HFBR-5103A Просмотр технического описания (PDF) - HP => Agilent Technologies

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HFBR-5103A

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

HP => Agilent Technologies 

Notes:

1. This is the maximum voltage that

can be applied across the Differen-

tial 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

constant current flow from the

power supply. Constant current

operation helps to prevent un-

wanted 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. These values are 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. Duty Cycle Distortion contributed

by the receiver is measured at the

50% threshold using an IDLE Line

State, 125 MBd (62.5 MHz square-

wave), input signal. The input

optical power level is -20 dBm

average. See Application Informa-

tion - Transceiver Jitter Section for

further information.

9. Data Dependent Jitter contributed

by the receiver is specified with the

FDDI DDJ test pattern described in

the FDDI PMD Annex A.5. The input

optical power level is -20 dBm

average. See Application Informa-

tion - Transceiver Jitter Section for

further information.

10. Random Jitter contributed by the

receiver is specified with an IDLE

Line State, 125 MBd (62.5 MHz

square-wave), input signal. The

input optical power level is at

maximum “PIN Min. (W)”. See

Application Information - Trans-

ceiver Jitter Section for further

information.

11. 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 convention for long

wavelength LEDs. The actual

degradation observed in Agilent’s

1300 nm LED products is < 1 dB, as

specified in this data sheet.

• Over the specified operating voltage

and temperature ranges.

• With HALT Line State, (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.

12. 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 expressed as a percentage.

With the transmitter driven by a

HALT Line State (12.5 MHz square-

wave) signal, the average optical

power is measured. The data “1”

peak power is then calculated by

adding 3 dB to the measured

average optical power. The data “0”

output optical power is found by

measuring the optical power when

the transmitter is driven by a logic

“0” input. The extinction ratio is the

ratio of the optical power at the “0”

level compared to the optical power

at the “1” level expressed as a

percentage or in decibels.

13. The transmitter provides compli-

ance with the need for

Transmit_Disable commands from

the FDDI SMT layer by providing an

Output Optical Power level of < -45

dBm average in response to a logic

“0” input. This specification applies

to either 62.5/125 µm or 50/125 µm

fiber cables.

14. This parameter complies with the

FDDI PMD requirements for the

tradeoffs between center wave-

length, spectral width, and rise/fall

times shown in Figure 9.

15. This parameter complies with the

optical pulse envelope from the

FDDI PMD shown in Figure 10. The

optical rise and fall times are

measured from 10% to 90% when

the transmitter is driven by the FDDI

HALT Line State (12.5 MHz square-

wave) input signal.

16. Duty Cycle Distortion contributed

by the transmitter is measured at a

50% threshold using an IDLE Line

State, 125 MBd (62.5 MHz square-

wave), input signal. See Application

Information - Transceiver Jitter

Performance Section of this data

sheet for further details.

17. Data Dependent Jitter contributed

by the transmitter is specified with

the FDDI test pattern described in

FDDI PMD Annex A.5. See Applica-

tion Information - Transceiver Jitter

Performance Section of this data

sheet for further details.

18. Random Jitter contributed by the

transmitter is specified with an IDLE

Line State, 125 MBd (62.5 MHz

square-wave), input signal. See

Application Information - Trans-

ceiver Jitter Performance Section of

this data sheet for further details.

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