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BT-SFP-G05-BX05-31 SFP Module

BT-SFP-G05-BX05-31 SFP Module

BT-SFP-G05-BX05-31 is a high performance, cost effective modules, which is supporting up to 1.25Gbps, and transmission distance up to 3km on MM fiber. The transceiver consists of two sections: The transmitter section incorporates a laser driver and a 1310nm FP laser. The receiver section consists of a PIN photodiode integrated with a transimpedance preamplifier (TIA) and a Limitting Amplifier. The module is hot pluggable into the 20-pin connector. The high-speed electrical interface is base on low voltage logic, with nominal 100Ohms differential impedance and AC coupled in the module.
The optical output can be disabled by LVTTL logic high-level input of TX_DIS. Transmit Fault (Tx_Fault) is provided to indicate that the module transmitter has detected a fault condition related to laser operation or safety. Loss of signal (RX_LOS) output is provided to indicate the loss of an input optical signal of receiver. A serial EEPROM in the transceiver allows the user to access transceiver monitoring and configuration data via the 2-wire SFP Management Interface. This interface uses a single address, A0h, with a memory map divided into a lower and upper area. Basic digital diagnostic (DD) data is held in the lower area while specific data is held in a series of tables in the high memory area.

Category:

Features

Features

  • Up to 500m transmission on MMF
  • Up to1.25 Gbps
  • 1310nm FP laser and 1550nm PIN receiver
  • Single LC/SC receptacle optical interface compliant
  • 2-wire interface for integrated Digital Diagnostic monitoring
  • Hot pluggable
  • Very low EMI and excellent ESD protection
  • +3.3V power supply
  • Power consumption less than 1.0W
  • Operating case temperature: 0~+70°C

Applications

  • High-speed storage area networks
  • Computer cluster cross-connect
  • Custom high-speed data pipes

Compliance

  • Compliant with IEEE802.3ah 1000Base-BX
  • Compliant with MSA SFF-8472
  • Compliant with SFP MSA

Specification

Specification

Absolute Maximum Ratings
Parameter Symbol Min. Max. Unit Notes
Storage Temperature TS -40 +85 ℃
Supply Voltage VCC3 0 3.6 V
Relative Humidity RH 5 +85 % Note1
Rx Input Average Power Pmax – +1 dBm

Notes:

  • Non-condensing

 

Recommended Operating Conditions
Parameter Symbol Min. Typical Max. Unit
Operating Case Temperature TC 0 25 +70 ℃
Power Supply Voltage VCC3 3.13 3.3 3.47 V
Total Supply Current ICC3 – – 300 mA
Power Dissipation PD – – 1.0 W
Data Rate 1.25 Gbps

 

 

Transmitter Operating Characteristic-Optical, Electrical
Parameter Symbol Min. Typical Max. Unit Note
Centre Wavelength λC 1260 1310 1360 nm
Spectral Width Δλ 4 nm FP (RMS)
Average Optical Power Pavg -9 – -3 dBm MMF
Laser Off Power Poff – – -40 dBm
Extinction Ratio ER 8.2 – – dB
Operating Data Rate – 1.25 – Gbps
Optical Eye Mask Compliant with 802.3ah eye masks when filtered
Tx Input Diff. Voltage VI 500 – 2400 mV
Tx Fault Output Voltage — Low VoL -0.3 – 0.4 V
Tx Fault Output Voltage — High VoH 2.4 – Vcc+0.3 V

 

Receiver Operating Characteristic-Optical, Electrical
Parameter Symbol Min. Typ. Max. Unit Note
Center Wavelength λr 1500 1550 1580 nm
Receive Sensitivity In Average Power Psen – – -21 dBm
Los Assert LosA -35 – – dBm
Los Dessert LosD – – -22 dBm
Los Hysteresis LosH 0.5 – -6 dB
Overload Pin – – -3 dBm
Rx Output Diff Voltage Vo 370 – 2000 mV
Operating Data Rate – – 1.25 – Gbps

 

Digital Diagnostic Functions
Parameter Symbol Min. Max. Unit Note
Temperature monitor absolute error DMI_Temp -3 3 ℃ Over operating temp
Laser power monitor absolute error DMI_TX -3 3 dB
RX power monitor absolute error DMI_RX -3 3 dB
Supply voltage monitor absolute error DMI_VCC -3% +-3% V
Bias current monitor absolute error DMI_Ibias -10% 10% mA

 

Control and Status I/O Timing Characteristics
Parameter Symbol Min. Max. Unit Note
TX Disable Assert Time t_off – 100 µs Note1
TX Disable Negate Time t_on – 2 ms Note2
Time to initialize including reset of TX_Fault t_init – 300 ms Note3
TX Fault Assert Time t_fault_on – 1 ms Note4
TX Fault Reset Time t_reset 10 – µs Note5
LOS Assert Time t_loss_on – 100 µs Note6
LOS Deassert Time t_loss_off – 100 µs Note7

Notes:

  • Time from rising edge of TX Disable to when the optical output falls below 10% of nominal
  • Time from falling edge of TX Disable to when the modulated optical output rises above 90% of nominal
  • From power on or negation of TX Fault using TX Disable
  • Time from fault to TX fault on
  • Time from TX fault to TX nominal
  • Time from LOS state to RX LOS assert
  • Time from non-LOS state to RX LOS

Pin Assignment

Pin-out Definition

Pin Assignment

Pin Logic Symbol Name/Description Note
1 VeeT Module Transmitter Ground
2 LVTTL-O TX_Fault Module Transmitter Fault
3 LVTTL-I TX_Disable Transmitter Disable; Turns off transmitter laser output
4 LVTTL-I/O SDA 2-wire Serial Interface Data Line (Same as MOD-DEF2 as defined in the INF-8074i)
5 LVTTL-I/O SCL 2-wire Serial Interface Clock (Same as MOD-DEF1 as defined in the INF-8074i)
6 MOD_ABS Module Absent, connected to VeeT or VeeR in the module
7 LVTTL-I RS0 Not used
8 LVTTL-O RX_LOS Receiver Loss of Signal Indication (In FC designated as RX_LOS, in SONET designated as LOS, and in Ethernet designated at Signal Detect)
9 LVTTL-I RS1 Not used
10 VeeR Module Receiver Ground
11 VeeR Module Receiver Ground
12 CML-O RD- Receiver Inverted Data Output
13 CML-O RD+ Receiver Non-Inverted Data Output
14 VeeR Module Receiver Ground
15 VccR Module Receiver 3.3 V Supply
16 VccT Module Transmitter 3.3 V Supply
17 VeeT Module Transmitter Ground
18 CML-I TD+ Transmitter Non-Inverted Data Input
19 CML-I TD- Transmitter Inverted Data Input
20 VeeT Module Transmitter Ground

 

Block Diagram of Transceiver

Transmitter Section

The transmitter converts 1.25Gbit/s serial PECL or CML electrical data into serial optical data compliant with 1000BASE-LX standard. An open collector compatible Transmit Disable (Tx_Dis) is provided. A logic “1,” or no connection on this pin will disable the laser from transmitting.   A logic “0” on this pin provides normal operation. The transmitter has an internal automatic power control loop (APC) to ensure constant optical power output across supply voltage and temperature variations. An open collector compatible Transmit Fault (Tx_Fault) is provided. TX_Fault is a module output contact that when high, indicates that the module transmitter has detected a fault condition related to laser operation or safety. The TX_Fault output contact is an open drain/collector and shall be pulled up to the Vcc_Host in the host with a resistor in the range 4.7-10 kΩ. TX_Disable is a module input contact. When TX_Disable is asserted high or left open, the SFP module transmitter output shall be turned off. This contact shall be pulled up to VccT with a 4.7 kΩ to 10 kΩ resistor

 

Receiver Section

The receiver converts 1.25Gbit/s serial optical data into serial PECL/CML electrical data. An open collector compatible Loss of Signal is provided. Rx_LOS when high indicates an optical signal level below that specified in the relevant standard. The Rx_LOS contact is an open drain/collector output and shall be pulled up to Vcc_Host in the host with a resistor in the range 4.7-10 kΩ, or with an active termination. Power supply filtering is recommended for both the transmitter and receiver. The Rx_LOS signal is intended as a preliminary indication to the system in which the SFP is installed that the received signal strength is below the specified range. Such an indication typically points to non-installed cables, broken cables, or a disabled, failing or a powered off transmitter at the far end of the cable.

Recommended Circuit

Recommended Interface Circuit

 

Dimensions            Unit:mm

LC Receptacle

 

SC Receptacle

Digital Diagnostic Memory Map

Notice

Performance figures, data and any illustrative material provided in this data sheet are typical and must be specifically confirmed in writing by Born before they become applicable to any particular order or contract. In accordance with the Born 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 Born or others. Further details are available from any Born sales representative.

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