AFBR-810BxxxZ and AFBR-820BxxxZ
Twelve-Channel Transmitter and Receiver
Pluggable, Parallel-Fiber-Optic Modules
Data Sheet
Description Features
The AFBR-810B Twelve-Channel, Pluggable, Parallel-Fiber- High Channel Capacity: 120 Gbps per module
Optic Transmitter and AFBR-820B Twelve-Channel,
High port density: 19 mm lateral port pitch; < 0.51 mm/
Pluggable, Parallel-Fiber-Optic Receiver are high per-
Gbps for TxRx pair
formance fiber Optic modules for short-range parallel
Low power consumption per Gbps: < 42 mW/Gb/s for
multi-lane data communication and interconnect ap-
TxRx pair
plications. These 12-channel devices are capable of 10.0
Gbps per channel, 120 Gbps raw aggregate operation. Based on industry-standard, pluggable, SNAP12 form
The modules are designed to operate over multimode factor with upgraded pinout for improved signal
fiber systems using a nominal wavelength of 850 nm. The integrity and keyed to prevent mis-plugging with first
electrical interface uses a 10x10 MEG-Array low-profile generation SNAP12 devices
mezzanine connector. The optical interface uses a MTP
Twelve independent channels per module
(MPO) 1x12 ribbon cable connector. The thermal interface
Separate transmitter and receiver modules
can be a factory installed heatsink for air-cooled systems
or thermal seating plane for user flexibility. The modules 850 nm VCSEL array in transmitter; PIN array in receiver
incorporate high performance, highly reliable, short
Operates up to 10 Gbps with 8b/10b compatible coded
wavelength optical devices coupled with proven circuit
data
technology to provide long life and consistent service.
Links up to 50 m at 10 Gbps with 2000 MHzkm 50 um
MMF
Applications
Two power supplies, 2.5 V and 3.3 V, for low power
High Performance and High Productivity computer
consumption
interconnects
Dedicated signals for module address, module reset
InfiniBand QDR SX interconnects
and host interrupt.
Datacom switch and router backplane connections
Two Wire Serial (TWS) interface with maskable interrupt
Telecom switch and router backplane connections
for expanded functionality including:
Individual channel functions: disable, squelch
Part Number Ordering Options
disable, lane polarity inversion, margin
Transmitter Part Numbers
Programmable equalization integrated with DC
AFBR-810BZ With Fin heat sink / no EMI nose clip
blocking caps at transmitter data input
AFBR-810BEZ With Fin heat sink / EMI nose clip
AFBR-810BPZ With Pin heat sink / no EMI nose clip
Programmable receiver output swing and de-
AFBR-810BEPZ With Pin heat sink / EMI nose clip
emphasis level
AFBR-810BHZ With no heat sink / no EMI nose clip
A/D readback: module temperature and supply
AFBR-810BEHZ With no heat sink/ EMI nose clip
voltages, per channel laser current and laser power,
Receiver Part Numbers or received power
AFBR-820BZ With Fin heat sink / no EMI nose clip
Status: per channel Tx fault, electrical (transmitter)
AFBR-820BEZ With Fin heat sink / EMI nose clip
or optical (receiver) LOS, and alarm flags
AFBR-820BPZ With Pin heat sink / no EMI nose clip
0 to 70C case temperature operating range
AFBR-820BEPZ With Pin heat sink / EMI nose clip
AFBR-820BHZ With no heat sink / no EMI nose clip
AFBR-820BEHZ With no heat sink/ EMI nose clip
Patent - www.avagotech.com/patents Transmitter Module
The optical transmitter module (see Figure 1) incorporates disable the squelch function and program input equaliza-
a 12-channel VCSEL (Vertical Cavity Surface Emitting Laser) tion levels to reduce the effect of long PCB traces. A reset
array, a 12-channel input buffer and laser driver, diagnos - for the control registers is available. Serial ID information
tic monitors, control and bias blocks. The transmitter is and alarm thresholds are provided. To reduce the need for
designed for IEC-60825 and CDRH eye safety compliance; polling, the TWS interface is augmented with an interrupt
Class 1M out of the module. The Tx Input Buffer provides signal for the host.
CML compatible differential inputs (presenting a nominal
Alarm thresholds are established for the monitored
differential input impedance of 100 Ohms and a nominal
attributes. Flags are set and interrupts generated when
common mode impedance to signal ground of 25 Ohms)
the attributes are outside the thresholds. Flags are also set
for the high speed electrical interface that can operate
and interrupts generated for loss of input signal (LOS) and
over a wide common mode range without requiring DC
transmitter fault conditions. All flags are latched and will
blocking capacitors. For module control and interroga-
remain set even if the condition initiating the latch clears
tion, the control interface (LVTTL compatible) incorpo-
and operation resumes. All interrupts can be masked and
rates a Two Wire Serial (TWS) interface of clock and data
flags are reset by reading the appropriate flag register. The
signals and dedicated signals for host interrupt, module
optical output will squelch for loss of input signal unless
address setting and module reset. Diagnostic monitors for
squelch is disabled. Fault detection or channel deactiva-
VCSEL bias, light output (LOP), temperature, both supply
tion through the TWS interface will disable the channel.
voltages and elapsed operating time are implemented
Status, alarm and fault information are available via the
and results are available through the TWS interface.
TWS interface. The interrupt signal (selectable via the TWS
Over the TWS interface, the user can, for individual interface as a pulse or static level) is provided to inform
channels, control (flip) polarity of the differential inputs, hosts of an assertion of an alarm, LOS and/or Tx fault.
de-activate channels, place channels into margin mode,
Tx Input Buer Laser Driver
Din[11:0][p/n] (24)
12 Channels 12 Channels
SCL
SDA
IntL
Control Diagnostic Monitors
Adr[2:0] (3)
ResetL
Vcc33 (4)
Bias
Vcc25 (2)
Gnd
Figure 1. Transmitter Block Diagram
2
Electrical Interface
1 x 12 VCSEL Array
Optical Interface