KS8721BA4

Product Overview

Category

KS8721BA4 belongs to the category of Ethernet Physical Layer Transceivers.

Use

It is primarily used for Ethernet communication applications, providing a physical interface between the Ethernet MAC (Media Access Control) layer and the Ethernet PHY (Physical Layer).

Characteristics

• Supports 10/100 Mbps data rates
• Compliant with IEEE 802.3 standards
• Low power consumption
• Small form factor
• Robust performance in harsh environments

Package

KS8721BA4 is available in a compact package, suitable for surface mount technology (SMT) assembly.

Essence

The essence of KS8721BA4 lies in its ability to facilitate reliable and efficient Ethernet communication by converting digital signals from the MAC layer into analog signals for transmission over the physical medium.

Packaging/Quantity

KS8721BA4 is typically packaged in reels or trays, with varying quantities depending on the manufacturer's specifications.

Specifications

• Data Rates: 10/100 Mbps
• Supply Voltage: 3.3V
• Operating Temperature Range: -40°C to +85°C
• Interface: MII (Media Independent Interface)
• ESD Protection: ±8kV HBM (Human Body Model)

Detailed Pin Configuration

The KS8721BA4 features a standard pin configuration for an Ethernet PHY transceiver. The following table provides a detailed overview of the pin assignments:

| Pin Number | Pin Name | Description | |------------|----------|-------------| | 1 | VDDA | Analog Power Supply | | 2 | VSSA | Analog Ground | | 3 | VDD | Digital Power Supply | | 4 | VSS | Digital Ground | | 5 | TXEN | Transmit Enable | | 6 | TXD0 | Transmit Data Bit 0 | | 7 | TXD1 | Transmit Data Bit 1 | | 8 | TXCLK | Transmit Clock | | 9 | CRSDV | Carrier Sense/Data Valid | | 10 | RXD0 | Receive Data Bit 0 | | 11 | RXD1 | Receive Data Bit 1 | | 12 | RXER | Receive Error | | 13 | RXCLK | Receive Clock | | 14 | MDC | Management Data Clock | | 15 | MDIO | Management Data I/O | | 16 | VDDO | Output Power Supply | | 17 | VSSO | Output Ground |

Functional Features

• Auto-negotiation: KS8721BA4 supports auto-negotiation, allowing it to automatically determine the best possible data rate and duplex mode for communication.
• LinkMD®+: This feature enables advanced cable diagnostics, including cable length measurement and fault detection.
• Energy Efficient Ethernet (EEE): KS8721BA4 incorporates EEE technology, reducing power consumption during periods of low network activity.

Advantages and Disadvantages

Advantages

• High compatibility with various Ethernet MACs and PHYs
• Robust performance in harsh environments
• Low power consumption
• Advanced cable diagnostics

Disadvantages

• Limited to 10/100 Mbps data rates, not suitable for Gigabit Ethernet applications
• Lack of support for advanced features like Power over Ethernet (PoE)

Working Principles

KS8721BA4 operates by receiving digital signals from the MAC layer and converting them into analog signals suitable for transmission over the physical medium. It also receives analog signals from the physical medium and converts them back into digital signals for the MAC layer.

Detailed Application Field Plans

KS8721BA4 finds applications in various Ethernet communication systems, including: - Industrial automation - Home networking - Automotive electronics - Telecommunications equipment - Internet of Things (IoT) devices

Detailed and Complete Alternative Models

Some alternative models to KS8721BA4 include: - KSZ8081RNB - DP83848CVV - LAN8720A

These models offer similar functionality and can be considered as alternatives based on specific requirements.

In conclusion, KS8721BA4 is a versatile Ethernet Physical Layer Transceiver that provides reliable and efficient Ethernet communication. With its compact size, low power consumption, and robust performance, it is suitable for a wide range of applications in various industries.