DM9095L ETC [List of Unclassifed Manufacturers], DM9095L Datasheet

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DM9095L

Manufacturer Part Number
DM9095L
Description
Twisted-Pair Medium Attachment Unit
Manufacturer
ETC [List of Unclassifed Manufacturers]
Datasheet
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
Block Diagram
1
DO +
DO -
M D 0
M D 1
M D 2
DI +
DI -
CI +
CI -
O S C 1
Operation
Oscillator
Receiver
Selection
Collision
Squelch
Current
Current
Crystal
Driver
Driver
M o d e
Data
Data
AUI
AUI
AUI
R L E D C L E D X L E D J L E D
Loopback
Control
Collision
Jabber
Control
Drivers
L E D
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.
Pre-Distortion
Auto-Polarity
Detection
Receiver
Integrity
Squelch
Driver
Twisted-Pair Medium Attachment Unit
Data
Data
Link
T P
T P
T P
TPO +
DTPO +
DTPO -
TPO-
LI-
A P
TPI +
TPI -
Version: DM9095-DS-F02
DM9095
August 21, 2000
Final

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DM9095L Summary of contents

Page 1

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 ...

Page 2

... 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 Pin Configuration : DM9095L LI- 5 DI+ 6 DI- 7 ...

Page 3

Pin Description Pin No. Pin Name 1 GND 2 DO+ 3 DO- 4 MD0 5 LI- 6 DI+ 7 DI- 8 CI+ 9 CI- 10 VDD JLED 13 OSC1 14 GND 3 I/O - Ground I Transmitter ...

Page 4

Pin Description (continued) Pin No. Pin Name 15 LCED 16 RLED 17 XLED 18 VDD 19 TPO+ 20 DTPO+ 21 DTPO- 22 TPO- 23 GND 24 MD2 25 MD1 26 TPI- 27 TPI+ 28 VDD Final Version: DM9095-DS-F02 August 21, ...

Page 5

Overview The DM9095 provides the interface between an AUI and a TP wire. The receive, transmit, and collision detection functions of the DM9095 are designed to meet the IEEE 802.3 10BASE-T draft standard. The receive section transfers 10Mbits/s Manchester-encoded data ...

Page 6

Figure 3 (a). Typical System Application for External TPMAU in Mode 5 Final Version: DM9095-DS-F02 August 21, 2000 (Where Link Integrity Test is enabled, Auto-polarity is disabled. LI- is input pin) DM9095 Twisted-Pair Medium Attachment Unit 6 ...

Page 7

Figure 3 (b). Typical System Application for Internal TPMAU in Mode 6 7 DM9095 (Where Link Integrity Test is enabled and Auto Polarity Function is enabled. LI- is output pin) DM9095 Twisted-Pair Medium Attachment Unit Version: DM9095-DS-F02 August 21, 2000 ...

Page 8

Figure 4. Typical Loading Conditions for DI Note: 1. Possible filters are the Pulse Engineering Inc. <PE32101> equivalent. 2. The 1:1 2KV isolation transformer can be a Pulse Engineering <PE65263> or Equivalent. 3. The filters and isolation transformer ...

Page 9

Function Description Transmit Functions The DM9095 receives transmit data from DO + /DO - and transfers it to the TP network. transformer-coupled to the AUI circuit. The receiver is able to pass differential signals as small as 300mV peak and ...

Page 10

Link Integrity Functions In the absence of receive traffic, the twisted-pair receiver on the chip can detect periodic link-integrity pulse is a 100ns high signal with pre-distortion followed by a return to idle. The chip provides a link-integrity reception window, ...

Page 11

Crystal Oscillator An external TTL-Level clock can be applied to the OSC1 pin which is crystal oscillator input. A resistor should be added in series with the clock source to limit the amplitude of the voltage swing seen by the ...

Page 12

AC Electrical Characteristics Symbol Transmit Timing t Transmit delay from Loopback delay from DO TLB t DTPO - to TPO + and DTPO + to TPO - delay TPDY high to idle time TOFF ...

Page 13

AC Electrical Characteristics (continued) Symbol Link Integrity Timing t Transmitted link integrity pulse period LP t Link integrity pulse width for TPO + LPWT t Link integrity pulse width for DTPO LPWD Heartbeat Timing t Heartbeat turn-on time HD t ...

Page 14

Timing Waveforms Final Version: DM9095-DS-F02 August 21, 2000 DM9095 Twisted-Pair Medium Attachment Unit 14 ...

Page 15

DM9095 Twisted-Pair Medium Attachment Unit Version: DM9095-DS-F02 August 21, 2000 Final ...

Page 16

Timing Waveforms (continued) Final Version: DM9095-DS-F02 August 21, 2000 DM9095 Twisted-Pair Medium Attachment Unit 16 ...

Page 17

Timing Waveforms (continued) Figure 10. Transmitted link integrity pulse timing 17 DM9095 Twisted-Pair Medium Attachment Unit Version: DM9095-DS-F02 August 21, 2000 Final ...

Page 18

Timing Waveforms (continued) Final Version: DM9095-DS-F02 August 21, 2000 DM9095 Twisted-Pair Medium Attachment Unit 18 ...

Page 19

Timing Waveforms (continued) 19 DM9095 Twisted-Pair Medium Attachment Unit Version: DM9095-DS-F02 August 21, 2000 Final ...

Page 20

Package Information PLCC 28L Outline Dimensions Note: 1. Dimension D & not include resin fin. 2. Dimensions G mount pad pitch design reference only. Final Version: DM9095-DS-F02 August 21, 2000 & G are for PC Board surface D ...

Page 21

... Ordering Information Part Number Pin Count DM9095L 28 Disclaimer The information appearing in this publication is believed to be accurate. Integrated circuits sold by DAVICOM Semiconductor are covered by the warranty and patent indemnification provisions stipulated in the terms of sale only. DAVICOM makes no warranty, express, statutory, implied or by description regarding the information in this ...

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