Features

Up to 25.78125Gb/s data links

Monolithically integrated full C-band tunable transmitter and APD receiver

50 GHz ITU channel spacing with integrated wavelength locker

Up to 15km on 9/125µm SMF

Smart Features: Self-Negotiation, Remote DDM, Remote WL Locking

Hot-pluggable SFP+ footprint

Duplex LC/UPC type pluggable optical interface

RoHS-10 compliant and lead-free

Support Digital Monitoring interface

Single +3.3V power supply

Compliant with SFF+MSA and SFF-8472, SFF-8431, SFF-8690 and G.698.1

Metal enclosure, for lower EMI

Meet ESD requirements, resist 8KV direct contact voltage

Case operating temperature Commercial: 0 ~ +70oC Extended: -20 ~ +85oC Industrial: -40 ~ +85oC

Applications

CPRI 9.8304Gb/s, 10.1376Gb/s, 24.33024Gb/s

Ethernet 10.3125Gb/s, 25.78125Gb/s

Wavelength Selection: C-band λc Wavelength Guide Pin Descriptions

Absolute Maximum Ratings

It has to be noted that the operation in excess of any individual absolute maximum ratings might cause permanent damage to this module.

Recommended Operating Conditions

General Description

25G tunable transceiver is an integrated fiber optic transceiver that provides a high-speed serial link at signaling rates from 9.8304 Gb/s to 25.78125 Gb/s. The module complies with the Enhanced Small Form Factor Pluggable （SFP+）multisource agreement-MSA（SFF-8431） and

SFF-8432，SFF-8690，SFF-8472. It complies with the ITU-T G.698.1 standard with 100 GHz channel spacing for CPRI and Ethernet applications.

The transceiver integrates the receiver and transmitter path on one module. The transceiver contains a C-band-tunable integrated Mach-Zehnder (MZ) laser, enabling data transmission over single- mode fiber through an industry-standard LC connector. On the receiver side, the 25 G/bps data stream is recovered from a trans-impedance amplifier, and passed to an output driver. This module features a hot-pluggable electrical interface.

the transceiver provides a unique enhanced digital diagnostic monitoring interface, which allows real-time access to device operating parameters such as transceiver temperature, laser bias current, transmitted optical power, and received optical power and transceiver supply voltage. It also defines a sophisticated system of alarm and warning flags, which alerts end-users when particular operating parameters are outside of a factory set normal range.

The SFP+ MSA defines a 256-byte memory map in EEPROM that is accessible over a 2-wire serial interface at the 8bit address 1010000X (A0h). The digital diagnostic monitoring interface makes use of the 8bit address 1010001X (A2h), so the originally defined serial ID memory map remains unchanged.

Pin Assignment and Pin Description

Figure1. Diagram of host board connector block pin numbers and names

Notes:

1.  Circuit ground is internally isolated from chassis ground.

2.  TFAULT is an open collector/drain output, which should be pulled up with a 4.7kΩ-10kΩ resistor on the host board if intended for use. Pull up voltage should be between 2.0V to Vcc + 0.3V.A high output indicates a transmitter fault caused by either the TX bias current or the TX output power exceeding the preset alarm thresholds. A low output indicates normal operation. In the low state, the output is pulled to

<0.8V.

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

4.  Should be pulled up with 4.7kΩ-10kΩ on host board to a voltage between 2.0V and 3.6V. MOD_ABS pulls line low to indicate module is plugged in.

5.  Internally pulled down per SFF-8431 Rev 4.1.

6.   LOS is open collector output. It should be pulled up with 4.7kΩ-10kΩ on host board to a voltage between 2.0V and 3.6V. Logic 0 indicates normal operation; logic 1 indicates loss of signal.

Electrical Characteristics

The following electrical characteristics are defined over the Recommended Operating Environment unless otherwise specified.

Notes:

1.  Connected directly to TX data input pins. AC coupled thereafter.

2.  Or open circuit.

3.  Input 100 ohms differential termination.

4.  These are unfiltered 20-80% values.

5.  Loss of Signal is LVTTL. Logic 0 indicates normal operation; logic 1 indicates no signal detected.

Receiver sensitivity is compliant with power supply sinusoidal modulation of 20 Hz to 1.5 MHz up to specified value applied through the recommended power supply filtering network.

Optical Characteristics

The following optical characteristics are defined over the Recommended Operating Environment unless otherwise specified.

Notes:

1.  λc refer to wavelength selection, and corresponds to approximately 0.4 nm.

2.  Class 1 Laser Safety per FDA/CDRH and IEC-825-1 regulations.

3.  Measured with Light source 1529.16~1567.13nm, Data rate 25.78125Gb/s, ER>6dB; BER≤5E-5 @PRBS=2³¹ -1 NRZ.

4.   

Digital Diagnostic Functions

The following digital diagnostic characteristics are defined over the Recommended Operating Environment unless otherwise specified. It is compliant to SFF-8472 Rev10.2 with internal calibration mode. For external calibration mode please contact our sales staff.

Mechanical Dimensions

Figure2. Mechanical Outline

Ordering Information

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