10Base-T Solutions Network Interface Adapter National Semiconduct

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10Base-T Solutions Network Interface Adapter National Semiconduct

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10Base-T Solutions Network Interface Adapter
10Base-T Solutions Network Interface Adapter
National Semiconductor System Brief Benham 1991
11222
FIGURE Ethernet Network Interface Adapter INTRODUCTION IEEE Standard Ethernet emerged most popular cost effective Local Area Network (LAN) connecting computers workstations printers other peripherals together Until most Ethernet networks have been connected using Thin Thick Coax cabling 10Base2 10Base5 Specifications respectively With passage 10Base-T Specification inexpensive Twisted Pair wiring used make point-to-point Ethernet connections Shielded Unshielded Twisted Pair wiring commonly used phone cabling will provide same high-speed Mbits Ethernet data rates found Thin Thick Coax networks MARKET DEMANDS With standard will come further proliferation Ethernet into installed base personal computers waiting inexpensive networking solutions While 10BaseT Standard will eventually Ethernet connection choice there will period where market place will demand Coax Twisted Pair Network Interface Adapters MANUFACTURING DILEMMA
manufacturer required produce
more Ethernet designs production satisfy demand either Coax Twisted Pair connections
Production costs rise multiple designs supported
inventoried
Accurate production forecasting becomes even more
crucial short lead times supported DESIGN CHALLENGES
Meet Requirements IEEE Specifications Protect Software Investment Multiple Media Connection Support Streamline Design Manufacturing Lower System Power Consumption Lower System Cost
SB-119
PC-AT registered trademark International Business Machines Corporation C1995 National Semiconductor Corporation 11222 RRD-B30M105 Printed
COMPONENTS Serial Network Interface Controller Twisted Pair (ST-NIC)
ST-NIC FEATURES
Integration DP8390 DP83910 10Base-T Transceiver
Coaxial Transceiver Interface (CTI)
FLEXIBILITY OPTION Network Interface Adapter design using ST-NIC will support three IEEE Standards Physical Layer 10Base-T 10Base2 10Base5
100% Software Preservation
10Base-T Twisted Pair RJ-45 connector 10Base2 Thin Coax connector 10Base5 Thick Coax external cable
Network Interface Adapter would have design manufacturing with option excluding device when only 10Base-T connection needed meet demand This allows manufacturer lower manufacturing inventory costs supporting only design inserting optionally Only software package needed time market reduced
11222
Provides both Twisted Pair Connections Requires only Support Visible Network Statistics Polarity Detection Correction
11222
FIGURE Block Diagram ST-NIC based PC-AT System Interface With this architecture Adapter incorporates transmitter receiver link integrity collision loopback jabber defined IEEE Standard Adapter access board memory prevents system interfering when real-time (transmitting receiving) occuring Port architecture isolates from network traffic unique dual capabilities (with RAM) allow Adapter appear standard Port system provides simple efficient packet transmission reception local channel buffers packets between local memory network while remote channel passes data between local memory system through Port
BILL MATERIALS Function Ethernet Controller Coax Interface Memory Interface System Clock Filter Isolation Resistors Capacitors LEDs Description Twisted Pair EPROM (Optional) Logic Crystal Oscillator Transformer Filter Various Various Various Part DP83902 DP8392 Quantity
LS244 (see below)
TABLE Partial List 10BASE-T Transformer-Filter Products Part Number Pulse Engineering PE65431 Valor PT3877 FL1012 FL1020 Fuse A556-2006-DE 0556-3392-00 0556-2006-00 0556-2006-01 Fil-Mag 78Z1120B-01 78Z1122B-01 78Z1120B-03 PT3877 PT3877 PT3877 PT3877 PT3877 Filter Transformer Choke Termination Resistor Compatible Tested
evaluated sampling 10BASE-T filter-transformer products operation with ST-NIC Other products listed should provide suitable performance have been evaluated this time designer should this list starting point researching suitable products design There single common mode choke transmit channel only
TABLE Pulse Transformer Vendors Company Address Pulse Engineering 12235 Diego 92112 Valor Electronics 6275 Nancy Ridge Diego 92121 Fuse Vorst Jersey City 07302 Fil-Mag 4787 Cardin Street Diego 92111-1416 Phone 619-268-2400 619-268-2515
619-458-1471
619-458-0875
201-432-0463
201-432-9542
619-569-6577
619-569-6073
10Base-T Solutions Network Interface Adapter
LIFE SUPPORT POLICY NATIONAL'S PRODUCTS AUTHORIZED CRITICAL COMPONENTS LIFE SUPPORT DEVICES SYSTEMS WITHOUT EXPRESS WRITTEN APPROVAL PRESIDENT NATIONAL SEMICONDUCTOR CORPORATION used herein Life support devices systems devices systems which intended surgical implant into body support sustain life whose failure perform when properly used accordance with instructions provided labeling reasonably expected result significant injury user
National Semiconductor Corporation 1111 West Bardin Road Arlington 76017 1(800) 272-9959 1(800) 737-7018
critical component component life support device system whose failure perform reasonably expected cause failure life support device system affect safety effectiveness
SB-119
National Semiconductor Europe (a49) 0-180-530 Email cnjwge tevm2 Deutsch (a49) 0-180-530 English (a49) 0-180-532 Fran (a49) 0-180-532 Italiano (a49) 0-180-534
National Semiconductor Hong Kong 13th Floor Straight Block Ocean Centre Canton Tsimshatsui Kowloon Hong Kong (852) 2737-1600 (852) 2736-9960
National Semiconductor Japan 81-043-299-2309 81-043-299-2408
National does assume responsibility circuitry described circuit patent licenses implied National reserves right time without notice change said circuitry specifications

10Base-T Solutions Network Interface Adapter National Semiconduct

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