AN-654
APPLICATION NOTE
One Technology Way • P.O. Box 9106 • Norwood, MA 02062-9106 • Tel: 781/329-4700 • Fax: 781/326-8703 • www.analog.com
Optical Module Development Platform
2.5 Gbps Transmitter with Digital Diagnostics
By Luca Vassalli and Mark Malaeb
FEATURES
Development Platform for SFF-8472
Digital Diagnostics and Control (ADuC832/ADuC842*)
3.2 Gbps Laser Diode Driver (ADN2847)
1310 nm FP Laser LC TOSA
Triple Digitally Controlled Potentiometer (ADN2860)
Flexible Control Loop Options
Interface Software
Dual/Triple I2C® Address Support
64 kB Program Flash, 4 kB Data Flash, 256 Byte EEPROM
3.3 V Single-Supply Operation
Schematics and BOM
Layout with Gerber Files Available
The ADuC832/ADuC842 MicroConverters® add a number of functionalities to the system, such as SFF-8472
compliant enhanced digital diagnostics and alternative
control loop algorithms, and can be used to support
feature-rich modules.
APPLICATIONS
OC3–OC48, FC, GBE Optical Transmitters
GBIC, SFP and SFF Transmitter Evaluation
Digital Diagnostics Development Platform
GENERAL DESCRIPTION
The SFP Digital Diagnostics Development Board is a
platform designed to enable optical module designers to
develop SFP and SFF compliant transceivers with digital
diagnostics. The same platform can be used to develop
the digital diagnostics section for other 2-wire based ID
and diagnostics functions, such as the ones found in
GBIC, 300 pin MSA, XFP, and other optical MSAs.
The development platform includes a development
board with an SFP-like layout, an auxiliary SFP cage
and connector for final module evaluation, source code
to communicate to the I2C interface through an extension
board, schematics, bill of material, and layout recommendations.
The ADN2847 dual loop laser diode driver (LDD) drives
an ac - coupled laser diode assembled in a low cost
TOSA can. The ADN2860 digital potentiometer is used
to independently control the extinction ratio and average
power set points. The ADN2860 also includes EEPROM
compliant with the extension to the GBIC serial ID specifications. These two devices allow the development of
basic optical GBIC modules.
*ADuC842 pin/code compatible future product
REV. 0
SFP Development Board
INCLUDES
Schematics and Layout of SFP Development Board
Software for ADuC832
Supporting Documents
ADN2847 Data Sheet
ADN2860 Data Sheet
ADuC832/ADuC842 Data Sheet
TN012: ADN2847 32L Optical AC Evaluation Board
TN017: ADN2841 Burst Mode Application
SFP MSA Agreement
SFF-8472 Draft Rev x.x
DESIGN REVIEW
This section describes the basic operation of each IC on
the board and discusses optional functions that can be
supported. The design is primarily targeted for SFF-8472
implementation. Reference to the digital diagnostics will
be consistent with this particular MSA, but its implementation can be applicable to other 2-wire based digital
diagnostics implementations. For more information on
the specific registers of the MSAs, refer to the published
document.
AN-654
The system as shown in Figure 1 is designed around a
MicroConverter that handles both the digital interface
and the analog parameters monitoring. Although a set
of codes is available with this board, the design is set
up to allow the user to develop their own codes and
download it into the MicroConverter through either the
UART or the emulator port. The design is focused on the
transmitter side as most of the diagnostics is performed
on or around the laser.
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ADN2860
The ADN2860 is a low tempco 3-channel digital potentiometer (2 ¥ 512 + 1 ¥ 128 positions) with 256 bytes
of user EEPROM. This device is hardwired to respond
to addresses A0h and 58h. Address A0h contains the
serial ID information and other static information regarding the module that the vendor specifies (Table I). This is
used to support the basic GBIC requirements and the
extended SFF-8472 requirements at the first 2-wire address
(by default address A2 is handled by the ADuC832).
