2.5G SFP Transceiver with DDM/DOM Optional

The ZGSPXX2GL-XXXX series single mode transceivers is small form factor pluggable module for bi-directional serial optical data communications such as STM-16, OC-48,Fiber Channel, It is SFP 20-pin connector to allow hot plug capability. This module is designed for single mode fiber and operates at a nominal wavelength of 1310nm (1550nm).

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ZGSPXX2GL-XXXX

2.5G SFP Transceiver with DDM/DOM Optional

Features

Operating data rate up to 2.67G

1310 nm FP/DFB LD Transmitter

1550 nm DFB Laser

Distance up to 120KM

Single 3. 3V Power supply and TTL Logic

Interface

Duplex LC Connector Interface

Hot Pluggable

Operating Case Temperature

Standard: 0℃~+70℃,

Industrial:-40℃~+85℃

Compliant with MSA SFP Specification

Digital diagnostic monitor interface

Applications

Fiber Channel Switch Infrastructure

STM16 Optical Interface

ATM Switches and Routers

SDH/SONET Switch Infrastructure

Product Description

The ZGSPXX2GL-XXXX series single mode transceivers is small form factor pluggable module for bi-directional

 serial optical data communications such as STM-16, OC-48,Fiber Channel, It is SFP 20-pin connector to allow

hot plug capability.

This module is designed for single mode fiber and operates at a nominal wavelength of 1310nm (1550nm).

The transmitter section uses a multiple quantum well laser and is a class 1 laser compliant according to

International Safety Standard IEC-60825. The receiver section uses an integrated InGaAs detector preamplifier

(IDP) mounted in anoptical header and a limiting post-amplifier IC.

The ZGSPXX2GL-XXDI series are designed to be compliant with SFF-8472 SFP Multi-source Agreement (MSA)

and Industry working temperature.

Absolute Maximum Ratings

Parameter

Symbol

Min.

Max.

Unit

Storage Temperature

TS

-40

+85

°C

Supply Voltage

VCC

-0.5

3.6

V

Recommended Operating Conditions

Parameter

Symbol

Min.

Typical

Max.

Unit

Operating Temperature

TA

ZGSPXX1ML-XXXX

0

 

+70

°C

ZGSPXX1ML-XXXI

-40

 

+85

Power Supply Voltage

VCC

3.15

3.3

3.45

V

Data Rate

OC-48 /STM-16

 

 

2.488

2.67

Gbps

2 FC

2.125

Total Supply Current

ICC

 

 

300

mA

PERFORMANCE SPECIFICATIONS - ELECTRICAL

Parameter

Symbol

Min.

Typ.

Max

Unit

Notes

TRANSMITTER

CML/PECL Inputs(Differential)

Vin

400

 

1600

mVp

AC coupled inputs

Input Impedance (Differential)

Zin

85

100

115

ohms

Rin > 100 kohms @ DC

Tx_DISABLE Input Voltage - High

 

2

 

Vcc

V

 

Tx_DISABLE Input Voltage - Low

 

 

0

 

0.8

V

 

Tx_FAULT Output Voltage -- High

 

 

Vcc-0.5

 

Vcc+0.3

V

Io = 400μA; Host Vcc

Tx_FAULT Output Voltage -- Low

 

0

 

0.5

V

Io = -4.0mA

RECEIVER

CML Outputs (Differential)

Vout

400

800

1200

mVpp

AC coupled outputs

Output Impedance (Differential)

Zout

85

100

115

ohms

 

Rx_LOS Output Voltage - High

 

Vcc-0.5

 

Vcc+0.3

V

lo = 400μA; Host Vcc

 

Rx_LOS Output Voltage - Low

 

0

 

0.8

V

lo = -4.0mA

MOD_DEF ( 0:2 )

VoH

2.5

 

 

V

With Serial ID

VoL

0

 

0.5

V

Optical and Electrical Characteristics

 

Parameter

Symbol

Min.

