Logic - Parity Generators and Checkers

Part Number	Description / PDF	Quantity
SN350263DR Texas Instruments	9-BIT PARITY GENERATOR/CH	0
MC74F280MEL	PARITY GEN.	0
COM8116T-013ACD Fluke Electronics	BAUD RATE GENERATOR	0
CD40182BCN	CMOS LOOK-AHEAD CARRY GENERATOR	0
SC65895PK280	LOG TTL PARITY CHCK 9BIT	5375
COM8116-6TMCP Fluke Electronics	BAUD RATE GENERATOR	0
COM5016HR Fluke Electronics	DUAL BAUD RATE GENERATOR/PROGRAM	0
COM8116T-013CD Fluke Electronics	BAUD RATE GENERATOR	0
COM8136T-027CD Fluke Electronics	DUAL BAUD RATE GENERATOR	0
54S62FM	54S62 - 9-INPUT PARITY CHECKER/G	102
RO-3-2513 Roving Networks / Microchip Technology	CHARACTER GENERATOR	1171
54F280/BCA Rochester Electronics	DUAL MARKED (M38510/34901BCA)	311
COM8116T-016P Fluke Electronics	BAUD RATE GENERATOR	0
COM8116T-013P Fluke Electronics	BAUD RATE GENERATOR	0
CRT8002-018HR Fluke Electronics	CRT VIDEO ATTRIBUTES CONTROLLER	0
AD9937KCP Analog Devices, Inc.	CCD SIGNAL PROCESSOR W/PRECISION	2424
AY-5-8116-003 Roving Networks / Microchip Technology	DUAL BAUD RATE GENERATOR	0
CRT8002A-034P Fluke Electronics	CRT VIDEO ATTRIBUTES CONTROLLER	0
54F280/B2A Rochester Electronics	DUAL MARKED (M38510/34901B2A)	805
COM5016BICD Fluke Electronics	DUAL BAUD RATE GENERATOR/PROGRAM	0

Logic - Parity Generators and Checkers

1. Overview

Parity generators and checkers are digital logic ICs used to detect errors in data transmission or storage systems. These circuits generate a parity bit (even or odd) during data transmission and verify the parity at the receiver end to ensure data integrity. They play a critical role in applications requiring error detection, such as communication systems, memory modules, and industrial automation. By adding redundancy through parity bits, these ICs help identify single-bit errors, enhancing system reliability.

2. Main Types and Functional Classification

Type	Functional Features	Application Examples
Even/Odd Parity Generator	Generates a parity bit to ensure even or odd number of 1s in data	Serial communication protocols (RS-232)
Parity Checker	Verifies received data against transmitted parity bit	RAM error detection systems
Multifunction Parity IC	Supports both generation and checking in a single chip	Networking hardware (Ethernet switches)
High-Speed Parity IC	Optimized for GHz-range data transmission	Fiber optic communication systems

3. Structure and Composition

These ICs typically consist of XOR/XNOR logic gates arranged in combinatorial circuits. Key components include:

Input buffers for data signal conditioning
Parity computation logic (tree-based XOR structures)
Control pins for parity mode selection (even/odd)
Output drivers for parity bit transmission
Standard packages: TSSOP, QFN, or BGA with 14-100 pins

4. Key Technical Specifications

Parameter	Typical Value	Importance
Operating Voltage	1.8V - 5.5V	Ensures compatibility with system logic levels
Propagation Delay	3 - 20 ns	Determines maximum data rate support
Power Consumption	10 - 100 mW	Impacts thermal design and efficiency
Parity Bit Width	4/8/16 bits	Defines data bus compatibility
Operating Temperature	-40 C to +125 C	Critical for industrial/environmental reliability

5. Application Fields

Telecommunications: 5G base stations, satellite modems
Computer Systems: ECC memory controllers, RAID storage arrays
Industrial Automation: PLC data integrity verification
Consumer Electronics: Smartcard readers, IoT wireless modules

Case Study: In DDR4 memory systems, parity checkers validate address/command lines at 3200MT/s data rates.

6. Leading Manufacturers and Products

Manufacturer	Representative Product	Key Features
TI (Texas Instruments)	SN74LVC1G18	Single-bit parity generator with 2ns delay
NXP Semiconductors	74FCT273T	Octal parity checker for SCSI interfaces
Intel	PAT16G44	16-bit parity engine for Xeon processors
AMD	Am7960	Integrated parity solution for network switches

7. Selection Guidelines

Data Bus Width: Match IC parity width to system data path (e.g., 8-bit for UART)
Speed Requirements: Propagation delay must satisfy Nyquist criteria for clock rate
Power Budget: Low-power variants (e.g., CMOS) for battery-operated devices
Environmental Factors: Automotive-grade parts (-40 C to +150 C) for vehicle systems
Cost vs. Integration: Multifunction ICs reduce PCB space but may increase BOM cost

8. Industry Trends

Future developments include:

Integration with advanced error correction (SEC-DED) in 3D-stacked memory
Support for emerging 112Gbps+ SerDes interfaces
AI-driven parity optimization in data centers
Photonics-compatible parity circuits for optical computing

Market demand grows at 6.2% CAGR (2023-2030), driven by autonomous vehicle safety systems and 6G infrastructure.