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The digital potentiometer controls the extinction ratio,
average power set points, and end-of-life thresholds for
the laser driver (ADN2847). The potentiometer responds
to I2C address 58h and is typically programmed at manufacturing to set the desired laser operating point. The
RDAC values can be overwritten to RAM to adjust the
laser driver settings, but typically these settings are
write protected. By default, to allow the user to experiment, the ADN2860 is NOT write protected, so if these
values are overwritten on the RDAC EEPROM, the original data will be lost. The code on the ADuC832 can be
modified to enable this protection.
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Channel 0 controls the laser bias current threshold
(failure or end-of-life indication), Channel 1 controls the
average output power set point, and Channel 2 controls
the extinction ratio set point.
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For more information on register configuration for the
ADN2860, refer to the device’s data sheet. The appendix lists the most useful commands. For information on
the SFF-8472 register configuration, refer to the MSA
document.
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Figure 1. Block Diagram
Table I. SFF-8472 Digital Diagnostics Memory Map
2-Wire Address1010000X (A0h)
2-Wire Address1010001X (A2h)
0
0
ALARM AND WARNING
THRESHOLDS (56 BYTES)
SERIAL ID DEFINED BY
SFP MSA (96 BYTES)
55
CAL CONSTANTS
(40 BYTES)
95
95
REAL TIME DIAGNOSTIC
INTERFACE (24 BYTES)
VENDOR SPECIFIC
(32 BYTES)
119
VENDOR SPECIFIC (8 BYTES)
127
127
USER WRITABLE
EEPROM (120 BYTES)
RESERVED IN SFP MSA
(128 BYTES)
247
VENDOR SPECIFIC (8 BYTES)
255
255
–2–
REV. 0
AN-654
laser, as the driver will maintain control of ER over varying slope efficiency of the laser due to either temperature
or aging effects.
ADuC832/ADuC842
The MicroConverter is used to perform the monitoring
and control of the key parameters in the module. The
device includes an 8-channel 12-bit A/D converter, a temperature sensor, two 12-bit voltage output DACs, and an
8052 core that can operate without an external XTAL.
The driver also monitors the bias current and detects
failure conditions. The control loop set points are programmed on the ADN2860, while the ADuC832 reads the
monitored parameters.
Memory space is divided into 62K of flash program
space, 4K of flash data space and 2K + 256 bytes of RAM.
The MicroConverter responds to the I2C address A2h
corresponding to the SFF-8472 digital diagnostics EEPROM
space (Table I). The software included with the device
enables an external master to read the EEPROM through
the I2C interface and retrieve the relevant diagnostics
information, module status, and perform software
enabled functions such as software shutdown or software monitored LOS.
The driver can supply up to 100 mA of bias current and
80 mA of modulation current. For more information on
the ADN2847 and other parts in this family, refer to the
respective data sheets and published technical notes.
SOFTWARE
Part of the software for the ADuC832 has been developed and is available from the authors upon request. The
main functions performed by the MicroConverter are to
enable the LDD, monitor the laser parameters, and communicate with an external master through the I2C. The
software also includes a routine that allows the display
of the requested parameter values on a PC through the
RS-232 port.
The monitored parameters are: VCCT, VCCR, IBIAS, IMOD,
TX power, temperature, and a provision to monitor the
RSSI from the receiver side of the module. They can be
read through the 2-wire interface at location 96d (60h)
to 119d (77h) of the A2h table. The associated alarms
and warning thresholds are programmable at location
0 to 55d (37h). The flexible MicroConverter based design
permits the implementation of an internally calibrated
diagnostics system and does not require calibration
constant to be used. The temperature sensor can also
be used to perform temperature dependent compensation of the LDD settings or alarms.
Following are examples of the main routines necessary
to perform these tasks.
