AVAGO AFCT-57V6NSZ Small form factor pluggable (sfp) lc optical transceiver for 1.25gbd ethernet at extended link lengths (up to 40km) Datasheet

AFCT-57V6NSZ
Small Form Factor Pluggable (SFP) LC Optical Transceiver
for 1.25GBd Ethernet at Extended Link Lengths (Up to 40km)
Data Sheet
Description
The AFCT-57V6NSZ transceiver is a specially customised
low-cost and hot-pluggable SFP MSA-compliant optical
interconnect module for Gigabit Ethernet applications at
transmission distances up to 40km [1, 2].
The AFCT-57V6NSZ implements the serial portion of the
physical layer, and supports the features shown below
The AFCT-57V6NSZ features differential serial I/O interface lines that are AC-coupled signals. Avago’s design
of the long wavelength SFP module uses a 1550 nm
distributed feedback (DFB) laser diode (LD) and takes
advantage of an integrated preamplifier/photo-detector.
The AFCT-57V6NSZ also contains transmitter, receiver
and control electronics.
Singlemode optical fiber, with LC connectors, is recommended as the communication media. The AFCT57V6NSZ has a digital diagnostic monitoring (DDM)
function in accordance with SFF-8472 [3] which allows
monitoring operating temperature, supply voltage, laser
bias current, transmitter optical output power and optical received power in real time via a serial-ID interface.
On the following page, Table1 lists the general specifications for the AFCT-57V6NSZ SFP.
Features
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•
•
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•
Gigabit Ethernet transceiver
RoHS Compliant
IEEE 802.3z, 1000BASE-ZX
Extended transmission distance up to 40 km
Compliant with SFP Multi Source Agreement (MSA)
Duplex-LC optical interface
1550 nm DFB-LD
Serial ID
Digital Diagnostic Monitoring interface
Bail delatch for easy removal from cage
Available in industrial temperature range
(-40 to +85°C)
Immune to ESD, RF fields, and Vcc noise
Designed for very low RF emissions
Class 1 laser safety
AC-coupled differential serial I/O interface
Single +3.3 Volt supply operation
Low power dissipation
Applications
Figure 1 shows a simplified block diagram of the AFCT57V6NSZ electronics.
• Ethernet switches
Related Products
• Broadband aggregation and wireless infrastructure
• AFBR-5715Z family:
850 nm 1.25 GBd 3.3 V multimode SFP Gigabit Ethernet transceivers with DMI
• AFCT-5715Z:
1.25 GBd Ethernet (1000Base-LX) SFP with DMI
• Multi-service switches and routers
• Switched backplane applications
• High Speed Interface for server farms
• Metro access switch GbE connections
Digital Diagnostic
Monitoring Interface
(A2h)
SCL
SDA
Module Definition
(A0h)
SCL
SDA
MOD_DEF[1]
TD +
100 ohm
TD-
Modulation
Bias
Circuit
DFB-LD
DC Bias
Circuit
Optical
Output
Monitor
PD
APC
Circuit
TX_DISABLE
TX_FAULT
Optical
Connector
MOD_DEF[2]
Control Circuit
RD +
Limiting
Amp
RD RX_LOS
TZ
AMP
Optical
Connector
Transmitter
PIN-PD
Level
Detector
Receiver
VccR
VccT
VeeR
Vcc Slow Start
VeT
Figure 1. AFCT-57V6NSZ Simplified Block Diagram
Table 1. General AFCT-57V6NSZ Specifications
Parameter
1000BASE-ZX*
unit
Nominal Bit Rate
1.25
Gbps
Link Loss Budget
17
dB
Minimum Required Link Loss
0
dB
Bit Error Ratio(BER)
<10-12
-
Fiber Core Diameter
9
mm
Operating Range(max)
40
km
†
Optical specifications are modified to realize 40 km transmission in singlemode fiber.
Optical
Input
Absolute Maximum Ratings
Recommended Operating Conditions
Operation of the AFCT-57V6NSZ beyond the Absolute
Maximum Ratings listed in Table 2 can degrade or damage the product. With the exception of laser safety, it
is not implied that the product will function above the
Recommended Operating Conditions. It is possible to
reduce the reliability and lifetime of the device if the
Recommended Operating Conditions are exceeded (see
Table 3).
Table 3 lists the conditions under which the AFCT57V6NSZ is tested and should be operated. It is possible
to reduce the reliability and lifetime of the device if these
ratings are exceeded for extended periods. Functional
operation should be restricted to these Recommended
Operating Conditions.
Table 2. Absolute Maximum Ratings
Parameter
Symbol
Min
Max
Unit
Supply Voltage
Vcc
-0.3
4.0
V
Relative Humidity *
RH
5
85
%
TX_DISABLE Input Voltage
VIN
-0.5
Vcc+0.5
V
Storage Temperature
Ts
-40
+85
°C
† No condensation
Table 3. Recommended Operating Conditions
Parameter
Symbol
Min
Typ
Max
Unit
Supply Voltage
Vcc
3.135
3.3
3.465
V
Ripple And Noise
-
-
-
100
mVp-p
Operating Case Temperature
AFCT-57V6NSZ
AFCT-57V6ANSZ
TC
TC
-5
-40
-
70
85
°C
†
Measured with a sinusoidal signal from 100 Hz to 2 MHz at the input of the recommended power supply filter shown in Figure 13.
