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DM9095 Datasheet Preview

DM9095 Datasheet

Twisted-Pair Medium Attachment Unit

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General Description
The DM9095 twisted-pair Media Attachment Unit
(TPMAU) is designed to allow Ethernet connections
to use existing Twisted-pair wiring plants through an
Ethernet Attachment Unit Interface (AUI). The
DM9095 provides the electrical interface between
the AUI and the twisted-pair wire.
The DM9095’s functions include level-shifted data
pass-through from one transmission media to
another, collision detection, transmitting pre-
distortion
DM9095
Twisted-Pair Medium Attachment Unit
generation, receiving squelch function, selectable
signal-quality-error (SQE) test generation, a link-
integrity strapping option, and automatic correction
of polarity reversal on the twisted pair input. The
DM9095 also includes LED drivers for transmit,
receive, jabber, collision, reversed polarity detect
and link status.
The DM9095 is an advanced CMOS device
available in 28-pin PLCC packages.
Block Diagram
DO +
DO -
MD0
MD1
MD2
DI +
DI -
CI +
CI -
OSC1
AUI
Data
Receiver
AUI
Data
Squelch
Operation
Mode
Selection
AUI
Current
Driver
Collision
Current
Driver
Crystal
Oscillator
Jabber
Loopback
Control
Collision
Control
LED
Drivers
RLED CLED XLED JLED
TP
Pre-Distortion
Driver
TPO +
DTPO +
DTPO -
TPO-
Link
Integrity
LI-
Auto-Polarity
Detection
TP
Data
Receiver
TP
Data
Squelch
AP
TPI +
TPI -
1 Final
Version: DM9095-DS-F02
August 21, 2000




Davicom

DM9095 Datasheet Preview

DM9095 Datasheet

Twisted-Pair Medium Attachment Unit

No Preview Available !

Features
• Compatible with or exceeds IEEE 802.3
standards for AUI and 10BASE-T interfaces
• Internal pre-distortion generator for TP driver
• Smart squelch circuitry on all received data
• Selectable heartbeat function
• Selectable line-integrity test with LED indication
• LED indicator for transmit, receive, jabber, and
collision
• Advanced analog CMOS process using single 5V
DM9095
Twisted-Pair Medium Attachment Unit
supply
• Lower TP threshold option for long length
application
• Selectable auto-polarity detection and correction
function with LED indication
• Automatic AUI/RJ45 selection
• Power-down mode
• Full ESD protection
Pin Configuration : DM9095L
LI-
DI+
DI-
CI+
CI-
VDD
AP
5
6
7
8
9
10
11
DM9095L
25 MD1
24 MD2
23 GND
22 TPO-
21 DTPO-
20 DTPO+
19 TPO+
Final
Version: DM9095-DS-F02
August 21, 2000
2


Part Number DM9095
Description Twisted-Pair Medium Attachment Unit
Maker Davicom
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