Microchip Technology LAN8700 Ethernet Physical Layer Transceiver
Microchip Technology LAN8700 Ethernet Physical Layer Transceiver (PHY) is a low-power, variable I/O voltage, analog interface IC with HP Auto-MDIX support for high-performance embedded Ethernet applications. The LAN8700 can be configured to operate on a single 3.3V supply utilizing an integrated 3.3V to 1.8V linear regulator. An option is available to disable the linear regulator to optimize system designs that have a 1.8V power plane available.
The LAN8700 integrates an encoder/decoder, scrambler/descrambler, a wave-shaping transmitter, an output driver, a twisted-pair receiver with adaptive equalizer and baseline wander (BLW) correction, and clock and data recovery functions. This device can be configured to support either the media-independent interface (MII) or the reduced media-independent interface (RMII).
The LAN8700 PHY is compliant with IEEE 802.3-2005 standards (MII Pins tolerant to 3.6V) and supports both IEEE 802.3-2005 compliant and vendor-specific register functions. This device includes a full-duplex 10-BASE-T/100BASE-TX transceiver and supports 10-Mbps (10BASE-T) operation on Category 3 and Category 5 unshielded twisted-pair cable, and 100-Mbps (100BASE-TX) operation on Category 5 unshielded twisted-pair cable.
The Microchip Technology LAN8700 Ethernet Physical Layer Transceiver is offered in a low-profile, 36-pin QFN package with a commercial grade 0°C to +70°C operating temperature range. The LAN8700i variant of this device features an extended, industrial-grade -40°C to +85°C operating temperature range.
Features
- Single-chip Ethernet physical layer transceiver (PHY)
- ESD protection levels of ±8kV HBM without external protection devices
- ESD protection levels of EN/IEC61000-4-2, ±8kV contact mode, and ±15kV for air discharge mode per independent test facility
- Comprehensive flexPWR® technology
- Flexible power management architecture
- LVCMOS variable I/O voltage range: +1.6V to +3.6V
- Integrated 3.3V to 1.8V regulator for optional single supply operation
- Regulator can be disabled if 1.8V system supply is available
- Performs HP Auto-MDIX in accordance with IEEE 802.3ab specification
- Cable length greater than 150 meters
- Automatic polarity correction
- Latch-up performance exceeds 150mA per EIA/JESD 78, Class II
- Energy detect power-down mode
- Low current consumption power-down mode
- Low operating current consumption:
- 39mA typical in 10BASE-T and
- 79mA typical in 100BASE-TX mode
- Supports auto-negotiation and parallel detection
- Supports MII and RMII
- Compliant with IEEE 802.3-2005 standards
- MII pins tolerant to 3.6V
- IEEE 802.3-2005 compliant register functions
- Integrated DSP with adaptive equalizer
- Baseline wander (BLW) correction
- Vendor-specific register functions
- 4 LED status indicators
- Operating temperature range
- LAN8700: 0°C to +70°C
- LAN8700i: -40°C to +85°C
- 6.0mm x 6.0mm x 0.9mm QFN36 package
- RoHS compliant
Applications
- Set-top boxes
- Network printers and servers
- LAN on motherboard
- 10/100 PCMCIA/CardBus
- Embedded telecom
- Video record/playback systems
- Cable modems/routers
- DSL modems/routers
- IP and video phones
- Wireless access points
- Digital televisions
- Digital media adaptors/servers
- POS terminals
- Automotive networking
- Gaming consoles
- Security systems
- Power over Ethernet (PoE)
- Access control
Block Diagram
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