QFBR-5978AZ Broadcom

QFBR-5978AZ Digital Diagnostic 650nm Transceiver with SC-RJ connector for Profi Net (10/100 Mbps) Data Sheet Description Features Compatible with electrical and optical performance of The QFBR-5978AZ transceiver provides the system design- the POFAC recommendations for the Fast Ethernet over er with the ability to implement Fast Ethernet (100 Mbps) Plastic Optical Fiber (POF). or Ethernet (10 Mbps) over 50 meter standard bandwidth 0.50.05 NA POF and 100 meter standard bandwidth Compatible with the Electrical and Optical performance 0.370.04 NA HCS fi ber. The connectivity available for the of the Profi Net recommendations the Fast Ethernet over transceiver is SC-RJ. This product is lead free and compliant POF and Hard-Clad Silica Fiber (HCS). with RoHS. Manufactured in an ISO 9001 certifi ed facility DMI Digital Diagnostics Monitoring Interface, Transmitter SFF-8472 Rev 9.3 , provides real-time monitoring of: The transmitter contains a 650nm LED with an integrated - Transmitted optical power driver. The LED driver operates at 3.3 V. It receives a LVPECL - Received optical power compatible electrical input, and converts it into a modu- - Temperature lated current driving the LED. The LED is packaged in an - Supply voltage optical subassembly, part of the transmitter section. The LVPECL Signal Detect Output optical subassembly couples the output optical power ef- Temperature range 25 to +85 C fi ciently into POF or HCS fi ber. Applications Receiver Profi Net applications The receiver utilizes a Si PIN photodiode. The PIN photo- Factory automation at Fast Ethernet speeds diode is packaged in an optical sub-assembly, part of the receiver section. This optical subassembly couples the opti- Fast Ethernet networking over POF and HCS cal power effi ciently from POF or HCS fi ber to the receiving Link Distance up to 50 m POF or 100 m HCS PIN. The integrated IC operates at 3.3 V and converts the (See application note 5290 for details) photocurrent into LVPECL compatible electrical output. Package The transceiver package consist of four basic elements two optical subassemblies, an electrical subassembly and the housing as illustrated in the block diagrams in Figure 1. The package outline drawing and pin out are shown in Figures 2 and 3. HCS is a trademark of OFS Corporation QFBR-5978AZ is compatible with the SC-RJ Connecting System from Reichle & De-Massari AG, SwitzerlandBlock diagram ELECTRICAL SUBASSEMBLY SC-RJ RECEPTACLE DIFFERENTIAL DATA OUT PIN PHOTODIODE SINGLE-ENDED SIGNAL QUANTIZER IC DETECT OUT PREAMP IC OPTICAL SUBASSEMBLIES DMI DIFFERENTIAL LED DATA IN DRIVER IC TOP VIEW Figure 1. Block diagram The optical subassemblies utilize a high volume assembly and electrical isolation. The low profi le of the Avago Tech- process together with low cost lens elements which result nologies transceiver design complies with the maximum in a cost eff ective building block. height allowed for the duplex SC-RJ connector over the entire length of the package. The electrical subassembly consists of a high volume multilayer printed circuit board on which the IC chips and The transceiver is attached to a printed circuit board with various surface mounted passive circuit elements are at- twelve signal pins and the two solder posts, which exit the tached. bottom of the housing. The two solder posts provide the primary mechanical strength to withstand the mechanical The housing includes internal shields for the electrical and loads imposed on the transceiver by mating with the SC- optical subassemblies to insure low EMI emissions and RJ connectored fi ber cables. The solder posts are isolated high immunity to external EMI fi elds. The outer housing from the circuit design of the transceiver and do not re- including the duplex SC-RJ connector is molded of fi lled quire connection to a ground plane on the circuit board non-conductive plastic to provide mechanical strength Figure 2. Package outline drawing. 2