Logic - Parity Generators and Checkers

Category Introduction

Devices in the parity generator and checker logic family are component-level devices used to evaluate the number of bits in a digital word that are set to 1, and generate (or evaluate) an additional parity bit which indicates whether the number of bits in the word set to 1 is even or odd. This function is commonly used as a simple means of detecting data errors that may have been introduced during transmission.

Product List

291 Items
PDF Mfr Part # Quantity
Available
UnitPrice RFQ Series Packaging Product StatusLogic TypeNumber of CircuitsCurrent - Output High, LowVoltage - SupplyOperating TemperatureMounting TypePackage / CaseSupplier Device Package
74HCT280D,653
74HCT280D,653
IC PARITY GEN/CHKER 9-BIT 14SO
Nexperia USA Inc.
1,034 $0.90
74HCT Tape & Reel (TR) ActiveParity Generator/Checker9-Bit-4.5 V ~ 5.5 V-Surface Mount14-SOIC (0.154", 3.90mm Width)14-SO
74HCT280D,652
74HCT280D,652
IC PARITY GEN/CHKER 9-BIT 14SO
Nexperia USA Inc.
415 $0.00
74HCT Bulk ObsoleteParity Generator/Checker9-Bit-4.5 V ~ 5.5 V-Surface Mount14-SOIC (0.154", 3.90mm Width)14-SO
SN74F280BD
SN74F280BD
IC PARITY GEN/CHKER 9-BIT 14SOIC
Texas Instruments
223 $1.33
74F Tube ActiveParity Generator/Checker9-Bit1mA, 20mA4.5 V ~ 5.5 V0°C ~ 70°CSurface Mount14-SOIC (0.154", 3.90mm Width)14-SOIC
SN74AS280N
SN74AS280N
IC PARITY GEN/CHKER 9-BIT 14DIP
Texas Instruments
130 $4.30
74AS Tube ActiveParity Generator/Checker9-Bit2mA, 20mA4.5 V ~ 5.5 V0°C ~ 70°CThrough Hole14-DIP (0.300", 7.62mm)14-PDIP
MC74F280DR2
MC74F280DR2
PARITY GENERATOR/CHECKER 9 BIT 1
onsemi
221 $0.12
74F Bulk ActiveParity Generator/Checker91mA, 20mA4.5 V ~ 5.5 V0°C ~ 70°CSurface Mount14-SOIC (0.154", 3.90mm Width)14-SOIC
MC74F280D
MC74F280D
PARITY GENERATOR/CHECKER 9 BIT 1
onsemi
3,589 $0.12
Bulk Active--------
MC74F280N
MC74F280N
PARITY GENERATOR/CHECKER, F/FAST
onsemi
6,288 $0.15
Bulk Active--------
74AC280SC
74AC280SC
IC PARITY GEN/CHKER 9-BIT 14SOIC
Fairchild Semiconductor
229 $0.18
74AC Tube ObsoleteParity Generator/Checker9-Bit24mA, 24mA2 V ~ 6 V-40°C ~ 85°CSurface Mount14-SOIC (0.154", 3.90mm Width)14-SOIC
SC65895PK280
SC65895PK280
LOG TTL PARITY CHCK 9BIT
onsemi
1,618 $0.18
Bulk Active--------
74AC280SCX
74AC280SCX
IC PARITY GEN/CHKER 9-BIT 14SOIC
Fairchild Semiconductor
894 $0.18
74AC Bulk ObsoleteParity Generator/Checker9-Bit24mA, 24mA2 V ~ 6 V-40°C ~ 85°CSurface Mount14-SOIC (0.154", 3.90mm Width)14-SOIC
74HC280D/S400118
74HC280D/S400118
PARITY GENERATOR/CHECKER, 9-BIT
NXP USA Inc.
2,287 $0.19
Bulk Active--------
74F280SC
74F280SC
PARITY GENERATOR/CHECKER, F/FAST
National Semiconductor
3,665 $0.22
74F Bulk ActiveParity Generator/Checker91mA, 20mA4.5 V ~ 5.5 V0°C ~ 70°CSurface Mount14-SOIC (0.154", 3.90mm Width)14-SOIC
74F280SCX
74F280SCX
IC PARITY GEN/CHKER 9-BIT 14SOIC
Fairchild Semiconductor
1,680 $0.24
74F Bulk ObsoleteParity Generator/Checker9-Bit1mA, 20mA4.5 V ~ 5.5 V0°C ~ 70°CSurface Mount14-SOIC (0.154", 3.90mm Width)14-SOIC
MC74F182N
MC74F182N
LOOK-AHEAD CARRY GENERATOR, F/FA
onsemi
1,610 $0.25
Bulk Active--------
MC10160P
MC10160P
PARITY GENERATOR/CHECKER, 12-BIT
onsemi
59 $0.27
Bulk Active--------
74F280SJ
74F280SJ
IC PARITY GEN/CHKER 9-BIT 14SOP
Fairchild Semiconductor
2,257 $0.29
74F Tube ObsoleteParity Generator/Checker9-Bit1mA, 20mA4.5 V ~ 5.5 V0°C ~ 70°CSurface Mount14-SOIC (0.209", 5.30mm Width)14-SOP
CD74HCT280E
CD74HCT280E
IC PARITY GEN/CHKER 9-BIT 14DIP
Harris Corporation
2,108 $0.34
74HCT Tube ObsoleteParity Generator/Checker9-Bit4mA, 4mA4.5 V ~ 5.5 V-55°C ~ 125°CThrough Hole14-DIP (0.300", 7.62mm)14-PDIP
DM74AS280MX
DM74AS280MX
IC PARITY GEN/CHKER 9-BIT 14SOIC
Fairchild Semiconductor
1,183 $0.44
74AS Bulk ObsoleteParity Generator/Checker9-Bit2mA, 20mA4.5 V ~ 5.5 V0°C ~ 70°CSurface Mount14-SOIC (0.154", 3.90mm Width)14-SOIC
DM74S280N
DM74S280N
IC PARITY GEN/CHKER 3 14DIP
Fairchild Semiconductor
987 $0.44
74S Tube ObsoleteParity Generator/Checker31mA, 20mA4.75 V ~ 5.25 V0°C ~ 70°CThrough Hole14-DIP (0.300", 7.62mm)14-DIP
CD74HC280E
CD74HC280E
IC PARITY GEN/CHKER 9-BIT 14DIP
Harris Corporation
1,182 $0.46
74HC Tube ObsoleteParity Generator/Checker9-Bit5.2mA, 5.2mA2 V ~ 6 V-55°C ~ 125°CThrough Hole14-DIP (0.300", 7.62mm)14-PDIP

