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74LS569 датащи(PDF) 3 Page - Motorola, Inc

номер детали 74LS569
подробное описание детали  FOUR-BIT UP/DOWN COUNTER WITH THREE-STATE OUTPUTS
PDF  8 Pages
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производитель  MOTOROLA [Motorola, Inc]
домашняя страница  http://www.freescale.com
Logo MOTOROLA - Motorola, Inc

74LS569 датащи(HTML) 3 Page - Motorola, Inc

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FAST AND LS TTL DATA
SN54/74LS569A
DEFINITION OF FUNCTIONAL TERMS
A, B, C, D
The four programmable data inputs.
CEP
Count Enable Parallel. Can be used to
enable and inhibit counting in high speed
cascaded operation. CEP must be LOW to
count.
CET
Count Enable Trickle. Enables the ripple
carry output for cascaded operation. Must
be LOW to count.
CP
Clock Pulse. All synchronous functions
occur on the LOW-to-HIGH transition of the
clock.
LOAD
Enables parallel load of counter outputs
from data inputs on the next clock edge.
Must be HIGH to count.
U/D
Up/Down Count Control. HIGH counts up
and LOW counts down.
ACLR
Asynchronous Clear. Master reset of
counters to zero when ACLR is LOW,
independent of the clock.
SCLR
Synchronous clear of counters to zero on
the next clock edge when SCLR is LOW.
OE
A HIGH on the output control sets the four
counter outputs in the high impedance, and
a LOW, enables the output.
YA, YB, YC, YD The four counter outputs.
RCO
Ripple Carry Output. Output will be LOW on
the maximum count on up-count. Upon
down-count, RCO is LOW at 0000.
CCO
Clock Carry Output. While counting and
RCO is LOW, CCO will follow the clock
HIGH-LOW-HIGH transition.
Note: Actual current flow direction shown
DRIVING OUTPUT
DRIVING OUTPUT
DRIVEN INPUT
VCC
IOL
IOH
IOL
IOH IIL
IIH
LOW-POWER SCHOTTKY INPUT/OUTPUT
CURRENT INTERFACE CONDITIONS



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