SN74AS286DRE4

Product Overview

• Category: Integrated Circuit (IC)
• Use: Logic Function
• Characteristics: High-speed, Low-power, 9-bit Parity Generator/Checker
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: Performs parity generation and checking for data integrity
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 4.5V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Input Current: ±10mA
• Output Current: ±20mA
• Propagation Delay Time: 7ns (typical)
• Power Dissipation: 500mW (max)

Detailed Pin Configuration

The SN74AS286DRE4 has a total of 14 pins:

1. GND (Ground)
2. A0 (Input A0)
3. A1 (Input A1)
4. A2 (Input A2)
5. A3 (Input A3)
6. A4 (Input A4)
7. A5 (Input A5)
8. A6 (Input A6)
9. A7 (Input A7)
10. A8 (Input A8)
11. P (Parity Output)
12. C (Carry Output)
13. G2 (Enable Input)
14. VCC (Supply Voltage)

Functional Features

• Generates odd or even parity bit based on the input data
• Checks the parity of the input data and provides an output indicating whether the parity is correct or not
• Supports 9-bit data width
• Provides a carry output for cascading multiple devices
• High-speed operation with low power consumption

Advantages and Disadvantages

Advantages: - Fast propagation delay time allows for high-speed data processing - Low power consumption makes it suitable for battery-powered devices - Compact SOIC package enables space-efficient designs - Easy to use and integrate into existing logic circuits

Disadvantages: - Limited to 9-bit data width, may not be suitable for applications requiring larger data sizes - Requires external enable signal (G2) for operation, adding complexity to the circuit design

Working Principles

The SN74AS286DRE4 operates based on the principles of parity generation and checking. When used as a parity generator, it takes the input data bits and generates an additional parity bit (P) based on whether the number of ones in the data is odd or even. This helps in detecting errors during data transmission.

As a parity checker, the IC compares the received data with the parity bit provided. If the number of ones in the data does not match the expected parity, an error is indicated through the carry output (C). This allows for data integrity verification.

Detailed Application Field Plans

The SN74AS286DRE4 can be used in various applications where data integrity is crucial. Some potential application fields include:

1. Communication Systems: Ensuring error-free data transmission in protocols such as UART, SPI, or I2C.
2. Memory Systems: Verifying data integrity in RAM, ROM, or flash memory modules.
3. Data Storage: Checking parity in hard drives, solid-state drives, or optical storage devices.
4. Network Equipment: Detecting errors in Ethernet switches, routers, or network interface cards.
5. Industrial Control Systems: Maintaining data integrity in PLCs, SCADA systems, or industrial automation devices.

Detailed and Complete Alternative Models

1. SN74LS280: 9-bit Parity Generator/Checker with similar specifications and functionality.
2. SN74HC280: High-Speed CMOS Logic 9-bit Parity Generator/Checker with improved power efficiency.
3. SN74LVC1G80: Single Bit Parity Generator/Checker for low-power applications.

These alternative models offer similar features and can be considered based on specific requirements and compatibility with existing designs.

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