AFCT-57J5APZ_技术文档

AFCT-57J5APZ

Digital Diagnostic SFP, 1310nm, Fabry Perot 3.072/2.4576 Gb/s,

RoHS OBSAI/CPRI Compatible Optical Transceiver

Data Sheet

1310nm, SFP (Small Form Pluggable), Low Voltage (3.3V)

Digital Diagnostic, Optical Transceiver

Description

Features

Avago’s AFCT-57J5APZ optical transceiver supports

high speed serial links over single mode optical ﬁber at

signaling rates up to 3.072Gb/s for wireless base station

applications involving the OBSAI or CPRI protocols, as

well as related applications. The transceiver is compliant

with Small Form Pluggable (SFP) single-source agree-

ments INF-8074 and SFF-8472 for mechanical and electri-

cal speciﬁcations and FOCIS/IEC speciﬁcations for optical

duplex LC connectors.

• Fully RoHS Compliant

• Diagnostic Features Per SFF-8472 “Diagnostic

Monitoring Interface for Optical Transceivers”

• Real time monitors of:

- Transmitted Optical Power

- Received Optical Power

- Laser Bias Current

- Temperature

As an enhancement to the conventional SFP interfaced

deﬁned in INF-8074, the AFCT-57J5APZ is compliant to

SFF-8472 (Digital Diagnostic Interface for Optical Trans-

ceivers). Using the 2-wire serial interface deﬁned in SFF-

8472, the transceiver provides real time temperature,

supply voltage, laser bias current, laser average output

power and received input power. This information is in

addition to conventional SFP base data. The digital diag-

nostic interface also adds the ability to disable the trans-

mitter and monitor the status of transmitter fault and

receiver loss of signal.

- Supply Voltage

• Industrial Temperature and Supply Voltage Operation

(-40°C to 85°C) (3.3V ± 10%)

• Transceiver Speciﬁcations per SFP (INF-8074) and SFF-

8472 (revision 9.6)

• Up to 7km with 9um ﬁber for 3.072 Gb/s

• Up to 8km with 9um ﬁber for 2.4576 Gb/s

• LC Duplex optical connector interface conforming to

ANSI TIA/EIA604-10 (FOCIS 10A)

• 1310nm Fabry Perot Laser (FP) Source Technology

• IEC 60825-1 Class 1/CDRH Class 1 laser eye safe

Related Products

• AFBR-57J5AEZ: 850nm +3.3V LC SFP

• Compatible with Fibre Channel and Gigabit Ethernet

for OBSAI and CPRI

applications

• AFCT-57R5AEZ: 1310nm +3.3V LC SFP

Applications

for 4.25/2.125/1.0625 GBd Fibre Channel

Wireless and cellular base station system interconnect:

OBSAI rates: 3.072 Gb/s, 1.536 Gb/s, 0.768 Gb/s

• AFBR-57R5AEZ: 850nm +3.3V LC SFP

for 4.25/2.125/1.0625 GBd Fibre Channel

• AFCT-57D5APZ: 1310nm +3.3V LC SFP

CPRI rates: 3.072 Gb/s, 2.4576 Gb/s, 1.2288 Gb/s, 0.6144

Gb/s

for 8.5/4.25/2.125 GBd Fibre Channel

provide real-time access to transceiver internal supply

voltage and temperature, allowing a host to identify

potential component compliance issues. Received optical

power is also available to assess compliance of a cable

plant and remote transmitter. When operating out of re-

quirements, the link cannot guarantee error free trans-

mission.

Digital Diagnostic Interface and Serial Identiﬁcation

The 2-wire serial interface is based on ATMEL AT24C01A

series EEPROM protocol and signaling detail. Conven-

tional EEPROM memory, bytes 0-255 at memory address

0xA0, is organized in compliance with INF-8074. New

digital diagnostic information, bytes 0-255 at memory

address 0xA2, is compliant to SFF-8472. The new diag-

nostic information provides the opportunity for Predic-

tive Failure Identiﬁcation, Compliance Prediction, Fault

Isolation and Component Monitoring.

Fault Isolation

The fault isolation feature allows a host to quickly

pinpoint the location of a link failure, minimizing

downtime. For optical links, the ability to identify a fault

at a local device, remote device or cable plant is crucial to

speeding service of an installation. AFCT-57J5APZ real-

time monitors of Tx_Bias, Tx_Power, Vcc, Temperature and

Rx_Power can be used to assess local transceiver current

operating conditions. In addition, status ﬂags Tx_Disable

and Rx Loss of Signal (LOS) are mirrored in memory and

available via the two-wire serial interface.

Predictive Failure Identiﬁcation

The AFCT-57J5APZ predictive failure feature allows a host

to identify potential link problems before system perfor-

mance is impacted. Prior identiﬁcation of link problems

enables a host to service an application via “fail over”

to a redundant link or replace a suspect device, main-

taining system uptime in the process. For applications

where ultra-high system uptime is required, a digital SFP

provides a means to monitor two real-time laser metrics

associated with observing laser degradation and pre-

dicting failure: average laser bias current (Tx_Bias) and

average laser optical power (Tx_Power).

Component Monitoring

Component evaluation is a more casual use of the

AFCT-57J5APZ real-time monitors of Tx_Bias, Tx_Power,

Vcc, Temperature and Rx_Power. Potential uses are as

debugging aids for system installation and design, and

transceiver parametric evaluation for factory or ﬁeld qual-

iﬁcation. For example, temperature per module can be

observed in high density applications to facilitate thermal

evaluation of blades, PCI cards and systems.