Handling Precautions
Optical Description
Avago advises that precautions be taken to avoid electrostatic discharge (ESD) during handling, assembly, and
testing of the AFCT-57V6NSZ. Degradation or damage
can occur if proper guidelines for handling ESD sensitive
devices are not followed. This could result in an inoperable device or unsafe operation as described above.
Table 4 describes the performance of the transmitter portion of the AFCT-57V6NSZ over the operating conditions.
Table 5 describes the performance of the receiver portion
of the AFCT-57V6NSZ over the operating conditions.
In particular, avoid getting particulate or solvent contamination onto the optical surfaces of the laser and photodetector assemblies. It is also strongly recommended that
the LC connector receptacle be covered when not in use.
Excessive force when installing and extracting the AFCT57V6NSZ should be avoided. Refer to the SFP Application
Note [6] for additional handling information.
The optical pulse characteristics of the transmitter are
specified in the form of an eye pattern. When measured
in accordance with [2], the mask shown in Figure 2 evaluates rise time, fall time, overshoot and undershoot.
Table 4. Transmitter Optical Specifications
Parameter
Symbol
Min
Typ
Max
Unit
Spectral Center Wavelength
lC
1500
1550
1580
nm
-20dB Spectral Width
Dl20
-
-
0.5
nm
Side Mode Suppression Ratio
SMSR
30
-
-
dB
Optical Output Power, Average*
PO
-4
-
0
dBm
Extinction Ratio
ER
9
-
-
dB
Rise/Fall Time**
Tr/Tf
-
-
260
ps
Total Jitter (TJ)
TJ
-
-
0.28
UI
Optical Waveform
-
Compliant with IEEE 802.3z eye mask (Refer to Figure 2)
Disable Optical Output Power
-
-
-
-35
dBm
Parameter
Symbol
Min
Typ
Max
Unit
Spectral Center Wavelength
lC
1270
-
1600
nm
Receiver Saturation
Pmax
0
-
.
dBm
Minimum Receiver Sensitivity
Pmin
.
-
-21
dBm
RX_LOS Assert Level
LOSA
-35
-
.
dBm
RX_LOS De-assert Level
LOSD
.
-
-24.5
dBm
RX_LOS Hysteresis
LOSHYS
0.5
2
.
dB
Return Loss
RL
12
-
.
dB
† SMF 9/125
†† 20 % - 80 % edge rate without filter
Table 5. Receiver Optical Specifications
†
Receiver sensitivity is measured at the center of the eye for BER=1x10-12 using PRBS 2^7-1
130
Normalized Amplitude (%)
100
80
50
20
0
-20
0
22
37.5
62.5
78
Normalized Time (% of Unit Interval)
Figure 2. Transmitter Eye Mask
100
Electrical Description
The supply current of the AFCT-57V6NSZ is described in
Table 6 below. The inrush current is defined as the additional inrush due to hot plugging.
The characteristics for the control and status signals are
shown in Table 7. Output status signals, TX_FAULT and
RX_LOS, are all open-collector/drain, and the levels indicated assuming 4.7k-10k ohm pull-up resistor to Host_Vcc
is present. The levels of MOD_DEF[1] and MOD_DEF[2] are
also indicated assuming that they are pulled up with a
4.7k-10k ohm resistor to +3.3 V on host board. Table 8
indicates the voltage levels required to be delivered by
the host to the transmitter differential serial data input
TD+/-. Table 9 indicates the voltage level output from the
receiver differential serial data output RD+/-.
Table 6. Electrical Characteristics
Parameter
Symbol
Min
Typ
Max
Unit
Supply Current
ICC
-
-
300
mA
Inrush Current*
Linrush
-
-
30
mA
†
greater than the steady state value
Table 7. Control/Status Signal Characteristics
Parameter
Symbol
Min
Max
Unit
TX_DISABLE Input Voltage - High
VIH
2.0
VccT
V
TX_DISABLE Input Voltage - Low
VIL
0
0.8
V
TX_FAULT Output Voltage - High
VOH
Host_Vcc-0.5
Host_Vcc
V
TX_FAULT Output Voltage - Low
VOL
0
0.4
V
RX_LOS Output Voltage – High
VOH
Host_Vcc-0.5
Host_Vcc
V
RX_LOS Output Voltage – Low
VOL
0
0.4
V
MOD_DEF[2] (SDA) Output Voltage – Low
VOL
.
0.4
V
MOD_DEF[1] (SCL) Input Voltage – High
VIH
VccT, (VccR) x 0.7
.
V
MOD_DEF[1] (SCL) Input Voltage – Low
VIL
-
VccT(VccR) x 0.3
V
Table 8. TD+/- Input Signal Requirements
Parameter
Symbol
Min
Typ
Max
Unit
Input Amplitude, Differential
VI
200
.
2400
mV p-p
Input Impedance, Differential
RI
.
100
.
W
Deterministic Jitter
DJ
.
.
0.10
UI
Total Jitter ††
TJ
.
.
0.24
UI
Mark Ratio
.
.
50
.
