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TC74HC670AP Datasheet(PDF) 2 Page - Toshiba Semiconductor

Part # TC74HC670AP
Description  CMOS Digital Integrated Circuit Silicon Monolithic 4 Word 횞 4 Bit Register File (3-state)
PDF  10 Pages
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Manufacturer  TOSHIBA [Toshiba Semiconductor]
Direct Link  http://www.semicon.toshiba.co.jp/eng
Logo TOSHIBA - Toshiba Semiconductor

TC74HC670AP Datasheet(HTML) 2 Page - Toshiba Semiconductor

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TC74HC670AP/AF
2007-10-01
2
IEC Logic Symbol
Truth Table
Write Function Table
Write Inputs
Words
WB
WA
WE
0
1
2
3
L
L
L
Q
= D
Q0
Q0
Q0
L
H
L
Q0
Q
= D
Q0
Q0
H
L
L
Q0
Q0
Q
= D
Q0
H
H
L
Q0
Q0
Q0
Q
= D
X
X
H
Q0
Q0
Q0
Q0
Read Function Table
Read Inputs
Outputs
RB
RA
RE
Q1
Q2
Q3
Q4
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
Z
Z
Z
X: Don’t care
Z: High impedance
(Q
= D): The four selected internal flip-flop outputs will assume the states applied to the four external data inputs.
Q0: The level of Q before the indicated input conditions were established.
W0B1: The first bit of word 0, etc.
Block Diagram



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