HD74LS85 查看數據表（PDF） - Renesas Electronics

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HD74LS85

4-bit Magnitude Comparator

Renesas Electronics 

HD74LS85

4-bit Magnitude Comparator

REJ03D0421–0200

Rev.2.00

Feb.18.2005

This four bit magnitude comparator performs comparison of straight binary and straight BCD (8-4-2-1) codes. Three

fully decoded decisions about two 4-bit words (A, B) are made and are externally available at three outputs. This

device is fully expandable to any number of bits without external gates. Words of greater length may be compared by

connecting comparators in cascade. The A > B, A < B, and A = B outputs of a stage handling less-significant bits. The

stage handling the least- significant bits must have a high-level voltage applied to the A β B input. The cascading path

is implemented with only a two-gate-level delay to reduce overall comparison times for long words.

Features

• Ordering Information

Part Name

Package Type

Package Code

(Previous Code)

Package

Abbreviation

HD74LS85P

DILP-16 pin

PRDP0016AE-B

P

(DP-16FV)

HD74LS85FPEL SOP-16 pin (JEITA)

PRSP0016DH-B

(FP-16DAV)

FP

Note: Please consult the sales office for the above package availability.

Taping Abbreviation

(Quantity)

—

EL (2,000 pcs/reel)

Pin Arrangement

B3

Data Input

1

A<B 2

Cascade

Inputs

A=B

3

A>B 4

A>B 5

Outputs A=B 6

A<B 7

GND 8

B3

A<B

A3

A=B In B2

A>B

A2

A>B

A1

A=B Out B1

A<B

A0

B0

16 VCC

15 A3

14 B2

13 A2

12 A1 Data Inputs

11 B1

10 A0

9 B0

(Top view)

Rev.2.00, Feb.18.2005, page 1 of 6

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