Accessing the ADC and Storing Data into Memory
The digital diagnostics portion of the code uses the
on-board ADC to measure the module’s supply voltage,
its temperature, and the LD bias current (voltage across
the monitoring resistor). Output power and modulation
current can also be measured but the code has not been
added yet. As these values are measured they are saved
into data memory space. To avoid too many memory
writes, these values are stored/updated only as the
request for these values is issued through the I2C. The
smallest memory page size is four words. However, the
software is able to update one word at a time through a
software mask.
The design using the ADuC842 enables both I2C addresses
to be covered by the MicroConverter and in most cases
eliminates the need for the ADN2860.
Another advantage of using a MicroConverter based
design is the ability to add additional features such as
control loop and monitoring functions for APD receivers
and cooled or wavelength controlled lasers. The
ADuC842 is a single-cycle per instruction core and is
ideal for these expanded features.
Accessing the Memory Locations Through the I2C
The MicroConverter is configured as a slave on the I2C
bus with address A2h, as per the GBIC requirements.
Data can be read from a specific address by first performing a write command to that address with no data.
Next, when a read is performed, data is read from the
previously set address location.
ADN2847
The ADN2847 is a multirate (up to 3.2 Gbps) dual loop
laser driver. It is used to directly drive an ac-coupled FP
laser. The laser driver controls both the average output
power and the extinction ratio over temperature and
over the lifetime of the laser. This active control of both
extension ratio and output power enables the module
designer to cut down the time spent characterizing the
REV. 0
The appendix shows the most useful commands to
access the I2C interface from the external master.
–3–
AN-654
The EEPROMs should contain a sample of data according to the SFF-8472 standard; when the MicroConverter
is enabled, it performs the digital diagnostics and other
monitoring functions. The LDD performs a dual loop
control function so that the board can be powered and
used without downloading codes every time. Following
these instructions will allow the user to transmit optical
data in addition to read and write to the I2C accessible
registers.
SCHEMATICS AND BOM
Schematics and BOM are available at the end of this
document. Figure 1 shows a block diagram of the SFP TX
section, while the schematics (Figures 2, 3, and 4) enable
the user to develop the board.
A few stuffing options are available for the user to experiment. Here is a summary of these options (Option 1 is
preferred):
1. LDD set by digital potentiometer, classic configuration:
Before starting, make sure you have all necessary
components and equipments.
Uses ADuC832, ADN2847, and ADN2860. ADN2860
controls PSET, ERSET, and ASET through R34, R35,
and R36. R54 and R55 are not stuffed. R58 and R59
are not stuffed. Both ADN2860 and ADuC832 handle
the I2C communication.
1. SFP Digital Diagnostics Development Board
2. 3.3 V regulated power source
3. I2C-to-PC interface board (WIN-I2CNT) available at
www.demoboard.com
2. LDD set by MicroConverter:
Uses ADuC842, ADN2847. ADN2860 not used.
ADuC842 controls PSET and ERSET through R34 and
R35. R54 and R55 are 0 W. R36 connected to ASET and
GND. R58 and R59 are not stuffed. ADuC842 handles
both I2C addresses.
4. PC with WIN-I2CNT board software installed. Alternatively, other I2C utilities can be used.
5. Differential signal generator (data source) set to
500 mV p-p single-ended or 1 V p-p differential
6. Optical data analyzer (optional)
3. MicroConverter forces LDD in open loop. MicroConverter handles control loop:
Then proceed with the following steps:
1. Connect the WIN-I2CNT board to the PC
Uses ADuC842, ADN2847. ADN2860 not used. ADuC842
controls PAVCAP and ERCAP through R58 and R59.
R54 and R55 not stuffed. R34 and R35 0 W to GND,
R36 connected to ASET and GND. ADuC842 sets PAV
and ER based on reading of IMOD and IBIAS. These two
parameters are both monitored and controlled at
the same time. The dual loop functionality of the
ADN2847 is disabled. ADuC842 handles both I 2 C
addresses.