Typical

Max.

Unit

 

9μm Core Diameter SMF

ZGSP312GL-2XX

 

 

2

 

Km

 

ZGSP312GL-15XX

 

 

15

 

 

ZGSP312GL-40XX

 

 

40

 

 

ZGSP552GL-40XX

 

 

40

 

 

ZGSP552GL-80XX

 

 

60

 

 

ZGSP552GL-120XX

 

 

120

 

 

Data Rate

 

 

100/155

 

Mbps

 

Transmitter

 

Centre Wavelength

λC

1260

1310

1360

nm

 

1480

1550

1580

nm

 

Spectral Width (RMS)

λ

 

 

3

nm

 

Average Output Power

ZGSP312GL-2XX

P0ut

-9

 

-3

dBm

 

ZGSP312GL-20XX

-6

 

-1

 

ZGSP312GL-40XX

-2

 

3

 

ZGSP552GL-40XX

-2

 

3

 

ZGSP552GL-80XX

0

 

5

 

ZGSP552GL-120XX

0

 

5

 

Extinction Ratio

EX

8.5

 

 

dB

 

Output Optical Eye

ITU-T G.957.Compliant

 

Data Input Swing Differential

VIN

500

 

2000

mV

 

Input Differential Impedance

ZIN

90

100

110

Ω

 

TX Disable

Disable

 

2.0

 

Vcc+0.3

V

 

 

Enable

0

 

0.8

 

TX_Fault

Fault

 

2.0

 

VCC+0.3

V

 

Normal

0

 

0.8

 

TX_Disable Assert Time

t_off

 

 

10

?s

 

Receiver

 

Centre Wavelength

λC

1260

 

1620

nm

 

Receiver Sensitivity

ZGSP312GL-2XX

PIN

 

 

-18

dBm

 

ZGSP312GL-20XX

 

 

-18

 

ZGSP312GL-40XX

APD

 

 

-26

 

ZGSP552GL-40XX

 

 

-18

 

ZGSP552GL-80XX

 

 

-26

 

ZGSP552GL-120XX

 

 

-30

Output Differential Impedance

 

90

100

110

Ω

Data Output Swing Differential

VOUT

370

 

2000

mV

Receiver Overload

Pmax -PIN

-3

 

0

dBm

Pmax -APD

-9

Rise/Fall Time

Tr/tf

 

 

2.2

ns

LOS De-Assert

PIN

LOSD

 

 

-19

dBm

APD

-28

LOS Assert

PIN

LOSA

-35

 

 

dBm

APD

-40

SFP Transceiver Electrical Pad Layout

Pin Function Definitions

Pin Num.

Name FUNCTION Plug Seq. Notes

1

VeeT

Transmitter Ground

1

 

2

TX Fault

Transmitter Fault Indication

3

Note 1

3

TX Disable

Transmitter Disable

3

Note 2, Module disables on high or open

4

MOD-DEF2

Module Definition 2

3

Note 3, Data line for Serial ID.

 

5

MOD-DEF1

Module Definition 1

3

Note 3, Clock line for Serial ID.

6

MOD-DEF0

Module Definition 0

3

Note 3, Grounded within the module.

7

Rate Select

Not Connect

3

Function not available

8

LOS

Loss of Signal

3

Note 4

9

VeeR

Receiver Ground

1

Note 5

10

VeeR

Receiver Ground

1

Note 5

11

VeeR

Receiver Ground

1

Note 5

12

RD-

Inv. Received Data Out

3

Note 6

13

RD+

Received Data Out

3

Note 7

14

VeeR

Receiver Ground

1

Note 5

15

VccR

Receiver Power

2

3.3 ± 5%, Note 7

16

VccT

Transmitter Power

2

3.3 ± 5%, Note 7

17

VeeT

Transmitter Ground

1

Note 5

18

TD+

Transmit Data In

3

Note 8

19

TD-

Inv. Transmit Data In

3

Note 8

20

VeeT

Transmitter Ground

1

Note 5

 

Notes:

1) TX Fault is an open collector/drain output, which should be pulled up with a 4.7K – 10KΩ resistor on the

host board. Pull up voltage between 2.0V and VccT, R+0.3V. When high, output indicates a laser fault of some

 kind. Low indicates normal operation. In the low state, the output will be pulled to < 0.8V.

