TTL Logic Counters
Reviewed by: Scott Orlosky, consulting engineer
Description
TTL (Transistor-Transistor Logic) logic counters are digital devices used to count the number of occurrences of an event. They are constructed using TTL technology, which employs bipolar junction transistors to perform logical operations. TTL counters are widely used in various digital applications due to their robustness and reliability. They can be found in devices that require counting, timing, and frequency division functionalities.
Working Principle
TTL logic counters operate by using flip-flops, which are basic memory elements that can store one bit of information. The counters can be either synchronous or asynchronous. In synchronous counters, all flip-flops are triggered simultaneously by a common clock signal, ensuring that the output bits change state at the same time. In asynchronous counters, each flip-flop is triggered by the output of the previous flip-flop, leading to a ripple effect where the state change propagates through the flip-flops sequentially. This difference in operation affects the speed and complexity of the counter.
Applications
TTL logic counters are used in a variety of applications, including digital clocks, frequency counters, event counters, and in digital systems for measuring time intervals. They are also employed in digital circuits for dividing frequencies, which is essential in applications like digital watches, timers, and in communication systems where precise timing is crucial.
Advantages over other Counters and Frequency Dividers
One of the main advantages of TTL logic counters over other types of counters is their speed and reliability. TTL technology allows for faster switching times compared to other logic families like CMOS. Additionally, TTL counters are less susceptible to noise and have better drive capabilities, making them suitable for applications requiring robust performance. Synchronous TTL counters, in particular, offer higher speed operation compared to asynchronous counters due to the simultaneous triggering of flip-flops.
Limitations
Despite their advantages, TTL logic counters have some limitations. They consume more power compared to CMOS counters, which can be a drawback in battery-operated devices. Additionally, the complexity of synchronous counters increases with the number of bits, requiring more hardware and design effort. Asynchronous counters, while simpler, suffer from propagation delays that limit their speed and accuracy.
Considerations
When selecting a TTL logic counter, it is important to consider the specific requirements of the application, such as the counting speed, power consumption, and the number of bits needed. The choice between synchronous and asynchronous counters will depend on the trade-off between speed and complexity. Additionally, the environmental conditions and the need for noise immunity should be taken into account to ensure reliable operation.
from Nexperia B.V.
The 74HC4040; 74HCT4040 is a 12-stage binary ripple counter with a clock input (CP), an overriding asynchronous master reset input (MR) and twelve parallel outputs (Q0 to Q11). The counter advances on the HIGH-to-LOW transition of CP. A HIGH on MR clears all counter stages and forces all outputs... [See More]
- Logic Family: TTL; TTL
- Supply Voltage: 5V; 4.5 - 5.5
- Counter Category: Asynchronous
- Package Type: SOT763-1
from RS Components, Ltd.
4-bit asynch binary counter,SN74LS93N [See More]
- Logic Family: Ls
- Supply Voltage: 5.25 v, 4.75 v
- Counter Type: Binary
- Package Type: DIP; Pdip
from Texas Instruments
Synchronous 4-Bit Counters 16-CDIP -55 to 125 [See More]
- Logic Family: TTL; TTL
- Package Type: CDIP,CFP
- Counter Category: Synchronous
- Operating Temperature: -55 to 125
from Rochester Electronics
54196 - Decade Counter, Asynchronous, Up Direction, TTL [See More]
- Logic Family: TTL
- Counter Direction: UP
- Counter Category: Synchronous; Asynchronous
- Package Type: DIP; CDIP
from Nexperia B.V.
The 74HC4040; 74HCT4040 is a 12-stage binary ripple counter with a clock input (CP), an overriding asynchronous master reset input (MR) and twelve parallel outputs (Q0 to Q11). The counter advances on the HIGH-to-LOW transition of CP. A HIGH on MR clears all counter stages and forces all outputs... [See More]
- Logic Family: TTL; TTL
- Supply Voltage: 5V; 4.5 - 5.5
- Counter Category: Asynchronous
- Package Type: SO16 (SOT109-1)
from RS Components, Ltd.
Dual 4b decade & binarycounter,SN74LS393N [See More]
- Logic Family: Ls
- Supply Voltage: 5.25 v, 4.75 v
- Counter Type: Binary
- Package Type: DIP; Pdip
from Texas Instruments
Synchronous 4-Bit Up/Down Counters (Dual Clock With Clear) 16-CDIP -55 to 125 [See More]
- Logic Family: TTL; TTL
- Counter Direction: Bidirectional
- Counter Category: Synchronous
- Package Type: CDIP,CFP
from Rochester Electronics
54196 - Decade Counter, Asynchronous, Up Direction, TTL [See More]
- Logic Family: TTL
- Counter Direction: UP
- Counter Category: Synchronous; Asynchronous
- Package Type: CFP
from Nexperia B.V.