2. Install the I2C support software
3. With the SFP development board set to disable
(JP2 and JP8 Pins 3 and 4 connected through jumper
or floating), connect the 3.3 V and GND power to the
SFP board (JP1) and the WIN-I2CNT board (any of the
JP3, JP4, or JP5)
4. Connect the I2C interface of the development board
(labeled SDA and SCL on WINI2C and SFP board)
QUICK START INSTRUCTIONS
A limited number of evaluation systems is available
to selected customers. The schematics offered in this
application note allow the user to design the board
(schematics, layout, and gerber files are available upon
request). Once the board is manufactured, follow these
instructions:
5. Connect the data source to the development board
Start with a factory preprogrammed configuration. On a
blank board, download the code to the ADuC832/ADuC842.
To modify the ADuC8xx code, a software update through
the UART or emulator interface is necessary; QuickStart
development tools for the MicroConverter are available
at www.analog.com/microconverters.
The board contains data on I2C addresses A2h, A0h
(SFF standard registers), and 58h (ADN2860 digital
potentiometer settings). For details about these registers, see the Design Review section.
6. Enable TX (JP2 Pins 2 and 3 connected through
jumper)
7. Run the I2 C communication software to read and
write into the EEPROM locations. See the appendix
for useful commands.
–4–
REV. 0
AN-654
APPENDIX
Most Useful ADN2860 Commands
Extinction Ratio (RDAC2)
I2C Address W Data
Increase Resistance 2¥
Decrease Resistance 2¥
Increase One Step
Decrease One Step
Save Settings
Read DAC Settings
I2C Address
R
Data
58
R
7 BITS
I2C Address W Data
I2C Address
R
Data
58
58
58
58
58
58
58
58
58
58
R
R
8 LSB +1 MSB
RDAC0L RDAC0M RDAC1L RDAC1M RDAC2
I2C Address W Data
I2C Address
R
Data
58
58
58
58
58
58
58
58
R
8 LSB +1 MSB
58
58
58
58
58
58
W
W
W
W
W
W
9C
C4
AC
D4
94
04
Average Power (RDAC1)
Increase Resistance 2¥
Decrease Resistance 2¥
Increase One Step
Decrease One Step
Save Settings MSB
Save Settings LSB
Read DAC Settings
Read all RDAC Settings
W
W
W
W
W
W
W
W
9A
C2
AA
D2
92
93
02
00
End of Life Bias Current Threshold (RDAC0)
Increase Resistance 2¥
Decrease Resistance 2¥
Increase One Step
Decrease One Step
Save Settings MSB
Save Settings LSB
Read DAC Settings
W
W
W
W
W
W
W
98
C0
A8
D0
90
91
