TC74HC259AP/AF/AFN

2007-10-01

2

IEC Logic Symbol

Truth Table

Inputs

CLEAR

G

Output of

Addressed

Latch

Each Other

Output

Function

H

L

D

QiO

Addressable Latch

H

H

QiO

QiO

Memory

L

L

D

L

8-Line Demultriplexer

L

H

L

L

Clear All Bits to “L”

Select Inputs

C

B

A

Latch Addressed

L

L

L

Q0

L

L

H

Q1

L

H

L

Q2

L

H

H

Q3

H

L

L

Q4

H

L

H

Q5

H

H

L

Q6

H

H

H

Q7

D: The level at the data input.

QiO: The level before the indicared steady-state input conditions were established (i

= 0, 1, .... 7)