SN74LS256D MOTOROLA [Motorola, Inc], SN74LS256D Datasheet - Page 2

• Manufacturer Part Number: SN74LS256D
• Description: DUAL 4-BIT ADDRESSABLE LATCH
• Manufacturer: MOTOROLA [Motorola, Inc]

LOGIC DIAGRAM
14
V CC = PIN 16
GND = PIN 8
E
4
Q 0a
= PIN NUMBERS
3
D a
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
5
1
Q 1a
A 0
CL
H
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
L
L
E
H
H
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
6
2
Q 2a
A 1
D
X
H
H
H
H
X
H
H
H
H
L
L
L
L
L
L
L
L
E
H
H
L
L
A 0
15
7
X
H
H
H
H
X
H
H
H
H
FAST AND LS TTL DATA
L
L
L
L
L
L
L
L
CL
Q 3a
CL
SN54/74LS256
H
H
L
L
MODE SELECTION
TRUTH TABLE
13
MODE
Addressable Latch
Memory
Dual 4-Channel Demultiplexer
Clear
A 1
D b
H
H
H
H
H
H
H
H
X
X
L
L
L
L
L
L
L
L
5-422
Q N–1
Q N–1
Q N–1
Q N–1
Q N–1
Q N–1
Q N–1
Q 0
H
H
L
L
L
L
L
L
L
L
L
9
Q 0b
Q N–1
Q N–1
Q N–1
Q N–1
Q N–1
Q N–1
Q N–1
Q 1
H
H
L
L
L
L
L
L
L
L
L
10
Q N–1
Q N–1
Q N–1
Q N–1
Q N–1
Q N–1
Q N–1
Q 1b
Q 2
H
H
L
L
L
L
L
L
L
L
L
Q N–1
Q N–1
Q N–1
Q N–1
Q N–1
Q N–1
Q N–1
Q 3
H
H
L
L
L
L
L
L
L
L
L
11
Q 2b
Addressable
Demultiplex
Memory
MODE
Clear
Latch
12
Q 3b