AFBR-742BHZ

AFBR-742BHZ Datasheet


AFBR-732BWZ/BEWZ/BEHWZ and AFBR-742BZ/BEZ/BEHZ Ultra Short Link Pluggable Parallel Fiber Optic Modules, Transmitter and Receiver

Part Datasheet
AFBR-742BHZ AFBR-742BHZ AFBR-742BHZ (pdf)
Related Parts Information
AFBR-742BEHZ AFBR-742BEHZ AFBR-742BEHZ
AFBR-742BEZ AFBR-742BEZ AFBR-742BEZ
AFBR-742BZ AFBR-742BZ AFBR-742BZ
AFBR-732BWZ AFBR-732BWZ AFBR-732BWZ
AFBR-732BHWZ AFBR-732BHWZ AFBR-732BHWZ
AFBR-732BEHWZ AFBR-732BEHWZ AFBR-732BEHWZ
AFBR-732BEWZ AFBR-732BEWZ AFBR-732BEWZ
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AFBR-732BWZ/BEWZ/BEHWZ and AFBR-742BZ/BEZ/BEHZ Ultra Short Link Pluggable Parallel Fiber Optic Modules, Transmitter and Receiver

Data Sheet

Description The AFBR-732BWZ transmitter and AFBR-742BZ receiver are high performance fiber optic modules for parallel optical data communication applications. These 12channel devices, operating up to 2.5Gbd per channel, provide a cost effective solution for short-reach applications requiring up to 30 Gb/s aggregate bandwidth. These modules are designed to operate on multimode fiber systems at a nominal wavelength of 850 nm. They incorporate high performance, highly reliable, short wavelength optical devices coupled with proven circuit technology to provide long life and consistent service.

The AFBR-732BWZ transmitter module incorporates a 12- channel VCSEL Vertical Cavity Surface Emitting Laser array together with a custom 12-channel laser driver integrated circuit providing IEC-60825 and CDRH Class 1M laser eye safety.

The AFBR-742BZ receiver module contains a 12-channel PIN photodiode array coupled with a custom preamplifier / post amplifier integrated circuit.

Operating from a single V power supply, both modules provide LVTTL or LVCMOS control interfaces and Current Mode Logic CML compatible data interfaces to simplify external circuitry.

The transmitter and receiver devices are housed in MPO receptacled packages. Electrical connections to the devices are achieved by means of a pluggable 10 x 10 connector array.

Features
• RoHS Compliant
• Low cost per Gb/s
• High package density per Gb/s
• volt power supply for low power consumption
• 850 nm VCSEL array source
• 12 independent channels per module
• Separate transmitter and receiver modules
• Gbd data rate per channel
• Standard MPO ribbon fiber connector inter-
face
• Pluggable package
• 50/125 micron multimode fiber operation:

Distance up to 50 m with 50um, 500 MHz.km fiber at Gbd
• Data I/O is CML compatible
• Control I/O is LVTTL compatible
• Manufactured in an ISO 9002 certified facility

Applications
• Proprietary Ultra short link interconnects
Ordering Information

The AFBR-732BWZ and AFBR-742BZ products are available for production orders through the Avago Component Field Sales office.

AFBR-732BWZ No EMI Nose Shield, with Heatsink

AFBR-742BZ No EMI Nose Shield, with Heatsink

AFBR-732BEWZ With EMI Nose Shield, with Heatsink

AFBR-742BEZ With EMI Nose Shield, with Heatsink

AFBR-732BEHWZ With EMI Nose Shield, No Heatsink

AFBR-742BEHZ With EMI Nose Shield, No Heatsink

Patent -

Design Summary Design for low-cost, high-volume manufacturing

Avago’s parallel optics solution combines twelve Gb/s channels into discrete transmitter and receiver modules providing a maximum aggregate data rate of 30 Gb/s. Moreover, these modules employ a heat sink for thermal management when used on high-density cards, have excellent EMI performance, and interface with the industry standard connector systems. They provide the most cost-effective high- density Gb/s per inch solutions for high-data capacity applications. See Figure 1 for the transmitter and Figure 2 for the receiver block diagrams.

The AFBR-732BWZ transmitter and the AFBR-742BZ receiver modules provide very closely spaced, high-speed parallel data channels. Within these modules there will be some level of cross talk between channels. The cross talk within the modules will be exhibited as additional data jitter or sensitivity reduction compared to single-channel performance. Avago Technologies’ jitter and sensitivity specifications include cross talk penalties and thus represent real, achievable module performance.

Functional Description, Transmitter Section

The transmitter section, Figure 1, uses a 12-channel 850 nm VCSEL array as the optical source and a diffractive optical lens array to launch the beam of light into the fiber. The package and connector system are designed to allow repeatable coupling into standard 12-fiber ribbon cable. In addition, this module has been designed to be compliant with IEC 60825 Class 1M eye safety requirements.

The optical output is controlled by a custom IC, which provides proper laser drive parameters and monitors drive current to ensure eye safety. An EEPROM and state machine are programmed to provide both ac and dc current drive to the laser to ensure correct modulation, eye diagram over variations of temperature and power supply voltages.

Functional Description, Receiver Section The receiver section, Figure 2, contains a 12-channel AlGaAs/ GaAs photodetector array, transimpedance preamplifier, filter, gain stages to amplify and buffer the signal, and a quantizer to shape the signal.

The Signal Detect function is designed to sense the proper optical output signal on each of the 12 channels. If loss of signal is detected on an individual channel, that channel output is squelched.

Packaging The flexible electronic subassembly was designed to allow high-volume assembly and test of the VCSEL, PIN photo diode and supporting electronics prior to final assembly.

Regulatory Compliance The overall equipment design into which the parallel optics module is mounted will determine the certification level. The module performance is offered as a figure of merit to assist the designer in considering their use in the equipment design.

Organization Recognition See the Regulatory Compliance Table for a listing of the standards, standards associations and testing laboratories applicable to this product.

Electrostatic Discharge ESD There are two design cases in which immunity to ESD damage is important.

The first case is during handling of the module prior to mounting it on the circuit board. It is important to use normal ESD handling precautions for ESD sensitive devices. These precautions include using grounded wrist straps, work benches, and floor mats in ESD controlled areas.

The second case to consider is static discharges to the exterior of the equipment chassis containing the module parts. To the extent that the MPO connector receptacle is exposed to the outside of the equipment chassis it may be subject to system level ESD test criteria that the equipment is intended to meet.

See the Regulatory Compliance Table for further details.
12 DIN+
12 DIN-

INPUT STAGE

LEVEL SHIFTER

SHUT DOWN

DRIVER

COMPARATOR

AMPLIFIER

D/A CONVERTER 12 VCSEL ARRAY
4 SERIAL CONTROL

I/O*

CONTROLLER

Figure Transmitter block diagram each channel . * TX_EN, TX_DIS, RESET-, FAULT-

TRANSIMPEDANCE PRE-AMPLIFIER

Figure Receiver block diagram each channel .

D/A CONVERTER

TEMPERATURE DETECTION CIRCUIT
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Datasheet ID: AFBR-742BHZ 520055