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25G 850nm 0.07km MM SFP28 Transceiver

25G 850nm 0.07km MM SFP28 Transceiver

MTRA-3A90A transceiver is a high performance,cost effective modules, which is optimized for 32G Fibre Channel and 25G Ethernet, supporting MAX data-rate of 28.05Gbps, and transmission distance up to 70m on OM3 MMF.
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产品模块: 25G 850nm 0.07km MM SFP28 Transceiver
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Description

MTRA-3A90A transceiver is a high performance, cost effective modules, which is optimized for 32G Fibre Channel and 25G Ethernet, supporting MAX data-rate of 28.05Gbps, and transmission distance up to 70m on OM3 MMF.The transceiver consists of two sections: The transmitter section incorporates an 25G 850nm VCSEL, driver and CDR.. The receiver section consists of a PIN photodiode integrated with a transimpedance preamplifier (TIA),limiting amplifier and CDR. The transceiver is hot pluggable into the 20-pin connector .

The high-speed electrical interface is base on low voltage logic, with nominal 100 Ohms differential impedance and AC coupled in the transceiver. The optical output can be disabled by LVTTL logic high-level input of TX_DIS. 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 data is held in the lower area while specific data is held in a series of tables in the high memory area

 

Features

l Support Data Rate 25Gbps

Built-in CDR

Up to 70m transmission distance on OM3 MMF

850nm VCSEL and PIN receiver

SFI electrical interface

2-wire interface for integrated Digital Diagnostic monitoring

SFP+ MSA package with duplex LC connector

Hot pluggable

Very low EMI and excellent ESD protection

+3.3V power supply

Power consumption less than 1W

Operating case temperature: 0~+70°C

 

Applications

32G Fibre Channel

25G BASE-SR

 

Compliance 

Compliant with SFF-8431

Compliant with FC-PI-6

Compliant with FDA 21 CFR 1040.10 and 1040.11, Class I except for deviations pursuant

RoHS compliance

 

Specification  

Absolute Maximum Ratings 

 

 

 

 

Parameter

Symbol

Min.

Max.

Unit

Storage Temperature

TS 

-40

+85

 

Supply Voltage

VCC3 

0

3.6

V

Relative Humidity(Non-condensing)

RH

5

85

%

RX Input Average Power

Pmax

-

3.4

dBm

 

Recommended Operating Conditions

 

 

 

 

Parameter

Symbol

Min.

Typical 

Max.

Unit

Operating Case Temperature

TC 

0

 

70

 

Power Supply Voltage

VCC3 

3.13

3.3

3.47

V

ICC3 

 

 

288

mA

Power Dissipation

PD 

 

 

1

W

Data Rate

 

 

25.78125

 

Gbps

Transmission Distance(OM3 MMF)

 

 

 

70

 

Transmitter Operating Characteristic-Optical, Electrical 

 

 

 

Parameter

Symbol

Min.

Typical

Max.

Unit

Note

Center Wavelength

λC 

840

850

860

nm

 

RMS Spectral Width

 

 

 

0.6

nm

 

Laser Off Power

Poff

-

-

-30

dBm

 

Average Optical Power

Pavg

-8.4

-

2.4

dBm

 

Optical Modulation Amplitude

OMA

-6.4

 

3

dBm

 

Extinction Ratio

ER

2

-

-

dB

 

Transmitter Dispersion Penalty

TDP

-

-

4.3

dB

 

Optical Return Loss Tolerance

 

-

-

12

dB

 

Optical Eye Mask

 

5

 

 

%

 

Differential input impedance

 

 

100

 

Ω

 

Tx Input Diff Voltage

VI

180

 

700

mV

 

Tx Fault

VoL 

-0.3

 

0.4

V

At 0.7mA

IoH 

-50

 

37.5

uA

Note1

Tx_Disable

VIL 

-0.3

 

0.8

V

 

VIH 

2

 

VCC+0.3

V

 

Notes:

[1] Measured with a 4.7 kΩ load pulled up to Vcc.

 

Receiver Operating Characteristic-Optical, Electrical 

 

 

 

Parameter

Symbol

Min.

Typ.

Max.

