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78Q2132

1/10BASE-T HomePNA/Ethernet Transceiver

TDK Corporation 

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

ATdavrganetceSdpeIncfiofircmataiotinon

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

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