74193 Clock Datasheet

74193 Datasheet, PDF, Equivalent


Part Number

74193

Description

Synchronous 4-Bit Binary Counter with Dual Clock

Manufacture

Fairchild Semiconductor

Total Page 7 Pages
Datasheet
Download 74193 Datasheet


74193
September 1986
Revised March 2000
DM74LS193
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
HIGH.
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.
Features
s Fully independent clear input
s Synchronous operation
s Cascading circuitry provided internally
s Individual preset each flip-flop
Ordering Code:
Order Number
DM74LS193M
DM74LS193N
Package Number
Package Description
M16A
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150” Narrow Body
N16E
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide
Connection Diagram
© 2000 Fairchild Semiconductor Corporation DS006406
www.fairchildsemi.com

74193
Logic Diagram
www.fairchildsemi.com
2


Features DM74LS193 Synchronous 4-Bit Binary Count er with Dual Clock September 1986 Revi sed March 2000 DM74LS193 Synchronous 4 -Bit Binary Counter with Dual Clock Gen eral Description The DM74LS193 circuit is a synchronous up/down 4-bit binary c ounter. Synchronous operation is provid ed by having all flip-flops clocked sim ultaneously, so that the outputs change together when so instructed by the ste ering logic. This mode of operation eli minates the output counting spikes norm ally associated with asynchronous (ripp leclock) counters. The outputs of the f our master-slave flip-flops are trigger ed by a LOW-to-HIGH level transition of either count (clock) input. The direct ion of counting is determined by which count input is pulsed while the other c ount input is held HIGH. The counter is fully programmable; that is, each outp ut may be preset to either level by ent ering the desired data at the inputs wh ile the load input is LOW. The output w ill change independently of the count pulses. This feature allo.
Keywords 74193, datasheet, pdf, Fairchild Semiconductor, Synchronous, 4-Bit, Binary, Counter, with, Dual, Clock, 4193, 193, 93, 7419, 741, 74, Equivalent, stock, pinout, distributor, price, schematic, inventory, databook, Electronic, Components, Parameters, parts, cross reference, chip, Semiconductor, circuit, Electric, manual, substitute




@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site (Privacy Policy & Contact)