2) TX disable is an input that is used to shut down the transmitter optical output. It is pulled up within the module

with a 4.7 –10 K Ω resistor. Its states are:

Low (0 – 0.8V): Transmitter on

(>0.8, < 2.0V): Undefined

High (2.0 – 3.465V): Transmitter Disabled

Open: Transmitter Disabled

3) Mod-Def 0,1,2. These are the module definition pins. They should be pulled up with a 4.7K – 10KΩresistor on

 the host board.

The pull-up voltage shall be VccT or VccR (see Section IV for further details). Mod-Def 0 is grounded by the module

 to indicate that the module is present Mod-Def 1 is the clock line of two wire serial interface for serial ID Mod-Def 2

is the data line of two wire serial interface for serial ID

4) LOS (Loss of Signal) is an open collector/drain output, which should be pulled up with a 4.7K – 10KΩ resistor.

Pull up voltagebetween 2.0V and VccT, R+0.3V. When high, this output indicates the received optical power is

below the worst-case receiversensitivity (as defined by the standard in use). Low indicates normal operation. In

the low state, the output will be pulled to < 0.8V.

5) VeeR and VeeT may be internally connected within the SFP module.

6) RD-/+: These are the differential receiver outputs. They are AC coupled 100Ω differential lines which should

be terminated with100Ω (differential) at the user SERDES. The AC coupling is done inside the module and is

thus not required on the host board.The voltage swing on these lines will be between 370 and 2000 mV

differential (185 –1000 mV single ended) when properly terminated.

7) VccR and VccT are the receiver and transmitter power supplies. They are defined as 3.3V ±5% at the

SFP connector pin. Maximum supply current is 300mA. Recommended host board power supply filtering is

 shown below. Inductors with DC resistance of less than 1 ohm should be used in order to maintain the

 required voltage at the SFP input pin with 3.3V supply voltage. When the recommended supply-filtering

network is used, hot plugging of the SFP transceiver module will result in an inrush current of no more than

30mA greater than the steady state value. VccR and VccT may be internally connected within the SFP

transceiver module.

8) TD-/+: These are the differential transmitter inputs. They are AC-coupled, differential lines with 100Ω

differential termination inside themodule. The AC coupling is done inside the module and is thus not

required on the host board. The inputs will accept differential swings of 500 – 2400 mV (250 – 1200mV

single-ended), though it is recommended that values between 500 and 1200 mV differential (250 –

600mV single-ended) be used for best EMI performance.

Digital Diagnostic Memory Map


EEPROM Serial ID Memory Contents

Accessing Seiral ID Memory uses the 2 wire address 1010000X(A0). Memory Contents of Serials ID are

 Shown in Table 1.

Table 1  EEPROM Memory Contents

Data Address

Size (Bytes)

Name of Field

Contents (Hex)

Description

BASE ID FIELDS

0

1

Identifier

03

SFP

1

1

Ext.Identifier

04

SFP function is defined by Serial ID

2

1

Connector

07

LC Connector

3-10

8

Transceiver

00 00 XX XX 00 00 00 00

Transmitter Code

11

1

Encoding

03

NRZ

12

1

BR,Nominal

19

Data Rate 2.5Gbps

13

1

Reserved

00

 

14

1

Length(9um) km

14/28/50/4E/A0

Transmitte distance

15

1

Length (9um) 100m

C8/00/00/00/00/00

16

1

Length(50um) 10m

00

17

1

Length (62.5um) 10m

00

18

1

Length (Copper)

00

 

19

1

Reserved

00

 

20-35

16

Vendor Name

46 49 42 45 52 50 4F 4E 20 20 20 20 20 20 20 20

“FIBERPON” (ASCII)

36

1

Reserved

00

 

37-39

3

Vendor OUI

00 00 00

IEEE ID Registered

40-55

16

Vendor PN

46 50 53 50 88 88 50 71 4C 2D 58 58 44 49 20 20

“ZGSPXX2GL-XXDI” (ASCII)

56-59

4

Vendor Rev.