Compliance Prediction:

Compliance prediction is the ability to determine if an

optical transceiver is operating within its operating and

environmental requirements. AFCT-57J5APZ devices

Electrical Interface

Receiver

Optical Interface

Rate Select

RD+ (Receive Data)

Amplification

&

Photo-Detector

Light from Fiber

Quantization

RD- (Receive Data)

Rx Loss Of Signal

MOD-DEF2 (SDA)

EEPROM

CONTROLLER

EEPROM

MOD-DEF1 (SCL)

MOD-DEF0

Transmitter

TX_DISABLE

TD+ (Transmit Data)

Laser Driver &

Safety Circuit

Light to Fiber

VCSEL

TD- (Transmit Data)

TX_FAULT

Figure 1 . Transceiver Functional Diagram

2

Receiver Section

Transmitter Section

The receiver section includes the Receiver Optical

SubAssembly (ROSA) and the ampliﬁcation/quanti-

zation circuitry. The ROSA, containing a PIN photodi-

ode and custom transimpedance ampliﬁer, is located

at the optical interface and mates with the LC optical

connector. The ROSA output is fed to a custom IC that

provides post-ampliﬁcation and quantization.

The transmitter section includes consists of the Transmit-

ter Optical SubAssembly (TOSA) and laser driver circuitry.

The TOSA, containing a 1310nm FABRY PEROT light

source, is located at the optical interface and mates with

the LC optical connector. The TOSA is driven by a custom

IC which uses the incoming diﬀerential high speed logic

signal to modulate the laser diode driver current. This

Tx laser driver circuit regulates the optical power at a

constant level provided the incoming data pattern is dc

balanced (8B/10B code, for example).

Receiver Loss of Signal (Rx_LOS)

The post-ampliﬁcation IC also includes transition

detection circuitry which monitors the ac level of

incoming optical signals and provides a TTL/CMOS com-

patible status signal to the host (pin 8). An adequate

optical input results in a low Rx_LOS output while a high

Rx_LOS output indicates an unusable optical input. The

Rx_LOS thresholds are factory set so that a high output

indicates a deﬁnite optical fault has occurred. Rx_LOS

can also be monitored via the two-wire serial interface

(address A2h, byte 110, bit 1).

Transmit Disable (Tx_Disable)

The AFCT-57J5APZ accepts a TTL and CMOS compatible

transmit disable control signal input (pin 3) which shuts

down the transmitter optical output. A high signal im-

plements this function while a low signal allows normal

transceiver operation. In the event of a fault (e.g. eye

safety circuit activated), cycling this control signal resets

the module as depicted in Figure 4. An internal pull up

resistor disables the transceiver transmitter until the host

pulls the input low. Host systems should allow a 10ms

interval between successive assertions of this control

signal. Tx_Disable can also be asserted via the two-

wire serial interface (address A2h, byte 110, bit 6) and

monitored (address A2h, byte 110, bit 7).

Functional Data I/O

The AFCT-57J5APZ interfaces with the host circuit board

through twenty I/O pins (SFP electrical connector) iden-

tiﬁed by function in Table 2. The board layout for this

interface is depicted in Figure 6.

The contents of A2h, byte 110, bit 6 are logic OR’d with

hardware Tx_Disable (pin 3) to control transmitter

operation..

The AFCT-57J5APZ high speed transmit and receive in-

terfaces require SFP MSA, OBSAI or CPRI compliant signal

lines on the host board. To simplify board requirements,

biasing resistors and ac coupling capacitors are incor-

porated into the SFP transceiver module (per INF-8074)

and hence are not required on the host board. The Tx_

Disable, Tx_Fault, Rx_LOS and Rate_Select lines require

TTL lines on the host board (per INF-8074) if used. If an

application chooses not to take advantage of the func-

tionality of these pins care must be taken to ground Tx_

Disable (for normal operation) and Rate_Select is set to

default in the proper state.

Transmit Fault (Tx_Fault)

A catastrophic laser fault will activate the transmitter

signal, TX_FAULT, and disable the laser. This signal is

an open collector output (pull-up required on the host

board). A low signal indicates normal laser operation

and a high signal indicates a fault. The TX_FAULT will

be latched high when a laser fault occurs and is cleared

by toggling the TX_DISABLE input or power cycling the

transceiver. The transmitter fault condition can also be

monitored via the two-wire serial interface (address A2,

byte 110, bit 2).

Figure 2 depicts the recommended interface circuit to

link the AFCT-57J5APZ to supporting physical layer ICs.

Timing for MSA compliant control signals implemented

in the transceiver are listed in Figure 4.

Eye Safety Circuit

The AFCT-57J5APZ provides Class 1 (single fault tolerant)

eye safety by design and has been tested for compliance

with the requirements listed in Table 1. The eye safety

circuit continuously monitors the optical output power

level and will disable the transmitter upon detecting an

unsafe condition beyond the scope of Class 1 certiﬁca-

tion. Such unsafe conditions can be due to inputs from

the host board (Vcc ﬂuctuation, unbalanced code) or a

fault within the transceiver.

3

Application Support

Regulatory Compliance

An Evaluation Kit and Reference Designs are available to

assist in evaluation of the AFCT-57J5APZ . Please contact

your local Field Sales representative for availability and

ordering details.

The AFCT-57J5APZ complies with all applicable laws

and regulations as detailed in Table 1. Certiﬁcation level

is dependent on the overall conﬁguration of the host

equipment. The transceiver performance is oﬀered as a

ﬁgure of merit to assist the designer

Caution

Electrostatic Discharge (ESD)

There are no user serviceable parts nor maintenance re-

quirements for the AFCT-57J5APZ. All mechanical ad-

justments are made at the factory prior to shipment.

Tampering with, modifying, misusing or improperly

handling the AFCT-57J5APZ will void the product

warranty. It may also result in improper operation and

possibly overstress the laser source. Performance deg-

radation or device failure may result. Connection of the

AFCT-57J5APZ to a light source not compliant with these

speciﬁcations, operating above maximum operating

conditions or in a manner inconsistent with it’s design

and function may result in exposure to hazardous light

radiation and may constitute an act of modifying or man-

ufacturing a laser product. Persons performing such an

act are required by law to re-certify and re-identify the

laser product under the provisions of U.S. 21 CFR (Sub-

chapter J) and TUV.

The AFCT-57J5APZ is compatible with ESD levels found

in typical manufacturing and operating environments

as described in Table 1. In the normal handling and

operation of optical transceivers, ESD is of concern in

two circumstances.

The ﬁrst case is during handling of the transceiver prior

to insertion into an SFP compliant cage. To protect

the device, it’s important to use normal ESD handling

precautions. These include using of grounded wrist

straps, workbenches and ﬂoor wherever a transceiver is

handled.

