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CD4514BM データシート(PDF) 5 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
部品番号 CD4514BM
部品情報  4-Bit Latched/4-to-16 Line Decoders
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メーカー  NSC [National Semiconductor (TI)]
ホームページ  http://www.national.com
Logo NSC - National Semiconductor (TI)

CD4514BM データシート(HTML) 5 Page - National Semiconductor (TI)

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Applications
Two CD4512 8-channel data selectors are used here with
the CD4514B 4-bit latchdecoder to effect a complex data
routing system A total of 16 inputs from data registers are
selected and transferred via a TRI-STATE
data bus to a
data distributor for rearrangement and entry into 16 output
registers In this way sequential data can be re-routed or
intermixed according to patterns determined by data select
and distribution inputs
Data is placed into the routing scheme via the 8 inputs on
both CD4512 data selectors One register is assigned to
each input The signals on A0 A1 and A2 choose 1-of-8
inputs for transfer out to the TRI-STATE data bus A fourth
signal labelled Dis disables one of the CD4512 selectors
assuring transfer of data from only one register
In addition to a choice of input registers 1 – 16 the rate of
transfer of the sequential information can also be varied
That is if the CD4512 were addressed at a rate that is
8 times faster than the shift frequency of the input registers
the most significant bit (MSB) from each register could be
selected for transfer to the data bus Therefore all of the
most significant bits from all of the registers can be trans-
ferred to the data bus before the next most significant bit is
presented for transfer by the input registers
Information from the TRI-STATE bus is redistributed by the
CD4514B 4-bit latchdecoder Using the 4-bit address
INA – IND the information on the inhibit line can be trans-
ferred to the addressed output line to the desired output
registers A – P This distribution of data bits to the output
registers can be made in many complex patterns For exam-
ple all of the most significant bits from the input registers
can be routed into output register A all of the next most
significant bits into register B etc In this way horizontal
vertical or other methods of data slicing can be implement-
ed
TLF5994 – 5
5


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同様の説明 - CD4514BM

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