© Semiconductor Components Industries, LLC, 1999

December, 1999 – Rev. 6

1

Publication Order Number:

SN74LS85/D

SN74LS85

4-Bit Magnitude

Comparator

The SN74LS85 is a 4-Bit Magnitude Camparator which compares

two 4-bit words (A, B), each word having four Parallel Inputs

is not restricted to binary codes, the device will work with any

monotonic code. Three Outputs are provided: “A greater than B”

gates. For proper compare operation, the Expander Inputs to the least

Inputs of the next most significant comparator, as shown in Figure 1.

Refer to Applications section of data sheet for high speed method of

comparing large words.

The Truth Table on the following page describes the operation of the

SN74LS85 under all possible logic conditions. The upper 11 lines

describe the normal operation under all conditions that will occur in a

single device or in a series expansion scheme. The lower five lines

describe the operation under abnormal conditions on the cascading

inputs. These conditions occur when the parallel expansion technique

is used.

GUARANTEED OPERATING RANGES

Symbol

Parameter

Min

Typ

Max

Unit

Supply Voltage

4.75

5.0

5.25

V

Operating Ambient

Temperature Range

0

25

70

°C

Output Current – High

– 0.4

mA

Output Current – Low

8.0

mA

LOW

POWER

SCHOTTKY

Device

Package

Shipping

ORDERING INFORMATION

SN74LS85N

16 Pin DIP

2000 Units/Box

SN74LS85D

16 Pin

SOIC

D SUFFIX

CASE 751B

http://onsemi.com

2500/Tape & Reel

PLASTIC

N SUFFIX

CASE 648

16

1

16

1