AFBR-57E6APZ Broadcom

AFBR-57E6APZ Multimode Small Form Factor Pluggable Transceivers with LC connector and DMI for FDDI and Fast Ethernet Data Sheet Description Features The AFBR-57E6APZ Small Form Factor Pluggable LC RoHS compliant transceiver provides the system designer a product Lead free to implement FDDI/Fast Ethernet networks with DMI Industry standard Small Form Pluggable (SFP) package physical layers. LC duplex connector optical interface As an enhancement to the conventional SFP interface Operates with 50/125m and 62.5/125m multimode defined in SFF-8074i, the AFBR-57E6APZ is compatible fiber to SFF-8472 (digital diagnostic interface for optical trans- ceivers). Using the 2-wire serial interface defined in the Compatible with 100Base-FX version of IEEE802.3u SFF-8472 MSA, the AFBR-57E6APZ provides real time in- Single +3.3V power supply formation on temperature, LED bias current, LED average +3.3V TTL LOS output output power and receiver average input power. The interface also adds the ability to monitor the Receiver Loss Squelched receiver outputs of Signal (RX LOS). Manufactured in an ISO 9001 certified facility Operating temperature range: -40C to 85C Transmitter Bail de-latch The transmitter contains a 1310nm InGaAsP LED. This LED is packaged in the optical subassembly of the transmit- Hot plug capability ter. It is driven by an integrated circuit which converts differential PECL logic signals into an analog LED drive Applications current. This current is monitored by the digital diagnostic Factory automation at Fast Ethernet speeds interface. The transmitter light output power is inferred from this information. Fast Ethernet networking over multimode fiber. The LED is switched off in case a static signal is present at the PECL inputs. Receiver The receiver utilizes an InGaAs PIN photodiode coupled to a transimpedance pre- and postamplifier IC. It is packaged in the optical subassembly of the receiver. The data output is differential LVPECL. The LOS output is +3.3 V TTL as per SFF-8074i. The PIN photodiode average current is monitored by the digital diagnostic interface as a measure for input optical power. Rx squelch is activated when a low input power is detected.Loss of Signal The Loss of Signal (LOS) output indicates that the optical This printed circuit board card edge connector is depicted input power to the receiver does not meet the minimum in Figure 2. detectable level for FDDI compliance. 20 V T 1 V T EE EE Module package 19 TD 2 NU The transceiver package is compliant with the Small Form 18 TD+ 3 TxDisable Pluggable (SFP) MSA with the LC duplex connector option. 17 V T 4 MOD-DEF(2) EE The hot-pluggable capability of the SFP package allows 16 V T 5 MOD-DEF(1) CC the module to be installed at any time including when 15 V R 6 MOD-DEF(0) CC the host system is on-line and operating. This permits the 14 V R 7 NU EE system to be configured or maintained without system 13 RD+ 8 LOS downtime. The AFBR-57E6APZ requires a 3.3V DC power 12 RD 9 V R EE supply for optimal performance. 11 VEER 10 VEER Module Diagrams TOP OF BOARD BOTTOM OF BOARD Figure 1 illustrates the major functional components of the (AS VIEWED THROUGH TOP OF BOARD) AFBR-57E6APZ. The connection diagram of the module is Figure 2. Connection diagram of module printed circuit board. shown in Figure 2. Figures 5 to 7 depict the external con- figuration and dimensions of the module. Digital Diagnostic Interface and Serial Identification Installation The 2-wire serial interface is based on ATMEL AT24C02C The AFBR-57E6APZ can be installed in or removed from series EEPROM protocol. Conventional EEPROM memory any MultiSource Agreement (MSA) compliant Small Form (bytes 0-255 at memory address 0xA0) is organized in Pluggable port regardless of whether the host equipment compliance with SFF-8074i. As an enhancement the AF- is operating or not. The module is simply inserted, elec- BR-57E6APZ is also compatible to SFF-8472. This enhance- trical interface first, under finger pressure. Controlled ment offers digital diagnostic information at bytes 0-255 hot-plugging is ensured by 3-stage pin sequencing at memory address 0xA2. at the electrical interface. The module housing makes In addition to monitoring of the LED drive current and initial contact with the host board EMI shield mitigating photodiode current, the interface also monitors the trans- potential damage due to Electro-Static Discharge (ESD). mitter supply voltage and the temperature. The transmit- The 3-stage pin contact sequencing involves (1) Ground, ter voltage supply must be provided for the digital diag- (2) Power, and then (3) Signal pins making contact with nostic interface to operate. the host board surface mount connector in that order. OPTICAL INTERFACE ELECTRICAL INTERFACE RECEIVER RD+ (RECEIVE DATA) AMPLIFICATION LIGHT FROM FIBER PHOTO-DETECTOR & QUANTIZATION RD (RECEIVE DATA) Rx LOSS OF SIGNAL MOD-DEF2 (SDA) CONTROLLER & MEMORY MOD-DEF1 (SCL) MOD-DEF0 TRANSMITTER TX DISABLE TD+ (TRANSMIT DATA) LED LED DRIVER LIGHT TO FIBER TD (TRANSMIT DATA) TX FAULT Figure 1. Transceiver functional diagram 2