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25G 1310nm 10km SM SFP28 Transceiver

25G 1310nm 10km SM SFP28 Transceiver

MTRA-3E30A is a high performance, cost effective modules, which is supporting Multi Rate 9.953-25.78Gbps, and transmission distance up to 10km on SM fiber. The transceiver consists of two sections: The transmitter section incorporates a 1310nm DFB Laser,
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产品模块: 25G 1310nm 10km SM SFP28 Transceiver
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Description

MTRA-3E30A is a high performance, cost effective modules, which is supporting Multi Rate 9.953-25.78Gbps, and transmission distance up to 10km on SM fiber. The transceiver consists of two sections: The transmitter section incorporates a 1310nm DFB Laser, a driver and a CDR. The receiver section consists of a PIN photodiode integrated with a transimpedance preamplifier (TIA), a Limitting Amplifier and CDR. The module 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 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. Digital diagnostics function are available via a 2-wire serial interface, as specified in SFF-8472.

 

Features

Up to 10KM transmission distance

Support Multi Rate 9.953-25.78Gbps

1310nm DFB and PIN receiver

SFI electrical interface

2-wire interface for integrated Digital Diagnostic  monitoring

SFP+ MSA package with duplex LC connector

H ot pluggable

Very low EMI and excellent ESD protection

+3.3V power supply

Power consumption less than 1.5W

Operating case temperature: 0~70°C

 

 Applications   

25Gbps Ethernet

Compliance   

Compliant with IEEE 802.3-2012

Compliant with FCC 47 CFR Part 15, Class B

Compliant with MSA SFF-8472

l Compliant with MSA SFF-8431

 

Specification

Absolute Maximum Ratings 

 

 

 

 

Parameter

Symbol

Min.

Max.

Unit

Storage Temperature

TS 

-40

85

 

Supply Voltageno damaged 

VCC3 

-0.5

3.6

V

Relative Humidity(non-condensing)

RH

5

95

%

RX Input OMA Power

Pmax

 

5

dBm

 

Recommended Operating Conditions

 

 

 

 

Parameter

Symbol

Min.

Typical 

Max.

Unit

Operating Case Temperature

TC 

0

25

70

 

Power Supply Voltage

VCC3 

3.135

3.3

3.465

V

ICC3 

 

 

400

mA

Power Dissipation

PD 

 

1.2

1.5

W

Data Rate(NRZ)

 

24.33

25.78

 

Gbps

Transmission Distance

 

 

 

10

Km

 

 

Transmitter Operating Characteristic-Optical, Electrical 

 

 

Parameter

Symbol

Min.

Typical

Max.

Unit

Note

Centre Wavelength

λC 

1290

1310

1325

nm

 

Side Mode Suppression Ratio  

SMSR

30

 

 

dB

 

Laser Off Power

Poff

 

 

-30

dBm

 

Average Optical Power

Pavg

-4.5

 

4.5

dBm

 

Extinction Ratio

ER

4

 

 

dB

 

Transmitter Dispersion Penalty

 

 

 

2.7

dB

 

Relative Intensity Noise

Rin

 

 

-130

dB/Hz

 

Optical Return Loss Tolerance

 

12

 

 

dB

 

Operating Data Rate

 

24.33

25.78

 

Gbps

Note1

Optical Eye Mask

>5% (Compatible 100GBASE-LR4)

 

Note 2

Common mode voltage tolerance

 

15

 

 

mV

 

Tx Input Diff Voltage

VI

200

500

900

mV

 

Tx Fault

VOL

 

 

0.4

V

At 0.7mA

Note3

VOH

VccT-0.4

 

 

 

Notes:

[1]Under CDR bypass mode, CPRI option 7 compatibility

[2] 1000 consecutive snapshots at typical rate and room temperature

[3] Measured with a 4.7k Ohm load pulled up to Vcc

 

Receiver Operating Characteristic-Optical, Electrical 

 

 

 

 

Parameter

Symbol

Min.

Typ.

Max.

