74HC259 Philips, 74HC259 Datasheet - Page 5

• Manufacturer Part Number: 74HC259
• Description: 8-bit addressable latch
• Manufacturer: Philips

Philips Semiconductors
FUNCTION TABLE
Notes
1. H = HIGH voltage level
December 1990
OPERATING
MODES
master reset
demultiplex
(active HIGH)
decoder
(when D = H)
store (do nothing)
addressable latch
8-bit addressable latch
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
L
L
L
L
L
L
L
L
L
H
H
H
H
H
H
H
H
H
MR
H
L
L
L
L
L
L
L
L
H
L
L
L
L
L
L
L
L
LE
X
d
d
d
d
d
d
d
d
X
d
d
d
d
d
d
d
d
INPUTS
D
X
L
H
L
H
L
H
L
H
X
L
H
L
H
L
H
L
H
A
0
X
L
L
H
H
L
L
H
H
X
L
L
H
H
L
L
H
H
A
1
X
L
L
L
L
H
H
H
H
X
L
L
L
L
H
H
H
H
A
2
5
L
Q=d
L
L
L
L
L
L
L
q
Q=d
q
q
q
q
q
q
q
0
0
0
0
0
0
0
0
Q
0
L
L
Q=d
L
L
L
L
L
L
q
q
Q=d
q
q
q
q
q
q
1
1
1
1
1
1
1
1
Q
1
L
L
L
Q=d
L
L
L
L
L
q
q
q
Q=d
q
q
q
q
q
2
2
2
2
2
2
2
2
Q
2
L
L
L
L
Q=d
L
L
L
L
q
q
q
q
Q=d
q
q
q
q
OUTPUTS
3
3
3
3
3
3
3
3
Q
3
L
L
L
L
Q=d
L
L
L
q
q
q
q
q
Q=d
q
q
q
L
4
4
4
4
4
4
4
4
Q
4
74HC/HCT259
Product specification
L
L
L
L
L
L
Q=d
L
L
q
q
q
q
q
q
Q=d
q
q
5
5
5
5
5
5
5
5
Q
5
L
L
L
L
L
L
L
Q=d
L
q
q
q
q
q
q
q
Q=d
q
6
6
6
6
6
6
6
6
Q
6
L
L
L
L
L
L
L
L
Q=d
q
q
q
q
q
q
q
q
Q=d
7
7
7
7
7
7
7
7
Q
7