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AM79C989JC Datenblatt(PDF) 28 Page - Advanced Micro Devices

Teilenummer AM79C989JC
Bauteilbeschribung  Quad Ethernet Switching Transceiver (QuEST??
PDF  37 Pages
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Hersteller  AMD [Advanced Micro Devices]
Direct Link  http://www.amd.com
Logo AMD - Advanced Micro Devices

AM79C989JC Datenblatt(HTML) 28 Page - Advanced Micro Devices

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28
Am79C989
PRELIMINARY
SYSTEM APPLICATIONS
10 Mbps Ethernet Switch
The QuEST device is targeted for use in 10BASE-T
switching applications. The QuEST device provides
four 10BASE-T receive and transmit ports.
Optionally, one of the 10BASE-T ports can be repro-
grammed as an AUI. The four Ethernet ports are multi-
plexed into the QuASI interface which interfaces to a
switching subsystem. The QuEST device provides
10BASE-T filterless technology and a reduced pin
count which enables high levels of switch integration.
Figure 1.
QuEST Device Application Diagram
Note: If QINT and the AUI port are used, a special circuit (not shown) is needed for PCI. Optional
QuEST
RJ45 Connector
RJ45 Connector
RJ45 Connector
RJ45 Connector
AUI Connector
(Optional)
100
Ω
110
Ω
100
Ω
110
Ω
100
Ω
100
Ω
110
Ω
110
Ω
40.2
Ω
40.2
Ω
TXD0+
TXD0-
RXD0+
RXD0-
TXD1-
RXD1+
RXD1-
TXD2+
TXD2-
RXD2+
RXD2-
TXD3+
TXD3-
RXD3+
RXD3-
TXD1+
PCI/CI+
CI-
DI+
DO+
DI-
DO-
1:1
1:1
1:1
1:1
1:1
1:1
1:1
1:1
1:1
1:1
1:1
REXT
QTX_EN
QTX_DATA
QRX_DATA
QRX_VALID
QCLSN
QRX_CRS
SCLK
QRST/STRB
QINT
MDC
MDIO
MDC
MDIO
INT
TX_EN
TX_DATA
RCV_DATA
RCV_DV
CLSN
RCV_CRS
SCLK
RESET
Shared
Signals
Switch
Interface
VDD
VDD
VDD VDD
VDD
or
40.2
Ω
40.2
Ω
0.01
µF to
10.1
µF
0.01
µF to
10.1
µF
21173B-5
10K resistors are used to set internal address match for Management Address.



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