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HFBR-5205T

ATM Multimode Fiber Transceivers for SONET OC-3/SDH STM-1 in Low Cost 1x9 Package Style

HP => Agilent Technologies 

HFBR-5205/-5205T

Receiver Optical and Electrical Characteristics

(TA = 0°C to 70°C, VCC = 4.75 V to 5.25 V)

Parameter

Symbol

Min.

Input Optical Power

Minimum at Window Edge

PIN Min. (W)

Input Optical Power

Minimum at Eye Center

PIN Min. (C)

Input Optical Power Maximum

Operating Wavelength

Systematic Jitter Contributed

by the Receiver

PIN Max.

λ

SJ

-14

1260

Random Jitter Contributed

by the Receiver

Signal Detect - Asserted

Signal Detect - Deasserted

Signal Detect - Hysteresis

Signal Detect Assert Time

(off to on)

RJ

PA

PD

PA - PD

PD + 1.5 dB

-45

1.5

0

Signal Detect Deassert Time

0

(on to off)

Typ.

0.2

1

55

110

Max.

-30

-31

1360

1.2

1.91

-31

100

350

Unit

dBm avg.

dBm avg.

dBm avg.

nm

ns p-p

ns p-p

dBm avg.

dBm avg.

dB

µs

µs

Reference

Note 16

Figure 10

Note 17

Figure 10

Note 16

Note 18

Note 19

Note 20

Note 21

Note 22

Note 23

Notes:

1. This is the maximum voltage that

can be applied across the Differential

Transmitter Data Inputs to prevent

damage to the input ESD protection

circuit.

2. The outputs are terminated with

50 Ω connected to VCC -2 V.

3. The power supply current needed to

operate the transmitter is provided

to differential ECL circuitry. This

circuitry maintains a nearly con-

stant current flow from the power

supply. Constant current operation

helps to prevent unwanted electrical

noise from being generated and

conducted or emitted to neighboring

circuitry.

4. This value is measured with the

outputs terminated into 50 Ω

connected to VCC -2 V and an Input

Optical Power level of -14 dBm

average.

5. The power dissipation value is the

power dissipated in the receiver

itself. Power dissipation is calcu-

lated as the sum of the products of

supply voltage and currents, minus

the sum of the products of the

output voltages and currents.

6. This value is measured with respect

to VCC with the output terminated

into 50 Ω connected to VCC -2 V.

7. The output rise and fall times are

measured between 20% and 80%

levels with the output connected to

VCC -2 V through 50 Ω.

8. These optical power values are

measured with the following

conditions:

• The Beginning of Life (BOL) to

the End of Life (EOL) optical

power degradation is typically

1.5 dB per the industry conven-

tion for long wavelength LEDs.

The actual degradation observed

in Hewlett-Packard’s 1300 nm

LED products is <1 dB, as

specified in this datasheet.

• Over the specified operating

voltage and temperature ranges.

• With 25 MBd (12.5 MHz square-

wave) input signal.

• At the end of one meter of noted

optical fiber with cladding modes

removed.

The average power value can be

converted to a peak power value

by adding 3 dB. Higher output

optical power transmitters are

available on special request.

9. The same comments of note 9 apply

except that industry convention for

short wavelength LED (800 nm)

aging is 3 dB. This value for Output

Optical Power will provide a

minimum 6 dB optical power budget

at the EOL, which will provide at

least 150 meter link lengths with

margin left over for overcoming

normal passive losses, such as in-

line connectors, in the cable plant.

The actual degradation observed in

normal commercial environments

will be considerably less than this

amount with Hewlett-Packard’s 800

nm LED products. Please consult

with your local HP sales representa-

tive for further details.

10. The Extinction Ratio is a measure of

the modulation depth of the optical

signal. The data “0” output optical

power is compared to the data “1”

peak output optical power and

124

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