NETBuilder II FDDI Module

NETBuilder II Fiber Distributed Data Interface (FDDI) Module Installation Guide

Multi-mode accepts multi-mode duplex fiber of 62.5/125um. An 11-db optical budget size allows cables up to 2km long.
Interface speed: 25MHz
Controller speed: 12.5MHz
Clocks: 25MHz symbol clock rate, 12.5MHz byte clock rate

Note: In a 4 or 8 slot chassis, the MAC board is installed ABOVE the PHY board.

Note: In 4 or 8 slot chassis, the MAC board MUST be installed first.

Note: Both single- and multi-mode FDDI modules need version 7.2 or later of the NETBuilder Family Bridge/Router software.


FDDI MAC+ Top

CR3 A STATUS LED
CR4 B STATUS LED
CR5 MAC STATUS LED
J1 Optical Bypass Port
J2 Backplane connector to NETBuilder II
PTC1 PTC fuse
U2 LSI L1A9316 CMPI+ 40-0146-000
U5 ATMEL AT28C64B-20JC
U6 Motorola MC68838KBC
U9,11 Cypress CY7C421-25VC
U10 Motorola MC68840FE25B05
U12 ALTERA 39-0048-000
U15 ACTEL A1020B-2 39-0050-001
U16 ALTERA 39-0047-002
U17 ALTERA 39-0049-002

U6 Motorola MC68838KBC Media Access Controller
U10 Motorola MC68840FE25B05 lntegrated Fiber Distributed Data Interface

FDDI MAC+ Bottom

U501-508 Eight MUSIC MU9C1480-12DC 1024 x 64-bit LANCAM

Note: The MAC board contains active components on the bottom side that may come into contact with the board below it.

Note: Do NOT remove the PHY and MAC boards at exactly the same time.


FDDI PHY - Multimode

J1 Backplane connector to NETBuilder II
RP1-9 Dale SOMC 1600-S41
U1 AMD PALCE
U2 AMD PALCE
U3 LSI L1A6189 CMPI 40-0031-000
U4 TI 74ALS373A
U5 ATMEL AT28C64B 20JC
U6-7 Motorola ACT273
U9 AMD AM79C864AKC
U10 AMD AM79C864AKC
U13 Motorola XC68836FNB
U14 Motorola XC68836FNB
XCVR1 FSC Transceiver 269028-5
XCVR2 FSC Transceiver 269028-5
Y2 20.8333MHz xtal
Y3 20.8333MHz xtal

U9,10 Am79C864A Physical Layer Controller With Scrambler (PLC-S)
U13,14 Motorola XC68836FNB FDDI Clock Generator

FSC Transceiver 269028-5 marked 155 Mb/s, 1300nm

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Louis F. Ohland, Peter H. Wendt, David L. Beem, William R. Walsh, Tatsuo Sunagawa, Tomáš Slavotínek, Jim Shorney, Tim N. Clarke, Kevin Bowling, and many others.

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Last update: 29 Mar 2024 - Changelog | About | Legal & Contact