KS8721BA4-TR

Product Overview

Category

The KS8721BA4-TR belongs to the category of Ethernet Physical Layer Transceivers.

Use

This product is primarily used for Ethernet communication applications, providing a physical interface between an Ethernet controller and an Ethernet cable.

Characteristics

• Supports 10/100 Mbps data rates
• Compliant with IEEE 802.3 standards
• Low power consumption
• Small form factor
• RoHS compliant

Package

The KS8721BA4-TR is available in a small package, typically measuring 5mm x 5mm. It is designed for surface mount technology (SMT) assembly.

Essence

The essence of the KS8721BA4-TR lies in its ability to enable reliable and high-speed Ethernet communication by converting digital signals from the Ethernet controller into analog signals suitable for transmission over Ethernet cables.

Packaging/Quantity

The KS8721BA4-TR is commonly packaged in reels or trays, with quantities varying depending on customer requirements. Typical packaging options include tape and reel packaging with 2,500 units per reel.

Specifications

• Supply Voltage: 3.3V
• Operating Temperature Range: -40°C to +85°C
• Data Rate: 10/100 Mbps
• Interface: MII (Media Independent Interface)
• Package Type: 32-pin QFN (Quad Flat No-Lead)

Detailed Pin Configuration

The KS8721BA4-TR features a 32-pin QFN package with the following pin configuration:

1. VDDA
2. VSSA
3. VDDIO
4. VSSIO
5. TX_CLK
6. TX_EN
7. TXD[0]
8. TXD[1]
9. TXD[2]
10. TXD[3]
11. TX_ER
12. CRS
13. RX_CLK
14. RX_DV
15. RXD[0]
16. RXD[1]
17. RXD[2]
18. RXD[3]
19. RX_ER
20. COL
21. MDC
22. MDIO
23. VDDPLL
24. VSSPLL
25. REFCLK
26. VDDXTAL
27. VSSXTAL
28. XTAL_OUT
29. XTAL_IN
30. VDDCORE
31. VSSCORE
32. RESET

Functional Features

• Auto-negotiation: The KS8721BA4-TR supports auto-negotiation, allowing it to automatically determine the best possible connection speed and duplex mode.
• Link Quality Indicator (LQI): This feature provides a measure of the link quality, enabling diagnostics and troubleshooting.
• Energy-Efficient Ethernet (EEE): The transceiver supports EEE, which reduces power consumption during periods of low network activity.

Advantages and Disadvantages

Advantages

• Compact size and low power consumption make it suitable for space-constrained applications.
• Compliance with IEEE 802.3 standards ensures compatibility with a wide range of Ethernet devices.
• Auto-negotiation and LQI features enhance network performance and diagnostics.

Disadvantages

• Limited to 10/100 Mbps data rates, not suitable for Gigabit Ethernet applications.
• Lack of advanced features found in higher-end transceivers.

Working Principles

The KS8721BA4-TR operates by receiving digital signals from the Ethernet controller and converting them into analog signals suitable for transmission over Ethernet cables. It also receives analog signals from the cable and converts them back into digital signals for the Ethernet controller to process.

Detailed Application Field Plans

The KS8721BA4-TR is commonly used in various applications, including: - Network switches - Routers - Industrial automation systems - Embedded systems - Internet of Things (IoT) devices

Detailed and Complete Alternative Models

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

These alternative models offer similar functionality and are suitable replacements depending on specific application requirements.

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