Specifications

5.1.4 J4: SFP+ Connector

Some SFP edge card connectors may not be compatible with higher speed SFP+ applications. SFP+

connectors for 8.5 and 10 G applications are produced by Tyco Electronics

and Molex

. The Tyco part

number is 1888247-1. The Tyco part is a distinctive off-white color enabling it to be easily distinguished

from other connectors. Molex produces two parts with different electrical plating thicknesses. Part

number 74441-0001 has 15 micro-inch gold plating, and is most common. Part number 74441-0010 has

30 micro-inch gold plating. See SFF-8083 for more information about the SFP+ card edge connector.

5.1.4.1 SFP+ Connector Pin Definitions

Figure 6 shows the Pin Definitions for SFP+ based on a draft of SFF-8431 Revision 2.1. Notice that

pins 7 and 9 (RS0 and RS1, respectively) are the rate-select pins that control the rate-select functionality.

These pins are defined in SFF 8431 as logic high for bit rates greater than 4.25Gbps and logic low for

4.25 Gbps and below. RS0 is designated for the RX, and RS1 is designated for the TX. JDSU modules

do not currently use RS1 as the TX is in specification for all the bit rates from 2 to 8 Gbps without

requiring a TX rate select. In addition, non-rate select modules are not affected by signals on these

pins. Internal 30 kΩ pull-down resistors connect RS0 and RS1 to ground in all JDSU SFP+ modules.

5.1.5 J5: DB-25 Connector

Connector J5 is a DB-25 connector (jack) that provides access to many of the modules monitor and

control functions. Table 2 on page 9 provides a list of the pins with a description of each pin’s function.

3. Tyco Electronics, www.tycoelectronics.com 1-887-800-7245

4. Molex http://www.molex.com/ 1-800-78MOLEX

Application Note: SFP+ Evaluation Board

Figure 6: Host PCB SFP+ pinout top view as defined in SFF-8431 R2.1