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M74HC670 Folha de dados(PDF) 2 Page - STMicroelectronics

Nome de Peças M74HC670
Descrição Electrónicos  4 WORD X 4 BIT REGISTER FILE 3 STATE
PDF  12 Pages
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Fabricante Electrônico  STMICROELECTRONICS [STMicroelectronics]
Página de início  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M74HC670 Folha de dados(HTML) 2 Page - STMicroelectronics

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LOGIC DIAGRAM
WRITE FUNCTION TABLE
WRITE INPUTS
WORDS
WB
WA
WE
0
1
2
3
L
L
L
Q = D
Q0Q0Q0
LHL
Q0
Q = D
Q0
Q0
HL
L
Q0
Q0
Q = D
Q0
H
H
L
Q0Q0Q0
Q = D
X
X
H
Q0
Q0
Q0
Q0
READ FUNCTION TABLE
READ INPUTS
OUTPUTS
RB
RA
RE
Q0
Q1
Q2
Q3
L
L
L
W0B1 W0B2 W0B3 W0B4
L
H
L
W1B1 W1B2 W1B3 W1B4
H
L
L
W2B1 W2B2 W2B3 W2B4
H
H
L
W3B1 W3B2 W3B3 W3B4
X
X
H
Z
ZZZ
Notes: 1 *: DON’T CARE Z: HIGH IMPEDANCE
2 (Q = D) = THE FOUR SELECT INTERNAL FLIP FLOP OUTPUTS WILL ASSUME THE STATES APPLIED TO THE FOUR
EXTERNAL DATA INPUTS.
3 Q0 = THE LEVEL OF Q BEFORE THE INDICATED INPUT CONDITIONS WERE ESTABLISHED.
4 W0B1 = THE FIRST BIT OF WORD 0, ETC.
M54/M74HC670
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