%
Parameter
Symbol
Min
Typ
Max
Unit
Output Amplitude, Differential*
VO
600
-
1200
mVp-p
Output Impedance, Differential
RO
-
100
-
W
† AC-coupled.
†† TJ = RJ + DJ. At BER = 10-12
Table 9. RD+/- Output Signal Characteristics
†
AC-coupled.
Pin Description
A brief description of all of the electrical connector pins follows. The connector has staged contacts, so that hot-plugging can be performed. See Table 10.
Table 10. Pinout
Pin No.
Sequence
Description
Pin No
Sequence
Description
1
1
VeeT
11
1
VeeR
2
3
TX_FAULT
12
3
RD-
3
3
TX_DISABLE
13
3
RD+
4
3
MOD_DEF[2]
14
1
VeeR
5
3
MOD_DEF[1]
15
2
VccR
6
3
MOD_DEF[0]
16
2
VccT
7
3
RATE_SELECT
17
1
VeeT
8
3
RX_LOS
18
3
TD+
9
1
VeeR
19
3
TD-
10
1
VeeR
20
1
VeeT
Hot-Plugging Sequence
The ground, VCC and other pins designated as the sequence (1) pins engage first during hot-plugging. The
sequence (2) pins connect second during hot-plugging
followed by the sequence (3) pins. Conversely, when
the module is unplugged from the host system, the sequence (3) pins disengages before the sequence (2) pins
disengages and then followed by the sequence (1) pins.
Inserting or removing the AFCT-57V6NSZ will disrupt
data transmission. This disruption occurs when the
downstream receiver (e.g. deserializer phase-lock-loop)
resynchronizes to a different bitstream signal. When this
occurs, the downstream system will recognize the associated error (e.g. comma detect, loss-of-light, disparity,
CRC, and frame errors).
It is the responsibility of the system integrator to assure
that no thermal, energy, or voltage hazard exists during
the hot-plug-unplug sequence. It is also the responsibility
of the system integrator and end-user to minimize static
electricity and the probability of ESD events by careful
design.
20
VeeT
1
VeeT
19
TD-
2
TX_FAULT
18
TD+
3
TX_DISABLE
17
VeeT
4
MOD_DEF[2]
16
VccT
5
MOD_DEF[1]
15
VccR
6
MOD_DEF[0]
14
VeeR
7
RATE_SELECT
13
RD+
8
RX_LOS
12
RD-
9
VeeR
11
VeeR
10
VeeR
Top of Board
Bottom of Board
(as view through top of board)
Figure 3. SFP Transceiver Electrical Pad Layout
Pin Definitions
TD+/TD- Transmit Data In and Inverted Transmit Data In are
differential input to the transmitter. They are internally ACcoupled into an equivalent load of RI differential, as shown
in Figure 13.
TX_DISABLE Active high TTL input, with internal 10kΩ pullup resistor to Vcc.
Asserting the transmitter disable will deactivate the laser
within the assert time. The truth table shown describes
the state of the module, and Table 11 indicates the timing
of TX_DISABLE.
RD+/RD- Received Data Out and Inverted Received Data
Out are differential serial output from the receiver. These
are AC-coupled 100 ohm differential lines which should
be terminated with a 100 ohm (differential) at the user
SERDES, as shown in Figure 13. AC coupling is done inside
the module and is thus not required on the host board.
RX_LOS Active high open collector/drain output which
indicates a loss-of-signal condition (LOS). When the average optical power received by the module is below the
Assert Level, RX_LOS is indicated according to the truth
table below, and Table 11 indicates the timing of RX_LOS.
RX_LOS requires a 4.7k-10k ohm pull-up resistor external
to the module, i.e., in the host system Host_Vcc, as shown
in Figure 13. The pull-up voltage is between 2.0 V and
VccR(VccT) + 0.3 V.
RATE_SELECT Not Connected.
TX_FAULT Active high open collector/drain output which
indicates a fault in the module.
This can be (1) failure of the laser driver or (2) end-of-life
of the laser. Under these conditions, the laser will be deactivated within the assert time. TX_FAULT also requires a
4.7k-10k ohm pull-up resistor external to the module, i.e.
in the host system Host_Vcc, as shown in Figure 13. The
pull-up voltage is between 2.0 V and VccT(VccR) + 0.3 V.
Conditions (1) and (2) are latched, and for diagnostic purposes only, may be reset by toggling TX_DISABLE high for
at least t_reset. See Table 11 and Figure 8.
MOD_DEF[0:2] The AFCT-57V6NSZ has a serial ID function which provides information about the transceiver’s
capabilities, standard interfaces, manufacturer and other
information, and has a digital diagnostic monitoring
function, per SFF-8472 [3], which allows monitoring operating temperature, supply voltage, laser bias current,
transmitter optical output power and optical received
power in real time. These functions are provided via a two
wire serial EEPROM interface.
MOD_DEF[0] is connected to ground inside the module.
MOD_DEF[1] is the serial clock signal input. MOD_DEF[2]
is the data output/input.
Timing Characteristics of Control and Status I/O
The timing characteristics of the control and status line are listed in Table 11 and Figure 4 to 10.
Table 11. Timing Characteristics of Control and Status I/O
Parameter
Symbol
Min
Max
Unit
Condition
TX_DISABLE
Assert Time
t_off
-
10
µs
Time from rising edge of TX_DISABLE to when the optical
output falls below 10 % of nominal
TX_DISABLE
Negate Time
t_on
-
1
ms
Time from falling edge of TX_DISABLE to when the modulated optical output rises above 90% of nominal
Time to Initialize,
including reset of
TX_FAULT
t_init
-
300
ms
From power on or negation of TX_FAULT using TX_DISABLE
TX_FAULT
Assert Time
T_fault
-
100
µs
Time from fault to TX_FAULT on
TX_DISABLE to
Reset
T_reset
10
-
µs
Time TX_DISABLE must be held high to reset TX_FAULT
RX_LOS Assert
Time
t_losson
-
100
µs
Time from LOS state to RX_LOS Assert
RX_LOS Negate
Time
t_lossoff
-
100
µs
Time from non-LOS state to RX_LOS deassert
Serial ID
Clock Rate
F_clock
-
100
kHz
-
Vcc > 2.97 V
Vcc > 2.97 V
TX_FAULT
TX_FAULT
TX_DISABLE
TX_DISABLE
Transmitted Signal
Transmitted Signal
t_init
t_init
Figure 4. Power on initialization of SFP transceiver, TX_DISABLE negated
Figure 5. Power on initialization of SFP transceiver, TX_DISABLE asserted
TX_FAULT
Occurrence of transmitter
safety fault
TX_DISABLE
TX_FAULT
Transmitted Signal
TX_DISABLE
t_on
t_off
Transmitted Signal
t_fault
Figure 6. SFP TX_DISABLE timing during normal operation
Figure 7. Detection of transmitter safety fault condition
Occurrence of transmitter
safety fault
Occurrence of transmitter
safety fault
TX_FAULT
TX_FAULT
TX_DISABLE
TX_DISABLE
Transmitted Signal
Transmitted Signal
t_fault
t_reset
t_reset
t_init *
t_init *
* SFP will clear TX_FAULT in < t_init if the fault is transient
* SFP will clear TX_FAULT in < t_init if the fault is transient
Figure 8. Successful recovery from transient safety fault condition
Figure 9. Unsuccessful recovery from safety fault condition
Occurrence of loss
of signal (LOS)
RX_LOS
t_losson
Figure 10. Timing of RX_LOS detection
t_lossoff
Serial Identification
The serial identification (ID) at 2 wire serial bus address
1010000X (A0h) provides access to identification information that describes the transceiver’s capabilities,
standard interfaces, manufacturer, and other information.
The serial interface uses the 2-wire serial CMOS E2PROM
protocol defined for the ATMEL AT24C01A/02/04 family
of components or equivalent components. The information obtained from the AFCT-57V6NSZ via the serial ID is
shown in Table 12.
Table 12. Serial ID: Data Fields - 2-Wire Address A0h
BASE ID FIELDS
Data Address
Field Size (Byte)
Name of field
Description of Field
Context (Hex)
0
1
Identifier
SFP
03h
1
1
Ext. Identifier
SFP
04h
2
1
Connector
LC
07h
3
8
Transceiver
—————
00h
4
—————
00h
5
—————
00h
6
1000BASE-LX
02h
7
—————
00h
8
—————
00h
9
—————
00h
10
—————
00h
11
1
Encoding
8B/10B
01h
12
1
BR, Nominal
x 100 Mbits/sec
0Ch
13
1
Reserved
—————
00h
14
1
Length (9µm) - km
40 x 1 km
28h
15
1
Length (9µm)
Longer than 25.4 km
FFh
16
1
Length (50µm)
Not Supported -
00h
17
1
Length (62.5µm)
Not Supported -
00h
18
1
Length (Copper)
Not Supported -
00h
19
1
Reserved
—————
00h
20
16
Vendor name
A
41
21
V
56
22
A
41
23
G
47
24
O
4F
25
—————
20h
26
—————
20h
27
—————
20h
28
—————
20h
29
—————
20h
30
—————
20h
31
—————
20h
32
—————
20h
33
—————
20h
34
—————
20h
35
—————
20h
10
Table 12. Serial ID: Data Fields - 2-Wire Address A0h (Continued)
BASE ID FIELDS
Data Address
Field Size (Byte)
Name of field
Description of Field
Context (Hex)
36
1
Reserved
—————
00h
37
3
Vendor OUI
00-17-6A
00h
38
17h
39
6Ah
40
A
41
41
F
46
42
C
43
43
T
54
44
-
2D
45
5
35
46
7
37
47
V
56
48
5
35
49
N
4E
50
S
53
51
Z
5A
52
—————
20h
53
—————
20h
54
—————
20h
55
—————
20h
—————
Note 1
57
—————
Note 1
58
—————
Note 1
59
—————
Note 1
1550 nm
06h
56
60
16
4
2
Vendor PN
Vendor Rev.
Laser Wavelength
61
0Eh
62
1
Reserved
—————
00h
63
1
CC BASE
Check Code
Note 2
Notes:
1. These addresses are reserved for Vendor Revision.
2. Data Address 63 is the Check Sum for byte 0 to byte 62 (BASE ID FIELDS).
11
Table 12.- Serial ID: Data Fields - 2-Wire Address A0h (Continued)
EXTENDED ID FIELDS
Data Address
Field Size (Byte)
Name of field
Description of Field
Context (Hex)
64
2
Function
—————
00h
TX_DISABLE, TX_FAULT, RX_LOS
1Ah
65
66
1
BR, max.
Unspecified
00h
67
1
BR, min.
Unspecified
00h
68
16
Vendor S/N
Note 3
69
Note 3
70
Note 3
71
Note 3
72
Note 3
73
Note 3
74
Note 3
75
Note 3
76
Note 3
77
Note 3
78
Note 3
79
Note 3
80
Note 3
81
Note 3
82
Note 3
83
84
Note 3
8
Data Code
85
86
87
88
89
90
91
Year
(ASCII code)
Note 4
Digits of Month
(ASCII code)
Note 4
Day of Month
(ASCII code)
Note 4
Vendor Specific Lot Code
(ASCII code)
Note 4
Note 4
Note 4
Note 4
Note 4
92
1
Diagnostic
Monitoring Type
-Digital Diagnositic Monitoring-Inter- 68h
nally Calibrated-Average power
93
1
Enchanced
Option
-Alarm/Warning Flags ImplementedSoft TX_FAULT and RX_LOS Monitoring
F0h
94
1
SFF-8472
Compliance
Includes Functionality Described in
Rev 9.3 SFF8472
01h
95
1
CC_EXT
Check code for Extended ID Fields
Note 5
96-255
160
VENDOR SPECIFIC ID FIELDS
Notes:
3. These addresses are reserved for Vendor SN (serial number).
4. These addresses are reserved for date code information
5. Data Address 95 is the Check Sum for byte 64 to byte 94 (EXTENDED ID FIELDS).
12
00h
Digital Diagnostic Monitoring
2 wire serial bus address 1010001X (A2h) is used to access
measurement of transceiver temperature, internally measured supply voltage, TX bias current, TX optical output
power and RX optical input power which are shown in
Table 13. Each diagnostic parameter has a corresponding
high alarm, low alarm, high warning and low warning
threshold which are shown in Table 14. Alarm flags indicate conditions likely to be associated with an inopera-
tional link and cause for immediate action. Warning flags
indicate conditions outside the normally guaranteed
bounds but not necessarily causes of immediate link failures. It is recommended that detection of an asserted flag
bit should be verified by a second read of the flag at least
100 msec later. The detail contents of the 2 wire address
A2h are shown in Table 15 to 21.
Table 13. Diagnostic Parameters
Range
Diagnostic Parameter
Min.
Max.
LSB
Accuracy
Address
Note
Transceiver
Temperature(Temp)
-15
[ºC]
+105
[ºC]
1/256
[ºC]
±3
[ºC]
96-97
A 16 bit signed twos
complement value
Supply Voltage (Voltage)
+2.97
[V]
+3.63
[V]
100
[µV]
±3
[%]
98-99
A 16 bit unsigned integer
TX Bias Current (Bias)
0
[mA]
+95
[mA]
2.0
[µA]
±10
[%]
100-101
A 16 bit unsigned integer
TX Optical Output Power
(TX Power)
-6
[dBm]
+2
[dBm]
0.1
[µW]
±3
[dB]
102-103
A 16 bit unsigned integer
RX Optical Input Power (RX
Power)
-25
[dBm]
+3
[dBm]
0.1
[µW]
±3
[dB]
104-105
A 16 bit unsigned integer
Table 14. Alarm and Warning Thresholds
Warning
Alarm
Parameter
Unit
Low
High
Low
High
Transceiver Temperature
ºC
-5
+70
-10
+75
Supply Voltage
V
+3.1
+3.5
+3
+3.6
TX Bias Current
mA
5
80
3
90
TX Optical Output Power
dBm
-4
0
-7
+3
RX Optical Input Power
dBm
-21
0
-22
+1
13
Table 15. Alarm and Warning Thresholds (2-Wire Address A2h)
Address
# Bytes
Name
Description
00-01
2
Temp High Alarm
MSB at low address
02-03
2
Temp Low Alarm
MSB at low address
04-05
2
Temp High Warning
MSB at low address
06-07
2
Temp Low Warning
MSB at low address
08-09
2
Voltage High Alarm
MSB at low address
10-11
2
Voltage Low Alarm
MSB at low address
12-13
2
Voltage High Warning
MSB at low address
14-15
2
Voltage Low Warning
MSB at low address
16-17
2
Bias High Alarm
MSB at low address
18-19
2
Bias Low Alarm
MSB at low address
20-21
2
Bias High Warning
MSB at low address
22-23
2
Bias Low Warning
MSB at low address
24-25
2
TX Power High Alarm
MSB at low address
26-27
2
TX Power Low Alarm
MSB at low address
28-29
2
TX Power High Warning
MSB at low address
30-31
2
TX Power Low Warning
MSB at low address
32-33
2
RX Power High Alarm
MSB at low address
34-35
2
RX Power Low Alarm
MSB at low address
36-37
2
RX Power High Warning
MSB at low address
38-39
2
RX Power Low Warning
MSB at low address
40-55
16
Reserved
Reserved for future monitored quantities
14
Table 16. Calibration constants for External Calibration Option (2-Wire Address A2h)
Address
# Bytes
Name
Description
56-59
4
Rx_PWR(4)
Single precision floating point calibration data -Rx optical power. Bit 7 0
of byte 56 is MSB. Bit 0 of byte 59 is LSB.
