HCC4029BF STMICROELECTRONICS [STMicroelectronics], HCC4029BF Datasheet - Page 8

• Manufacturer Part Number: HCC4029BF
• Description: BINARY OR BCD DECADE PRESETTABLE UP/DOWN COUNTER
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

HCC/HCF4029B
APPLICATIONS
Conversion of Clock up, Clock Down Input Sig-
nals to Clock and Up/Down Inputs Signals.
Cascading Counter Packages.
*
Ripple Clocking Mode : The Up/Down control can be changed at any count. The only restriction on changing the Up/Down control is that the
clock input to the first counti n g stage must be high.
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CARRY-OUT lines at the 2nd, 3rd, et., stages may have a negative-going glitch pulse resulting from differential delays of different
HCC/HCF4029B IC’s. These negative-going glitches do not affect proper HCC/HCF4029B operation. However, if the CARRY-OUT signals
are used to trigger other edge-sensitive logic devices, such as FF’s or counters, the CARRY-OUT signals should be gated with the clock signal
using a 2-input NOR gate such as HCC/HCF4001B.
The HCC/HCF4029B CLOCK and UP/DOWN in-
puts are used directly in most applications. In appli-
cations where CLOCK UP and CLOCK DOWN
inputs
HCC/HCF4029B CLOCK and UP/DOWN inputs
can easily be realized by use of the circuit.
HCC/HCF4029B changes count on positive transi-
tions of CLOCK UP or CLOCK DOWN inputs. For
the gate configuration shown below, when counting
up the CLOCK DOWN input must be maintained
high and conversely when counting down the
CLOCK UP input must be maintained high.
are
provided,
conversion
to
the