Unit

Note

Center Wavelength

λr

840

850

860

nm

 

Receiver Sensitivity (Average Power)

Psens

 

 

-10.3

dBm

Note1

Los Assert

LosA

-30

 

-

dBm

 

Los Dessert

LosD

 

 

-13

dBm

 

Los Hysteresis

LosH

0.5

 

-

dB

 

Overload

Pin

2.4

 

 

dBm

 

Receiver Reflectance

 

 

 

-12

dB

 

Rx Output Diff Voltage

Vo

300

 

900

mV

 

Rx_LOS

VoL 

-0.3

 

0.4

V

At 0.7mA

IoH 

-50

 

37.5

uA

Note2

RS0,RS1

VIL 

-0.3

 

0.8

V

 

VIH 

2

 

VCC+0.3

V

 

Notes:

[1] Receiver sensitivity is informative. shall be measured with conformance test signal for BER =5x 10-5 .  

[2] Measured with a 4.7 kΩ load pulled up to Vcc.  

 

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

 

1

ms

Note4

Tx_Fault Reset

t_reset

10

 

µs

Note5

LOS Assert Time

t_loss_on

 

100

µs

Note6

LOS Deassert Time

t_loss_off

 

100

µs

Note7

Serial ID Clock Rate

f_serial_clock

 

400

kHz

 

Notes:

[1] Time from rising edge of TX Disable to when the optical output falls below 10% of nominal

[2] Time from falling edge of TX Disable to when the modulated optical output rises above 90% of nominal

[3] From power on or negation of TX Fault using TX Disable

[4] Time from fault to TX fault on

[5] Time TX Disable must be held high to reset TX_fault

[6] Time from LOS state to RX LOS assert

[7] Time from non-LOS state to RX LOS deassert.

 

Pin-out Definition

 


Pin Assignment

Pin

Logic

Symbol

Name/Description

Note

1

 

VeeT 

Module Transmitter Ground 

Note1

2

LVTTL-O 

TX_Fault 

Module Transmitter Fault 

Note2

3

LVTTL-I 

TX_Disable 

Transmitter Disable; Turns off transmitter laser output 

Note3

4

LVTTL-I/O 

SDA 

2-wire Serial Interface Data Line (Same as MOD-DEF2 as defined in the INF-8074i) 

Note4

5

LVTTL-I/O 

SCL 

2-wire Serial Interface Clock (Same as MOD-DEF1 as defined in the INF-8074i) 

Note4

6

 

MOD_ABS 

Module Absent, connected to VeeT or VeeR in the module 

Note5

7

LVTTL-I 

RS0 

 

Note6

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) 

Note2

9

LVTTL-I 

RS1 

. 

 

10

 

VeeR

 

Module Receiver Ground 

Note1

11

 

VeeR

 

Module Receiver Ground 

Note1

12

CML-O 

RD- 

Receiver Inverted Data Output 

 

13

CML-O 

RD+ 

Receiver Non-Inverted Data Output 

 

14

 

VeeR 

Module Receiver Ground 

Note1

15

 

VccR 

Module Receiver 3.3 V Supply 

 

16

 

VccT 

Module Transmitter 3.3 V Supply 

 

17

 

VeeT 

Module Transmitter Ground 

Note1

18

CML-I  

TD+ 

Transmitter Non-Inverted Data Input 

 

19

CML-I 

TD- 

Transmitter Inverted Data Input 

 

  20

 

VeeT 

Module Transmitter Ground 

Note1

Notes:

[1] The module signal ground pins, VeeR and VeeT, shall be isolated from the module case.

[2] This pin is an open collector/drain output pin and shall be pulled up with 4.7k-10kohms to Host_Vcc on the host board. Pull ups can be connected to multiple power supplies, however the host board design shall ensure that no module pin has voltage exceeding module VccT/R + 0.5 V.

[3] This pin is an open collector/drain input pin and shall be pulled up with 4.7k-10kohms to VccT in the module.

[4] See sff-8431 4.2 2-wire Electrical Specifications .

[5] This pin shall be pulled up with 4.7k-10kohms to Host_Vcc on the host board.

