74VCX16821MTDX(2004) Просмотр технического описания (PDF) - Fairchild Semiconductor
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Компоненты Описание
производитель
74VCX16821MTDX
(Rev.:2004)
(Rev.:2004)
Fairchild Semiconductor
74VCX16821MTDX Datasheet PDF : 9 Pages
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Connection Diagram
Logic Diagrams
Truth Tables
Inputs
Outputs
CLK1
OE1
D0–D9
O0–O9
X
H
X
Z
L
L
L
L
H
H
L or H
L
X
O0
Inputs
Outputs
CLK2
OE2
D10–D19 O10–O19
X
H
X
Z
L
L
L
L
H
H
L or H
L
X
O0
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
Functional Description
The VCX16821 contains twenty D-type flip-flops with
3-STATE standard outputs. The device is byte controlled
with each byte functioning identically, but independent of
each other. Control pins can be shorted together to obtain
full 20-bit operation. The following description applies to
each byte. 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-to-HIGH Clock (CLK) transition.
The 3-STATE standard outputs are controlled by the Out-
put Enable (OEn) input. When OEn is HIGH, the standard
outputs are in the high impedance mode but this does not
interfere with entering new data into the flip-flops.
Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays.
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