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78Q2132 Datasheet

  • 78Q2132

  • 1/10BASE-T HomePNA/Ethernet Transceiver

  • 36頁(yè)

  • TDK   TDK

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78Q2132
1/10BASE-T
HomePNA/Ethernet Transceiver
Advanced Information
Target Specification
August 2000
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.
FEATURES
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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
including transmitter disable
modes
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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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