HFBR-57E0LZ/ALZ/PZ/APZ Multimode Small Form Factor Pluggable Transceivers with LC connector for ATM, FDDI, Fast Ethernet and SONET OC-3/SDH STM-1 Data Sheet Description Features RoHS compliant The HFBR-57E0 Small Form Factor Pluggable LC trans- ceivers provide the system designer with a product to Full compliance with ATM Forum UNI SONET OC-3 implement a range of solutions for multimode fiber Fast multimode fiber physical layer specification Ethernet and SONET OC-3 (SDH STM-1) physical layers for Full compliance with the optical performance require- ATM and other services. ments of the FDDI PMD Standard Full compliance with the optical performance require- This transceiver operates at a nominal wavelength of ments of 100Base-FX version of IEEE802.3u 1300 nm with an LC fiber connector interface with an external connector shield (HFBR-57E0). Industry standard Small Form Pluggable (SFP) pack- age Transmitter Section LC duplex connector optical interface The transmitter section of the HFBR-57E0 utilizes a 1300 Operates with 62.5/125 m and 50/125 m multimode nm InGaAsP LED. This LED is packaged in the optical fiber subassembly portion of the transmitter section. It is Single +3.3 V power supply driven by a custom silicon IC which converts differential +3.3 V TTL LOS output PECL logic signals, ECL referenced (shifted) to a +3.3 V Receiver outputs are squelch enabled supply, into an analog LED drive current. Manufactured in an ISO 9001 certified facility Receiver Section Temperature range: 0 C to +70 C HFBR-57E0LZ/PZ: The receiver section of the HFBR-57E0 utilizes an InGaAs -40 C to +85 C HFBR-57E0ALZ/APZ: PIN photodiode coupled to a custom silicon transimped- ance preamplifier IC. It is packaged in the optical subas- Bail de-latch option sembly portion of the receiver. This PIN/preamplifier combination is coupled to a custom Applications quantizer IC which provides the final pulse shaping for OC-3 SFP transceivers are designed for ATM LAN and the logic output and the Loss of Signal (LOS) function. WAN applications such as: The data output is differential. The data output is PECL ATM switches and routers compatible, ECL referenced (shifted) to a +3.3 V power supply. This circuit also includes a loss of signal (LOS) SONET/SDH switch infrastructure detection circuit which provides an open collector logic Multimode fiber ATM backbone links high output in the absence of a usable input optical sig- Fast Ethernet nal. The LOS output is +3.3 V TTL.Loss of Signal 20 V T 1 V T EE EE The Loss of Signal (LOS) output indicates that the optical 19 TD- 2 NC** input signal to the receiver does not meet the minimum detectablelevel for FDDI and OC-3 compliant signals. 18 TD+ 3 Tx Disable When LOS is high it indicates loss of signal. When LOS is 17 V T 4 MOD-DEF(2) EE low it indicates normal operation. The LOS thresholds are 16 V T 5 MOD-DEF(1) set to indicate a definite optical fault has occurred (e.g., CC disconnected or broken fiber connection to receiver, 15 V R 6 MOD-DEF(0) CC failed transmitter). 14 V R 7 NC EE Module Package 13 RD+ 8 LOS 12 RD- The transceiver meets the Small Form Pluggable (SFP) 9 V R EE industry standard package utilizing an integral LC duplex 11 V R 10 V R EE EE optical interface connector. The hot-pluggable capabil- ity of the SFP package allows the module to be installed TOP OF BOARD BOTTOM OF BOARD at any time even with the host system operating and (AS VIEWED THROUGH TOP OF BOARD) on-line. This allows for system configuration changes or ** Connect to Internal Ground. maintenance without system down time. The HFBR-57E0 Figure 2. Connection diagram of module printed circuit board. uses a reliable 1300 nm LED source and requires a 3.3 V dc power supply for optimal design. ment is operating or not. The module is simply inserted, Module Diagrams electrical interface first, under finger pressure. Controlled hot-plugging is ensured by design and by 3-stage pin se- Figure 1 illustrates the major functional components of quencing at the electrical interface. The module housing the HFBR-57E0. The connection diagram of the module makes initial contact with the host board EMI shield miti- is shown in Figure 2. Figures 5 and 7 depict the external gating potential damage due to Electro-Static Discharge configuration and dimensions of the module. (ESD). The 3-stage pin contact sequencing involves (1) Ground, (2) Power, and then (3) Signal pins, making con- Installation tact with the host board surface mount connector in that The HFBR-57E0 can be installed in or removed from any order. This printed circuit board card-edge connector is MultiSource Agreement (MSA) compliant Small Form depicted in Figure 2. Pluggable port regardless of whether the host equip- OPTICAL INTERFACE ELECTRICAL INTERFACE RECEIVER RD+ (Receive Data) Amplification & Light from Fiber Photodetector RD- (Receive Data) Quantizattion Loss of Signal TRANSMITTER TD+ (Transmit Data) Light to Fiber LED LED DRIVER TD- (Transmit Data) TX Disable MOD-DEF2 MOD-DEF1 EEPROM MOD-DEF0 Figure 1. Transceiver functional diagram 2