MC14582B Просмотр технического описания (PDF) - Motorola => Freescale

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MC14582B

Look-Ahead Carry Block

Motorola => Freescale 

MOTOROLA

SEMICONDUCTOR TECHNICAL DATA

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

ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ Schottky TTL Load over the Rated Temperature Range

ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ MAXIMUM RATINGS* (Voltages Referenced to VSS)

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),

± 10

mA

per Pin

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

Designation

G0, G1, G2, G3

PIN DESIGNATIONS

Pin No’s

Function

3, 1, 14, 5

Active–Low

Carry–Generate Inputs

P0, P1, P2, P3

4, 2, 15, 6

Active–Low

Carry–Propagate Inputs

Cn

Cn+x, Cn+y

Cn+z

G

13

12, 11, 9

10

Carry Input

Carry Outputs

Active–Low Group

Carry–Generate Output

P

7

Active–Low Group

Carry–Propagate Output

REV 3

1/94

©MMOotoTrOolaR, IOncL. A199C5MOS LOGIC DATA

MC14582B

L SUFFIX

CERAMIC

CASE 620

P SUFFIX

PLASTIC

CASE 648

D SUFFIX

SOIC

CASE 751B

ORDERING INFORMATION

MC14XXXBCP

MC14XXXBCL

MC14XXXBD

Plastic

Ceramic

SOIC

TA = – 55° to 125°C for all packages.

PIN ASSIGNMENT

G1 1

P1 2

16 VDD

15 P2

G0 3

14 G2

P0 4

G3 5

P3 6

P7

13 Cin

12 Cn+x

11 Cn+y

10 G

VSS 8

9 Cn+z

MC14582B

1

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