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54ACTQ544F bảng dữ liệu(PDF) 2 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
tên linh kiện 54ACTQ544F
Giải thích chi tiết về linh kiện  Quiet Series Octal Registered Transceiver with TRI-STATE Outputs
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nhà sản xuất  NSC [National Semiconductor (TI)]
Trang chủ  http://www.national.com
Logo NSC - National Semiconductor (TI)

54ACTQ544F bảng dữ liệu(HTML) 2 Page - National Semiconductor (TI)

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Connection Diagrams
Functional Description
The ACTQ544 contains two sets of eight D-type latches, with
separate input and output controls for each set. For data flow
from A to B, for example, the A-to-B Enable (CEAB) input
must be LOW in order to enter data from A
0 –A7 or take data
from B
0 –B7, as indicated in the Data I/O Control Table. With
CEAB LOW, a LOW signal on the A-to-B Latch Enable
(LEAB) input makes the A-to-B latches transparent; a subse-
quent LOW-to-HIGH transition of the LEAB signal puts the A
latches in the storage mode and their outputs no longer
change with the A inputs. With CEAB and OEAB both LOW,
the TRI-STATE B output buffers are active and reflect the
data present at the output of the A latches. Control of data
flow from B to A is similar, but using the CEBA, LEBA and
OEBA inputs.
Data I/O Control Table
Inputs
Latch
Output
CEAB
LEAB
OEAB
Status
Buffers
H
X
X
Latched
High Z
X
H
X
Latched
L
L
X
Transparent
X
X
H
High Z
L
X
L
Driving
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
A-to-B data flow shown; B-to-A flow control is the same, except using
CEBA, LEBA and OEBA
Pin Assignment for
DIP and Flatpak
DS100248-2
Pin Assignment
for LCC
DS100248-3
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