The second case to consider is static discharges to the

exterior of the host equipment chassis after installation.

If the optical interface is exposed to the exterior of host

equipment cabinet, the transceiver may be subject to

system level ESD requirements.

Ordering Information

Electromagnetic Interference (EMI)

Please contact your local ﬁeld sales engineer or one of

Avago Technologies franchised distributors for ordering

information. For technical information, please visit Avago

Technologies’ WEB page at www.Avago.com or contact

Avago Technologies Semiconductor Products Customer

Response Center at 1-800-235-0312. For information

related to SFF Committee documentation visit www.sﬀ-

committee.org.

Equipment incorporating gigabit transceivers is typically

subject to regulation by the FCC in the United States,

CENELEC EN55022 (CISPR 22) in Europe and VCCI

in Japan. The AFCT-57J5APZ’s compliance to these

standards is detailed in Table 1. The metal housing and

shielded design of the AFCT-57J5APZ minimizes the EMI

challenge facing the equipment designer.

EMI Immunity (Susceptibility)

Due to its shielded design, the EMI immunity of the

AFCT-57J5APZ exceeds typical industry standards.

Flammability

The AFCT-57J5APZ optical transceiver is made of metal

and high strength, heat resistant, chemical resistant and

UL 94V-0 ﬂame retardant plastic.

4

Table 1. Regulatory Compliance

Feature

Test Method

Performance

Electrostatic Discharge (ESD)

to the Electrical Pins

MIL-STD-883C Method 3015.4

Class 1 (> 2000 Volts)

Electrostatic Discharge (ESD)

to the Duplex LC Receptacle

Variation of IEC 61000-4-2

Typically, no damage occurs with 25 kV when

the duplex LC connector receptacle is contacted

by a Human Body Model probe.

GR1089

10 contacts of 8 KV on the electrical faceplate

with device inserted into a panel.

Electrostatic Discharge (ESD)

to the Optical Connector

Variation of IEC 801-2

Air discharge of 15kV(min) contact to

connector w/o damage

Electromagnetic Interference

(EMI)

FCC Class B

CENELEC EN55022 Class B

(CISPR 22A)

System margins are dependent on customer

board and chassis design.

VCCI Class 1

Immunity

Variation of IEC 61000-4-3

Typically shows no measurable eﬀect from a

10V/m ﬁeld swept from 10 MHz to 1 GHz.

Laser Eye Safety

and Equipment Type Testing

US FDA CDRH AEL Class 1

US21 CFR, Subchapter J per

Paragraphs 1002.10 and 1002.12.

CDRH certiﬁcation # TBD

TUV ﬁle # TBD

BAUART

··

GEPRUFT

(IEC) EN60825-1: 1994 + A11+A2

(IEC) EN60825-2: 1994 + A1

(IEC) EN60950: 1992 + A1 + A2 + A3

+ A4 + A11

T^·U^·V

TYPE

APPROVED

Rheinland

Product Safety

Component Recognition

Underwriters Laboratories and Canadian Standards Associa-

tion Joint Component Recognition for Information Technology

Equipment Including Electrical Business Equipment

UL File # TBD

5

V

,T

CC

GND,T

6.8 kΩ

Tx DIS

Tx_DISABLE

Tx_FAULT

Tx FAULT

.01 µF

TD+

TDÐ

100 Ω

LASER DRIVER

4.7 k to 10 k

0.1 µF

Ω�

1 µH

V

,T

CC

3.3 V

10 µF

SERDES IC

0.1 µF

1 µH

10 µF

V ,R

CC

PROTOCOL IC

0.1 µF

�

4.7 k to

10 k

�

Ω

�

.01 µF

RD+

100 Ω�

RD-

.01 µF

Rx LOS

GND,R

LOSS OF SIGNAL

RATE SELECT

POST AMPLIFIER

3.3 V

30 kΩ

4.7 k to 10 k

Ω�

4.7 k to 10 kΩ

MOD_DEF0

MOD_DEF1

MOD_DEF2

4.7 k to 10 kΩ�

MODULE DETECT

SCL

SDA

Figure 2. Typical Application Conﬁguration

1 µH

V

T

CC

0.1 µF

1 µH

3.3 V

V

R

CC

10 µF

0.1 µF

10 µF

SFP MODULE

HOST BOARD

NOTE: INDUCTORS MUST HAVE LESS THAN 1 Ω SERIES RESISTANCE TO LIMIT VOLTAGE DROP TO THE SFP MODULE.

Figure 3. Recommended Power Supply Filter

6

Table 2. Pin Description

1

Name

VeeT

Function/Description

Notes

Transmitter Ground

2

TX_FAULT

TX_DISABLE

MOD-DEF2

MOD-DEF1

MOD-DEF0

no connect

RX_LOS

VeeR

Transmitter Fault Indication – High indicates a fault condition

Transmitter Disable – Module optical output disables on high or open

Module Deﬁnition 2 – Two wire serial ID interface data line (SDA)

Module Deﬁnition 1 – Two wire serial ID interface clock line (SCL)

Module Deﬁnition 0 – Grounded in module (module present indicator)

Note 1

Note 2

Note 3

3

4

5

6

7

8

Loss of Signal – High indicates loss of received optical signal

Receiver Ground

Note 4

9

10

11

12

13

14

15

16

17

18

19

20

VeeR

Receiver Ground

VeeR

Receiver Ground

RD-

Inverse Received Data Out

Received Data Out

Note 5

RD+

VeeR

Receiver Ground

VccR

Receiver Power + 3.3 V

Transmitter Power + 3.3 V

Transmitter Ground

Note 6

VccT

VeeT

TD+

Transmitter Data In

Note 7

TD-

Inverse Transmitter Data In

Transmitter Ground

VeeT

Notes

1. TX_FAULT is an open collector/drain output, which must be pulled up with a 4.7k – 10kW resistor on the host board. When high, this 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 internally pulled up (within the transceiver) with a 6.8kW

resistor.

