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TC74HC697AP Datasheet(PDF) 3 Page - Toshiba Semiconductor

Part No. TC74HC697AP
Description  Synchronous Presettable 4-Bit Binary Up/Down Counter with Output Register
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Maker  TOSHIBA [Toshiba Semiconductor]
Homepage  http://www.semicon.toshiba.co.jp/eng
Logo TOSHIBA - Toshiba Semiconductor

TC74HC697AP Datasheet(HTML) 3 Page - Toshiba Semiconductor

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TC74HC697AP/AF
2007-10-01
3
Truth Table
Inputs
Outputs
CCLR
LOAD
ENP
ENT
CCK
D
U/
RCK
C
R/
G
QA
QB
QC
QD
Function
X
X
X
X
X
X
X
X
H
Z
Z
Z
Z
Z
L
X
X
X
X
X
X
L
L
L
L
L
L
Clear Counter
H
L
X
X
X
X
L
L
a
b
c
d
Load Counter
H
H
H
X
X
X
L
L
H
H
X
H
X
X
L
L
No Change
No Count
H
H
L
L
H
X
L
L
Count Up
Count
H
H
L
L
L
X
L
L
Count Down
Count
H
X
X
X
X
X
L
L
No Change
No Count
X
X
X
X
X
X
H
L
a’
b’
c’
d’
Load Register
X
X
X
X
X
X
H
L
No Change
No Count
X: Don’t care
Z: High impedance
a~d: The level of steady state inputs at inputs A through D respectively.
a’~d’: The level of steady state outputs at internal counter outputs QA’ through QD’ respectively.
RCO
= (
ENT
QD
QC
QB
QA
UP
ENT
QD
QC
QB
QA
UP
+
)


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