KSZ8721BL

Product Overview

Category

The KSZ8721BL belongs to the category of Ethernet Physical Layer Transceivers.

Use

It is primarily used for providing physical layer connectivity in Ethernet-based communication systems.

Characteristics

• Supports 10/100 Mbps data rates
• Compliant with IEEE 802.3 standards
• Low power consumption
• Integrated termination resistors
• Supports Auto-MDIX (Automatic Medium-Dependent Interface Crossover)

Package

The KSZ8721BL is available in a small form-factor package, making it suitable for space-constrained applications.

Essence

The essence of the KSZ8721BL lies in its ability to provide reliable and efficient Ethernet connectivity in various networking devices.

Packaging/Quantity

The KSZ8721BL is typically packaged in reels or trays, with a quantity of 2500 units per reel/tray.

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: QFN (Quad Flat No-Lead)

Detailed Pin Configuration

The KSZ8721BL features a 48-pin QFN package with the following pin configuration:

1. TX_CLK
2. TX_EN
3. TXD[3]
4. TXD[2]
5. TXD[1]
6. TXD[0]
7. CRS_DV
8. RX_ER
9. RXD[3]
10. RXD[2]
11. RXD[1]
12. RXD[0]
13. COL
14. RX_CLK
15. MDC
16. MDIO
17. VDDA
18. VSSA
19. VDDIO
20. VSSIO
21. VDDXTAL
22. VSSXTAL
23. REFCLKO
24. VDDPLL
25. VSSPLL
26. PLL_LOCK
27. XTAL1
28. XTAL2
29. VDDCORE
30. VSSCORE
31. VDDPLL_DIG
32. VSSPLL_DIG
33. VDDPLL_ANA
34. VSSPLL_ANA
35. VDDPLL_IO
36. VSSPLL_IO
37. VDDPLL_BUF
38. VSSPLL_BUF
39. VDDPLL_CLK
40. VSSPLL_CLK
41. VDDPLL_REF
42. VSSPLL_REF
43. VDDPLL_VCO
44. VSSPLL_VCO
45. VDDPLL_DIV
46. VSSPLL_DIV
47. VDDPLL_OUT
48. VSSPLL_OUT

Functional Features

• Integrated Auto-Negotiation and Auto-MDIX support
• Built-in signal conditioning for improved performance
• Supports Energy Efficient Ethernet (EEE) for reduced power consumption
• Provides link status indication through LED outputs
• Supports various diagnostic features for network troubleshooting

Advantages and Disadvantages

Advantages

• Low power consumption
• Compact package size
• Compliance with industry standards
• Integrated termination resistors simplify design

Disadvantages

• Limited data rate support (10/100 Mbps only)
• Lack of advanced features found in higher-end transceivers

Working Principles

The KSZ8721BL operates by receiving and transmitting electrical signals over the Ethernet medium. It utilizes the MII interface to communicate with the MAC (Media Access Control) layer of the networking device. The transceiver performs signal conditioning, auto-negotiation, and error detection to ensure reliable data transmission.

Detailed Application Field Plans

The KSZ8721BL is widely used in various networking applications, including:

• Ethernet switches
• Network interface cards (NICs)
• Industrial automation systems
• Embedded systems
• Internet of Things (IoT) devices

Detailed and Complete Alternative Models

Some alternative models to the KSZ8721BL include:

1. KSZ8081MNX: Similar functionality with reduced power consumption.
2. DP83848CVV: Higher data rate support (10/100/1000 Mbps) with additional features.
3. LAN8720A: Low-cost alternative with basic functionality.

These alternative models offer different trade-offs in terms of performance, power consumption, and cost, allowing designers to choose the most suitable option for their specific requirements.

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