31 2E 30 20

“1.0” (ASCII)

60-61

2

Wavelength

05 1E / 06 0E

1310nm / 1550nm

62

1

Reserved

00

 

63

1

CC_BASE

Xx

Check Sum for Base ID Fields

EXTENDED ID FIELDS

64-65

2

Options

00 1A

Tx_disable,Tx_Fault and loss of signal implented

66

1

BR, Max

00

 

67

1

BR, Min

00

 

68-83

16

Vendor SN

xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx

Serial Numuber of Transceivers (ASCII)

84-91

8

Date Code

xx xx xx xx xx xx 20 20

Date Code (Year/Month/Day)

92

1

Diagnostic Monitoring Tye

68

Digital diagnostic monitoring,”Internally Calibrated” is implemented

93

1

Enhanced Options

B0

Optional alarm/warn flags Implemented for all monitored quantities, Optional Soft Tx_Fault monitoring implemented, Optional Soft Rx_Los monitoring implemented

94

1

SFF_8472 Compliance

01

For SFF-8472 Rev.9.3

95

1

CC_EXT

xx

Check Sum for Extended ID Fields

VENDOR SPECIFIC ID FIELDS

96-127

32

Vendor Specific

Read Only

Depends on customer information

128-255

128

Reserved

Read Only

Filled by Zero

 

Diagnostic Monitor Functions

Diagnostic Monitor Functions interface uses the 2 wire address 1010001X(A2). Memory Contents of

Diagnostic Monitor Functions are shown in Table 2.

Table 2. DDM/DOM Functions

Data Address

Field Size (Bytes)

Name

Contents(Hex) and Description

Alarm and Warning Thresholds

00-01

2

Temperature High Alarm

“64 00” Set to 100 ℃

02-03

2

Temperature Low Alarm

“D3 00” Set to -45 ℃

04-05

2

Temperature High Warning

“5A 00” Set to 90 ℃

06-07

2

Temperature Low Warning

“”D8 00” Set to -40 ℃

08-09

2

Vcc High Alarm

“8C A0” Set to 3.6 V

10-11

2

Vcc Low Alarm

“75 30” Set to 3.0 V

12-13

2

Vcc High Warning

“88 E8” Set to 3.5 V

14-15

2

Vcc Low Warning

“79 18” Set to 3.1 V

16-17

2

Bias High Alarm

“88 B8” Set to 70mA

18-19

2

Bias Low Alarm

“03 E8” Set to 2mA

20-21

2

Bias High Warning

“75 30” Set to 60mA

22-23

2

Bias Low Warning

“05 DC” Set to 3mA

24-25

2

Tx Power High Alarm

“XX XX” Measurement Plus 2dB

26-27

2

Tx Power Low Alarm

“XX XX” Measurement Minus 2dB

28-29

2

Tx Power High Warning

“XX XX” Measurement Plus 1dB

30-31

2

Tx Power Low Warning

 “XX XX” Measurement Minus 1dB

32-33

2

Rx Power High Alarm

Overload input optical power

34-35

2

Rx Power Low Alarm

Maximum receiver sensitivity

36-37

2

Rx Power High Warning

Overload input power minus 3dB

38-39

2

Rx Power Low Warning

Maximum receiver sensitivity plus 3dB

40-55

16

Reserved

 

Calibration Constants

56-59

4

Rx_Power(4)

“00 00 00 00” Set to Zero for Internally Calibrated devices

60-63

4

Rx_Power(3)