00
Most Useful Digital Diagnostic Commands
Read Temperature
Read VCC
Read TX Bias
Read TX Power
Read RX Power
REV. 0
I2C Address W Field
I2C Address R
Data
A2
A2
A2
A2
A2
A2
A2
A2
A2
A2
A2
A2
A2
A2
A2
A2
A2
A2
A2
A2
MSB
LSB
MSB
LSB
MSB
LSB
MSB
LSB
MSB
LSB
W
W
W
W
W
W
W
W
W
W
60
61
62
63
64
65
66
67
68
69
R
R
R
R
R
R
R
R
R
R
–5–
JP1
1
2
3
4
GND
4 PIN HEADER
–6–
C5
0.1F
L2
R18
25
3
2
1
LED
C7
22F
VCCR2
C8
22F
1H POWER INDUCTOR
COILCRAFT 0805PS
C6
0.1F
D1
C2
0.1F
HEADER3
JP3
C1
10F
1H POWER INDUCTOR
COILCRAFT 0805PS
R19
25
VCCT2
L3
VCC
MOUNTING HOLE
MOUNTING HOLE
MH4
MOUNTING HOLE
MH3
MOUNTING HOLE
MH2
MH1
VCC
VCC1
C3
0.1F
C4
22F
VCC1
3
2
1
HEADER3
JP7
VCC2
HEADER3
3
2
1
JP9
1
2
3
4
JP8
R14
10k
HEADER
1
2
JP6
P4
SMA
P3
SMA
4 PIN HEADER
VCCT2
SW-PB
SW1
R22
1k
1
2
3
4
RxD
TxD
RESET
TX_FAULT
TX_DISABLE
SDA
SCL
MOD SEL
PSEN
LOS
P5
SMA
P2
SMA
P6
SMA
VCCR2
VCCT2
VCC1
P1
SMA
TxD+
TxD–
VCC1 JP2
4 PIN HEADER
VCC1
R13
R11
R12
4.7k 4.7k 4.7k
VCCT2 VCCT2 VCCT2
VCC1
HEADER4
4
3
2
1
JP4
R7
4.7k
VCC1
R6
4.7k
VCC1
R5
4.7k
VCC1
R1
50
1H POWER INDUCTOR
COILCRAFT 0805PS
L1
R2 25
TxD+
TxD–
RxD
TxD
RESET
PSEN
LOS
TX_FAULT
TX_DISABLE
SDA
SCL
J2 FORCED LAYOUT
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
MOLEX SFP
CONNECTOR
J1 ONBOARD CONNECTOR
MOLEX SFP
CONNECTOR
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
R20
10k
Q2
MAIN BOARD
2N7002
Q6
2N7002
Q5
2N7002
Q4
2N7002
Q3
2N7002
VCCT2
R15
10k
Q1
2N7002
VCCT2
R8
10k
VCC1
R3
10k
VCC1
50
R21
50
R17
50
R16
50
R10
50
R9
50
R4
LED
D7
LED
D6
LED
D5
LED
D4
LED
D3
LED
D2
VCCT2
VCC1
AN-654
Figure 2. Main Board
REV. 0
AGND
GND
LBWSET
PAVCAP
ERCAP
TXD –
TXD +
LBWSET
C14
1F
PAVCAP
TXD –
TXD +
C17
1F
C16
0.1F
C15
0.1F
17
15
16
13
12
1
CLKSEL
CLK +
CLK –
DATA IN +
DATA IN –
10
Figure 3. High Speed Section
R37
1k
7 14 22 29 30 24
23
11
U3
R38
1k
C20
0.01F
2
3
IMPD
CCBIAS
BIAS
IMODP
GND2
IMODN
C21
0.01F
IBMON
IMMON
IMPDMON
5
32
31
28
27
26
C13
0.1F
VCCLASER
18 19 20
R34
R35
R36
1.0k 1.0k 1.0k
R39
1k
6 4
L12
TOKO FSLB2520-220K
21 25
ADN2847
8
9
C18
0.01F
C19
0.01F
C12
0.1F
IBMON
ERCAP
LBWSET
VCC1
VCC1
TOKO FSLB2520-220K
PAVCAP
GND2
GND2
ERCAP
IMMON
VCC4
IMPDMON
PSET
C11
0.1F
GND
GND1
GND3
VCC3
ERSET
L11
DEGRADE
VCC1
VCC2
ASET
–7–
ALS
REV. 0
FAIL
VCC1
R32
82
DEGRADE
TX_FAULT
ALS
IBMON
IMMON
IMPDMON
PSET
ERSET
ASET
R31
25
PSET
ERSET
ASET
L13
C22
0.1F
C23
10nF
R40
