2000 Mar 14

4

Philips Semiconductors

Product specification

8-bit addressable latch

74AHC259;

74AHCT259

FUNCTION TABLE

See note 1.

Note

1. H = HIGH voltage level;

L = LOW voltage level;

X = don’t care;

d = HIGH or LOW data one set-up time prior to the LOW-to-HIGH LE transition;

q = lower case letters indicate the state of the referenced output established during the last cycle in which it was

addressed or cleared.

ORDERING INFORMATION

OPERATING MODE

INPUTS

OUTPUTS

MR

LE

D

A0

A1

A2

Q0Q1Q2Q3Q4Q5Q6Q7

reset

L

H

XXXX

LLLLLLLL

demultiplexer

(active HIGH

8-channel)

decoder (when D = H)

LL

dLLL

Q = d

LLLLLLL

d

H

L

L

L

Q = d

LLLLLL

d

L

H

L

LL

Q = d

LLLLL

d

H

H

L

LLL

Q = d

LLLL

d

L

L

H

LLLL

Q = d

LLL

d

H

L

H

LLLLL

Q = d

L

L

d

L

H

H

LLLLLL

Q = d

L

d

H

H

H

LLLLLLL

Q = d

memory (do nothing)

H

H

XXXX

addressable latch

H

L

dLLL

Q = d

dHL

L

Q=d

d

LHL

Q=d

dH

HL

Q=d

dLL

H

Q=d

dHLH

Q=d

dL

H

H

Q=d

HHHH

Q=d

TYPE NUMBER

PACKAGES

TEMPERATURE

RANGE

PINS

PACKAGE

MATERIAL

CODE

74AHC259D

−40 to +125 °C

16

SO

plastic

SOT109-1

74AHC259PW

16

TSSOP

plastic

SOT403-1

74AHCT259D

16

SO

plastic

SOT109-1

74AHCT259PW

16

TSSOP

plastic

SOT403-1