DM9095 Datasheet, PDF (1/21 Pages) List of Unclassifed Manufacturers – Twisted-Pair Medium Attachment Unit

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