©2015 Glenair, Inc.

REV: 3

US Cage Code 06324

Printed in USA

GLENAIR, INC.

∙ 1211 AIR WAY ∙ GLENDALE, CA 91201-2497

∙ TEL: 818-247-6000

∙ FAX: 818-500-9912

www.glenair.com

PAGE 8 of 15

E-mail: sales@glenair.com

050-320 Product Brief

PCB Mount Dual Receiver for Single Mode Fiber

100 Mbps – 4.25 Gbps, 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-

8074i.

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.

Compliance Prediction