The 74HC4040; 74HCT4040 is a 12-stage binary ripple counter with a clock input (CP), an overriding asynchronous master reset input (MR) and twelve parallel outputs (Q0 to Q11). The counter advances on the HIGH-to-LOW transition of CP. A HIGH on MR clears all counter stages and forces all outputs... [See More]
- Logic Family: TTL; TTL
- Supply Voltage: 5V; 4.5 - 5.5
- Counter Category: Asynchronous
- Package Type: SOT403-1
from RS Components, Ltd.
8-bit SIPO shift register,SN74LS164N [See More]
- Logic Family: Ls
- Package Type: DIP; Pdip
- Supply Voltage: 5.25 v, 4.75 v
- Number of Pins: 14
from Texas Instruments
50/30/100-Mhz Presettable Decade OR Binary Counters/Latches 14-CDIP -55 to 125 [See More]
- Logic Family: TTL; TTL
- Package Type: CDIP
- Counter Type: BCD/Decade Counter
- Operating Temperature: -55 to 125
from Rochester Electronics
Binary Counter, ALS Series, Synchronous, Positive Edge Triggered, 4-Bit, Up Direction, TTL, CDIP16 [See More]
- Logic Family: TTL
- Counter Direction: UP
- Counter Category: Synchronous
- Package Type: DIP; CDIP16
from Nexperia B.V.
The 74HC393; 74HCT393 is a dual 4-stage binary ripple counter. Each counter features a clock input (nCP), an overriding asynchronous master reset input (nMR) and 4 buffered parallel outputs (nQ0 to nQ3). The counter advances on the HIGH-to-LOW transition of nCP. A HIGH on nMR clears the counter... [See More]
- Logic Family: TTL; TTL
- Supply Voltage: 5V; 4.5 - 5.5
- Counter Category: Asynchronous
- Package Type: SOT762-1
from RS Components, Ltd.
Shift Register 8-Bit Serial/Parallel [See More]
- Logic Family: Ls
- Package Type: DIP; Pdip
- Supply Voltage: 5.25 v, 4.75 v
- Number of Pins: 16
from Texas Instruments
50/30/100-Mhz Presettable Decade OR Binary Counters/Latches 14-CDIP -55 to 125 [See More]
- Logic Family: TTL; TTL
- Package Type: CDIP
- Counter Type: BCD/Decade Counter
- Operating Temperature: -55 to 125
from Rochester Electronics
Binary Counter, LS Series, Synchronous, Positive Edge Triggered, 4-Bit, Up Direction, TTL, CDFP16 [See More]
- Logic Family: TTL
- Counter Direction: UP
- Counter Category: Synchronous
- Package Type: FL16
from Nexperia B.V.
The 74HC393; 74HCT393 is a dual 4-stage binary ripple counter. Each counter features a clock input (nCP), an overriding asynchronous master reset input (nMR) and 4 buffered parallel outputs (nQ0 to nQ3). The counter advances on the HIGH-to-LOW transition of nCP. A HIGH on nMR clears the counter... [See More]
- Logic Family: TTL; TTL
- Supply Voltage: 5V; 4.5 - 5.5
- Counter Category: Asynchronous
- Package Type: SOT108-1
from RS Components, Ltd.
Shift Register Single, CD74HC595M96 [See More]
- Logic Family:
from Rochester Electronics
MICROCIRCUIT, DIGITAL, HS CMOS,PROGRAMMABLE DIVIDE-BY-N COUNTER, TTL COMPATIBLE INPUTS, MONOLITHIC SILICON [See More]
- Logic Family: TTL; CMOS
from Nexperia B.V.
The 74HC393; 74HCT393 is a dual 4-stage binary ripple counter. Each counter features a clock input (nCP), an overriding asynchronous master reset input (nMR) and 4 buffered parallel outputs (nQ0 to nQ3). The counter advances on the HIGH-to-LOW transition of nCP. A HIGH on nMR clears the counter... [See More]
- Logic Family: TTL; TTL
- Supply Voltage: 5V; 4.5 - 5.5
- Counter Category: Asynchronous
- Package Type: SOT402-1
from RS Components, Ltd.
