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74VCX162839 Datasheet(PDF) 2 Page - Fairchild Semiconductor

Part No. 74VCX162839
Description  Low Voltage 20-Bit Selectable Register/Buffer with 3.6V Tolerant Inputs and Outputs and 26Ω Series Resistors in the Outputs
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Maker  FAIRCHILD [Fairchild Semiconductor]
Homepage  http://www.fairchildsemi.com
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74VCX162839 Datasheet(HTML) 2 Page - Fairchild Semiconductor

   
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Connection Diagram
Truth Table
H
= HIGH Voltage Level
L
= LOW Voltage Level
X
= Immaterial (HIGH or LOW, inputs may not float)
Z
= High Impedance
Functional Description
The 74VCX162839 consists of twenty selectable non-
inverting buffers or registers with word wide controls. Mode
functionality is selected through operation of the CP and
REGE pin as shown by the truth table. When REGE is held
at a logic “1” the device operates as a 20-bit register. Data
is transferred from In to On on the rising edge of the CP pin.
When the REGE pin is held at a logic “0” the device oper-
ates in a flow through mode and data propagates directly
from the In to the On outputs. All outputs can be 3-stated by
holding the OE pin at a logic “1.”
Logic Diagram
Inputs
Outputs
CP
REGE
In
OE
On
HH
L
H
HL
L
L
XL
H
L
H
X
LLL
L
XXX
H
Z


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