50
MURATA BLM18AG601SN1
DEGRADE
TX_FAULT
ALS
L14
PIN 3 TO CAN
TOP SIDE OF PCB
MURATA
BLM18AG601SN1
R33 PIN 2 TO CAN
18 TOP SIDE
LS1
DIODE_LASER
PIN 4 OF TO CAN ON THE
BOTTOM SIDE OF PCB
AN-654
PAVCAP
ERCAP
ERSET
PSET
PAVCAP
ERCAP
ERSET
IMMON
R59
1k
R57
100k
R56
100k
VCC LASER
C51
0.1F
0.1F
C52
0.1F
3
IBMON
VCC1
2
IMMON
DAC1
DAC0
VREF
CREF
AGND
AGND
AGND
AVDD
AVDD
P1.3/ADC3
P1.2/ADC2
P1.1/ADC1/T2EX
TxD
RxD
RESET
P0.6/AD6
RESET
P0.5/AD5
P3.0/RxD
ADuC832
U2
TX_FAULT
RxD
TxD
TX_DISABLE
LOS
RESET
VCC1
EA
DEGRADE
ALS
TX_FAULT
TX_DISABLE
LOS
DEGRADE
ALS
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
PSEN
LBWSET
SDATA
P2.0/A8/A16
P2.1/A9/A17
P2.2/A10/A18
P2.3/A11/A19
EXTAL1
EXTAL2
DVDD
DGND
DGND
P2.4/A12/A20
P2.5/A13/A21
P2.6/PWM0/A14/A22
P2.7/PWM1/A15/A23
15 16 17 18 19 20 21 22 23 24 25 26 27 28
P3.1/RxT
P0.7/AD7
P1.7/ADC7
P1.4/ADC4
14 P1.5/ADC5/SS
13
12
11
C53 10
9
8
7
6
5
4
1
IMPDMON
P0.4/AD4
56 55 54 53 52 51 50 49 48 47 46 45 44
DVDD
P3.2/INT0
R52
100k
DGND
P3.3/INT1/MISQPWM1
IMPDMON
IBMON
R58
1k
R55
1k
R54
PSET 1k
GND
VCC1
P0.3/AD3
DVDD
VCC1
LBWSET
C54
CAP
VCC1
DGND
SDA
SCL
WP
RE
U1
ADN2860
A1R
8
A2
7
SCL
SDA
ERSET
9 10 11 12
W2
6 VSS
5
4
3
2
1
A0R
24 23 22 21 20 19
A0EE
B2
R51
100k
P0.2/AD2
DGND
A1EE
A1
AGND
RSSIOMA
RSSIOMA
P0.1/AD1
P3.4/T1/CONVST
ALE
P3.6/WR
P1.0/ADC0/T2
P1.6/ADC6
–8–
SCLK
P0.0/AD0
P3.5/T0/PMWC/PWM0/EXTCLK
PSEN
P3.7/RD
NC
W1
NC
NC
B0
WO
A0
VDD
NC
B1
VCC1
SCL
SDA
ERSET
ASET
13
14
15
16
17
18
ASET
VCC1
AN-654
Figure 4. Control and Diagnostics
REV. 0
AN-654
Table II. Bill of Materials
Item
Qty.
Reference
Description
Manufacturer
Mfgr P/N
1
1
C1
CAP TANT CASE-B
10 mF 6.3 V 10%
KEMET
T491B106K006AST
2
4
C2, C3,
C5, C6
KEMET
C0603C104Z4VACTU
3
3
C4, C7, C8
CAP 0603 CERM 0.1 mF Z5U
16 V +80/–20%
CAP TANT CASE-B
22 mF 6.3 V 10%
KEMET
T491B226K006AS
4
4
C18, C19,
C20, C21
5
8
6
3
C11, C13, C15,
C16, C22, C51,
C52, C53
C12, C14, C17
7
7
8
1
D1, D2, D3, D4,
D5, D6, D7
J1
9
1
J2
10
1
JP6
CONN T.H. HEADER 2 ¥ 1
Male 0.1” SP STR
Sullins
Electronics
PZC36DAAN
11
3
JP3, JP7, JP9
CONN T.H. HEADER 3 ¥ 1
Male 0.1” SP STR
Sullins
Electronics
PZC36DAAN
12
4
JP1, JP2,
JP4, JP8
CONN T.H. HEADER 4 ¥ 1
Male 0.1” SP STR
Sullins
Electronics
PZC36DAAN
13
3
L1, L2, L3
Coilcraft
DS1608C-102
14
15
2
2
L11, L12
L13, L14
TOKO
Murata
FSLB2520-220K
BLM18AG601SN1
16
1
LS1
IND 1608 1 mH Power