Low (0 – 0.8V):

Between (0.8V and 2.0V):

High (2.0 – Vcc max) or OPEN:

Transmitter on

Undeﬁned

Transmitter Disabled

3. The signals Mod-Def 0, 1, 2 designate the two wire serial interface pins. They must be pulled up with a 4.7k – 10kW resistor on the host board.

Mod-Def 0 is grounded by the module to indicate the module is present

Mod-Def 1 is serial clock line (SCL) of two wire serial interface

Mod-Def 2 is serial data line (SDA) of two wire serial interface

4. RX_LOS (Rx Loss of Signal) is an open collector/drain output that must be pulled up with a 4.7k – 10kW resistor on the host board. 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. RD-/+ designate the diﬀerential receiver outputs. They are AC coupled 100W diﬀerential lines which should be terminated with 100W diﬀerential

at the host SERDES input. AC coupling is done inside the transceiver and is not required on the host board. The voltage swing on these lines will

be between 500 and 1600 mV diﬀerential (250 – 800 mV single ended) when properly terminated.

6. VccR and VccT are the receiver and transmitter power supplies. They are deﬁned at the SFP connector pin. The maximum supply current is 300

mA and the associated in-rush current will typically be no more than 30 mA above steady state after 500 nanoseconds.

7. TD-/+ designate the diﬀerential transmitter inputs. They are AC coupled diﬀerential lines with 100W diﬀerential termination inside the module.

The AC coupling is done inside the module and is not required on the host board. The inputs will accept diﬀerential swings of 400 – 2400 mV

(200 – 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.

7

Table 3. Absolute Maximum Ratings

Parameter

Symbol

Minimum

Maximum

100

Unit

C

Notes

Storage Temperature

Case Operating Temperature

Relative Humidity

T

S

-40

5

Note 1,2

Note 1

T

C

100

C

RH

95

%

V

Supply Voltage

Vcc

T, R

-0.5

3.8

Note 1,2,3

Note 1

Low Speed Input Voltage

V

IN

Vcc+0.5

V

Notes

1. Absolute Maximum Ratings are those values beyond which damage to the device may occur if these limits are exceeded for other than a short

period of time. See Reliability Data Sheet for speciﬁc reliability performance.

2. Between Absolute Maximum Ratings and the Recommended Operating Conditions functional performance is not intended, device reliability is

not implied, and damage to the device may occur over an extended period of time.

3. The module supply voltages, V T and V R must not diﬀer by more than 0.5V or damage to the device may occur.

CC

Table 4. Recommended Operating Conditions

Parameter

Symbol

Minimum

-40

Maximum

85

Unit

°C

Notes

Note 1,2

Note 2

Case Operating Temperature

Supply Voltage

Data Rate

T

C

Vcc

T, R

2.97

3.63

V

0.614

3.072

Gb/s

Notes

1. The Ambient Operating Temperature limitations are based on the Case Operating Temperature limitations and are subject to the host system

thermal design.

2. Recommended Operating Conditions are those values for which functional performance and device reliability is implied.

Table 5. Transceiver Electrical Characteristics

(TC = -40°C to 85°C, VccT, VccR = 3.3V ± 10%)

Parameter

Symbol

Minimum

Maximum

Unit

Notes

AC Electrical Characteristics

Power Supply Noise Rejection (peak-peak)

DC Electrical Characteristics

Module supply current

PSNR

100

mV

Note 1

I

CC

300

350

mA

-40°C to 70°C

-40°C to 85°C

Power Dissipation

P

1000

mW

V

DISS

Low Speed Outputs:

Transmit Fault (TX_FAULT),

Loss of Signal (RX_LOS),

MOD-DEF 2

V

2.0

VccT,R+0.3

0.8

Note 2

OH

OL

V

Low Speed Inputs:

Transmit Disable (TX_DIS), Rate Select

(RATE_SELECT)

V

2.0

0

Vcc

0.8

V

Note 3

IH

IL

MOD-DEF 1, MOD-DEF 2

Notes

1. Filter per SFP speciﬁcation is required on host board to remove 10 Hz to 2 MHz content.

2. Pulled up externally with a 4.7k – 10kW resistor on the host board to 3.3V.

3. Rate_Select, Mod-Def1 and Mod-Def2 must be pulled up externally with a 4.7k – 10kW resistor on the host board to 3.3V.

8

Table 6. Transmitter Optical Characteristics

(T = -40°C to 85°C, VccT, VccR = 3.3V ± 10%)

C

Parameter

Symbol

Minimum

Typical

Maximum

Unit

Notes

Modulated Optical Output Power (OMA)

(Peak-to-Peak)

Tx,OMA

300

µW

Note 2,6

Average Optical Output Power

Center Wavelength

Pout

-9.5

-3.0

dBm

nm

ps

Note 1, 2

l

1280

1345

C

Spectral Width – rms

Optical Rise/Fall Time (8.5 Gb/s)

RIN 12 (OMA)

s,rms

tr, tf

RIN

Note 6

100

-120

50

20% - 80%

dB/Hz

ps

Transmitter Contributed Deterministic Jitter

(0.614 to 3.072 Gb/s)

DJ

-40/85°C, Note 3

-20/85°C, Note 3

-40/85°C, Note 4, 5

-20/85°C, Note 4, 5

30

ps

Transmitter Contributed Total Jitter

(0.614 to 3.072 Gb/s)

TJ

80

ps

60

Pout TX_DISABLE Asserted

P

OFF

-35

dBm

Notes:

1. Max Pout is the lesser of Class 1 safety limits (CDRH and EN 60825) or receiver power, max.

2. Into single-mode optical ﬁber.

3. Contributed DJ is measured on an oscilloscope in average mode with 50% threshold and K28.5 pattern.

-12

4. Contributed RJ is calculated for 1x10 BER by multiplying the RMS jitter (measured on a single rise or fall edge) from the oscilloscope by 14.

5. In a network link, each component’s output jitter equals each component’s input jitter combined with each component’s contributed jitter.

Contributed DJ adds in a linear fashion and contributed RJ adds in a RMS fashion.