About Parity Generators & Parity Checkers

What are Parity Generators & Parity Checkers?

Parity Generators

Parity generators are digital logic circuits designed to generate a parity bit for a given set of binary data. The primary function of a parity generator is to ensure data integrity by adding an extra bit, known as the parity bit, to a data word. This bit is used to indicate whether the number of 1s in the data is odd or even, thus enabling error detection during data transmission. The basic operating principle involves using XOR (exclusive OR) gates to calculate the parity bit, ensuring that the total number of 1s in the data, including the parity bit, is either even (even parity) or odd (odd parity).

Parity Checkers

Parity checkers are essential components in digital logic circuits, designed to detect errors in data transmission and storage. They operate by verifying the parity bit, an additional bit added to a set of binary data to ensure that the total number of 1-bits is even (even parity) or odd (odd parity). The basic principle involves comparing the calculated parity of received data with the expected parity. If a mismatch is detected, it indicates a potential error, prompting further error correction measures. Parity checkers are fundamental in maintaining data integrity across various digital systems.

Types of Parity Generators

1. Even Parity Generators

Even parity generators are designed to produce a parity bit that makes the total number of 1s in the data word even. These generators are commonly used in communication systems where even parity is preferred for error detection. The even parity generator uses XOR gates to ensure that the sum of the data bits and the parity bit results in an even number.

2. Odd Parity Generators

Odd parity generators, on the other hand, produce a parity bit that results in an odd number of 1s in the data word. This type of generator is used in scenarios where odd parity is required for error detection. Similar to even parity generators, odd parity generators utilize XOR gates to achieve the desired parity condition.

3. Programmable Parity Generators

Programmable parity generators offer flexibility by allowing users to configure the type of parity (even or odd) based on specific requirements. These generators are ideal for systems that need to switch between different parity modes or for applications that require custom parity configurations.