“00 00 00 00” Set to Zero for Internally Calibrated devices

64-67

4

Rx_Power(2)

“00 00 00 00” Set to Zero for Internally Calibrated devices

68-71

4

Rx_Power(1)

“3F 80 00 00” Set to Zero for Internally Calibrated devices

72-75

4

Rx_Power(0)

“00 00 00 00” Set to Zero for Internally Calibrated devices

76-77

2

Tx_I ( Slope )

“01 00” Set to 1 for Internally Calibrated devices

78-79

2

Tx_I (OffSet)

“00 00” Set to Zero for Internally Calibrated devices

80-81

2

Tx Power (Slope)

“01 00” Set to 1 for Internally Calibrated devices

82-83

2

Tx Power (Offset)

“00 00” Set to Zero for Internally Calibrated devices

84-85

2

Temp.(Slope)

“01 00” Set to 1 for Internally Calibrated” devices

86-87

2

Temp.(Offset)

“00 00” Set to Zero for Internally Calibrated devices

88-89

2

Vcc (Slope)

“01 00” Set to 1 for Internally Calibrated devices

90-91

2

Vcc (Offset)

“00 00” Set to Zero for Internally Calibrated devices

92-94

3

Reserved

“00 00 00”

95

1

Check Sum

Check Sum bytes of “0-94”

Real Time Diagnostic Monitor Interface

96-97

2

Temperature (MSB, LSB)

Yield a 16-bit A/D (See table 3.1)

98-99

2

Supply Voltage (MSB, LSB)

Yield a 16-bit A/D (See table 3.1)

100-101

2

TX Bias Current (MSB,LSB)

Yield a 16-bit A/D (See table 3.1)

102-103

2

Tx Optical Power(MSB,LSB)

Yield a 16-bit A/D (See table 3.1)

104-105

2

Rx Received Power (MSB,LSB)

Yield a 16-bit A/D (See table 3.1)

106-109

4

Reserved

 

110

1

Logic Status

See Table 2.2

111

1

A/D Conversion Updates

See Table 2.2

112-119

8

Alarm and Warning Flags

See Table 2.2

Vendor Specific

120-122

3

Vendor Specific

Don’t Access

123-126

4

Password Entry

Write Only

127

1

Table Select Byte

Write / Read

128-247

120

User Writable EEPROM

Write / Read

248-255

8

Vendor Specific

Don’t Access

The measured values located at bytes 96-105(in the 2 wire address 0xA2) are raw A/D values(16-bit

 integers) of transceiver temperature,supply voltage,laser bias current,laser optical output power and

receiver power.

The digital value conversions are updated every 13ms(nominal) or 20ms(Max) in rotation.After getting

digital value,each measurement could be obtained by multiplying digital value by LSB 

Table 2.1 Real Time Diagnostic Monitor Value

A2H Byte 96 (Temperature MSB)

A2H Byte 97 (Temperature LSB)

D7

D6

D5

D4

D3

D2

D1

D0

D7

D6

D5

D4

D3

D2

D1

D0

Sign

26

25

24

23

22

21

20

2-1

2-2

2-3

2-4

2-5

2-6

2-7

2-8

When the value of Temp. @ D7 MSB = “0”, 

Real Temp. (Value) = TemperatureMSB   (Digital Value) + TemperatureLSB   (Digital Value)

TemperatureLSB = (D7LSB X 1/2 ) + (D6lSB X 1/4 )+ (D5LSB X 1/8 )+ (D4LSB X 1/16 )+ (D3LSB X 1/32 ) +

(D2LSB X 1/64 )+ (D1LSB X 1/128 )+ (D0LSB X 1/256 )

Else Temp.(Value) @ D7MSB = “1” ,

Value of Temp. @ MSB & LSB will be negating the currently value (e.g. “0” convert to “1”, “1” convert

to “0” ).  Then, the Value after negating, Plus “1” @ D0LSB , counting step by step, there will be generating

a new Value @ Temp.MSB  & Temp. LSB ;