6. OMA, center wavelength and spectral width must comply with the Triple Tradeoﬀ Curve shown below.

9

Table 7. Receiver Optical Characteristics

(T = -40°C to 85°C, VccT, VccR = 3.3V ± 10%)

C

Parameter

Symbol

Minimum

Typical

Maximum

Unit

Notes

Input Optical Power [Overdrive]

P

IN

-3

dBm, avg

-12

Input Optical Modulation Amplitude

Peak-to-Peak (0.614 to 3.072 Gb/s)

[Sensitivity]

OMA

29

41

µW, oma 1x10 BER , Note 1

-15

µW, oma 1x10 BER, Note 1

Return Loss

12

dB

Loss of Signal – Assert

P

A

13.8

uW, oma

-30

15

-20.5

dBm, avg Note 2

uW, oma

Loss of Signal - De-Assert

P

D

-20.0

0.5

dBm, avg Note 2

dB

Loss of Signal Hysteresis

P - P

D A

Notes

1. Input Optical Modulation Amplitude (commonly known as sensitivity) requires a valid 8B/10B encoded input.

2. These average power values are speciﬁed with an Extinction Ratio of 9dB. The loss of signal circuitry responds to valid 8B/10B encoded peak to

peak input optical power, not average power.

Table 8. Transmitter and Receiver Electrical Characteristics

(T = -40°C to 85°C, VccT, VccR = 3.3V ± 10%)

C

Parameter

Symbol

Minimum

Typical

Maximum

Unit

Notes

High Speed Data Input:

V

I

400

2400

mV

Note 1

Transmitter Diﬀerential Input Voltage (TD +/-)

High Speed Data Output:

Receiver Diﬀerential Output Voltage (RD +/-)

Vo

500

30

1600

25

mV

ps

Note 2

Receiver Contributed Deterministic Jitter

(0.614 to 3.072 Gb/s)

DJ

Note 3, 7

Note 4, 6, 7

Note 5

Receiver Contributed Total Jitter

(0.614 to 3.072 Gb/s)

TJ

65

ps

Receiver Electrical Output Rise & Fall Times

(20-80%)

Tr, tf

200

ps

Notes

1. Internally AC coupled and terminated (100 Ohm diﬀerential).

2. Internally AC coupled but requires an external load termination (100 Ohm diﬀerential).

3. Contributed DJ is measured on an oscilloscope in average mode with 50% threshold and K28.5 pattern

-12

4. Contributed RJ is calculated for 1x10 BER by multiplying the RMS jitter (measured on a single rise or fall edge) from the oscilloscope by 14.

5. 20%-80% electrical rise & fall times measured with a 500 MHz signal utilizing a 1010 data pattern.

6. In a network link, each component’s output jitter equals each component’s input jitter combined with each component’s contributed jitter.

Contributed DJ adds in a linear fashion and contributed RJ adds in a RMS fashion.

7. Measured at an input optical power of 48uW, OMA.

10

Table 9. Transceiver SOFT DIAGNOSTIC Timing Characteristics

(T = -40°C to 85°C, VccT, VccR = 3.3V ± 10%)

C

Parameter

Symbol

Minimum

Maximum

Unit

µs

Notes

Note 1

Note 2

Note 3

Note 4

Note 5

Note 6

Note 7

Note 8

Note 9

Note 10

Note 11

Note 12

Note 13

Note 14

Note 15

Note 16

Note 17

Hardware TX_DISABLE Assert Time

Hardware TX_DISABLE Negate Time

Time to initialize, including reset of TX_FAULT

Hardware TX_FAULT Assert Time

Hardware TX_DISABLE to Reset

Hardware RX_LOS DeAssert Time

Hardware RX_LOS Assert Time

Hardware RATE_SELECT Assert Time

Hardware RATE_SELECT DeAssert Time

Software TX_DISABLE Assert Time

Software TX_DISABLE Negate Time

Software Tx_FAULT Assert Time

Software Rx_LOS Assert Time

Software Rx_LOS De-Assert Time

Software RATE_SELECT Assert Time

Software RATE_SELECT DeAssert Time

Analog parameter data ready

Serial bus hardware ready

t_oﬀ

10

t_on

1

ms

µs

t_init

300

100

t_fault

t_reset

10

µs

t_loss_on

t_loss_oﬀ

t_rate_high

t_rate_low

t_oﬀ_soft

t_on_soft

t_fault_soft

t_loss_on_soft

t_loss_oﬀ_soft

t_rate_soft_high

t_rate_soft_low

t_data

100

10

µs

10

µs

100

1

ms

kHz

1

1000

300

10

t_serial

Write Cycle Time

t_write

Serial ID Clock Rate

f_serial_clock

100

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. Time from power on or falling edge of Tx_Disable to when the modulated optical output rises above 90% of nominal.

4. From power on or negation of TX_FAULT using TX_DISABLE.

5. Time TX_DISABLE must be held high to reset the laser fault shutdown circuitry.

6. Time from loss of optical signal to Rx_LOS Assertion.

7. Time from valid optical signal to Rx_LOS De-Assertion.

8. Time from rising or falling edge of Rate_Select input until transceiver is in conformance with appropriate speciﬁcation.

9. Time from two-wire interface assertion of TX_DISABLE (A2h, byte 110, bit 6) to when the optical output falls below 10% of nominal. Measured

from falling clock edge after stop bit of write transaction.

10. Time from two-wire interface de-assertion of TX_DISABLE (A2h, byte 110, bit 6) to when the modulated optical output rises above 90% of

nominal.

11. Time from fault to two-wire interface TX_FAULT (A2h, byte 110, bit 2) asserted.

12. Time for two-wire interface assertion of Rx_LOS (A2h, byte 110, bit 1) from loss of optical signal.

13. Time for two-wire interface de-assertion of Rx_LOS (A2h, byte 110, bit 1) from presence of valid optical signal.

14. Time from two-wire interface selection of Rate_Select input (A2h, byte 110, bit 3) write STOP condition until completion of the receiver

bandwidth switch

15. From power on to data ready bit asserted (A2h, byte 110, bit 0). Data ready indicates analog monitoring circuitry is functional.

16. Time from power on until module is ready for data transmission over the serial bus (reads or writes over A0h and A2h).

