Pn, Cn, Gn) to any output propagation delays and the output transition times.
APPLICATION INFORMATION
A and B inputs and F outputs of "181" are not shown.
Fig.7 16-bit ALU two-level look-ahead.
A and B inputs and F outputs of "181" are not shown.
Fig.8 32-bit ALU two-level look-ahead over 16-bit groups.
December 1990
8
Philips Semiconductors
Product specification
Look-ahead carry generator
74HC/HCT182
A and B inputs and F outputs of "181" are not shown.
Fig.9 Combined two-level look-ahead and ripple-carry ALU.
A and B inputs and F outputs of "181" are not shown.
Fig.10 64-bit ALU full-carry three-level look-ahead.
PACKAGE OUTLINES See "74HC/HCT/HCU/HCMOS Logic Package Outlines".
December 1990
9

▲Up To Search▲

Price & Availability of 74HCT182

	To Download 74HCT182 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .