BT-SFP-G05-BU05-55

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BT-SFP-G05-BU05-55 SFP Module

BT-SFP-G05-BU05-55 is a high performance, cost effective modules, which is supporting up to 1.25Gbps, and transmission distance up to 500m on MM fiber. The transceiver consists of two sections: The transmitter section incorporates a laser driver and a 1550nm 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 based 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.

Features

  • Up to 500m transmission on MMF
  • Up to 1.25 Gbps
  • 1550nm FP laser and 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

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

1500

1550

1580

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

Receiver Operating Characteristic-Optical, Electrical

Parameter

Symbol

Min.

Typ.

Max.

Unit

Note

Center Wavelength

λr

1260

1310

1620

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-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 the 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.