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74ACTQ16373MTDX View Datasheet(PDF) - Fairchild Semiconductor

Part Name
Description
Manufacturer
74ACTQ16373MTDX
Fairchild
Fairchild Semiconductor Fairchild
74ACTQ16373MTDX Datasheet PDF : 8 Pages
1 2 3 4 5 6 7 8
Functional Description
The ACTQ16373 contains sixteen D-type latches with 3-
STATE standard outputs. The device is byte controlled with
each byte functioning identically, but independent of the
other. Control pins can be shorted together to obtain full
16-bit operation. The following description applies to each
byte. When the Latch Enable (LEn) input is HIGH, data on
the Dn enters the latches. In this condition the latches are
transparent, i.e., a latch output will change states each time
its D input changes. When LEn is LOW, the latches store
information that was present on the D inputs a setup time
preceding the HIGH-to-LOW transition of LEn. The 3-
STATE standard outputs are controlled by the Output
Enable (OEn) input. When OEn is LOW, the standard out-
puts are in the 2-state mode. When OEn is HIGH, the stan-
dard outputs are in the high impedance mode but this does
not interfere with entering new data into the latches.
Logic Diagrams
Truth Tables
Inputs
LE1
OE1
X
H
H
L
H
L
L
L
I0–I7
X
L
H
X
Outputs
O0–O7
Z
L
H
(Previous)
Inputs
Outputs
LE2
OE2
I8–I15
O8–O15
X
H
X
Z
H
L
L
L
H
L
H
H
L
L
X
(Previous)
H HIGH Voltage Level
L LOW Voltage Level
X Immaterial
Z High Impedance
Previous previous output prior to HIGH-to-LOW transition of LE
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