Delta Electronics Sonet OC-48/SDH Manuale utente

DELTA ELECTRONICS, INC.

1 Dec., 2006

Rev. 0E

www.deltaww.com

RoHS Compliant Multi-Rate CWDM SFP Transceiver for SONET

OC-48/SDH STM-16 with DDM Function

FEATURES

zCompliant with SFP Transceiver SFF-8472

MSA specification with internal calibration

zMulti-rate operation from 125 to 2670Mpbs

zSingle + 3.3V Power Supply and TTL Logic

Interface

zUncooled DFB laser transmitter and APD

receiver

zEight CWDM wavelength available

zEEPROM with Serial ID Functionality

zLaser Class 1 Product which comply with the

requirements of IEC 60825-1 and IEC 60825-2

zDuplex LC Connector interface

Description

The LCP-2488 CWDM series are designed

for coarse wavelength division multiplexing

applications (CWDM) and hot pluggable SFP

transceiver modules that data rates up to 2.67Gb/s.

The LCP-2488 CWDM series are support OC-48/

STM-16 as well as 2x Fiber channel (2.125Gb/s),

GbE (1.25Gb/s) and 1x Fiber channel (1.062Gb/s).

The selectiveness of center wavelength has 1470,

1490, 1510, 1530, 1550, 1570, 1590, and 1610nm.

The LCP-2488 CWDM series are designed to

be compliant with SFF-8472 SFP Multi-source

Agreement (MSA) with digital diagnostic

monitoring functions: Temperature, VCC, TX

optical power, TX laser bias current, and RX

received optical power.

The post-amplifier of the LCP-2488 CWDM

series also includes a Loss of Signal (LOS) circuit

that provides a TTL logic-high output when the

received optical level is below a preset LOS

Assert threshold.

Applications

zATM switches and routers

zSONET/SDH switch infrastructure

zxDSL applications

zGigabit Ethernet

zSwitch to Switch interface

zSwitched backplane applications

zFile server interface

Performance

zLCP-2488D4RxxR: 1470nm to 1610nm CWDM

DFB laser transmitter and APD receiver, 28dB

link budget

DELTA ELECTRONICS, INC.

2 Dec., 2006

Rev. 0E

www.deltaww.com

Absolute Maximum Ratings

Parameter Symbol Min. Typ. Max. Unit Note

Storage Temperature Ts -40 85 ºC

Supply Voltage VCC 0 5 V

Recommended Operating Conditions

Parameter Symbol Min. Typ. Max. Unit Note

Case Operating Temperature TC-5 70 ºC 1

Supply Voltage VCC 3.135 3.465 V

Data Rate 2488 Mbps

Note 1: See order information

Electrical Characteristics

(VCC=3.3V ±5%)

Parameter Symbol Min. Typ. Max. Unit Note

Total Supply Current

LCP-2488D4RxxR

LCP-2488D4RxxRH

LCP-2488D4RxxRT

ICCT

300

380

Transmitter

Transmitter Differential Input Voltage VDT 0.5 2.4 V 1

Transmitter Disable Input-High VDISH 2 VCC+0.3 V

Transmitter Disable Input-Low VDISL Vee 0.8 V

Transmitter Fault Pull up Resistor RTX_FAULT 4.7 10 k2

Transmitter Fault Output-High VTXFH 2 VCC+0.3 V

Transmitter Fault Output-Low VTXFL Vee 0.8 V

Receiver

Receiver Differential Output Voltage VDR 0.35 2 V 3

Receiver LOS Load RRXLOS 4.7 10 k2

LOS Output Voltage-High VLOSH 2 VCC+0.3 V

LOS Output Voltage-Low VLOSL Vee 0.8 V

Notes:

1. Internally AC coupled and terminated to 100Ohm differential load.

2. Pull up to VCC on host Board

3. Internally AC coupled, but requires a 100Ohm differential termination at or internal to Serializer/

Deserializer.

DELTA ELECTRONICS, INC.

