Electronic Components Datasheet Search |
|
AFCT-5705APZ Datasheet(PDF) 4 Page - AVAGO TECHNOLOGIES LIMITED |
|
AFCT-5705APZ Datasheet(HTML) 4 Page - AVAGO TECHNOLOGIES LIMITED |
4 / 20 page 4 Figure 4. MSA required power supply filter V CCT 0.1 µF 0.1 µF 10 µF 1 µH 1 µH 0.1 µF 10 µF 3.3 V SFP MODULE V CCR HOST BOARD TX_FAULT A laser fault or a low VCC condition will activate the transmitter fault signal, TX_FAULT, and disable the laser. This signal is an open collector output (pull-up required on the host board); A low signal indicates normal laser operation and a high signal indicates a fault. The TX_ FAULT will be latched high when a laser fault occurs and is cleared by toggling the TX_DISABLE input or power cycling the transceiver. The TX_FAULT is not latched for Low VCC. The transmitter fault condition can also be monitored via the two-wire serial interface (address A2h, byte 110, bit 2). Eye Safety Circuit Under normal operating conditions, the laser power will be maintained below the eye-safety limit. If the eye safety limit is exceeded at any time, a laser fault will occur and the TX_FAULT output will be activated. Receiver Section The receiver section for the AFCT-570xZ contains an InGaAs/InP photo detector and a preamplifier mounted in an optical subassembly. This optical subassembly is coupled to a post amplifier/decision circuit on a circuit board. The design of the optical subassembly provides better than 12 dB Optical Return Loss (ORL). Connection to the receiver is provided via a LC optical connector. RX_LOS The receiver section contains a loss of signal (RX_LOS) circuit to indicate when the optical input signal power is insufficient for Fibre Channel compliance. A high signal indicates loss of modulated signal, indicating link failure such as a broken fiber or a failed transmit- ter. RX_LOS can be also be monitored via the two-wire serial (address A2h, byte 110, bit 1). Functional Data I/O Avago’s AFCT-570xZ transceiver is designed to accept industry standard differential signals. The transceiver provides an AC-coupled, internally terminated data interface. Bias resistors and coupling capacitors have been included within the module to reduce the number of components required on the customer’s board. Figure 2 illustrates the recommended interface circuit. Digital Diagnostic Interface and Serial Identification The AFCT-570xZ family complies with the SFF-8074i specification, which defines the module’s serial identi- fication protocol to use the 2-wire serial CMOS EEPROM protocol of the ATMEL AT24C01A or similar. Standard SFP EEPROM bytes 0-255 are addressed per SFF-8074i at memory address 0xA0 (A0h). As an enhancement to the conventional SFP interface defined in SFF-8074i, the AFCT-5705Z is also compliant to SFF-8472 (the digital diagnostic interface for SFP). This enhancement adds digital diagnostic monitoring to standard SFP functionality, enabling failure predic- tion, fault isolation, and component monitoring capa- bilities. Using the 2-wire serial interface, the AFCT-5705Z pro- vides real time access to transceiver internal supply voltage and temperature, transmitter output power, laser bias current and receiver average input power, allowing a host to predict system compliance issues. These five parameters are internally calibrated, per the MSA. New digital diagnostic information is accessed per SFF-8472 using EEPROM bytes 0-255 at memory address 0xA2 (A2h). The digital diagnostic interface also adds the ability to disable the transmitter (TX_DISABLE), monitor for Trans- mitter Faults (TX_FAULT) and monitor for Receiver Loss of Signal (RX_LOS). Contents of the MSA-compliant serial ID memory are shown in Tables 10 through 14. The SFF-8074i and SFF- 8472 specifications are available from the SFF Commit- tee at http://www.sffcommittee.org. Predictive Failure Identification The diagnostic information allows the host system to identify potential link problems. Once identified, a fail-over technique can be used to isolate and replace suspect devices before system uptime is impacted. |
Similar Part No. - AFCT-5705APZ |
|
Similar Description - AFCT-5705APZ |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.NET |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |