74VCX16721MTD Ver la hoja de datos (PDF) - Fairchild Semiconductor
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74VCX16721MTD
Fairchild Semiconductor
74VCX16721MTD Datasheet PDF : 9 Pages
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Connection Diagram
Logic Diagram
Truth Table
CLK
CE
OE
D0–D19
X
X
H
X
X
H
L
X
L
L
L
L
L
H
L or H
L
L
X
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial (HIGH or LOW, inputs may not float)
Z = High Impedance
O0 = Previous O0 before LOW-to-HIGH transition of Clock
= LOW-to-HIGH transition
O0–O19
Z
O0
L
H
O0
Functional Description
The VCX16721 contains twenty D-type flip-flops with
3-STATE standard outputs. The twenty flip-flops will store
the state of their individual D-type inputs that meet the
setup and hold time requirements on the LOW-HIGH Clock
(CLK) transition, when the Clock-Enable (CE) is LOW. The
3-STATE standard outputs are controlled by the Output-
Enable (OE). When OE is HIGH, the standard outputs are
in high impedance mode but this does not interfere with
entering new data into the flip-flops.
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