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74ALVC16821 датащи(PDF) 2 Page - Fairchild Semiconductor

номер детали 74ALVC16821
подробное описание детали  Low Voltage 20-Bit D-Type Flip-Flops with 3.6V Tolerant Inputs and Outputs
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производитель  FAIRCHILD [Fairchild Semiconductor]
домашняя страница  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

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Connection Diagram
Truth Tables
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 74ALVC16821 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.
Logic Diagrams
Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays.
Inputs
Outputs
CLK1
OE1
D0–D9
O0–O9
XH
X
Z

LL
L

LH
H
L or H
L
X
O0
Inputs
Outputs
CLK2
OE2
D10–D19
O10–O19
XH
X
Z

LL
L

LH
H
L or H
L
X
O0


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