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74VCX16839 ๋ฐ์ดํ„ฐ์‹œํŠธ(HTML) 2 Page - Fairchild Semiconductor

๋ถ€ํ’ˆ๋ช… 74VCX16839
์ƒ์„ธ๋‚ด์šฉ  Low Voltage 20-Bit Selectable Register/Buffer with 3.6V Tolerant Inputs and Outputs
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์ œ์กฐ์‚ฌ  FAIRCHILD [Fairchild Semiconductor]
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Connection Diagram
Truth Table
H
= Logic HIGH
L
= Logic LOW
X
= Donโ€™t Care, but not floating
Z
= High Impedance
โ†‘ = LOW-to-HIGH Clock Transition
Functional Description
The 74VCX16839 consists of twenty selectable non-invert-
ing buffers or registers with word wide modes. Mode func-
tionality is selected through operation of the CLK and
REGE pin as shown by the truth table. When REGE is held
at a logic HIGH the device operates as a 20-bit register.
Data is transferred from In to On on the rising edge of the
CLK input. When the REGE pin is held at a logic LOW the
device operates in a flow through mode and data propa-
gates directly from the In to the On outputs. All outputs can
be 3-stated by holding the OE pin at a logic HIGH.
Logic Diagram
Inputs
Outputs
CLK
REGE
In
OE
On
โ†‘
HH
L
H
โ†‘
HL
L
L
XL
H
L
H
X
LLL
L
XXX
H
Z


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