HCC4029B 查看數據表（PDF） - STMicroelectronics

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HCC4029B

BINARY OR BCD DECADE PRESETTABLE UP/DOWN COUNTER

STMicroelectronics 

HCC/HCF4029B

counter reaches its maximum count in the UP mode

or the minimum count in the DOWN mode provided

the CARRY-IN signal is low. The CARRY-IN signal

in the low state can thus be considered a CLOCK

ENABLE. The CARRY-IN terminal must be con-

nected to VSS whennot in use. Binary counting is ac-

complished when the BINARY/DECADE input is

high ; the counter counts in the decade mode when

the BINARY/DECADE input is low. The counter

counts Up when to UP/DOWN INPUT is high, and

Down when the UP/DOWN INPUT is low. Multiple

packages can be connected in either a parallel-

clocking or a ripple-clocking arrangement as shown

in cascading counter packages. Parallel clocking

provides synchronous control and hence faster re-

sponse from all counting outputs. Ripple-clocking

allows for longer clock input rise and fall times.

FUNCTIONAL DIAGRAM

ABSOLUTE MAXIMUM RATING

Symbol

Parameter

Value

Unit

VDD * Supply Voltage: HCC Types

HCF Types

-0.5 to +20

V

-0.5 to +18

V

Vi

Input Voltage

II

DC Input Current (any one input)

-0.5 to VDD + 0.5

V

± 10

mA

Ptot Total Power Dissipation (per package)

Dissipation per Output Transistor

200

mW

for Top = Full Package Temperature Range

100

mW

Top Operating Temperature: HCC Types

HCF Types

-55 to +125

oC

-40 to +85

oC

Tstg Storage Temperature

-65 to +150

oC

Stresses above those listed under ”Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress ratingonly and functional

operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure

to absolute maximum rating conditions for external periods may affect device reliability.

All voltage values are referred to VSS pin voltage.

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