m74hc259 STMicroelectronics, m74hc259 Datasheet - Page 2

• Manufacturer Part Number: m74hc259
• Description: 8 Bit Addressable Latch
• Manufacturer: STMicroelectronics

M74HC259
INPUT AND OUTPUT EQUIVALENT CIRCUIT
TRUTH TABLE
D : The level at the data input
Qi0 : The level before the indicated steady state input conditions where established, (i = 0, 1, ......., 7).
2/13
CLEAR
H
H
L
L
INPUTS
C
H
H
H
H
L
L
L
L
ENABLE
H
H
L
L
ADDRESSED LATCH
SELECT INPUTS
OUTPUTS OF
Qi0
D
D
B
H
H
H
H
L
L
L
L
L
EACH OTHER OUTPUT
PIN DESCRIPTION
4, 5, 6, 7, 9,
10, 11, 12
PIN No
1, 2, 3
13
14
15
16
8
Qi0
Qi0
A
H
H
H
H
L
L
L
L
L
L
SYMBOL
Q0 to Q7
ENABLE
CLEAR
A, B, C
GND
Vcc
D
8 LINE DEMULTIPLEXER
ADDRESSABLE LATCH
CLEAR ALL BITS TO ’L’
Address Inputs
Latch Outputs
Data Input
Latch Enable Input (Active
Low)
Conditional Reset Input
(Low)
Ground (0V)
Positive Supply Voltage
LATCH ADDRESSED
NAME AND FUNCTION
FUNCTION
MEMORY
Q0
Q1
Q2
Q3
Q4
Q5
Q6
Q7