HFBR-1115T Ver la hoja de datos (PDF) - HP => Agilent Technologies

Número de pieza

componentes Descripción

Fabricante

HFBR-1115T

Fiber Optic Transmitter and Receiver Data Links for 125 MBd

HP => Agilent Technologies 

OPTICAL PORT

OPTICAL PORT

NC

GND

VCC

VCC

GND

DATA

DATA

NC

9

8

10

7

11

6

12

5

13

4

14

3

15

2

16

1

NC

NO PIN

GND

GND

GND

GND

VBB

NC

NC

NO PIN

GND

GND

GND

SD

SD

NO PIN

9

8

10

7

11

6

12

5

13

4

14

3

15

2

16

1

NC

GND

VCC

VCC

VCC

DATA

DATA

NC

Figure 4 illustrates the predicted

OPB associated with the trans-

mitter and receiver specified in this

data sheet at the Beginning of Life

(BOL). This curve represents the

attenuation and chromatic plus

modal dispersion losses associated

with 62.5/125 µm and 50/125 µm

fiber cables only. The area under

the curve represents the remaining

OPB at any link length, which is

available for overcoming non-fiber

cable related losses.

TRANSMITTER

Figure 3. Pinout Drawing.

The optical subassemblies consist

of a transmitter subassembly in

which the LED resides and a

receiver subassembly housing the

PIN-preamplifier combination.

The electrical subassemblies con-

sist of a multi-layer printed circuit

board on which the IC chips and

various sufrace-mounted, passive

circuit elements are attached.

Each transmitter and receiver

package includes an internal shield

for the electrical subassembly to

ensure low EMI emissions and high

immunity to external EMI fields.

The outer housing, including the

ST* port, is molded of filled, non-

conductive plastic to provide

mechanical strength and electrical

isolation. For other port styles,

please contact your Hewlett-

Packard Sales Representative.

Each data-link module is attached

to a printed circuit board via the

16-pin DIP interface. Pins 8 and 9

provide mechanical strength for

these plastic-port devices and will

provide port-ground for forthcom-

ing metal-port modules.

RECEIVER

14

12

62.5/125 µm

10

Application Information

The Applications Engineering

group of the Optical Communi-

cation Division is available to assist

you with the technical understand-

ing and design tradeoffs associated

with these transmitter and receiver

modules. You can contact them

through your Hewlett-Packard

sales representative.

The following information is

provided to answer some of the

most common questions about the

use of these parts.

Transmitter and Receiver

Optical Power Budget

versus Link Length

The Optical Power Budget (OPB)

is the available optical power for a

fiber-optic link to accommodate

fiber cable losses plus losses due to

in-line connectors, splices, optical

switches, and to provide margin for

link aging and unplanned losses

due to cable plant reconfiguration

or repair.

8

6

50/125 µm

4

2

0

0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0

FIBER OPTIC CABLE LENGTH – km

Figure 4. Optical Power Budget at

BOL vs. Fiber Optic Cable Length.

Hewlett-Packard LED technology

has produced 1300 nm LED

devices with lower aging

characteristics than normally asso-

ciated with these technologies in

the industry. The industry

convention is 1.5 dB aging for

1300 nm LEDs; however, HP 1300

nm LEDs will experience less than

1 dB of aging over normal

commercial equipment mission-life

periods. Contact your Hewlett-

Packard sales representative for

additional details.

Figure 4 was generated with a

Hewlett-Packard fiber-optic link

model containing the current

industry conventions for fiber

179

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