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PAGE 8 of 15
050-357 Product Brief
PCB Mount Dual-Receiver
HD-SDI & 3G-SDI, SMF, 3.3V
The PCB mount Dual-Receiver interfaces with the host circuit board through twenty I/O pins identified by function in Table
6. The Dual-Receiver high speed receive interface requires SFP MSA compliant signal lines on the host board. The
Rx_LOS lines require TTL lines on the host board (per SFF-8074i) if used. If an application chooses not to take advantage
RX_LOS do not need to be connected.
Digital Diagnostic Interface and Serial Identification (EEPROM)
The PCB mount Dual-Receiver is derived from the SFF-8074i SFP specification and with SFF-8472, the SFP specification
for Digital Diagnostic Monitoring Interface, but modified to account for Dual-Receiver functionality. Both specifications can
be found at http://www.sffcommittee.org.
FIGURE 4 – DIGITAL DIAGNOSTIC MEMORY MAP OVERVIEW
The PCB mount Dual-Receiver features EEPROM for Serial ID, which contains the product data stored for retrieval by
host equipment. This data is accessed via the 2-wire serial EEPROM protocol of the ATMEL AT24C01A or similar,
derived from with the industry standard SFP Multi-Source Agreement but modified to account for Dual-Receiver
functionality. The base EEPROM memory, bytes 0-255 at memory address A0h, is organized in compliance with SFF-
As an enhancement to the conventional SFP interface defined in SFF-8074i, the PCB mount Dual-Receiver is derived
from SFF-8472 (digital diagnostic interface for optical transceivers) with memory organized as shown in Figure 4. This
new digital diagnostic information is stored in bytes 0-255 at memory address A2h (RX1) and A4h (RX2). Using the 2-
wire serial interface defined in the MSA, the PCB mount Dual-Receiver provides real time temperature, supply voltage,
and received input power. These parameters are internally calibrated, per the SFF-8472 MSA. The digital diagnostic
interface also adds the capability to monitor for Receiver Loss of Signal (RX_LOS). The diagnostic information provides
the opportunity for Predictive Failure Identification, Compliance Prediction, Fault Isolation and Component Monitoring.