Shift Register Single, CD74HC595M96 [See More]
- Logic Family:
from Rochester Electronics
Binary Counter, AS Series, Synchronous, Positive Edge Triggered, 8-Bit, Bidirectional, TTL, CDFP24 [See More]
- Logic Family: TTL
- Counter Direction: Bidirectional
- Counter Category: Synchronous
- Package Type: FL24
from RS Components, Ltd.
Shift Register Single, SN74HC594N [See More]
- Logic Family:
from Rochester Electronics
Binary Counter, AS Series, Synchronous, Positive Edge Triggered, 8-Bit, Bidirectional, TTL, CDIP24 [See More]
- Logic Family: TTL
- Counter Direction: Bidirectional
- Counter Category: Synchronous
- Package Type: DIP; CDIP24
from RS Components, Ltd.
Shift Register Single, SN74HC594N [See More]
- Logic Family:
from Rochester Electronics
Binary Counter, TTL/H/L Series, Synchronous, Positive Edge Triggered, 4-Bit, Bidirectional, TTL, PDIP16 [See More]
- Logic Family: TTL
- Counter Direction: Bidirectional
- Counter Category: Synchronous
- Package Type: DIP; DIP16
from RS Components, Ltd.
Counter/Divider Single 4-Bit Decade UP [See More]
- Logic Family: Ls
- Supply Voltage: 5.25 v, 4.75 v
- Counter Type: BCD/Decade Counter
- Package Type: DIP; Pdip
from Rochester Electronics
Decade Counter, F/FAST Series, Synchronous, Positive Edge Triggered, 4-Bit, Up Direction, TTL, PDSO16 [See More]
- Logic Family: TTL
- Counter Direction: UP
- Counter Category: Synchronous
- Package Type: SOP; SOP16
from Rochester Electronics
Binary Counter, F/FAST Series, Synchronous, Positive Edge Triggered, 4-Bit, Bidirectional, TTL, PDSO16 [See More]
- Logic Family: TTL
- Counter Direction: Bidirectional
- Counter Category: Synchronous
- Package Type: SOIC; SOIC16
from Rochester Electronics
74F269 - Binary Counter, F/FAST Series, Synchronous, Positive Edge Triggered, 8-Bit, Bidirectional, TTL, PDIP24 [See More]
- Logic Family: TTL
- Counter Direction: Bidirectional
- Counter Category: Synchronous
- Package Type: DIP; PDIP; PDIP
from Rochester Electronics
Binary Counter, F/FAST Series, Synchronous, Positive Edge Triggered, 4-Bit, Bidirectional, TTL, PDSO20 [See More]
- Logic Family: TTL
- Counter Direction: Bidirectional
- Counter Category: Synchronous
- Package Type: SOP; SOP20
from Rochester Electronics
Decade Counter, Synchronous, Up Direction, TTL, PDIP16 [See More]
- Logic Family: TTL
- Counter Direction: UP
- Counter Category: Synchronous
- Package Type: DIP; PDIP; PDIP16
from Rochester Electronics
Binary Counter, ALS Series, Synchronous, Positive Edge Triggered, 4-Bit, Bidirectional, TTL, CDIP20 [See More]
- Logic Family: TTL
- Counter Direction: Bidirectional
- Counter Category: Synchronous
- Package Type: DIP; CDIP20
from Rochester Electronics
Binary Counter, LS Series, Synchronous, Positive Edge Triggered, 4-Bit, Bidirectional, TTL, CDIP20 [See More]
- Logic Family: TTL
- Counter Direction: Bidirectional
- Counter Category: Synchronous
- Package Type: DIP; DIP20
from Rochester Electronics
Binary Counter, LS Series, Asynchronous, Negative Edge Triggered, 4-Bit, Up Direction, TTL, PDSO14 [See More]
- Logic Family: TTL
- Counter Direction: UP
- Counter Category: Synchronous; Asynchronous
- Package Type: SOP; SOP14
from Rochester Electronics
Binary Counter, LS Series, Asynchronous, Negative Edge Triggered, 4-Bit, Up Direction, TTL, PDSO14 [See More]
- Logic Family: TTL
- Counter Direction: UP
- Counter Category: Synchronous; Asynchronous
- Package Type: PDSO14
from Rochester Electronics
Binary Counter, LS Series, Asynchronous, Negative Edge Triggered, 4-Bit, Up Direction, TTL, PDIP14 [See More]
