MC74ACT259 Motorola, MC74ACT259 Datasheet - Page 2

• Manufacturer Part Number: MC74ACT259
• Description: 8-BIT ADDRESSABLE LATCH
• Manufacturer: Motorola

MODE SELECT TABLE
H = HIGH Voltage Level
L = LOW Voltage Level
MODE SELECT-FUNCTION TABLE
Master Reset
Demultiplex
Demultiplex
Demultiplex
(Active HIGH
(Active HIGH
(Active HIGH
(Active HIGH
Decoder when
Decoder when
Decoder when
Decoder when
Decoder when
D = H)
D = H)
D = H)
D = H)
D = H)
D = H)
Store
(Do Nothing)
(Do Nothing)
Addressable
Addressable
Addressable
Addressable
Latch
Latch
Latch
Latch
Latch
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
d = HIGH or LOW Data one setup time prior to the LOW-to-HIGH Enable transition
q = Lower case letters indicate the state of the referenced output established during the last cycle in which it was addressed
H
H
E
L
L
Operating
Operating
or cleared.
Mode
Mode
MR
H
H
L
L
Addressable Latch
Memory
Active HIGH 8-Channel Demultiplexer
Clear
MR
H
H
H
H
H
H
L
L
L
L
L
H
H
H
E
L
L
L
L
L
L
L
L
D
X
X
X
Inputs
d
d
d
d
d
d
d
d
Mode
A 0
X
H
H
X
X
H
H
L
L
L
L
A 1
H
H
H
H
X
L
L
X
X
L
L
MC74AC259 MC74ACT259
A 2
X
H
X
X
H
L
L
L
L
L
L
Q = d
Q = d
Q 0
q 0
q 0
q 0
q 0
q 0
L
L
L
L
Q = d
Q = d
Q 1
q 1
q 1
q 1
q 1
q 1
FACT DATA
L
L
L
L
5-2
Q = d
Q = d
Q 2
q 2
q 2
q 2
q 2
q 2
L
L
L
L
Q 3
q 3
q 3
q 3
q 3
q 3
q 3
L
L
L
L
L
Outputs
Q 4
q 4
q 4
q 4
q 4
q 4
q 4
L
L
L
L
L
Q 5
q 5
q 5
q 5
q 5
q 5
q 5
L
L
L
L
L
Q 6
q 6
q 6
q 6
q 6
q 6
q 6
L
L
L
L
L
Q = d
Q = d
Q 7
q 7
q 7
q 7
q 7
q 7
L
L
L
L