78Q2132 Datasheet, PDF (1/36 Pages) TDK Electronics – 1/10BASE-T HomePNA/Ethernet Transceiver

DESCRIPTION
The 78Q2132 is a 1/10 Ethernet transceiver. This
dual speed transceiver interfaces to a 1Mbps Home
LAN and a 10BASE-T network. The Home LAN
interface is fully Home Phoneline Networking Alliance
(HomePNA) compliant extending Ethernet over
POTS. The HomePNA interface includes the pulse
encoder and decoder plus transmit and receive line
interface filters. Only a telco transformer and external
protection devices are required to complete the
interface. The 78Q2132 also integrates MII and
General Purpose Serial Interface (GPSI) MAC
interfaces. The 10BASE-T Ethernet channel includes
Manchester ENDEC and transmitter with an on-chip
pulse-shaper and a low-power line driver. The
10BASE-T transceiver interfaces to Category-3
unshielded twisted pair (Cat-3 UTP) cabling. The
HomePNA port is connected to the line via a
HomePNA compatible 1:1 transformer having a
series capacitor in the line side and the Ethernet port
is connected to the line via 1:1 (Rx) and 1.414:1 (Tx)
isolation transformers. No external filtering is
required. Communication to the MAC is accomplished
through an IEEE-802.3 compliant media independent
interface (MII) or GPSI. The product is designed for
high performance and low power operation, and can
operate from a single 3.3 V or 5 V supply.
78Q2132
1/10BASE-T
HomePNA/Ethernet Transceiver
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August 2000
FEATURES
• 1M8 Home LAN interface over POTS
• HomePNA 1.1 compliant
• Integrated HomePNA interface and line filters
• Simultaneous Spectral Compatibility with
Voice, Fax, ISDN, xDSL, Cable Modem with
HomePNA
• 10BASE-T IEEE-802.3 compliant TX and RX
functions requiring only a dual isolation
transformer interface to the line
• Integrated MII, GPSI and 10BASE-T ENDEC
• Full duplex operation capable in 10BASE-T
• Automatic polarity correction for 10BASE-T
signal reception
• Power-saving and power-down modes
including transmitter disable
• Operates with a single 3.3V or 5V supply
• LINK, TX, RX, COL, 10, 1, FDX/SPD, PWR
LED indicators
• User programmable Interrupt pin
• General Purpose I/O Interface
• 80-Lead or 64-Lead TQFP package
TYPICAL APPLICATION DIAGRAM