Inductor
IND 1210
IND 0603 EMIFIL for
DC 600 W
Laserdiode T.H. 3 PINS
17
6
6
CONN T.H. SMA BNC
Connector 5 PINS
MOSFET SOT-23 N-CH
60 V 7.5 W
LD1310-134- 4-2-C0110
SLT2276-LN
SLT2276-LN
SASF55ZGT-6
18
Fairchild
2N7002
19
3
P1, P2, P3,
P4, P5, P6
Q1, Q2, Q3, Q4,
Q5, Q6
R37, R38, R39
INFOMAX
Sumitomo
Excelight
Lighthorse
RES 0201 1 kW 1/20W 5%
Panasonic
ERJ-1GEJ103C
20
3
R34, R35, R36
RES 0201 1 kW 1/20W 5%
Panasonic
ERJ-1GEJ152C
21
1
R33
RES 0402 18 W 1/16W 5%
Panasonic
ERJ-2GEJ180X
REV. 0
CAP 0201 CERM 0.01 mF X5R Panasonic
6.3 V 10%
BC
CAP 0402 CERM 0.1 mF
Components
Y5V 16 V +80/–20%
ECJ-ZEB0J103K
CAP 0603 CERM
1 mF 6.3 V X5R 10%
LED T.H.
Panasonic
ECJ-1VB0J105K
Lite-On
Electronics
Molex
S270CKT
CONN SMT SFP
Connector
IDC20 Forced Layout SFP
Electrical Connector1
–9–
Stuffing
0402F104Z160BT
74441-0010
Onboard
AN-654
Table II. Bill of Materials (continued)
Item
22
Qty.
1
Reference
R32
Description
Mfgr P/N
9C06031A82ROJLHFT
RES 0201 100 kW 1/20W 5%
Manufacturer
Yageo
America
Yageo
America
Panasonic
23
4
R2, R18, R19, R31 RES 0603 25.5 W 1/16W 1%
24
4
25
7
26
5
27
6
28
1
R51, R52,
R56, R57
R1, R4, R9,
R10, R16,
R17, R21
R3, R8, R14
R15, R20
R5, R6, R7,
R11, R12, R13
R22
RES 0603 56 W 1/16W 5%
Panasonic
ERJ-3GEYJ560V
RES 0603 10 kW 1/16W 1%
Panasonic
ERA-3YEB103V
RES 0603 4.7 kW 1/16W 5%
Yageo
America
Yageo
America
E-Switch
9C06031A4701JLHFT
29
1
SW1
30
1
U1
31
1
U2
32
1
U3
33
34
35
1
1
1
C54
C23
R40
SWITCH TACT 6 ¥ 3.5 MM
H = 4.3 MM 130GF
IC SMT LFCSP24 NV Triple
Digital Potentiometer with
EEPROM I2C
IC SMT LFCSP56 MicroConverter with 62 kB MCU
IC SMT LFCSP32 2.5 G Dual
Loop Laser Driver
32 kHz Watch Crystal
CAP 0201 10 nF
ADI
ADN2860
ADI
ADUC832
ADI
ADN2847
36
4
R54, R55,
R58, R59
RES 0603 82 W 1/16W 5%
RES 0603 1.1 kW 1/16W 5%
Stuffing
9C06031A25R5FKHFT
ERJ-1GEJ104C
9C06031A1101JLHFT
TL1107AF130W
RES 0201 50 W
NI
NI
NI
RES 0201 1 kW
NI
ECJ-ZEB0J103K
NI = Not Installed
–10–
REV. 0
–11–
E03716–0–7/03(0)
Purchase of licensed I2C components of Analog Devices or one of its sublicensed Associated Companies conveys a license for the purchaser under the Philips
I2C Patent Rights to use these components in an I2C system, provided that the system conforms to the I2C Standard Specification as defined by Philips.
© 2003 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective companies.
–12–