The CSFP-B4312-20Dxx is a compact, hot-pluggable 1.25Gb/s CSFP (Compact Small Form-factor Pluggable) Bi-Directional optical transceiver module designed for Gigabit Ethernet and Fibre Channel applications. It integrates two Bi-Directional transceivers in a single SFP package, utilizing a 1490nm DFB laser transmitter and 1310nm receiver, supporting link distances up to 20km on 9/125um single-mode fiber (G.652).
Available in both commercial (0°C to +70°C) and industrial (-40°C to +85°C) operating temperature options, the module is compliant with CSFP MSA 2.0 (Option 2), SFP MSA SFF-8074i, and RoHS standards. The metal enclosure provides lower EMI, and the single +3.3V power supply simplifies system design.
Product Features
- Two Bi-Directional transceivers in one SFP package
- Up to 1.25Gb/s data links
- Duplex LC connector
- Hot-pluggable SFP footprint
- 1490nm DFB laser transmitter, 1310nm receiver
- RoHS compliant and Lead Free
- Up to 20Km on 9/125um SMF (G.652)
- Metal enclosure for lower EMI
- Single +3.3V power supply
- Compliant with CSFP MSA 2.0 (Option 2)
- Commercial and industrial operating temperature optional
- SFP MSA SFF-8074i Compliant
- Digital Diagnostic Monitoring (DDM) supported
Applications
- Gigabit Ethernet
- Fibre Channel
Regulatory Compliance
- ESD to the Electrical PINs: compatible with MIL-STD-883 Method 3015
- ESD to the Single LC Receptacle: compatible with IEC 61000-4-2
- Immunity compatible with IEC 61000-4-3
- EMI compatible with FCC Part 15 Class B, EN55022 Class B (CISPR 22B), VCCI Class B
- Laser Eye Safety compatible with FDA 21CFR 1040.10 and 1040.11, EN60950, EN (IEC) 60825-1,2
- RoHS compliant with RoHS 2 (2011/65/EU)
Absolute Maximum Ratings
| Parameter | Symbol | Min | Max | Unit |
|---|---|---|---|---|
| Supply Voltage | Vcc | -0.5 | +4.0 | V |
| Storage Temperature | Ts | -40 | +85 | °C |
| Operating Humidity | RH | 0 | 85 | % |
Recommended Operating Conditions
| Parameter | Symbol | Min | Typical | Max | Unit | |
|---|---|---|---|---|---|---|
| Operating Case Temperature | Standard | Tc | 0 | – | +70 | °C |
| Industrial | -40 | – | +85 | °C | ||
| Power Supply Voltage | Vcc | 3.13 | 3.30 | 3.47 | V | |
| Power Supply Current | Icc | – | – | 500 | mA | |
| Data Rate | – | 1.25 | – | Gbps | ||
| 9/125um G.652 SMF | Lmax | – | – | 20 | km |
Optical and Electrical Characteristics
| Parameter | Symbol | Min | Typical | Max | Unit | Notes |
|---|---|---|---|---|---|---|
| Centre Wavelength (Tx) | λc | 1470 | 1490 | 1510 | nm | – |
| Spectral Width (RMS) | Δλ | – | – | 1 | nm | – |
| Side-Mode Suppression Ratio | SMSR | 30 | – | – | dB | – |
| Average Output Power | Pout | -9 | – | -3 | dBm | 1 |
| Extinction Ratio | ER | 6.0 | – | – | dB | – |
| Optical Rise / Fall Time | tr / tf | – | – | 260 | ps | 2 |
| Centre Wavelength (Rx) | λc | 1260 | 1310 | 1360 | nm | – |
| Receiver Sensitivity | – | – | – | -22.5 | dBm | 3, 4 |
| Receiver Overload | – | -3 | – | – | dBm | – |
| LOS De-Assert | LOSD | – | – | -25 | dBm | – |
| LOS Assert | LOSA | -40 | – | – | dBm | – |
| LOS Hysteresis | – | 0.5 | – | 5 | dB | – |
| LOS High | – | 2.0 | – | Vcc | V | – |
| LOS Low | – | – | – | 0.8 | V | – |
Diagnostics
| Parameter | Range | Unit | Accuracy | Calibration |
|---|---|---|---|---|
| Temperature (Standard) | 0 to +70 | °C | ±3°C | Internal |
| Temperature (Industrial) | -40 to +85 | °C | ±3°C | Internal |
| Voltage | 2.97 to 3.63 | V | ±3% | Internal |
| Bias Current | 0 to 100 | mA | ±10% | Internal |
| TX Power | -9 to -3 | dBm | ±3dB | Internal |
| RX Power | -22.5 to -3 | dBm | ±3dB | Internal |
Pin Descriptions
| Pin | Signal Name | Description |
|---|---|---|
| 1 | VeeT | Transmitter Ground |
| 2 | TX Fault | Transmitter Fault |
| 3 | TX1_Disable | Transmitter Disable of Ch1 |
| 4 | MOD_DEF(2) | 2-wire Serial Interface Data (SDA) |
| 5 | MOD_DEF(1) | 2-wire Serial Interface Clock (SCL) |
| 6 | TD2- | Inverted Transmit Data Input of Ch2 |
| 7 | TD2+ | Transmit Data Input of Ch2 |
| 8 | LOS1 | Loss of signal for Ch1 |
| 9 | RD2+ | Received Data Output of Ch2 |
| 10 | RD2- | Inverted Received Data Output of Ch2 |
| 11 | VeeT | Transmitter Ground |
| 12 | RD1- | Inverted Received Data Output of Ch1 |
| 13 | RD1+ | Received Data Output of Ch1 |
| 14 | LOS2 | Loss of signal for Ch2 |
| 15 | VccR | Receiver Power Supply |
| 16 | VccT | Transmitter Power Supply |
| 17 | TX2_Disable | Transmitter Disable of Ch2 |
| 18 | TD1+ | Transmit Data Input of Ch1 |
| 19 | TD1- | Inverted Transmit Data Input of Ch1 |
| 20 | VeeT | Transmitter Ground |
Ordering Information
| Part Number | Product Description |
|---|---|
| CSFP-B4312-20D | 1490T/1310R 1.25Gbps LC 20km 0°C~+70°C with DDM |
| CSFP-B4312-20DI | 1490T/1310R 1.25Gbps LC 20km -40°C~+85°C with DDM |
Notes
- Class 1 Laser Safety.
- Unfiltered, 20-80%. Complies with Gigabit Ethernet eye masks when filtered.
- Measured with conformance signals defined in FC-PI-2 Rev. 10.0 specifications.
- Measured with PRBS 2^7-1 at 10^-12 BER.
EEPROM Information
Memory map for 2ch Compact SFP (option 2):
- A0h (1010000X): Serial ID address for Channel 1
- A2h (1010001X): Digital Diagnostic address for Channel 1
- B0h (1011000X): Serial ID address for Channel 2
- B2h (1011001X): Digital Diagnostic address for Channel 2
Note: TX_Fault is internally OR output for TX fault conditions in either Channel 1 or Channel 2. In order to determine which channel is at fault, the Host can read the internal memory bits.
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Important Notice
Performance figures, data and any illustrative material provided in this data sheet are typical and must be specifically confirmed in writing by F-tone Networks before they become applicable to any particular order or contract. In accordance with the F-tone Networks policy of continuous improvement specifications may change without notice. The publication of information in this data sheet does not imply freedom from patent or other protective rights of F-tone Networks or others. Further details are available from any F-tone Networks sales representative.