3 Dec., 2006

Rev. 0E

www.deltaww.com

Optical Characteristics

Transmitter

(VCC=3.3V ±5%, Data Rate=2488Mb/sec, PRBS=223-1 NRZ)

Parameter Symbol Min. Typ. Max. Unit Note

Output Optical Power (Avg.) P 0 +5

dBm

Optical Extinction Ratio ER 8.2 dB

Center Wavelength

LCP-2488D4x47R

LCP-2488D4x49R

LCP-2488D4x51R

LCP-2488D4x53R

LCP-2488D4x55R

LCP-2488D4x57R

LCP-2488D4x59R

LCP-2488D4x61R

λC

1464.5

1484.5

1504.5

1524.5

1544.5

1564.5

1584.5

1604.5

1470

1490

1510

1530

1550

1570

1590

1610

1477.5

1497.5

1517.5

1537.5

1557.5

1577.5

1597.5

1617.5

Spectral Width (-20dB) σ1 nm

Side-mode Suppression Ratio SMSR 30 dB

Optical Rise/ Fall Time tr/tf150/200 psec 1

Relative Intensity Noise RIN -120 dB/Hz

Jitter Generation

Peak to Peak

RMS

Dispersion Penalty @ 80 km

JPP

Jrms

0.1

0.01

2.5

Output Eye Compliant with GR-253-CORE and ITU recommendation G.957

Receiver

(VCC=3.3V ±5%, Data Rate=2488Mb/sec, PRBS=223-1 NRZ)

Parameter Symbol Min. Typ. Max. Unit Note

Sensitivity (Avg.) @2.488Gbps PS-28

dBm 3, 4

Input Optical Wavelength λ1450 1620 nm

LOS-Deasserted (Avg.) PA

-28 dBm

LOS-Asserted (Avg.) PD-40 dBm

LOS-Hysteresis PA-PD0.5 dB

Overload P0-9 dBm

Reflectance r -27 dB

Notes:

1. These are unfiltered 20%~80% values.

2. SMF-28 fiber used. 80 km represents 1600ps/nm at 1610nm. Measured at 2.488 Gb/s with a

PRBS 223-1 pattern at a BER<10-10.

3. The sensitivity is provided at a BER of 1×10-10 or better with an input signal consisting of

2677Mb/s/OC-48/2X FC/GbE/1X FC/ OC-12/OC-3, 223-1 PRBS and ER=9dB.

4. 2.488 Gb/s BER<10-10 with PRBS 223-1. Does not include dispersion penalty.

DELTA ELECTRONICS, INC.

4 Dec., 2006

Rev. 0E

www.deltaww.com

Mean level of logical “1”

Mean level of logical “0”

Amplitude

Time

Optical Pulse Mask with Bessel Filter Specified in ITU-T G.957

1.25

1.00

0.75

0.25

0.00

-0.25

Mean level of logical “1”

Mean level of logical “0”

Amplitude

Time

Optical Pulse Mask with Bessel Filter Specified in ITU-T G.957

1.25

1.00

0.75

0.25

0.00

-0.25

Mask of the eye diagram for the optical transmit signal

Recommend Circuit Schematic

Laser Diode

Photo Diode

1uH

0.1uF10uF

0.1uF

0.01uF

0.1uF10uF

RES1

100 Ohms*

RES1 RES1 RES1

10k Ohms

100 Ohms

VCC

Protocol Vcc

SerDes ICProtocol IC

PLD / PAL Mod_def 2

Mod_def 1

Mod_def 0

3.3V

DELTA SFP Module

Preamp &

Tx_Disable

Quantizer

Tx_Fault

TD +

TD -

VeeT

RD +

RD -

Rx_LOS

VeeR

Tx_Disable

Tx_Fault

Rx_LOS

RES1 = 4.7k to 10k Ohms

VccT

VccR

Laser Driver

* Depands on SerDes IC used

EEPROM

DELTA ELECTRONICS, INC.

5 Dec., 2006

Rev. 0E

www.deltaww.com

SFP Transceiver Electrical Pad Layout

Pin Function Definitions

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, 2 wire serial ID interface

5 MOD-DEF1 Module Definition 1 3 Note 3, 2 wire serial ID interface

6 MOD-DEF0 Module Definition 0 3 Note 3, Grounded in 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

Plug Seq.: Pin engagement sequence during hot plugging.

DELTA ELECTRONICS, INC.

6 Dec., 2006

Rev. 0E

www.deltaww.com

Notes:

1) TX Fault is an open collector/drain output, which should be pulled up with a 4.7K – 10K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 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 –

10Kresistor 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 – 10K

resistor. Pull up voltage between 2.0V and VccT, R+0.3V. 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 < 0.8V.

