m54hc323 STMicroelectronics, m54hc323 Datasheet - Page 2

• Manufacturer Part Number: m54hc323
• Description: Clear Hc299 /hc323 8bitpiposhiftregisterwithsynchronous
• Manufacturer: STMicroelectronics

M54/M74HC299/323
INPUT AND OUTPUT EQUIVALENT CIRCUIT
TRUTH TABLE
* When one or both output controls are high, the eight, input/output terminals are in thehigh impedance state: however sequential operation or clearing
of the register is not affected.
Z
Qn0 : THE LEVEL OF An BEFORE THE INDICATED STEADY STATE INPUT CONDITIONS WERE ESTABLISHED.
Qnn : THE LEVEL ON Qn BEFORE THE MOST RECENT ACTIVE TRANSITION INDICATED BY
a, h : THE LEVEL OF THE STEADY STATE INPUTS A, H, RESPECTIVELY.
X
2/15
CLEAR
RIGHT
MODE
SHIFT
SHIFT
HOLD
LOAD
LEFT
: HIGH IMPEDANCE
: DON’T CARE
Z
CLEAR
H
H
H
H
H
H
L
L
L
SELECTED
FUNCTION
S1
H
H
H
H
X
L
L
L
L
S0
H
X
H
H
H
L
L
L
L
INPUTS
G1 *
CONTROL
X
X
L
L
L
L
L
L
L
OUTPUT
G2 *
X
L
L
L
L
L
L
L
X
(299)
X
X
CLOCK
X
X
(323)
SL
X
X
X
X
X
X
H
L
X
SERIAL
INPUTS/OUTPUTS
SR
X
X
X
X
H
X
X
X
L
A/QA
OR
QA0
QBn
QBn
H
Z
L
L
L
a
H/QH
QGn
QGn
QH0
H
Z
L
L
L
h
QA0
QBn
QBn
QA’
OUTPUTS
H
L
L
L
L
a
QH0
QGn
QGn
QH’
L
L
L
H
L
h