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HFBR-5104

FDDI, 100 Mbps ATM, and Fast Ethernet Transceivers in Low Cost 1x9 Package Style

HP => Agilent Technologies 

ATM applications for physical

layers other than 100 Mbps

Multimode Fiber Interface are

supported by Hewlett-Packard.

Products are available for both

the single mode and the multi-

mode fiber SONET OC-3c

(STS-3c) ATM interfaces and the

155 Mbps/194 MBd multimode

fiber ATM interface as specified

in the ATM Forum UNI.

Contact your Hewlett-Packard

sales representative for informa-

tion on these alternative FDDI

and ATM products.

Low Cost 500 m Desktop

Links

The HFBR-5105/-5105T are

1300 nm products which are fully

compliant with the requirements

of the FDDI LCF-PMD standard.

The FDDI LCF-PMD standard is

in the final approval stage as ISO/

IEC WD 9314-9 and ANSI LCF-

PMD Revision 1.3.

These multimode fiber trans-

ceivers can be used for 500 meter

backbone and desktop links for

FDDI, Fast Ethernet, or ATM 100

Mbps traffic.

required 1x10-12 Bit Error Rate

over distances up to 500 meters

using 62.5/125 µm multimode

fiber cables.

This product is intended for use

in cost sensitive applications

where the benefits of fiber optic

links are important.

Transmitter Sections

The transmitter sections of the

HFBR-5103 and HFBR-5105

series utilize 1300 nm Surface

Emitting InGaAsP LEDs and the

HFBR-5104 series uses a low cost

820 nm AlGaAs LED. These LEDs

are packaged in the optical

subassembly portion of the

transmitter section. They are

driven by a custom silicon IC

which converts differential PECL

logic signals, ECL referenced

(shifted) to a +5 Volt supply, into

an analog LED drive current.

Receiver Sections

The receiver sections of the

HFBR-5103 and HFBR-5105

series utilize InGaAs PIN photo-

diodes coupled to a custom

silicon transimpedance preampli-

fier IC. The HFBR-5104 series

uses the same preamplifier IC in

conjunction with an inexpensive

silicon PIN photodiode. These are

packaged in the optical sub-

assembly portion of the receiver.

These PIN/preamplifier combi-

nations are coupled to a custom

quantizer IC which provides the

final pulse shaping for the logic

output and the Signal Detect

function. The data output is dif-

ferential. The signal detect output

is single-ended. Both data and

signal detect outputs are PECL

compatible, ECL referenced

(shifted) to a +5 Volt power

supply.

Package

The overall package concept for

the HP transceivers consists of

the following basic elements; two

optical subassemblies, an

electrical subassembly and the

housing as illustrated in Figure 1

and Figure 1a.

The package outline drawing and

pin out are shown in Figures 2,

2a and 3. The details of this

package outline and pin out are

compliant with the multisource

The HFBR-5105 transceiver

utilizes the duplex SC connector

receptacle specified in the FDDI

LCF-PMD standard.

Alternative 800 nm Low Cost

500 m Desktop Links

The HFBR-5104/-5104T are very

low cost 800 nm alternative to

the HFBR-5105/-5105T for FDDI,

ATM or Fast Ethernet links from

the wiring closet to the desktop.

They comply with the perform-

ance requirements of the draft

FDDI LCF-PMD document as

translated by Hewlett-Packard to

the 800 nm wavelength. This

transceiver will transfer the full

range of FDDI signals at the

DIFFERENTIAL

DATA OUT

SINGLE-ENDED

SIGNAL

DETECT OUT

ELECTRICAL SUBASSEMBLY

QUANTIZER IC

PREAMP IC

DIFFERENTIAL

DATA IN

DRIVER IC

Figure 1. Block Diagram.

TOP VIEW

DUPLEX SC

RECEPTACLE

PIN PHOTODIODE

OPTICAL

SUBASSEMBLIES

LED

127

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