AFBR-57J5APZ Digital Diagnostic SFP, 850nm 3.072/2.4576 Gb/s, RoHS OBSAI/CPRI Compatible Optical Transceiver Data Sheet Description Features Avagos AFBR-57J5APZ optical transceiver supports Fully RoHS Compliant high speed serial links over multimode optical fiber at Diagnostic Features Per SFF-8472 Diagnostic signaling rates up to 3.7Gb/s for wireless base station ap- Monitoring Interface for Optical Transceivers plications involving the OBSAI or CPRI protocols, as well Real time monitors of: as related applications. The transceiver is compliant with Small Form Pluggable (SFP) multi-source agreements INF- o Transmitted Optical Power 8074 and SFF-8472 for mechanical and electrical specifi - o Received Optical Power cations and FOCIS/IEC specifications for optical duplex LC o Laser Bias Current connectors. o Temperature As an enhancement to the conventional SFP interfaced o Supply Voltage defined in INF-8074, the AFBR-57J5APZ is compliant to SFF-8472 (Digital Diagnostic Interface for Optical Trans- Industrial Temperature and Supply Voltage Operation ceivers). Using the 2-wire serial interface defined in SFF- (-40C to 85C) (3.3V 10%) 8472, the transceiver provides real time temperature, Transceiver Specifications per SFP (INF-8074) and SFF- supply voltage, laser bias current, laser average output 8472 (revision 9.6) power and received input power. This information is in Up to 300m with 50m OM3 for 3.7 Gb/s addition to conventional SFP base data. The digital diag- nostic interface also adds the ability to disable the trans- Up to 400m with 50m OM3 for OBSAI 3.072 Gb/s mitter and monitor the status of transmitter fault and Up to 500m with 50m OM3 for CPRI 2.457 Gb/s receiver loss of signal. LC Duplex optical connector interface conforming to ANSI TIA/EIA604-10 (FOCIS 10A) Related Products 850nm Vertical Cavity Surface Emitting Laser (VCSEL) AFBR-57R5AEZ: 850nm +3.3V LC SFP Source Technology for 4.25/2.125/1.0625 GBd Fibre Channel IEC 60825-1 Class 1/CDRH Class 1 laser eye safe AFCT-57J5APZ: 1310nm +3.3V LC SFP for CPRI/OBSAI Applications Compatible with Fibre Channel and Gigabit Ethernet applications AFCT-57J5ATPZ: 1310nm +3.3V LC SFP for CPRI/OBSAI Applications Applications AFBR-57D7APZ: 850nm +3.3V LC SFP Wireless and cellular base station system interconnect for 8.5/4.25/2.125 GBd Fibre Channel OBSAI rates 3.072 Gb/s, 1.536 Gb/s, 0.768 Gb/s AFCT-57D5ATPZ: 1310nm +3.3V LC SFP for 8.5/4.25/2.125 GBd Fibre Channel CPRI rates 2.4576 Gb/s, 1.2288 Gb/s, 0.6144 Gb/s Patent - www.avagotech.com/patents AFBR-57J5APZ 850nm LASER PROD 21CRF(J) CLASS1 SINGAPORE 0446 PPOC-4102-DIn2 SN: AJ0446CD1Ccontrol signal. Tx Disable can also be asserted via the Digital Diagnostic Interface and Serial Identification two-wire serial interface (address A2h, byte 110, bit 6) The 2-wire serial interface is based on ATMEL AT24C01A and monitored (address A2h, byte 110, bit 7). series EEPROM protocol and signaling detail. Conven- The contents of A2h, byte 110, bit 6 are logic ORd with tional EEPROM memory, bytes 0-255 at memory address hardware Tx Disable (pin 3) to control transmitter 0xA0, is organized in compliance with INF-8074. New operation.. digital diagnostic information, bytes 0-255 at memory address 0xA2, is compliant to SFF-8472. The new diag- Transmit Fault (Tx Fault) nostic information provides the opportunity for Predic- tive Failure Identification, Compliance Prediction, Fault A catastrophic laser fault will activate the transmitter Isolation and Component Monitoring. signal, TX FAULT, and disable the laser. This signal is an open collector output (pull-up required on the host The I2C accessible memory page address 0xB0 is used in- board). A low signal indicates normal laser operation ternally by SFP for the test and diagnostic purposes and and a high signal indicates a fault. The TX FAULT will it is reserved. be latched high when a laser fault occurs and is cleared by toggling the TX DISABLE input or power cycling the Transmitter Section transceiver. The transmitter fault condition can also be The transmitter section includes consists of the Trans- monitored via the two-wire serial interface (address A2, mitter Optical SubAssembly (TOSA) and laser driver byte 110, bit 2). circuitry. The TOSA, containing an 850nm VCSEL (Vertical Cavity Surface Emitting Laser) light source, is located Eye Safety Circuit at the optical interface and mates with the LC optical The AFBR-57J5APZ provides Class 1 (single fault tolerant) connector. The TOSA is driven by a custom IC which eye safety by design and has been tested for compliance uses the incoming differential high speed logic signal with the requirements listed in Table 1. The eye safety to modulate the laser diode driver current. This Tx laser circuit continuously monitors the optical output power driver circuit regulates the optical power at a constant level and will disable the transmitter upon detecting an level provided the incoming data pattern is dc balanced unsafe condition beyond the scope of Class 1 certifica - (8B/10B code, for example). tion. Such unsafe conditions can be due to inputs from the host board (Vcc fluctuation, unbalanced code) or a Transmit Disable (Tx Disable) fault within the transceiver. The AFBR-57J5APZ accepts a TTL and CMOS compat- ible transmit disable control signal input (pin 3) which Receiver Section shuts down the transmitter optical output. A high signal The receiver section includes the Receiver Optical implements this function while a low signal allows SubAssembly (ROSA) and the amplification/quanti - normal transceiver operation. In the event of a fault (e.g. zation circuitry. The ROSA, containing a PIN photodi- eye safety circuit activated), cycling this control signal ode and custom transimpedance amplifier, is located resets the module as depicted in Figure 4. An internal at the optical interface and mates with the LC optical pull up resistor disables the transceiver transmitter until connector. The ROSA output is fed to a custom IC that the host pulls the input low. Host systems should allow provides post-amplification and quantization. a 10ms interval between successive assertions of this Electrical Interface Receiver Optical Interface Rate Select RD+ (Receive Data) Amplification & Light from Fiber Photo-Detector Quantization RD- (Receive Data) Rx Loss Of Signal MOD-DEF2 (SDA) EEPROM EEPROM MOD-DEF1 (SCL) CONTROLLER MOD-DEF0 Transmitter TX DISABLE TD+ (Transmit Data) Laser Driver & Light to Fiber VCSEL Safety Circuit TD- (Transmit Data) TX FAULT Figure 1. Transceiver Functional Diagram 2