Types of Parity Checkers

1. Even Parity Checkers

Even parity checkers ensure that the total number of 1-bits in a data set, including the parity bit, is even. They are widely used in systems where even parity is the standard for error detection. These checkers are straightforward to implement and are often found in simple communication protocols and memory systems.

2. Odd Parity Checkers

Odd parity checkers, conversely, ensure that the total number of 1-bits is odd. They are used in systems where odd parity is preferred, providing an alternative method for error detection. Odd parity checkers are particularly useful in environments where even parity might be more susceptible to specific types of errors.

3. Dual Parity Checkers

Dual parity checkers are versatile components capable of handling both even and odd parity checks. They are ideal for systems that require flexibility in error detection methods, allowing for dynamic switching between parity modes based on the application's needs.

How to choose Parity Generators?

When selecting a parity generator, several key parameters should be considered:

  • Parity Type: Determine whether even, odd, or programmable parity is required for your application.
  • Data Width: Ensure the generator supports the data width of your system, as different generators handle varying numbers of input bits.
  • Speed: Consider the operating speed and ensure it aligns with the data transmission rates of your system.
  • Power Consumption: Evaluate the power requirements, especially for battery-operated or energy-sensitive applications.
  • Supplier Reputation: Assess the reliability and quality of different suppliers by reviewing product specifications, customer reviews, and industry certifications.
  • Environmental Factors: Consider the operating temperature range and environmental conditions where the generator will be used.
  • Installation Requirements: Ensure compatibility with existing systems and evaluate the ease of integration and installation.

How to choose Parity Checkers?

When selecting parity checkers, several key parameters should be considered:

  • Compatibility: Ensure the checker is compatible with the data format and communication protocol used in your system.
  • Speed: Consider the data processing speed required, as some applications may demand high-speed error detection.
  • Power Consumption: Evaluate the power efficiency, especially in battery-operated or low-power devices.
  • Reliability: Assess the product quality and reliability by reviewing supplier certifications, customer reviews, and testing standards.
  • Environmental Factors: Consider the operating environment, such as temperature and humidity, to ensure the checker can withstand specific conditions.

Installation requirements should also be considered, ensuring that the parity checker can be easily integrated into existing systems without extensive modifications.

Applications of Parity Generators & Parity Checkers

Parity Generators and Parity Checkers are essential components in the realm of digital electronics, particularly in ensuring data integrity during transmission and storage. These integrated circuits (ICs) play a pivotal role in detecting errors in binary data streams by adding or checking parity bits. Their applications span across various industries, each leveraging their capabilities to maintain data accuracy and reliability.

Applications of Parity Generators & Parity Checkers

1. Telecommunications

In the telecommunications industry, parity generators and checkers are crucial for error detection in data transmission over networks. They are used in modems and routers to ensure that data packets sent over long distances remain intact. By generating parity bits before transmission and checking them upon receipt, these devices help in identifying and correcting single-bit errors, thereby enhancing the reliability of communication systems.

2. Data Storage Systems

Data storage systems, including hard drives and SSDs, utilize parity generators and checkers to maintain data integrity. When data is written to storage, parity bits are generated and stored alongside the data. During read operations, parity checkers verify the data's integrity, ensuring that any errors introduced during storage or retrieval are detected and corrected, thus safeguarding critical information.

3. Computer Systems

In computer systems, parity generators and checkers are often found in memory modules, such as RAM. They play a vital role in error detection and correction, ensuring that the data processed by the CPU is accurate. This is particularly important in mission-critical applications, where data corruption could lead to system failures or incorrect computations.

4. Aerospace and Defense

The aerospace and defense sectors rely heavily on parity generators and checkers for secure and reliable data communication. In avionics systems, these components help in maintaining the integrity of navigation and control data. Similarly, in defense applications, they ensure that encrypted communications remain error-free, which is crucial for operational security and effectiveness.

5. Industrial Automation

In industrial automation, parity generators and checkers are used in programmable logic controllers (PLCs) and other control systems to ensure the accuracy of data exchanged between sensors, actuators, and control units. By detecting and correcting errors in real-time, these components help in maintaining the smooth operation of automated processes, reducing downtime and increasing productivity.

Overall, parity generators and checkers are indispensable in any application where data integrity is paramount. Their ability to detect and correct errors ensures that digital systems operate reliably and efficiently across a wide range of industries.