60-63
4
Rx_PWR(3)
Single precision floating point calibration data -Rx optical power. Bit 7 0
of byte 60 is MSB. Bit 0 of byte 63 is LSB.
64-67
4
Rx_PWR(2)
Single precision floating point calibration data, Rx optical power. Bit 7
of byte 64 is MSB, bit 0 of byte 67 is LSB.
0
68-71
4
Rx_PWR(1)
Single precision floating point calibration data, Rx optical power. Bit 7
of byte 68 is MSB, bit 0 of byte 71 is LSB.
1
72-75
4
Rx_PWR(0)
Single precision floating point calibration data, Rx optical power. Bit 7
of byte 72 is MSB, bit 0 of byte 75 is LSB.
0
76-77
2
Tx_I(Slope)
Fixed decimal (unsigned) calibration data, laser bias current. Bit 7 of
byte 76 is MSB, bit 0 of byte 77 is LSB.
1
78-79
2
Tx_I(Offset)
Fixed decimal (signed two’s complement) calibration data, laser bias
current. Bit 7 of byte 78 is MSB, bit 0 of byte 79 is LSB.
0
80-81
2
Tx_PWR(Slope)
Fixed decimal (unsigned) calibration data, transmitter coupled output 1
power. Bit 7 of byte 80 is MSB, bit 0 of byte 81 is LSB.
82-83
2
Tx_PWR(Offset)
Fixed decimal (signed two’s complement) calibration data, transmitter 0
coupled output power. Bit 7 of byte 82 is MSB, bit 0 of byte 83 is LSB.
84-85
2
T(Slope)
Fixed decimal (unsigned) calibration data, internal module temperature. Bit 7 of byte 84 is MSB, bit 0 of byte 85 is LSB.
1
86-87
2
T(Offset)
Fixed decimal (signed two’s complement) calibration data, internal
module temperature. Bit 7 of byte 86 is MSB, bit 0 of byte 87 is LSB.
0
88-89
2
V(Slope)
Fixed decimal (unsigned) calibration data, internal module supply
voltage. Bit 7 of byte 88 is MSB, bit 0 of byte 89 is LSB.
1
90-91
2
V(Offset)
Fixed decimal (signed two’s complement) calibration data, internal
module supply voltage. Bit 7 of byte 90 is MSB. Bit 0 of byte 91 is LSB.
0
92-94
3
Reserved
Reserved
———
95
1
Checksum
Byte 95 contains the low order 8 bits of the sumof bytes 0-94.
———
15
Content
Table 17. A/D Values and Status Bits (2 Wire Address A2h)
Byte
Bit
Name
Description
Converted analog values. Calibrated 16 bit data
96
All
Temperature MSB
Internally measured module temperature.
97
All
Temperature LSB
98
All
Vcc MSB
99
All
Vcc LSB
100
All
TX Bias MSB
101
All
TX Bias LSB
102
All
TX Power MSB
103
All
TX Power LSB
104
All
RX Power MSB
105
All
RX Power LSB
106
All
Reserved MSB
Reserved for 1st future definition of digitized analog input
107
All
Reserved LSB
Reserved for 1st future definition of digitized analog input
108
All
Reserved MSB
Reserved for 2nd future definition of digitized analog input
109
All
Reserved LSB
Reserved for 2nd future definition of digitized analog input
Internally measured supply voltage in transceiver.
Internally measured TX Bias Current.
Measured TX output power.
Measured RX input power.
Optional Status/Control Bits
110
7
TX Disable State
Digital state of the TX_DISABLE Input Pin.
110
6
Soft TX Disable
Read/write bit that allows software disable of laser.
110
5
Reserved
110
4
RX Rate Select State
Digital state of the SFP RX Rate Select Input Pin.Not supported.
110
3
Soft RX Rate Select
Read/write bit that allows software RX rate select.Not supported.
110
2
TX Fault
Digital state of the TX_FAULT Output Pin.
110
1
LOS
Digital state of the RX_LOS Output Pin.
110
0
Data Ready Bar
Indicates transceiver has achieved power up and dataBit remains
high until data is ready to be read at whichdevice sets the bit low.
111
7-0
Reserved
Reserved.
