What is presettable counter?
What is presettable counter?
PRESETTABLE 4-BIT BINARY UP/DOWN COUNTER. The SN54/74LS192 is an UP/DOWN BCD Decade (8421) Counter and the SN54/74LS193 is an UP/DOWN MODULO-16 Binary Counter. Separate Count Up and Count Down Clocks are used and in either counting mode the circuits operate synchronously.
What is a presettable counter and ripple counter?
PRESETTABLE 4-BIT BINARY UP/DOWN COUNTERS. The SN54/74LS190 is a synchronous UP/DOWN BCD Decade (8421) Counter and the SN54/74LS191 is a synchronous UP/DOWN Modulo-16 Binary Counter. State changes of the counters are synchronous with the LOW-to-HIGH transition of the Clock Pulse input.
What is synchronous counter in digital electronics?
Synchronous Counters are so called because the clock input of all the individual flip-flops within the counter are all clocked together at the same time by the same clock signal.
What do you mean by presettable synchronous counter?
The 74LVC161 is a synchronous presettable binary counter which features an internal look-ahead carry and can be used for high-speed counting. Synchronous operation is provided by having all flip-flops clocked simultaneously on the positive-going edge of the clock (pin CP).
What are the applications of presettable counters?
The 74HC/HCT161 are presettable synchronous 4-bit binary counters with asynchronous reset. These devices are high speed silicon-gate CMOS devices that are pin compatible with low power Schottky TTL (LSTTL). They feature an internal look-ahead carry and can be utilized for high-speed counting.
What are applications of synchronous counters?
Applications of Synchronous Counters Some common uses and application of synchronous counters are follow: Alarm Clock, Set AC Timer, Set time in camera to take the picture, flashing light indicator in automobiles, car parking control etc. Counting the time allotted for special process or event by the scheduler.
What is the meaning of presettable?
Presettable meaning Capable of being set in advance. A presettable timer.
What does the term asynchronous mean in relation to counters?
Asynchronous counters are those whose output is free from the clock signal. Because the flip flops in asynchronous counters are supplied with different clock signals, there may be delay in producing output. The required number of logic gates to design asynchronous counters is very less. So they are simple in design.
What are the different types of presettable counters?
Presettable counters can be UP counters, DOWN counters or UP/DOWN counters. These consist of additional input/output pins such as ‘Preset’ (To load any desired count), Parallel Load (PL) inputs (allows PRESET inputs to be loaded to the outputs), and Terminal Count (TC) outputs (becomes active when terminal count is reached.).
How are counters used in a digital circuit?
Counters are used in digital electronics for counting purpose, they can count specific event happening in the circuit. For example, in UP counter a counter increases count for every rising edge of clock. Not only counting, a counter can follow the certain sequence based on our design like any random sequence 0,1,3,2….
What kind of counter is a decade decoder?
It is a 16 pin, CMOS logic Decade Counter cum Decoder, used mainly for low range counting applications. It can count from zero to ten, with decoded outputs, thus saving a lot of board space and time. Given below is the functionality of each of its pins.
Which is the best counter in digital logic?
Counters in Digital Logic 1 Asynchronous Counter In asynchronous counter we don’t use universal clock, only first flip flop is driven by main… 2 Synchronous Counter More
What is presettable counter? PRESETTABLE 4-BIT BINARY UP/DOWN COUNTER. The SN54/74LS192 is an UP/DOWN BCD Decade (8421) Counter and the SN54/74LS193 is an UP/DOWN MODULO-16 Binary Counter. Separate Count Up and Count Down Clocks are used and in either counting mode the circuits operate synchronously. What is a presettable counter and ripple counter? PRESETTABLE 4-BIT…