Unit

Note

Center Wavelength

λr

1260

1310

1360

nm

 

Receiver Sensitivity(OMA)

 

 

 

-14

dBm

Note 1

LOS Assert

LosA

-30

 

 

dBm

 

LOS Dessert

LosD

 

 

-13

dBm

 

LOS Hysteresis

LosH

0.5

 

 

dB

 

Overload(OMA) 

Pin

4.5

 

 

dBm

 

Receiver Reflectance

 

 

 

-26

dB

 

Operating Data Rate

 

24.33

25.78

 

Gbps

Note 2

Rx Output Diff Voltage

Vo

 

500

900

mV

 

Rx Output Rise and Fall Time

Tr/Tf

9.5

 

 

ps

20% to 80%

Notes:

[1] Measured with 25.78125Gb/s, PRBS-31 NRZ, ER>4dB, 1260~1360nm, BER 5E-5

[2]Under CDR bypass mode, CPRI option 7 compatibility

 

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 Disable to reset

t_reset

10

 

µs

Note5

LOS Assert Time

t_loss_on

 

100

µs

Note6

LOS Deassert Time

t_loss_off

 

100

µs

Note7

Rate-Select Change Time

t_ratesel

 

10

µs

Note8

Serial ID Clock Rate

f_serial_clock

0.001

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.

[8] Time from rising or falling edge of Rate Select input until receiver bandwidth is in conformance with appropriate specification

 

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 

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) 

Note2

9

LVTTL-I 

RS1 

Not used 

 

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

 

 

 

Transmitter Section

The transmitter converts 25.78Gbit/s serial PECL or CML electrical data into serial optical data compliant with the 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. Per the requirements of performance, internal clock and data recovery circuits (CDR) are present on electrical input of this transceiver module.. 

Receiver Section

The receiver converts 25.78Gbit/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. 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. Per the requirements of performance, internal clock and data recovery circuits (CDR) are present on electrical output of this transceiver module. 

 

TX Equalization Control

Tx input equalization control can be accessed through 2-wire serial interface at byte address 114(A2h). Tx input equalization control for 25GE is located at the upper 4 bits of byte 114 (A2h).

 

RX Emphasis Control

Rx output emphasis control can be accessed through 2-wire serial interface at byte address 115(A2h). Rx output emphasis control for 25GE is located at the upper 4 bits of byte 115 (A2h).

 

Recommended Interface Circuit

 

Figure3

 

 

Digital Diagnostic Memory Map

 

EEPROM Information (A0h)

Serial ID Memory Contents(A0h)

Addr.

Field Size

Name of Field

Hex

Description

(Bytes)

0

1

Identifer

03

SFP

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

10G Ethernet Compliance Codes:

10G Base-LR

11

1

Encoding

03

NRZ

12

1

BR, Nominal

FF

 255*100MBd

13

1

Rate Identifier

00

Unspecified

14

1

Length (9um) km

0A

Transceiver transmit distance,10km

15

1

Length (9um) 100m

00

Transceiver transmit distance,100*100m

16

1

Length (50um)10m

00

Transceiver transmit distance

17

1

Length (62.5um) 10m

00

Transceiver transmit distance

18

1

Length (Copper)

00

Not compliant

19

1

Length (50um OM3)

00

Not compliant

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

Reserved

03

100GBASE-LR4

37-39

3

Vendor OUI

00 00 00

 

40-55

16

Vendor PN

4D 54 52 41 2D 33 45 33

“MTRA-3E30A”Part No.(ASCII) 

 

 

 

30 41 20 20 20 20 20 20

 

56-59

4

Vendor rev

31 2E 30 20

“1.0” (ASCII)

60-61

2

Wavelength

05 1E

Transceiver wavelength

62

1

Reserved

00

 

63

1

CC_BASE

A6  

Check code for Base ID Fields

64-65

2

Options

0A 1A

a conventional uncooled laser Power Level 2 a conventional limiting output the transceiver has an internal retimer or CDR TX_DISABLE

TX_FAULT

Rx_LOS

66

1

BR,MAX

00

Not Specified

67

1

BR,MIN

00

Not Specified

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

B0

Alarm/warning flags soft TX_FAULT soft RX_LOS

94

1

SFF_8472 Compliance

08

Includes functionality described in

Rev12.0 SFF-8472

95

1

CC_EXT

CF(Variable)

Check sum for Extended ID Field.

96-127

32

Vendor Specific

Read only

Depends on customer information

Filled by zero

128-255

128

Reserved

Read only

Filled by zero

 

Ordering Information

Part No.

 

Specification

 

 

 

Pack

Rate

Tx

Pout

Rx

Sens.

Top

Reach

Others

  MTRA-3E30A

SFP28

25.78Gbps

1310nm DFB

-4.5~4.5 dBm

PIN

-14dBm

 070

10km

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.