 

Block Diagram of Transceiver

 

                                                                                                        Figure2

 

Transmitter Section

The transmitter converts 25Gbit/s serial PECL or CML electrical data into serial optical data compliant with the 32GFC and 25G Ethernet.  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 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 Interface Circuit

                                                                 Figure3

  

DimensionsAll dimensions in millimeter

                                            Figure4

                                                              Figure5

 

                                                             Figure6

 
 

                                                               Figure7

 

 Digital Diagnostic Memory Map

 

 

EEPROM Information (A0h)

Addr.

Field Size

Name of Field

Hex

Description

(Bytes)

0

1

Identifer

03

SFP28

1

1

Ext. Identifier

04

SFP function is defined by serial ID only

2

1

Connector

07

LC Connector

3-10

8

Transceiver

00 00 00 00 00 00 00 00

Transceiver Codes

11

1

Encoding

03

NRZ

12

1

BR, Nominal

FF

>25Gb/s

13

1

Rate Identifier

00

Unspecified

14

1

Length (9um) km

00

Transceiver transmit distance

15

1

Length (9um) 100m

00

Transceiver transmit distance

16

1

Length (50um)10m

00

OM2  transmit distance,150m

17

1

Length (62.5um) 10m

00

Transceiver transmit distance

18

1

Length (Copper or

OM4)

0A

OM4  transmit distance,100m

19

1

Length (50um OM3)

07

OM3  transmit distance,70m

20-35

16

Vendor name

48 47 20 47 45 4E 55 49

4E 45 20 20 20 20 20 20

“HG GENUINE” Vendor Name(ASCII)

36

1

Transceiver

02

25G BASE-SR

37-39

3

Vendor OUI

00 00 00

Unspecified

40-55

16

Vendor PN

4D 54 52 41 2D 33 41 39

30 41 20 20 20 20 20 20

“MTRA-3A90A”Part No.(ASCII) 

56-59

4

Vendor rev

31 2E 30 20

“1.0” (ASCII)

60-61

2

Wavelength

03 52

Transceiver wavelength

62

1

Reserved

00

 

63

1

CC_BASE

E0

Check code for Base ID Fields

64-65

2

Options

18 1A

TX_DISABLE, TX_FAULT and Loss of Signal implemented.

66

1

BR,MAX

00

Unspecified

67

1

BR,MIN

00

Unspecified

68-83

16

Vendor SN

SN(Variable)

Serial Number of transceiver(ASCII).

84-91

8

Date code

DC(Variable)

Manufactory Date Code.

92

1

Diagnostic Monitoring

Type

68

Digital diagnostic monitoring implemented, Internally calibrated 

is implemented

93

1

Enhanced Options

F0

Optional Alarm/Warning flags implemented for all monitored

quantities, Optional Soft TX_Disable

control and monitoring implemented,

Optional Soft TX_FAULT monitoring implemented, Optional Soft RX_LOS monitoring implemented

94

1

SFF_8472 Compliance

08

Includes functionality described in

Rev12.0 SFF-8472

95

1

CC_EXT

CS(Variable)

Check sum for Extended ID Field.

96-127

32

Vendor Specific

Read only

Depends on customer information

Filled by zero 

 

Ordering Information

Part No

 

 

 

Specification

 

 

 

Pack

Rate

Tx

Pout

Rx

S

Top

Reach

Others

MTRA-3A90A

SFP+

25G

850nm VCSEL

-8.4 ~ 2.4dBm

PIN

<-10.3dBm

0~70 

70m

DDM/RoHS 

 

Contact Information 

Wuhan Huagong Genuine Optics Technology Co., Ltd

Address: Science & Technology Region of HUST, Donghu High-Tech Zone

Wuhan, Hubei Province, 430223, China

Tel: +86-27-87180102   

Fax: +86-27-87180220

Email: market@genuine-opto.com

 

Statement

HG Genuine possesses the authority for ultimate explanation of all information contained in this document, which is subject to change without prior notice. All the information was obtained in specific environments; and HG Genuine will not be responsible for verifying the products performance in customers’ operating environments, neither liable for the performance of users' products. All information contained is only for the users' reference and shall not be considered as warranted characteristics. HG Genuine will not be liable for damages arising directly or indirectly from any use of the information contained in this document.

Publishing Date: 2016-3-14

Copyright Ó HG Genuine

All Right Reserved