Specifications

9
Application Note: SFP+ Evaluation Board
Table 2 Description of pins on DB-25 Connector J5
Pin Label Description
1 VCCR Provides access to VCCR, can be monitored or applied via this pin
2 IR+ Provides access to monitor Receiver current (see schematic)
3 VCCT Provides access to VCCT, can be monitored or applied via this pin
4 IT+ Provides access to monitor Transmitter current (see schematic)
5 Not Used
6 TX_FLT Monitor transmitter fault condition
7 TX_DIS Monitor transmitter disable condition
8 MODDEF2 Monitor or apply SDA
9 MODDEF1 Monitor or apply SCL
10 MODEF0 Monitor MOD_ABS
11 Rate_SEL0 Monitor or apply RS0
12 LOS_FP Monitor receiver loss of signal
13 RATE_SEL1 Monitor or apply RS1
14 TEST_3.3V Monitor or apply 3.3V test voltage
15-24 GND These pins are grounded.
25 TEST_5V Monitor or apply 5V Test voltage
5.1.6 J6-J9: Electrical High-Speed Interface TX/RX (SMA connectors)
• J6: RD- (Receiver Data Complement)
• J7: RD+ (Receiver Data)
• J8: TD+ (Transmitter Data)
• J9: TD- (Transmitter Data Complement)
5.2 Jumpers
5.2.1 Power Supply JP1, JP2
•VCCT; 4-Pin connector for TX Power Supply (3.3 V) labeled “VT+” (LED D11)
- Sense terminals are labeled VTS+ and VTS-
•V
CCR; 4-Pin connector for RX Power Supply (3.3 V) labeled “VR+” (LED D10)
- Sense terminals are labeled VRS+ and VRS-.
• JP1, JP2: Jumper to connect RX and TX Power supply (optional)
- The board is shipped with R18 and R19 populated with 0 Ω resistors. To separate the TX
and RX power supplies the resistors need to be removed.
- Once the 0 Ω resistors are removed, shorting either jumper will connect VT+ to VR+.