AFBR-775BxxxZ / AFBR-785BxxxZ Twelve-Channel Transmitter and Receiver Pluggable, Parallel-Fiber-Optics Modules Data Sheet Description Features The AFBR-775BxxxZ Twelve-Channel, Pluggable, Parallel- High Channel Capacity: 60 Gbps per module Fiber-Optics Transmitter and AFBR-785BxxxZ Twelve- High port density: 19 mm lateral port pitch < 0.51 mm/ Channel, Pluggable, Parallel-Fiber-Optics Receiver are Gbps for TxRx pair high performance fiber optics modules for short-range Low power consumption per Gbps: < 53 mW/Gb/s for parallel multi-lane data communication and interconnect TxRx pair applications. The modules operate at 5.0Gbps per channel over multimode fiber systems using a nominal wave - Based on industry-standard, pluggable, SNAP12 form length of 850 nm. Aggregate bandwidth per transmitter- factor with upgraded pinout for improved signal receiver link is 60G. The electrical interface uses a 10x10 integrity and keyed to prevent mis-plugging with first MEG-Array low-profile mezzanine connector. The optical generation SNAP12 devices interface uses a MTP (MPO) 1x12 ribbon cable connector. Backed by PPOD MSA to enable multiple sources of The thermal interface can be a factory installed heatsink supply for air-cooled systems or thermal seating plane for user Twelve independent channels per module flexibility. The modules incorporate high performance, highly reliable, short wavelength optical devices coupled Separate transmitter and receiver modules with proven circuit technology to provide long life and 850 nm VCSEL array in transmitter PIN array in receiver consistent service. Operates up to 5.0 Gbps with 8b/10b compatible coded data Applications Links up to 150 m at 5.0 Gbps with 2000 MHzkm 50 um High Performance and High Productivity computer MMF interconnects Two power supplies, 2.5 V and 3.3 V, for low power InfiniBand 12X DDR SX interconnects consumption Datacom switch and router backplane connections Dedicated signals for module address, module reset Telecom switch and router backplane connections and host interrupt. Dense 4 Gbps Fibre Channel compatible architectures Two Wire Serial (TWS) interface with maskable interrupt Reach extensions for various protocols including PCI for expanded functionality including: Express, HyperTransport and Serial RapidIO o Individual channel functions: disable, squelch Part Number Ordering Options disable, lane polarity inversion, margin Transmitter Part Numbers o Programmable equalization integrated with DC With fin heat sink / no EMI nose clip AFBR-775BZ blocking caps at transmitter data input With fin heat sink / EMI nose clip AFBR-775BEZ o Programmable receiver output swing and de- With pin heat sink / no EMI nose clip AFBR-775BPZ emphasis level With pin heat sink / EMI nose clip AFBR-775BEPZ o A/D readback: module temperature and supply With no heat sink / no EMI nose clip AFBR-775BHZ voltages, per channel laser current and laser power, With no heat sink / with EMI nose clip AFBR-775BEHZ or received power Receiver Part Numbers o Status: per channel Tx fault, electrical (transmitter) With fin heat sink / no EMI nose clip AFBR-785BZ or optical (receiver) LOS, and alarm flags With fin heat sink / EMI nose clip AFBR-785BEZ 0 to 80 C case temperature operating range With pin heat sink / no EMI nose clip AFBR-785BPZ With pin heat sink / EMI nose clip AFBR-785BEPZ With no heat sink / no EMI nose clip AFBR-785BHZ With no heat sink / with EMI nose clip AFBR-785BEHZ Patent - www.avagotech.com/patents Transmitter Module The optical transmitter module (see Figure 1) incorpo- channel. Status, alarm and fault information are available rates a 12-channel VCSEL (Vertical Cavity Surface Emitting via the TWS interface. The interrupt signal (selectable via Laser) array, a 12-channel input buffer and laser driver, di - the TWS interface as a pulse or static level) is provided to agnostic monitors, control and bias blocks. The transmit- inform hosts of an assertion of an alarm, LOS and/or Tx ter is designed for IEC-60825 and CDRH eye safety com- fault. pliance Class 1M out of the module. The Tx Input Buffer Receiver Module provides CML compatible differential inputs (presenting a nominal differential input impedance of 100 Ohms and The optical receiver module (see Figure 2) incorporates a nominal common mode impedance to signal ground a 12-channel PIN photodiode array, a 12-channel pre- of 25 Ohms) for the high speed electrical interface that amplifier and output buffer, diagnostic monitors, control can operate over a wide common mode range without and bias blocks. The Rx Output Buffer provides CML com - requiring DC blocking capacitors. For module control and patible differential outputs for the high speed electrical interrogation, the control interface (LVTTL compatible) interface presenting nominal single-ended output im- incorporates a Two Wire Serial (TWS) interface of clock pedances of 50 Ohms to AC ground and 100 Ohms dif- and data signals and dedicated signals for host interrupt, ferentially that should be differentially terminated with module address setting and module reset. Diagnostic 100 Ohms. DC blocking capacitors may be required. For monitors for VCSEL bias, light output (LOP), temperature, module control and interrogation, the control interface both supply voltages and elapsed operating time are (LVTTL compatible) incorporates a Two Wire Serial (TWS) implemented and results are available through the TWS interface of clock and data signals and dedicated signals interface. for host interrupt, module address setting and module reset. Diagnostic monitors for optical input power, tem- Over the TWS interface, the user can, for individual perature, both supply voltages and elapsed operating channels, control (flip) polarity of the differential inputs, time are implemented and results are available through de-activate channels, place channels into margin mode, the TWS interface. disable the squelch function and program input equaliza- tion levels to reduce the effect of long PCB traces. A reset Over the TWS interface, the user can, for individual for the control registers is available. Serial ID information channels, control (flip) polarity of the differential outputs, and alarm thresholds are provided. To reduce the need for de-activate channels, disable the squelch function, polling, the TWS interface is augmented with an interrupt program output signal amplitude and de-emphasis signal for the host. and change receiver bandwidth. A reset for the control registers is available. Serial ID information and alarm Alarm thresholds are established for the monitored attri- thresholds are provided. To reduce the need for polling, butes. Flags are set and interrupts generated when the the TWS interface is augmented with an interrupt signal attributes are outside the thresholds. Flags are also set for the host. and interrupts generated for loss of input signal (LOS) and transmitter fault conditions. All flags are latched and will Alarm thresholds are established for the monitored attri- remain set even if the condition initiating the latch clears butes. Flags are set and interrupts generated when the and operation resumes. All interrupts can be masked and attributes are outside the thresholds. Flags are also set flags are reset by reading the appropriate flag register. and interrupts generated for loss of optical input signal The optical output will squelch for loss of input signal (LOS). All flags are latched and will remain set even if unless squelch is disabled. Fault detection or channel the condition initiating the latch clears and operation deactivation through the TWS interface will disable the Laser Driver Tx Input Bu er Rx Output Bu er Preamp Din 11:0 p/n (24) Dout 11:0 p/n (24) 12 Channels 12 Channels 12 Channels 12 Channels SCL SCL SDA SDA Diagnostic Diagnostic IntL IntL Control Control Monitors Monitors Adr 2:0 (3) Adr 2:0 (3) ResetL ResetL Vcc33 (4) Vcc33 (4) Bias Vcc25 (2) Bias Vcc25 (2) Gnd Gnd Figure 2. Receiver Block Diagram Figure 1. Transmitter Block Diagram 2 Electrical Interface 1 x 12 VCSEL Array Optical Interface Electrical Interface 1 x 12 PIN Array Optical Interface