16
Table 18. Alarm and Warning Flag Bits (2-Wire Address A2h)
Byte
Bit
Name
Description
Reserved Optional Alarm and Warning Flag Bits
112
7
Temp High Alarm
Set and latch when internal temperature exceeds high alarm level †
112
6
Temp Low Alarm
Set and latch when internal temperature is below low alarm level †
112
5
Vcc High Alarm
Set and latch when internal supply voltage exceeds high alarm level †
112
4
Vcc Low Alarm
Set and latch when internal supply voltage is below low alarm level †
112
3
TX Bias High Alarm
Set and latch when TX Bias current exceeds high alarm level †
112
2
TX Bias Low Alarm
Set and latch when TX Bias current is below low alarm level †
112
1
TX Power High Alarm
Set and latch when TX output power exceeds high alarm level †
112
0
TX Power Low Alarm
Set and latch when TX output power is below low alarm level †
113
7
RX Power High Alarm
Set and latch when Received Power exceeds high alarm level †
113
6
RX Power Low Alarm
Set and latch when Received Power is below low alarm level †
113
5
Reserved Alarm
113
4
Reserved Alarm
113
3
Reserved Alarm
113
2
Reserved Alarm
113
1
Reserved Alarm
113
0
Reserved Alarm
114
All
Reserved
115
All
Reserved
116
7
Temp High Warning
Set and latch when internal temperature exceeds high warning level †
116
6
Temp Low Warning
Set and latch when internal temperature is below low warning level †
116
5
Vcc High Warning
Set and latch when internal supply voltage exceeds high warning level †
116
4
Vcc Low Warning
Set and latch when internal supply voltage is below low warning level †
116
3
TX Bias High Warning
Set and latch when TX Bias current exceeds high warning level †
116
2
TX Bias Low Warning
Set and latch when TX Bias current is below low warning level †
116
1
TX Power High Warning
Set and latch when TX output power exceeds high warning level †
116
0
TX Power Low Warning
Set and latch when TX output power is below low warning level †
117
7
RX Power High Warning
Set and latch when Received Power exceeds high warning level †
117
6
RX Power Low Warning
Set and latch when Received Power is below low warning level †
117
5
Reserved Warning
117
4
Reserved Warning
117
3
Reserved Warning
117
2
Reserved Warning
117
1
Reserved Warning
117
0
Reserved Warning
118
All
Reserved
119
All
Reserved
† Latch state cleared on read, power cycle or the host toggles TX_DISABLE.
17
Table 19. Vendor Specific Memory Address and User EEPROM (2-Wire Address A2h)
Byte
# Byte
Name
Description
120-127
8
Vendor Specific
00h.
128-247
120
User EEPROM
User Writable EEPROM
248-255
8
—————
00h
Table 20. Bit weights (°C) for Temperature Reporting Registers
Most Significant Byte (Byte 96)
Least Significant Byte (Byte 97)
D7
D6
D5
D4
D3
D2
D1
D0
D7
D6
D5
D4
D3
D2
D1
D0
SIGN
64
32
16
8
4
2
1
1/2
1/4
1/8
1/16
1/32
1/64
1/128
1/256
Table 21. Digital Temperature Format
Temputer
BINARY
HEXADECIMAL
DECIMAL
FRACTION
HIGH BYTE
LOW BYTE
HIGH BYTE
LOW BYTE
+127.996
+127 255/256
01111111
11111111
7F
FF
+125.000
+125
01111101
00000000
7D
00
+25.000
+25
00011001
00000000
19
00
+1.004
+1 1/256
00000001
00000001
01
01
+1.000
+1
00000001
00000000
01
00
+0.996
+255/256
00000000
11111111
00
FF
+0.004
+1/256
00000000
00000001
00
01
0.000
0
00000000
00000000
00
00
-0.004
-1/256
11111111
11111111
FF
FF
-1.000
-1
11111111
00000000
FF
00
-25.000
-25
11100111
00000000
E7
00
-40.000
-40
11011000
00000000
D8
00
-127.996
-127 255/256
10000000
00000001
80
01
-128.000
-128
10000000
00000000
80
00
18
0
2 wire addrress 1010000X (A0h)
Serial ID Defined by
SFP MSA (96 bytes)
0
2 wire addrress 1010001X (A2h)
55
95
95
Vendor Specific
(32 bytes)
Cal Constants
(40 bytes)
Real Time Diagnostic
Interface (24 bytes)
119
127
127
Alarm and Warning
Thresholds (56 bytes)
Vendor Specific (8 bytes)
User Writable EEPROM
(120 bytes)
Reserved in SFP MSA
(128 bytes)
247
255
255
Vendor Specific (8 bytes)
Figure 11. Serial ID and Digital Diagnostic Memory Map
Timing Characteristics of Serial ID/DDM
The timing characteristics of the serial ID /DDM are listed in Table 22 and Figure 12.
Table 22. Timing Characteristics of Serial ID / DDM
Parameter
Symbol
Min
Max
Unit
SCL Clock Rate
f_clock
.
100
kHz
BUS Free Time between STOP and
START Condition
tBUF
4.7
.
µs
START Condition Hold Time
tHD:STA
4.0
.
µs
START Condition Setup Time
tSU:STA
4.7
.
µs
Low Period of SCL Clock
tLOW
4.7
.
µs
High Period of SCL Clock
tHIGH
4.0
.
µs
Data Hold Time
tHD:DAT
0
.
ns
Data Setup Time
tSU:DAT
250
.
ns
Rise Time
tR
.