17. Time from stop bit to completion of a 1-8 byte write command.

11

Table 10. Transceiver Digital Diagnostic Monitor (Real Time Sense) Characteristics

(T = -40°C to 85°C, VccT, VccR = 3.3V ± 10%)

C

Parameter

Symbol Min

Units

Notes

Transceiver Internal

Temperature Accuracy

T

± 3.0

± 0.1

± 10

°C

Temperature is measured internal to the transceiver.

Valid from = -40°C to 85 °C case temperature.

INT

Transceiver Internal

Supply Voltage Accuracy

V

Supply voltage is measured internal to the transceiver and can, with less accuracy,

be correlated to voltage at the SFP Vcc pin. Valid over 3.3 V ± 10%.

INT

Transmitter Laser DC

Bias Current Accuracy

I

%

dB

IINT is better than ± 10% of the nominal value.

INT

Transmitted Average Optical

Output Power Accuracy

P

± 3.0

Coupled into single-mode ﬁber. Valid from 100 uW to 500 uW, avg.

Coupled from single-mode ﬁber. Valid from 15 uW to 500 uW, avg.

T

Received Average Optical

Input Power Accuracy

R

Description of the Digital Diagnostic Data

Transceiver Internal Temperature

and supply voltage operating points. The AFCT-57J5APZ

uses a closed loop laser bias feedback circuit to maintain

constant optical power. This circuit compensates for

normal FABRY PEROT parametric variations in quantum

eﬃciency, forward voltage and lasing threshold due

to changing transceiver operating points. Consistent

increases in laser bias current observed at equilibrium

temperature and supply voltage could be an indication

of laser degradation. For more information on using laser

bias current for predicting laser lifetime, contact Avago

Technologies.

Temperature is measured on the AFCT-57J5APZ using

sensing circuitry mounted on the internal PCB. The

measured temperature will generally be cooler than laser

junction and warmer than SFP case and can be indirect-

ly correlated to SFP case or laser junction temperature

using thermal resistance and capacitance modeling. This

measurement can be used to observe drifts in thermal

operating point or to detect extreme temperature ﬂuctu-

ations such as a failure in the system thermal control. For

more information on correlating internal temperature to

case or laser junction contact Avago Technologies.

Transmitted Average Optical Output Power

Transceiver Internal Supply Voltage

Transmitted average optical power is measured using

sensing circuitry located on the transmitter laser driver

IC and laser optical subassembly. Variations in average

optical power are not expected under normal operation

because the AFCT-57J5APZ uses a closed loop laser bias

feedback circuit to maintain constant optical power. This

circuit compensates for normal FABRY PEROT parametric

variations due to changing transceiver operating points.

Only under extreme laser bias conditions will signiﬁcant

drifting in transmitted average optical power be observ-

able. Therefore it is recommended Tx average optical

power be used for fault isolation, rather than predictive

failure purposes.

Supply voltage is measured on the AFCT-57J5APZ using

sensing circuitry mounted on the internal PCB. Transmit

supply voltage (VccT) is monitored for this readback. The

resultant value can be indirectly correlated to SFP VccT

or VccR pin supply voltages using resistance modeling,

but not with the required accuracy of SFF-8472. Supply

voltage as measured will be generally lower than SFP Vcc

pins due to use of internal transient suppression circuitry.

As such, measured values can be used to observe drifts in

supply voltage operating point, be empirically correlated

to SFP pins in a given host application or used to detect

supply voltage ﬂuctuations due to failure or fault in the

system power supply environment. For more information

on correlating internal supply voltage to SFP pins contact

Avago Technologies.

Received Average Optical Input Power

Received average optical power is measured using

detecting circuitry located on the receiver preamp and

quantizer ICs. Accuracy is +/- 3.0 dB, but typical accuracy

is +/- 2.0 dB. This measurement can be used to observe

magnitude and drifts in incoming optical signal level for

detecting cable plant or remote transmitter problems.

Transmitter Laser DC Bias Current

Laser bias current is measured using sensing circuitry

located on the transmitter laser driver IC. Normal varia-

tions in laser bias current are expected to accommo-

date the impact of changing transceiver temperature

12

V

T,R > 2.97 V

TX_FAULT

V

T,R > 2.97 V

TX_FAULT

CC

TX_DISABLE

TRANSMITTED SIGNAL

t_init

t-init: TX DISABLE NEGATED

t-init: TX DISABLE ASSERTED

V

T,R > 2.97 V

TX_FAULT

TX_DISABLE

CC

TX_DISABLE

TRANSMITTED SIGNAL

t_off

t_on

t_init

INSERTION

t-init: TX DISABLE NEGATED, MODULE HOT PLUGGED

t-off & t-on: TX DISABLE ASSERTED THEN NEGATED

OCCURANCE OF FAULT

TX_FAULT

TX_DISABLE

TRANSMITTED SIGNAL

t_fault

t_reset

* SFP SHALL CLEAR TX_FAULT IN

t_init*

< t_init IF THE FAILURE IS TRANSIENT

t-fault: TX FAULT ASSERTED, TX SIGNAL NOT RECOVERED

t-reset: TX DISABLE ASSERTED THEN NEGATED, TX SIGNAL RECOVERED

OCCURANCE OF FAULT

TX_FAULT

TX_DISABLE

OCCURANCE OF LOSS

LOS

TRANSMITTED SIGNAL

t_loss_on

t_loss_off

t_fault

t_reset

* SFP SHALL CLEAR TX_FAULT IN

t_init*

< t_init IF THE FAILURE IS TRANSIENT

t-fault: TX DISABLE ASSERTED THEN NEGATED, TX SIGNAL NOT RECOVERED

t-loss-on & t-loss-off

Figure 4. Transceiver Timing Diagrams (Module Installed Except Where Noted)

13

Table 12. EEPROM Serial ID Memory Contents – Conventional SFP Memory (Address A0h)

