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1.25G CSFP Transceiver (WT-CFP-134/43)

型号: WT-CFP-134/43


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 1.25G CSFP Transceiver (WT-CFP-134/43)

Dual channel LC, +3.3V, 20km

1310/1490nm, FP/DFB-LD, Single-Mode, DDM

 

Features: 

l         1250Mbps Typical Data Rate and compliant to 1000Base BX20 IEEE802.3ah

l         1310nm FP laser transmitter for UCFP-134

1490nm DFB laser transmitter for UCFP-143

l         PIN photo-detector

l         Up to 20km on 9/125µm SMF

l         Hot-pluggable CSFP footprint

l         LC/UPC type pluggable optical interface

l         Achieve operational compatibility with conventional SFP

l         Metal enclosure, for lower EMI

l         RoHS compliant and lead-free

l         Single +3.3V power supply

l         Support Digital Diagnostic Monitoring interface

l         Compliant with SFF-8472

l         Case operating temperature: Industrial / Commercial optional, 0°C to +70°C / -40°C to +85°C

 

Applications:

l         Gigabit Ethernet(1000BASE-BX20)

l         Point to Point FTTH Application

l         Switched Backplane Applications

l         Router/Server Interface

l         Switch to Switch Interface

 

 

 

Description:

The WT-CSFP-134/43 CSFP transceivers are compatible with the Compact Small Form- Factor Pluggable (CSFP) Multi-Source Agreement (MSA) option 2, The transceiver consists of 2-channel Bi-directional Optical Transceiver unit with five sections: the LD driver, the limiting amplifier, the digital diagnostic monitor, the 1310nm FP laser (the 1490nm DFB laser) and the PIN photo-detector .The module data link up to 20KM in 9/125um single mode fiber.

 

The optical output can be disabled by a TTL logic high-level input of Tx Disable, and the system also can disable the module via I2C. Tx Fault is provided to indicate that degradation of the laser. Loss of signal (LOS) output is provided to indicate the loss of an input optical signal of receiver or the link status with partner. The system can also get the LOS (or Link)/Disable/Fault information via I2C register access.

 

Conventional SFP will function when plugged into a C-SFP socket, at the same time no damage to C-SFP and host board if C-SFP module is plugged into a conventional SFP socket

 

.  Pin Descriptions

 

Pin#

Name

Function

Notes

1

VEE

Transceiver Ground

VEE may be internally connected within the SFP module

2

TX FAULT

Transmitter Fault Indication

TX Fault is an open collector/drain output, which should be pulled up with a 4.7K–10K resistor on the host board. Note 1 for more information

3

TX1_ Disable

Transmitter Disable of Ch A

Module channel A disables function

4

MOD-DEF2

Two-wires interface Data

2 wire serial ID interface, SDA

5

MOD-DEF1

Two-wires interface Clock

2 wire serial ID interface, SCL

6

TD2-

Inverted Transmit Data Input of Ch B

These are the differential transmitter puts. They are AC-coupled, differential lines with 100 differential termination inside the module. The AC coupling is done inside the module and is thus not required on the host board

7

TD2+

Transmit Data Input of Ch B

8

LOS1

Loss of  Signal of Ch A

Loss of Signal detected function. Note 2 for more information.

9

RD2+

Received Data Output of  Ch B

These are the differential receiver outputs. They are AC coupled 100 differential lines which should be terminated with 100(differential) at the user SERDES. The AC coupling is done inside the module and is thus not required on the host board.

10

RD2-

Inverted  Received  Data  Output of Ch B

11

VEE

Transceiver Ground

VEE may be internally connected within the SFP module.

12

RD1-

Inverted  Received  Data  Output of  Ch A

These are the differential receiver outputs. They are AC coupled 100 differential lines which should be terminated with 100(differential) at the user SERDES. The AC coupling is done inside the module and is thus not required on the host board.

13

RD1+

Received Data Output of  Ch A

14

LOS2

Loss of Signal of CH B

Loss of Signal detected function. Note 2 for more information.

15

VCCR

Receiver Power

3.3V± 5%. Note 3 for more information

16

VCCT

Transmitter Power

3.3V± 5%. Note 3 for more information

17

TX2_ Disable

Transmitter Disable of  Ch B

Module channel B disables function

18

TD1+

Transmit Data Input of  Ch A

These are the differential transmitter puts. They are AC-coupled, differential lines with 100 differential termination inside the module. The AC coupling is done inside the module and is thus not required on the host board

19

TD1-

Inverted  Transmit Data Input of Ch A

20

VEE

Transceiver Ground

VEE may be internally connected within the SFP module.

 

 

 

Note 1: When high, output indicates a laser fault of some kind either in Channel A or Channel B. The Host shall  read Channel A/B for details: TX Fault  from  channel A  if bit 2  is  set  in  [A2H:110]; TX Fault  from channel B if bit 2 is set in [B2H: 110]. Low indicates normal operation. In the low state, the output will be pulled to < 0.8V.

Note 2: When high, this output indicates the received optical power is below the worst-case receiver sensitivity (as defined by the standard in use). Low indicates normal operation. In the low state, the output will be pulled

to < 0.4V.

Note 3: VccT VccR are the power supplies. They are defined as 3.3V ±5% at the SFP connector pin. Maximum supply current is 400Ma@3.3V. Vcc may be internally connected within the SFP transceiver module.

 

 

Figure 2: Pin out of Connector Block on Host Board

 

 

 

II. Absolute Maximum Ratings

Parameter

Symbol

Min.

Typ.

Max.

Unit

Note

Storage Temperature

Ts

-40

 

85

ºC

 

Relative Humidity

RH

5

 

95

%

 

Power Supply Voltage

VCC

-0.5

 

4

V

 

Signal Input Voltage

 

-0.3

 

Vcc+0.3

V

 

Receiver Damage Threshold

 

3

 

 

dBm

 

 

III. Recommended Operating Conditions

Parameter

Symbol

Min.

Typ.

Max.

Unit

Note

Case Operating Temperature

Tcase

0

 

70

ºC

 

Power Supply Voltage

VCC

3.13

3.3

3.47

V

 

Power Supply Current

ICC

 

 

450

mA

 

Power Supply Noise Rejection

 

 

 

100

mVp-p

100Hz to 1MHz

Data Rate

 

 

1.25/1.25

 

Gbps

TX Rate/RX Rate

Transmission Distance

 

 

 

 20

KM

 

Coupled Fiber

Single mode fiber

9/125um SMF

 

 

.  Specification of Transmitter

 

Parameter

Symbol

Min.

Typ.

Max.

Unit

Note

Average Output Power

POUT

-9

 

-3

dBm

Note (1)

Extinction Ratio

ER

9

 

 

dB

 

Center Wavelength

λC

1260

1310

1360

nm

UCFP-134

1480

1490

1500

UCFP-143

Spectrum Width (RMS)

σ

 

 

3.5

nm

FP Laser

(TX:1310nm)

Side Mode Suppression Ratio

SMSR

30

 

 

dB

DFB Laser

(TX:1490nm)

Spectrum Bandwidth(-20dB)

σ

 

 

1

nm

Transmitter OFF Output Power

POff

 

 

-45

dBm

 

Differential Line Input Impedance

RIN

90

100

110

Ohm

 

Output Eye Mask

Compliant with IEEE802.3 ah (class 1 laser safety)

 

Note (2)

 

Note (1): Measure at 2^7-1 NRZ PRBS pattern

Note (2): Transmitter eye mask definition, and eye mask diagram with at least 10% margin.

 

V.  Specification of Receiver

Parameter

Symbol

Min.

Typ.

Max.

Unit

Note

Input Optical Wavelength

λIN

1480

1490

1500

nm

UCFP-134

1260

1310

1360

UCFP-143

Receiver Sensitivity

PIN

 

 

-19.5

dBm

Note (1)

Input Saturation Power (Overload)

PSAT

-3

 

 

dBm

 

Los Of Signal Assert

PA

-35

 

 

dBm

 

Los Of Signal De-assert 

PD

 

 

-22

dBm

Note (2)

LOS Hysteresis 

PA-PD

 0.5

2

6

dB

 

 

Note (1): Measured with Light source 1490nm(1310nm), ER=9dB; BER =<10^-12 @PRBS=2^7-1 NRZ

Note (2): When LOS de-asserted, the RX data+/- output is signal output.

 

VI.  Electrical Interface Characteristics

Parameter

Symbol

Min.

Typ.

Max.

Unit

Note

Transmitter

Total Supply Current

ICC

 

 

A

mA

Note (1)

Transmitter Disable Input-High 

VDISH

2

 

Vcc+0.3

V

 

Transmitter Disable Input-Low

VDISL

0

 

0.8

V

 

Transmitter Fault Input-High

VTxFH

2

 

Vcc+0.3

V

 

Transmitter Fault Input-Low

VTxFL

0

 

0.8

V

 

Receiver

Total Supply Current

ICC

 

 

B

mA

Note (1)

LOSS Output Voltage-High

VLOSH

 2

 

Vcc+0.3

V

LVTTL

LOSS Output Voltage-Low

VLOSL

 0

 

0.8

V

 

Note (1): A (TX) + B (RX) = 450mA    (Not include termination circuit)


VII. Digital Diagnostic Functions

Wintop WT-CFP-134/43 transceivers support the 2-wire serial communication protocol as defined in the CSFP MSA. It is very closely related to the E2PROM defined in the GBIC standard, with the same electrical specifications.

The standard CSFP serial ID provides access to identification information that describes the transceiver’s capabilities, standard interfaces, manufacturer, and other information.

      Additionally, Wintop CSFP transceivers provide 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, 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 CSFP MSA defines a 256-byte memory map in E2PROM that is accessible over a 2-wire serial interface at the 8 bit address 1010000X (A0h) or 1011000X(B0h). The digital diagnostic monitoring interface makes use of the 8 bit address 1010001X (A2h) or 1011001X(B2h), so the originally defined serial ID memory map remains unchanged. The digital diagnostic memory is defined as follow:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The operating and diagnostics information is monitored and reported by a Digital Diagnostics Transceiver Controller (DDTC) inside the transceiver, which is accessed through a 2-wire serial interface.      When the serial protocol is activated, the serial clock signal (SCL, Mod Def 1) is generated by the host.  The positive edge clocks data into the SFP transceiver into those segments of the E2PROM that are not write-protected. The negative edge clocks data from the SFP transceiver. The serial data signal (SDA, Mod Def 2) is bi-directional for serial data transfer. The host uses SDA in conjunction with SCL to mark the start and end of serial protocol activation. The memories are organized as a series of 8-bit data words that can be addressed individually or sequentially.

Digital diagnostics for the WT-CFP-134/43 are internally calibrated by default.

 

VIII. Recommend Circuit Diagram

     Note1Recommendation 100Ω series resistance on host board.

 

IX.  Mechanical Specifications (Unit: mm)

Ordering Information

PN

Data Rate

Wavelength

Fiber Type

Distance

WT-CFP-134

1.25Gbps

1310Tx/1490Rx

SMF

20km

WT-CFP-143

1.25Gbps

1490Tx/1310Rx

SMF

20km

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