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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 dat pass-through from one transmission media to another, collision detection, transmitting pre-distortion
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.
DM9095 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 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