Byte #

Decimal

Data

Hex

Byte #

Data

Notes

Decimal Hex Notes

0

03

04

07

00

0A

00

01

00

01

1F

00

08

50

00

41

56

41

47

4F

20

00

SFP physical device

SFP function deﬁned by serial ID only

LC optical connector

37

38

39

40

41

42

43

44

45

46

47

48

00

17

6A

41

46

43

54

2D

35

37

4A

35

41

50

5A

20

05

1E

00

Hex Byte of Vendor OUI 1

1

Hex Byte of Vendor OUI 1

2

Hex Byte of Vendor OUI 1

3

“A”- Vendor Part Number ASCII character

“F”- Vendor Part Number ASCII character

“C”- Vendor Part Number ASCII character

“T”- Vendor Part Number ASCII character

“-”- Vendor Part Number ASCII character

“5”- Vendor Part Number ASCII character

“7”- Vendor Part Number ASCII character

“J”- Vendor Part Number ASCII character

“5”- Vendor Part Number ASCII character

“A”- Vendor Part Number ASCII character

“ P”- Vendor Part Number ASCII character

“ Z”- Vendor Part Number ASCII character

“ ”- Vendor Part Number ASCII character

Hex Byte of Laser Wavelength 2

4

5

6

7

Medium distance

8

9

Single mode optical media

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

Compatible with 8B/10B encoded data

3100 MBit/sec nominal bit rate (3.072 Gbit/s) 49

50

8 km of single mode ﬁber @ 3.1GBit/sec

51

52

53

54

55

56

“A”- Vendor Name ASCII character

“V”- Vendor Name ASCII character

“A”- Vendor Name ASCII character

“G”- Vendor Name ASCII character

“O”- Vendor Name ASCII character

“ ”- Vendor Name ASCII character

57

58

59

60

61

Hex Byte of Laser Wavelength 2

62

63

Checksum for Bytes 0-62 3

64

00

1A

00

50

65

Hardware SFP TX_DISABLE, TX_FAULT & RX_LOS

66

67

80% below nominal rate tolerated (0.614 Gb/s)

Vendor Serial Number ASCII characters 4

Vendor Date Code ASCII characters 5

68-83

84-91

92

68

F0

03

Digital Diagnostics, Internal Cal, Rx Pwr Avg

A/W, Soft SFP TX_DISABLE, TX_FAULT & RX_LOS

SFF-8472 Compliance to revision 10

93

94

95

Checksum for Bytes 64-94 3

96 - 255

00

Notes:

1. The IEEE Organizationally Unique Identiﬁer (OUI) assigned to Avago Technologies is 00-17-6A (3 bytes of hex).

2. Laser wavelength is represented in 16 unsigned bits. The hex representation of 1310 (nm) is 051E.

3. Addresses 63 and 95 are checksums calculated (per SFF-8472 and SFF-8074) and stored prior to product shipment.

4. Addresses 68-83 specify the AFCT-57J5APZ ASCII serial number and will vary on a per unit basis.

5. Addresses 84-91 specify the AFCT-57J5APZ ASCII date code and will vary on a per date code basis.

14

Table 13. EEPROM Serial ID Memory Contents – Enhanced Feature Set Memory (Address A2h)

Byte #

Decimal Notes

Byte #

Decimal

Byte #

Decimal

Notes

0

Temp H Alarm MSB 1

26

Tx Pwr L Alarm MSB 4

Tx Pwr L Alarm LSB 4

Tx Pwr H Warning MSB 4

Tx Pwr H Warning LSB 4

Tx Pwr L Warning MSB 4

Tx Pwr L Warning LSB 4

Rx Pwr H Alarm MSB 5

Rx Pwr H Alarm LSB 5

Rx Pwr L Alarm MSB 5

Rx Pwr L Alarm LSB 5

Rx Pwr H Warning MSB 5

Rx Pwr H Warning LSB 5

Rx Pwr L Warning MSB 5

Rx Pwr L Warning LSB 5

Reserved

104

Real Time Rx Pwr MSB 5

Real Time Rx Pwr LSB 5

Reserved

1

Temp H Alarm LSB 1

Temp L Alarm MSB 1

Temp L Alarm LSB 1

Temp H Warning MSB 1

Temp H Warning LSB 1

Temp L Warning MSB 1

Temp L Warning LSB 1

Vcc H Alarm MSB 2

27

105

2

28

106

3

29

107

Reserved

4

30

108

Reserved

5

31

109

Reserved

6

32

110

Status/Control - See Table 14

Reserved

7

33

111

8

34

112

Flag Bits - See Table 15

Reserved

9

Vcc H Alarm LSB 2

35

113

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

Vcc L Alarm MSB 2

36

114

Vcc L Alarm LSB 2

37

115

Reserved

Vcc H Warning MSB 2

Vcc H Warning LSB 2

Vcc L Warning MSB 2

Vcc L Warning LSB 2

Tx Bias H Alarm MSB 3

Tx Bias H Alarm LSB 3

Tx Bias L Alarm MSB 3

Tx Bias L Alarm LSB 3

Tx Bias H Warning MSB 3

Tx Bias H Warning LSB 3

Tx Bias L Warning MSB 3

Tx Bias L Warning LSB 3

Tx Pwr H Alarm MSB 4

Tx Pwr H Alarm LSB 4

38

116

Flag Bits - See Table 15

Reserved

39

117

40-55

56-94

95

118-127

128-247

248-255

External Calibration Constants 6

Checksum for Bytes 0-94 7

Real Time Temperature MSB 1

Real Time Temperature LSB 1

Real Time Vcc MSB 2

Customer Writeable

Vendor Speciﬁc

96

97

98

99

Real Time Vcc LSB 2

100

101

102

103

Real Time Tx Bias MSB 3

Real Time Tx Bias LSB 3

Real Time Tx Power MSB 4

Real Time Tx Power LSB 4

Notes:

1. Temperature (Temp) is decoded as a 16 bit signed twos compliment integer in increments of 1/256 degrees C.

2. Supply Voltage (Vcc) is decoded as a 16 bit unsigned integer in increments of 100 uV.

3. Laser bias current (Tx Bias) is decoded as a 16 bit unsigned integer in increments of 2 uA.

4. Transmitted average optical power (Tx Pwr) is decoded as a 16 bit unsigned integer in increments of 0.1 uW.

5. Received average optical power (Rx Pwr) is decoded as a 16 bit unsigned integer in increments of 0.1 uW.

6. Bytes 55-94 are not intended for use with AFCT-57J5APZ, but have been set to default values per SFF-8472.

7. Byte 95 is a checksum calculated (per SFF-8472) and stored prior to product shipment.

15

Table 14. EEPROM Serial ID Memory Contents – Soft Commands (Address A2h, Byte 110)

