MOTOROLA CMOS LOGIC DATA

1

MC14582B

Look-Ahead Carry Block

The MC14582B is a CMOS look–ahead carry generator capable of

anticipating a carry across four binary adders or groups of adders. The

device is cascadable to perform full look–ahead across n–bit adders. Carry,

generate–carry, and propagate–carry functions are provided as enumerated

in the pin designation table shown below.

• Expandable to any Number of Bits

• All Buffered Outputs

• Low Power Dissipation

• Diode Protection on All Inputs

• Supply Voltage Range = 3.0 Vdc to 18 Vdc

• Capable of Driving Two Low–power TTL Loads or One Low–Power

Schottky TTL Load over the Rated Temperature Range

Symbol

Parameter

Value

Unit

VDD

DC Supply Voltage

– 0.5 to + 18.0

V

Vin, Vout Input or Output Voltage (DC or Transient)

– 0.5 to VDD + 0.5

V

Iin, Iout

Input or Output Current (DC or Transient),

per Pin

± 10

mA

PD

Power Dissipation, per Package†

500

mW

Tstg

Storage Temperature

– 65 to + 150

_C

TL

Lead Temperature (8–Second Soldering)

260

_C

* Maximum Ratings are those values beyond which damage to the device may occur.

†Temperature Derating:

Plastic “P and D/DW” Packages: – 7.0 mW/

_C From 65_C To 125_C

Ceramic “L” Packages: – 12 mW/

_C From 100_C To 125_C

LOGIC EQUATIONS

Cn+x = G0 + (P0  Cn)

Cn+y = G1 + (P1  G0) + (P1  P0  Cn)

Cn+z = G2 + (P2  G1) + (P2  P1 G0) + (P2  P1  P0  Cn)

G = G3 + (P3

 G2) + (P3  P2  G1) + (P1  P2  P3  G0)

P = P3

 P2  P1  P0

PIN DESIGNATIONS

Designation

Pin No’s

Function

G0, G1, G2, G3

3, 1, 14, 5

Active–Low

Carry–Generate Inputs

P0, P1, P2, P3

4, 2, 15, 6

Active–Low

Carry–Propagate Inputs

Cn

13

Carry Input

Cn+x, Cn+y

Cn+z

12, 11, 9

Carry Outputs

G

10

Active–Low Group

Carry–Generate Output

P

7

Active–Low Group

Carry–Propagate Output

MOTOROLA

SEMICONDUCTOR TECHNICAL DATA

REV 3

1/94

MC14582B

L SUFFIX

CERAMIC

CASE 620

ORDERING INFORMATION

MC14XXXBCP

Plastic

MC14XXXBCL

Ceramic

MC14XXXBD

SOIC

TA = – 55° to 125°C for all packages.

P SUFFIX

PLASTIC

CASE 648

D SUFFIX

SOIC

CASE 751B

PIN ASSIGNMENT

13

14

15

16

9

10

11

12

5

4

3

2

1

8

7

6

Cn+x

Cin

G2

P2

VDD

Cn+z

G

Cn+y

P0

G0

P1

G1

VSS

P

P3

G3