1.0
µs
19
SDA
tBUF
SCL
tHIGH
tHD:STA
STOP
tHD:STA
tF
tR
tLOW
tSU:STA
tSU:DAT
START
tHD:DAT
SDA
D0
tSU:STO
REPEATED
START
ACK
tWR
WORDn
SCL
STOP Condition
START Condition
Figure 12. Serial ID and DDM Timing
Host Board
SFP Module
TD+
LASER
DRIVER
Protocol Vcc
100 ohm
TD-
4.7k-10k ohm
TX_FAULT
TX_DISABLE
Recommended
Power Supply Filter
1 uH
VeeT
VccT
10 uF
VccR
0.1 uF
+3.3 V
1 uH
0.1 uF
VeeR
PREAMP
&
POSTAMP
PROTOCOL
IC
10 uF
0.1 uF 10 uF
Note 1
SERDes
IC
RD+
100 ohm
RDRX_LOS
RATE_SELECT
+3.3 V
4.7k-10k ohm
4.7k-10k ohm
SERIAL ID
&
DDM
4.7k-10k ohm
MOD_DEF[0]
MOD_DEF[1]
PLD/PAL
MOD_DEF[2]
4.7k-10k ohm
Note 1: Consult the SERDES manufacturer for the termination method.
Figure 13. Recommended Power Supply Filter and Example of SFP Host Board Schematic
20
Connectors and Cables
Laser Eye Safety
The optical interface of the AFCT-57V6NSZ is a duplex LC
connector which is described in TIA/EIA FOCIS document
[5]. PC-polished ferrules are recommended in mating
cables for the AFCT-57V6NSZ.
The Avago Technologies AFCT-57V6NSZ module is a Class
1 laser product under the requirements of IEC 608251:1993+A1:1997+A2:2001 and U. S. 21 CFR 1040.10 and
1040.11 except for deviations pursuant to Laser Notice
No. 50, dated July 26, 2001, when used as specified by
Avago. Class 1 products are considered to be safe.
The electrical connection is provided by a card edge
connector which mates with a corresponding socket [1].
In addition the transceiver fits a cage assembly [1] which
also functions as an EMI shield. Contact an Avago sales
office for cable, electrical connector, cage and accessory
ordering information.
Caution -Use of controls or adjustment or performance
of procedures other than those specified herein may
result in hazardous radiation exposure. Any modification, adjustment, or use of the AFCT-57V6NSZ module
not specified by Avago may void the certification of the
product and constitute an act of new manufacturing of
a laser product under 21 CFR Subchapter J, and as such
will require recertification by the new manufacturer. This
includes operation beyond the Absolute Maximum Ratings listed in Table 2.
Physical Description
Figure 14 shows the mechanical outline of the Avago
AFCT-57V6NSZ SFP. For a complete description of the
footprint standards, refer to the MSA specification [1].
AVAGO
21CFR(J) CLASS1
AFCT-5745xxxZ
####nmLASER PROD
COUNTRY OF ORIGIN YYWW
S/N:########
14±0.1
[0.551±0.004
1,48
[0.058]
6,25±0.05
[0.246±0.002]
TX
55,5±0.20
[2.158±0.008]
13,2±0.1
[0.516±0.04]
12.7±0.1
[0.500±0.004]
RX
15.5
[0.610]
AREA FOR DUST CAP
8.45±0.1
[0.333±0.004]
+0,1-0
14,46
[0.569]
13,7±0.1
[0.539±0.004]
Figure 14. AFCT-57V6NSZ Mechanical Outline Drawing
21
Notes:
1. Bail delatch is colored BLUE for
SONET/Single-Mode Identification.
3,5±0.3
[0.14±0.01]
PCB
41,73±0.5
[1.64±0.02]
15 MAX
[0.59]
CAGE ASSEMBLY
9,8 MAX
[0.39]
1,7±0.9
[0.07±0.4]
BEZEL
AREA
FOR
DUST CAP
11.6 REF
[0.46]
0,35 REF
[0.01]
BELOW PCB
10 REF
[0.39]
TO PCB
15,25±0.1
[0.60±0.004
16.25±0.1
[0.64±0.004]
MIN PITCH
10,4±0.1
0.41±0.004
MSA SPECIFIED BEZEL
Notes:
1. Bail delatch is colored BLUE for
SONET/Single-Mode Identification.
DIMENSION ARE IN MILLIMETERS [INCHES]
Figure 15. Mounting drawing
Regulatory Information
References
This product is under testing with respect to American
and European product safety and electromagnetic compatibility regulations. For further information regarding
regulatory certification, refer to the SFP Regulatory Specification [7] and SFP Application Note [6], or contact the
Avago sales office.
[1] Small Form-factor Pluggable (SFP) Transceiver Multi
Source Agreement, September 14, 2000
[2] IEEE 802.3z Media Access Control (MAC) Parameters,
Physical Layer, Repeater and Management Parameters
for 1000Mb/s Operation.
[3] SFF-8472, Digital Diagnostic Monitoring Interface
for Optical Transceivers, Draft Revision 9.3, August 1,
2002
[4] A. Widmer & P. Franaszek, “A DC-balanced, partitionedblock, 8B/10B transmission code “IBM Journal of
Research & Development”, Vol. 27, No. 5, Pg. 440-451,
(Sept. 1983).
[5] TIA/EIA-604-10, “FOCIS 10, Fiber Optic Connector Intermateability Standard”, 1999
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 in the United States and other countries.
Data subject to change. Copyright © 2005-2009 Avago Technologies. All rights reserved. Obsoletes AV01-0655EN
AV02-0620EN - April 14, 2009