SN54ALS810, SN54AS810, SN74ALS810, SN74AS810

QUADRUPLE 2INPUT EXCLUSIVENOR GATES

SDAS160 − D2837, MARCH 1984 − REVISED OCTOBER 1988

POST OFFICE BOX 655303

POST OFFICE BOX 1443

2

exclusive-NOR logic

An Exclusive-NOR gate has many applications, some of which can be represented better by alternative logic

symbols.

= 1

EXCLUSIVE-NOR

These are five equivalent Exclusive-NOR symbols valid for an ’ALS810 gate in positive logic; negation may be

shown at any one port or at all three of them.

2k + 1

2k

=

EVEN-PARITY

ODD-PARITY ELEMENT

LOGIC IDENTITY ELEMENT

The output is active (low) if an odd

number of inputs (i.e., only 1 of

the 2) are active.

The output is active (high) if an

even

number of inputs (i.e., only 0 or 2)

are active.

The output is active (high) if all

inputs stand at the same logic level

(i.e., A = B).