原标题：TI TLK105L 工业温度单端口10、100Mbs以太网收发器参考设计方案

　　TI公司的TLK105L是一款单端口以太网10Base-T和100Base TX 信号收发器芯片，内嵌以双绞线为传输媒介的标准以太网所有物理层接收和发送数据的功能。此外，通过外部增加光端收发器器件可以实现100Base-FX信号收发功能。该芯片通过MII和RMII接口与内部MAC控制器进行数据交互，供电可采用3.3V单独电源供电或采用减少功率的3.3V和1.55V组合方式供电。本文首先介绍芯片的简介、特性、内部框图及应用领域，并给出相应设计方案的设计原理图及元器件列表。

　　The TLK10xL is a single-port Ethernet PHY for 10Base-T and 100Base TX signaling, integrating all the physical-layer functions needed to transmit and receive data on standard twisted-pair cables. Additionally, the TLK10xL supports 100Base-FX signaling via an external optical transceiver. The device supports the standard Media Independent Interface (MII) and Reduced Media Independent Interface (RMII) for direct connection to a Media Access Controller (MAC).

　　The device is designed for power-supply flexibility, and can operate with a single 3.3V power supply or with combinations of 3.3V and 1.55V power supplies for reduced power operation.

　　The TLK10xL uses mixed-signal processing to perform equalization, data recovery, and error correction to achieve robust operation over CAT 5 twisted-pair wiring. The TLK10xL not only meets the requirements of IEEE 802.3, but maintains high margins in terms of cross-talk and alien noise.

　　The TLK10xL Ethernet PHY has a special Power Back Off mode to conserve power in systems with relatively short cables. This mode provides the flexibility to reduce system power when the system is not required to drive the standard IEEE 802.3 100m cable length, or the extended 150m, error-free cable reach of the TLK10xL. For more detail, see application note SLLA328.

　　TLK105L主要特性：

　　IEEE 1588 SFD indication enables time stamping by a controller or processor

　　Low deterministic latency supports IEEE1588 implementation

　　Low Power Consumption: <205mW PHY and 275mW with Center Tap (Typical)

　　Programmable Power Back Off to reduce PHY power up to 20% in systems with shorter cables

　　Cable Diagnostics

　　Variable I/O voltage range: 1.8V to 3.3V

　　3.3V MAC Interface

　　Programmable Fast Link Down Modes, <10µs reaction time

　　Fixed TX Clock to XI, with programmable phase shift

　　Auto-MDIX for 10/100Mbs

　　Energy Detection Mode

　　MII and RMII Interfaces

　　Serial Management Interface

　　IEEE 802.3u MII

　　IEEE 802.3u Auto-Negotiation and Parallel Detection

　　IEEE 802.3u 100BASE-FX Fiber Interface

　　Fully programmable LED for 11 states (Link, Activity , Speed, Blink)

　　Error-Free Operation up to 150 Meters Under Typical Conditions

　　IEEE 802.3u PCS, 100Base-TX Transceivers

　　IEEE 802.3u ENDEC, 10Base-T Transceivers and Filters

　　Integrated ANSI X3.263 Compliant TP-PMD Physical Sublayer with Adaptive Equalization and Baseline Wander Compensation

　　Supports 2 LEDs

　　10/100Mbs Packet BIST (Built in Self Test)

　　HBM ESD protection on RD± and TD± of 16kV

　　32-pin QFN (5mm) × (5mm)

　　Fully pin-compatible with the TLK10x devices

　　TLK105L应用：

　　Industrial Networks and Factory Automation

　　Motor and Motion Control

　　General Embedded Applications

　　图1. TLK105L内部方框图

　　TLK105L方案介绍：

　　Texas Instruments provides the TLK105/6LCUSEVM platform for customer evaluation of TLK105/6L devices, demonstrating the advanced performance described in the TLK10xL data sheet, SLLSEE3. The EVM supports 10/100 Base-T and is compliant with IEEE 802.3 standard. The TLK105/6LCUSEVM operates from a single power supply (5V or 3.3V) from the MII. All other voltages required for the TLK105/6L are internally generated in the device. The TLK105/6LCUSEVM operates over the industrial temperature range.

　　Features

　　The TLK105/6CUSEVM features:

　　• Industrial temperature rating: –40°C ±105°C (the TLK105L maximum temperature is 85°C)

　　• Industrial-temperature external magnetics

　　• Control and status:

　　– Configurable PHY Addresses – any address between 00h-07h (01h default) using jumpers

　　– 4 LEDs – 2 power and 2 status LEDs (Link)

　　• Strap options:

　　– MII or RMII jumper (MII disable)

　　– Resistor strapping options:

　　• Configurable PHY Addresses 08h-31h

　　– RESET_N (RESET) jumper

　　• Connections for the following interfaces:

　　– MII connector

　　– RJ-45 connector

　　• Single-sided component placement

　　• On-board clock – Crystal or Oscillator Dual Footprint

　　• On-board power supplied by MII the connector only, resistors to configure 5V or 3.3V operation

　　TLK105L方案原理图：

　　图2. TLK105L方案原理图

　　TLK105L方案材料清单：