KS8721BT

Product Overview

• Category: Ethernet Transceiver
• Use: The KS8721BT is a high-performance, single-port 10/100BASE-TX/FX Ethernet physical layer transceiver. It is designed for use in various networking applications.
• Characteristics: The KS8721BT offers advanced features such as auto-negotiation, auto-MDIX, and power-down mode. It supports both full-duplex and half-duplex modes of operation.
• Package: The KS8721BT comes in a small form-factor package (SFP) with integrated magnetics, making it suitable for space-constrained designs.
• Essence: The essence of the KS8721BT lies in its ability to provide reliable and efficient Ethernet connectivity in a compact package.
• Packaging/Quantity: The KS8721BT is typically sold in reels or trays, with a quantity of 250 units per reel/tray.

Specifications

• Interface: MII (Media Independent Interface)
• Data Rate: 10/100 Mbps
• Operating Voltage: 3.3V
• Temperature Range: -40°C to +85°C
• Package Type: SFP (Small Form-Factor Pluggable)
• Compliance: IEEE 802.3u (Fast Ethernet), IEEE 802.3ab (Gigabit Ethernet)

Detailed Pin Configuration

The KS8721BT has the following pin configuration:

1. TX_CLK+
2. TX_CLK-
3. TX_EN+
4. TX_EN-
5. TXD0+
6. TXD0-
7. TXD1+
8. TXD1-
9. TXD2+
10. TXD2-
11. TXD3+
12. TXD3-
13. TX_ER+
14. TX_ER-
15. TX_CLKEN+
16. TX_CLKEN-
17. RX_CLK+
18. RX_CLK-
19. RX_DV+
20. RX_DV-
21. RXD0+
22. RXD0-
23. RXD1+
24. RXD1-
25. RXD2+
26. RXD2-
27. RXD3+
28. RXD3-
29. RX_ER+
30. RX_ER-
31. CRS+
32. CRS-
33. MDIO
34. MDC
35. VDD
36. VSS

Functional Features

• Auto-negotiation: The KS8721BT supports auto-negotiation, allowing it to automatically determine the best possible connection speed and duplex mode.
• Auto-MDIX: With auto-MDIX, the transceiver can automatically detect and correct for crossover or straight-through cable connections.
• Power-down Mode: The KS8721BT features a power-down mode that reduces power consumption when the Ethernet link is idle.

Advantages and Disadvantages

Advantages: - Compact form-factor with integrated magnetics - Supports both 10BASE-T and 100BASE-TX/FX Ethernet standards - Advanced features like auto-negotiation and auto-MDIX

Disadvantages: - Limited to single-port connectivity - Does not support Gigabit Ethernet speeds

Working Principles

The KS8721BT operates by converting digital data into analog signals suitable for transmission over Ethernet cables. It uses advanced signal processing techniques to ensure reliable data transfer and supports various Ethernet protocols.

Detailed Application Field Plans

The KS8721BT is commonly used in the following application fields:

1. Networking equipment: Switches, routers, and hubs
2. Industrial automation: PLCs (Programmable Logic Controllers) and industrial control systems
3. Embedded systems: IoT devices, smart appliances, and automotive electronics

Detailed and Complete Alternative Models

1. KSZ8081RNB: Similar to the KS8721BT, this transceiver offers 10/100 Mbps Ethernet connectivity in a compact package.
2. KSZ8863MLL: This multi-port Ethernet switch IC provides advanced features and supports Gigabit Ethernet speeds.

Note: The above alternative models are provided for reference and may have different specifications and pin configurations.

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