Finally go to the situation above mentioned while Temp. @ D7 MSB = “0”, 

Vcc=Vcc(Digtial Value) X Vcc LSB = Vcc (Digital Value) X 100 uV

Tx Bias Current = Tx Bias Current (      Digital Value) X Tx BiasLSB = Tx Bias Current (       Digital Value) X 2uA

Tx Power = Tx Power (Digital Value) x Tx PowerLSB = Tx Power (Digital Value) X 0.1uW

Rx Power = Rx Power (Digital Value) x Rx PowerLSB = Rx Power (Digital Value) X 0.1uW

Table 2.2  Logistic Status, AD Conversion Updates & Alarm/Warning Flag Bits

Address

Bits

Name

Description

110

7

Tx Disable State

State of Tx disable (1) and enable (0)

110

6

Soft Tx Disable

Not Implemented

110

5-3

Reserved

 

110

2

Tx Fault State

Tx Failsure state (1); Normal State (0)

110

1

LOS

0=Optical Singal detected;
1= no optical signal detected

110

0

Data Ready Bar

Not Implemented

111

7-0

Reserved

Reserved

112

7

Temp. High Alarm

Set when internal temperature exceeds high alarm level.

112

6

Temp. Low Alarm

Set when internal temperature below low alarm level.

112

5

Vcc High Alarm

Set when internal supply voltage exceeds high alarm level.

112

4

Vcc Low Alarm

Set when internal supply voltage below low alarm level.

112

3

Tx Bia High Alarm

Set when Tx Bias current exceeds high alarm level

112

2

Tx Bias Low Alarm

Set when Tx Bias current below low alarm level

112

1

Tx Power High Alarm

Set Tx Power exceeds high alarm level

112

0

Tx Power Low Alarm

Set Tx Power below low alarm level

113

7

Rx Power High Alarm

Set when Received power exceeds high alarm level

113

6

Rx Power Low Alarm

Set when received power is below low alarm level

113

5-0

Reserved Alarm

 

114-115

All

Reserved

 

116

7

Temp. High Warning

Set when internal temperature exceeds high warning level.

116

6

Temp. Low Warning

Set when internal temperature below low warning level.

116

5

Vcc High Warning

Set when internal supply voltage exceeds high warning level.

116

4

Vcc Low Warning

Set when internal supply voltage below low warning level.

116

3

Tx Bias High Warning

Set when Tx Bias current exceeds high warnng level

116

2

Tx Bias Low Warning

Set when Tx Bias current below low warning level

116

1

Tx Power High Warning

Set Tx Power exceeds high warning level

116

0

Tx Power Low Warning

Set Tx Power below low warning level

117

7

Rx Power High Warning

Set when Received power exceeds high warning level

117

6

Rx Power Low Warning

Set when received power is below low warning level

117

5-0

Reserved Warning

 

118-119

All

Reserved

 

Recommend Circuit Schematic

Mechanical Specifications

Ordering information

Part No.

Data Rate

Laser

Receiver

Distance

Interface

DDM

Temp.

ZGSP312GL-2

2.5Gbps

FP

PIN-TIA

2Km

LC

NO

C

ZGSP312GL-20DI

2.5Gbps

DFB

PIN-TIA

20Km

LC

YES

I

ZGSP312GL-40D

2.5Gbps

DFB

APD-TIA

40Km

LC

YES

D

ZGSP552GL-40D

2.5Gbps

DFB

PIN-TIA

40Km

LC

YES

C

ZGSP552GL-80D

2.5Gbps

DFB

APD-TIA

80Km

LC

YES

C

ZGSP552GL-120DI

2,5Gbps

DFB

APD-TIA

120Km

LC

YES

I

* I--- Industrial operating temperature

*C--- Commercial Temperature

* D--- DDM / DOM

 

 

 

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