даташит 74193 PDF ( Datasheet )

74193 Datasheet Download - Fairchild Semiconductor

Номер произв 74193
Описание Synchronous 4-Bit Binary Counter with Dual Clock
Производители Fairchild Semiconductor
логотип Fairchild Semiconductor логотип 


No Preview Available !

74193 Даташит, Описание, Даташиты
September 1986
Revised March 2000
Synchronous 4-Bit Binary Counter with Dual Clock
General Description
The DM74LS193 circuit is a synchronous up/down 4-bit
binary counter. Synchronous operation is provided by hav-
ing all flip-flops clocked simultaneously, so that the outputs
change together when so instructed by the steering logic.
This mode of operation eliminates the output counting
spikes normally associated with asynchronous (ripple-
clock) counters.
The outputs of the four master-slave flip-flops are triggered
by a LOW-to-HIGH level transition of either count (clock)
input. The direction of counting is determined by which
count input is pulsed while the other count input is held
The counter is fully programmable; that is, each output may
be preset to either level by entering the desired data at the
inputs while the load input is LOW. The output will change
independently of the count pulses. This feature allows the
counters to be used as modulo-N dividers by simply modi-
fying the count length with the preset inputs.
A clear input has been provided which, when taken to a
high level, forces all outputs to the low level; independent
of the count and load inputs. The clear, count, and load
inputs are buffered to lower the drive requirements of clock
drivers, etc., required for long words.
These counters were designed to be cascaded without the
need for external circuitry. Both borrow and carry outputs
are available to cascade both the up and down counting
functions. The borrow output produces a pulse equal in
width to the count down input when the counter underflows.
Similarly, the carry output produces a pulse equal in width
to the count down input when an overflow condition exists.
The counters can then be easily cascaded by feeding the
borrow and carry outputs to the count down and count up
inputs respectively of the succeeding counter.
s Fully independent clear input
s Synchronous operation
s Cascading circuitry provided internally
s Individual preset each flip-flop
Ordering Code:
Order Number
Package Number
Package Description
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150” Narrow Body
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide
Connection Diagram
© 2000 Fairchild Semiconductor Corporation DS006406

No Preview Available !

74193 Даташит, Описание, Даташиты
Logic Diagram

No Preview Available !

74193 Даташит, Описание, Даташиты
Timing Diagram
Note A: Clear overrides load, data, and count inputs
Note B: When counting up, count-down input must be HIGH; when counting down, count-up input must be HIGH.

Всего страниц 7 Pages
Скачать PDF[ 74193.PDF Даташит ]

Ссылка Поделиться

Related Datasheets

Номер в каталогеОписаниеПроизводители
74190Synchronous Decade Up/Down CountersNational Semiconductor
National Semiconductor
74190Synchronous Up/Down Counters With Down/Up Mode ControlTexas Instruments
Texas Instruments
74191Synchronous 4-Bit Up/Down Counter with Mode ControlFairchild Semiconductor
Fairchild Semiconductor

Номер в каталоге Описание Производители

Intelligent Power Module

Fuji Electric
Fuji Electric

18 GHz Microwave PLL Synthesizer

Analog Devices
Analog Devices

Low Loss Power Distribution Switch

Silergy    |    2019    |   Контакты    |    Поиск