Bit #

Status/Control Name

TX_ DISABLE State

Soft TX_ DISABLE

reserved

Description

Notes

Note 1

Note 1,2

7

6

5

4

3

2

1

0

Digital state of SFP TX_ DISABLE Input Pin (1 = TX_DISABLE asserted)

Read/write bit for changing digital state of TX_DISABLE function

reserved

TX_FAULT State

RX_LOS State

Data Ready (Bar)

Digital state of the SFP TX_FAULT Output Pin (1 = TX_FAULT asserted)

Digital state of the SFP RX_LOS Output Pin (1 = RX_LOS asserted)

Indicates transceiver is powered and real time sense data is ready. (0 = Ready)

Note 1

Notes:

1. The response time for soft commands of the AFCT-57J5APZ is 100 msec as speciﬁed by the MSA SFF-8472

2. Bit 6 is logic OR’d with the SFP TX_DISABLE input pin 3 ... either asserted will disable the SFP transmitter.

Table 15. EEPROM Serial ID Memory Contents – Alarms and Warnings (Address A2h, Bytes 112, 113, 116, 117)

Byte

Bit

7

Flag Bit Name

Description

112

Temp High Alarm

Temp Low Alarm

Vcc High Alarm

Set when transceiver internal temperature exceeds high alarm threshold.

Set when transceiver internal temperature exceeds low alarm threshold.

Set when transceiver internal supply voltage exceeds high alarm threshold.

Set when transceiver internal supply voltage exceeds low alarm threshold.

Set when transceiver laser bias current exceeds high alarm threshold.

Set when transceiver laser bias current exceeds low alarm threshold.

Set when transmitted average optical power exceeds high alarm threshold.

Set when transmitted average optical power exceeds low alarm threshold.

Set when received average optical power exceeds high alarm threshold.

Set when received average optical power exceeds low alarm threshold.

6

5

4

Vcc Low Alarm

3

Tx Bias High Alarm

Tx Bias Low Alarm

Tx Power High Alarm

Tx Power Low Alarm

Rx Power High Alarm

Rx Power Low Alarm

reserved

2

1

0

113

116

7

6

0-5

7

Temp High Warning

Temp Low Warning

Vcc High Warning

Vcc Low Warning

Tx Bias High Warning

Tx Bias Low Warning

Tx Power High Warning

Tx Power Low Warning

Rx Power High Warning

Rx Power Low Warning

reserved

Set when transceiver internal temperature exceeds high warning threshold.

Set when transceiver internal temperature exceeds low warning threshold.

Set when transceiver internal supply voltage exceeds high warning threshold.

Set when transceiver internal supply voltage exceeds low warning threshold.

Set when transceiver laser bias current exceeds high warning threshold.

Set when transceiver laser bias current exceeds low warning threshold.

Set when transmitted average optical power exceeds high warning threshold.

Set when transmitted average optical power exceeds low warning threshold.

Set when received average optical power exceeds high warning threshold.

Set when received average optical power exceeds low warning threshold.

6

5

4

3

2

1

0

117

7

6

0-5

16

Figure 5 . Module drawing

17

X

Y

34.5

10

3x

7.2

7.1

10x 1.05 ± 0.01

0.1 L X A S

2.5

0.85 ± 0.05

0.1 S X Y

16.25

MIN. PITCH

1

2.5

B

A

1

PCB

EDGE

3.68

5.68

20

PIN 1

8.58

8.48

2x 1.7

11.08

14.25

11.93

16.25

REF.

9.6

4.8

11

10

SEE DETAIL 1

9x 0.95 ± 0.05

2.0

11x

0.1 L X A S

11x 2.0

5

26.8

2

10

3x

3

41.3

42.3

5

3.2

20x 0.5 ± 0.03

0.06 L A S B S

0.9

LEGEND

20

PIN 1

10.53

10.93

1. PADS AND VIAS ARE CHASSIS GROUND

2. THROUGH HOLES, PLATING OPTIONAL

11.93

9.6

0.8

TYP.

11

10

3. HATCHED AREA DENOTES COMPONENT

AND TRACE KEEPOUT (EXCEPT

CHASSIS GROUND)

4

4. AREA DENOTES COMPONENT

KEEPOUT (TRACES ALLOWED)

2 ± 0.005 TYP.

0.06 L A S B S

2x 1.55 ± 0.05

0.1 L A S B S

DIMENSIONS ARE IN MILLIMETERS

DETAIL 1

Figure 6. SFP host board mechanical layout

18

1.7 ± 0.9

3.5 ± 0.3

41.78 ± 0.5

CASE TEMPERATURE

MEASUREMENT POINT

CAGE ASSEMBLY

15 MAX.

11.73 REF

15.25 ± 0.1

9.8 MAX.

10 REF

(to PCB)

10.4 ± 0.1

PCB

16.25 ± 0.1 MIN. PITCH

0.4 ± 0.1

(below PCB)

DIMENSIONS ARE IN MILLIMETERS

Figure 7 . SFP Assembly Drawing

For product information and a complete list of distributors, please go to our web site: www.avagotech.com

Avago, Avago Technologies, and the A logo are trademarks of Avago Technologies, Limited in the United States and other countries.

AV02-0680EN - September 11, 2007


型号：	AFCT-57J5APZ
厂家：	AVAGO TECHNOLOGIES LIMITED
描述：	Digital Diagnostic SFP, 1310nm, Fabry Perot 3.072/2.4576 Gb/s, RoHS OBSAI/CPRI Compatible Optical Transceiver 数字诊断SFP ， 1310 ，法布里 - 珀罗3.072 / 2.4576 Gb / s的，符合OBSAI / CPRI兼容光收发器光纤
文件：	总19页 (文件大小：515K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

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