- Logic Family: TTL
- Counter Direction: UP
- Counter Category: Synchronous; Asynchronous
- Package Type: DIP; PDIP; PDIP14
from Rochester Electronics
Decade Counter, LS Series, Synchronous, Positive Edge Triggered, 4-Bit, Up Direction, TTL, CQCC20 [See More]
- Logic Family: TTL
- Counter Direction: UP
- Counter Category: Synchronous
- Package Type: LCC20
from Rochester Electronics
Decade Counter, TTL [See More]
- Logic Family: TTL
- Package Type: DIP; DIP
from Rochester Electronics
Binary Counter, ALS Series, Synchronous, Positive Edge Triggered, 8-Bit, Bidirectional, TTL, PDSO24 [See More]
- Logic Family: TTL
- Counter Direction: Bidirectional
- Counter Category: Synchronous
- Package Type: SOIC; SOIC24
from Rochester Electronics
Binary Counter, ALS Series, Synchronous, Positive Edge Triggered, 8-Bit, Bidirectional, TTL, PDSO24 [See More]
- Logic Family: TTL
- Counter Direction: Bidirectional
- Counter Category: Synchronous
- Package Type: SOP; SOP24
from Rochester Electronics
Binary Counter, LS Series, Asynchronous, Negative Edge Triggered, 3-Bit, Up Direction, TTL, PDSO14 [See More]
- Logic Family: TTL
- Counter Direction: UP
- Counter Category: Synchronous; Asynchronous
- Package Type: SOIC; SOIC14
from Rochester Electronics
Binary Counter, Synchronous, Bidirectional, TTL, PQCC28 [See More]
- Logic Family: TTL
- Counter Direction: Bidirectional
- Counter Category: Synchronous
- Package Type: DIP; PDIP; PDIP28
from Rochester Electronics
Binary Counter, LS Series, Synchronous, Positive Edge Triggered, 4-Bit, Bidirectional, TTL, PDIP20 [See More]
- Logic Family: TTL
- Counter Direction: Bidirectional
- Counter Category: Synchronous
- Package Type: DIP; PDIP; PDIP20
from Lansdale Semiconductor, Inc.
The 54S00/74S00 series of product is fabricated with a non-saturating Schottky clamped transistor technique. This family of TTL product consists of very high performance and high power devices. [See More]
- Logic Family: TTL
- Counter Direction: Bidirectional
- Counter Category: Synchronous
- Supply Voltage: 7 V
from Utmel Electronic Limited
Counter Single 4-Bit Sync Binary UP 16-Pin SOIC T/R [See More]
- Logic Family: TTL; TTL
- Counter Direction: UP
- Counter Category: Synchronous
- Supply Voltage: 5V; 5V
from Utmel Electronic Limited
Counter Single 4-Bit Sync Binary UP/Down 16-Pin CDIP Tube [See More]
- Logic Family: TTL; TTL
- Counter Direction: DOWN
- Counter Category: Synchronous
- Supply Voltage: 5V; 5V
from Utmel Electronic Limited
Counter/Divider Dual 4-Bit Binary UP 14-Pin CFPAK Tube [See More]
- Logic Family: TTL; TTL
- Counter Direction: UP
- Counter Category: Synchronous
- Supply Voltage: 5V; 5V
from Utmel Electronic Limited
Counter/Divider Dual 4-Bit Binary UP 14-Pin SOP T/R [See More]
- Logic Family: TTL; TTL
- Counter Direction: UP
- Counter Category: Synchronous
- Supply Voltage: 5V; 5V
from Utmel Electronic Limited
IC COUNTER BIN 4BIT U/D 16SO [See More]
- Logic Family: TTL; TTL
- Supply Voltage: 5V; 5V
- Counter Category: Synchronous
- Package Type: SOIC; 16-SOIC (0.209, 5.30mm Width)
from Utmel Electronic Limited
IC, 8BIT BINARY COUNTER, DIP-16 - More Details [See More]
- Logic Family: TTL; TTL
- Supply Voltage: 5V; 5V
- Counter Category: Synchronous
- Package Type: DIP; 16-DIP (0.300, 7.62mm)
from Utmel Electronic Limited
TEXAS INSTRUMENTS SN74LS293NLOGIC, COUNTER BINARY 4BIT, 14DIP [See More]
- Logic Family: TTL; TTL
- Supply Voltage: 5V; 5V
- Counter Category: Synchronous
- Package Type: DIP; 14-DIP (0.300, 7.62mm)