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

6) RD-/+: These are the differential receiver outputs. They are AC coupled 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. 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 100

differential termination inside the module. 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 – 1200

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

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

DELTA ELECTRONICS, INC.

7 Dec., 2006

Rev. 0E

www.deltaww.com

SFP timing parameters for SFP management

Parameter Symbol Min. Max. Unit Note

TX_DISABLE Assert time t_off 10 μsec 1

TX_DISABLE Negate time t_on 1 msec 2

Time to initialize, including

reset of TX_FAULT t_init 300 msec 3

TX Fault Assert Time t_fault 100 μsec 4

TX_DISABLE to reset t_rest 10 μsec 5

LOS Assert Time t_loss_on 100 μsec 6

LOS Deassert Time t_loss_off 100 μsec 7

Serial ID Clock Rate f_serial_clock 100 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.

DELTA ELECTRONICS, INC.

8 Dec., 2006

Rev. 0E

www.deltaww.com

Package Outline Drawing

DELTA ELECTRONICS, INC.

9 Dec., 2006

Rev. 0E

www.deltaww.com

Enhanced Digital Diagnostic Interface

The memory map in the following describes an extension to the memory map defined in SFP MSA.

The enhanced interface uses the two wire serial bus address 1010001X(A2h) to provide diagnostic

information about the module’s present operating conditions.

2 wire address 1010000 X (A0h) 2 wire address 1010001 X (A2h)

0 0

Alarm and Warning Thresholds

(56 bytes)

Serial ID Defined by SFP MSA

(96 bytes) 56

Cal Constants

(40 bytes)

96 96

119

Real Time Diagnostic Interface

(24 bytes)

127

Vender Specific

(32 bytes) 120

127

Vender Specific

128 128

247

User Writable EEPROM

(120 bytes)

255

Reserved in SFP MSA

(128 bytes)

248

255

Vender Specific

(8 bytes)

Digital Diagnostic Memory Map Specific Data Field Descriptions

DELTA ELECTRONICS, INC.

10 Dec., 2006

Rev. 0E

www.deltaww.com

EEPROM Serial ID Memory Contents (2-Wire Address A0h)

Address Hex ASCII Address Hex ASCII Address Hex ASCII

00 03 43 PN 86 DC

01 04 44 PN 87 DC

02 07 45 PN 88 DC

03 00 Note 1 46 PN 89 DC

04 0C 47 PN 90 DC

05 00 48 PN 91 DC

06 00 49 PN 92 68

07 00 50 PN 93 B0

08 00 51 PN 94 02

09 00 52 PN 95 CS2 Note 9

10 00 53 PN 96 00

11 05 54 PN 97 00

12 19 55 PN 98 00

13 00 56 30 99 00

14 50 Note 2 57 30 100 00

15 FF Note 3 58 30 101 00

16 00 59 0A 102 00

17 00 60 CW Note 5 103 00

18 00 61 CW Note 5 104 00

19 00 62 00 105 00

20 44 D 63 CS1 Note 6 106 00

21 45 E 64 00 107 00

22 4C L 65 1A 108 00

23 54 T 66 05 109 00

24 41 A 67 05 110 00

25 20 68 SN Note 7 111 00

26 20 69 SN 112 00

27 20 70 SN 113 00

28 20 71 SN 114 00

29 20 72 SN 115 00

30 20 73 SN 116 00

31 20 74 SN 117 00

32 20 75 SN 118 00

33 20 76 SN 119 00

34 20 77 SN 120 00

35 20 78 SN 121 00

36 00 79 SN 122 00

37 00 80 SN 123 00

38 00 81 SN 124 00

39 00 82 SN 125 00

40 PN Note4 83 SN 126 00

41 PN 84 DC Note 8 127 00

42 PN 85 DC 128 00 Note 10

Notes:

1) Byte 3~10: Code for electronic compatibility or optical compatibility.

2) Byte 14:Transmission distance in km

3) Byte 15: Transmission distance in 100m, distance >25.5km: FFh

4) Byte 40-55: Delta part number

5) Byte 60-61: The center wavelength of transmitter

6) Byte 63: Check sum of bytes 0-62.

7) Byte 68-83: Serial number.

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