NDFP-GE-B20 high performance, cost-effective 1.25G BiDi SFP transceiver complies with the Small Form Factor Pluggable Multi-Sourcing Agreement (MSA). It provides Digital diagnostics functions via a 2-wire serial interface as specified in SFF-8472. It adopts high-performance FP/DFB transmitter and high-sensitivity PIN receiver, provides up to 14dB link budge for Gigabit Ethernet applications up to 20km on a single core single mode fiber.

Features:

² Up to 1.25Gb/s Data Links

² Hot-Pluggable

² Simplex LC connector; SC optional

² 1310nm FP or 1490/1550nm DFB transmitter, PIN photo-detector

² 20km on a single core SMF

² 2-wire interface for management specifications compliant

with SFF 8472 digital diagnostic monitoring interface

² Power Supply :+3.3V

² Power consumption<1W

² Temperature Range: 0~ 70°C, -40°C to 85°C/-5°C to 85°C available

² RoHS compliant

Applications:

² 1000Base-LX Ethernet

² Metro/Access Networks

² 1G Fibre Channel

² Other Optical Links

Ordering Information:

“-E” for extended temperature -5°C to 85°C;

“-I” for extended temperature -40°C to 85°C.

Absolute Maximum Ratings

Recommended Operating Environment:

Electrical Characteristics (TOP = 0 to 70 °C, VCC = 3.135 to 3.465 Volts)

Notes: 1. AC coupled. 2. Or open circuit. 3. Into 100 ohm differential termination. 4. 20 – 80 %

5. LOS is LVTTL. Logic 0 indicates normal operation; logic 1 indicates no signal detected.

6. All transceiver specifications are compliant with a power supply sinusoidal modulation of 20 Hz to 1.5MHz up to specified value applied through the power supply filtering network shown on page 23 of the Small Form-factor Pluggable (SFP) Transceiver Multi-Source Agreement (MSA), September 14, 2000.

Optical Parameters (T_OP = 0 to 70°C, VCC = 3.135 to 3.465 Volts)

Ø Pin Function Definitions

Notes: 1. Circuit ground is internally isolated from chassis ground.

2. Laser output disabled on TDIS >2.0V or open, enabled on TDIS <0.8V.

3. Should be pulled up with 4.7k - 10 kohms on host board to a voltage between 2.0V and 3.6V. MOD_DEF(0) pulls line low to indicate module is plugged in.

4. Rate select is not used

5. LOS is open collector output. Should be pulled up with 4.7k – 10 kohms on host board to a voltage between 2.0V and 3.6V. Logic 0 indicates normal operation; logic 1 indicates loss of signal.

6. AC Coupled

Ø SFP Module EEPROM Information and Management

The SFP modules implement the 2-wire serial communication protocol as defined in the SFP -8472. The serial ID information of the SFP modules and Digital Diagnostic Monitor parameters can be accessed through the I²C interface at address A0h and A2h. The memory is mapped in Table 1. Detailed ID information (A0h) is listed in Table 2. And the DDM specification at address A2h. For more details of the memory map and byte definitions, please refer to the SFF-8472, “Digital Diagnostic Monitoring Interface for Optical Transceivers”. The DDM parameters have been internally calibrated.