4-Bit Magnitude Comparator

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Overview

The MC14585B 4-Bit Magnitude Comparator is constructed with complementary MOS (CMOS) enhancement mode devices. The circuit has eight comparing inputs (A3, B3, A2, B2, A1, B1, A0, B0), three cascading inputs (A < B, A = B, and A > B), and three outputs (A < B, A = B, and A > B). This device compares two 4-bit words (A and B) and determines whether they are "less than", "equal to", or "greater than" by a high level on the appropriate output. For words greater than 4-bits, units can be cascaded by connecting outputs (A > B), (A < B), and (A = B) to the corresponding inputs of the next significant comparator. Inputs (A < B), (A = B), and (A > B) on the least significant (first) comparator are connected to a low, a high, and a low, respectively.

Applications include logic in CPU's, correction and/or detection of instrumentation conditions, comparator in testers, converters, and controls.

  • Diode Protection on All Inputs
  • Expandable
  • Applicable to Binary or 8421-BCD Code
  • 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
  • Can be Cascaded - See Fig. 3
  • Pb-Free Packages are Available

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MC14585BDG

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CAD Model

Pb

A

H

P

SOIC-16

1

260

TUBE

48

N

Magnitude Comparator

3

18

360

0.5

2.25

Price N/A

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MC14585BDR2G

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Active

CAD Model

Pb

A

H

P

SOIC-16

1

260

REEL

2500

N

Magnitude Comparator

3

18

360

0.5

2.25

$0.2703

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NLV14585BDR2G

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Active

CAD Model

Pb

A

H

P

SOIC-16

1

260

REEL

2500

Y

Magnitude Comparator

3

18

360

0.5

2.25

$0.242

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