SY88973/SY89307/MIC3001-Based SFP Module

SY88973/SY89307/MIC3001-Based
SFP Module
TXRX_307_R0 Evaluation Board
General Description
Features
This evaluation board is an implementation of the
SFP module in a different form factor with on board
faults indicators (LEDs) and a DB-25 connector for
serial communication. The design uses Micrel’s
MIC3001 controller, SY89307 VCSEL driver, and
SY88973 limiting amplifier. A picture of the fully
bonded board is shown below.
• Allows for easy and fast evaluation of Micrel’s
chipset for SFP module
Data sheet and support documentation can be found
on Micrel’s web site at www.micrel.com.
• SY89307: Low power, small form factor
(2mmx2mm) VCSEL driver up to 2.5Gbps data
rate.
Related Support Documentation
• MIC3001 Data Sheet
• SY89307 Data Sheet
• SY89973 Data Sheet
• MIC3000/1 Software User’s Guide
• On board FAULTs indicators
• Easy access to the components for rework and
different options implementation
ICs Description
• MIC3001: SFP module controller featuring digital
diagnostic monitoring interface per SFF-8472 with
internal/external calibration and full laser control
with bias and modulation current compensation for
temperature variations using look-up tables.
• SY88973: Multi-rate 155Mbps to 3200Mbps low
sensitivity limiting amplifier.
______________________________________________________________________________
Evaluation Board
DRIVER
INPUT
DRIVER
INPUT
September 2004
ROSA
ROSA
To Computer Parallel Port
To Computer Parallel Port
TOSA
TOSA
DFB / FP
VCSEL
L.A.
OUTPUT
L.A.
OUTPUT
M9999-092304
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Micrel
TXRX_307_R0 Evaluation Board
Receiver Sensitivity and Hysteresis Setting
SY88973 Limiting Amplifier
Evaluation Setting
Default Setting
The board comes with the driver set to drive a
common anode VCSEL differentially. Table 1 shows
the modifications to make on the board for different
configurations.
Configuration
Remove
Install
Common
Anode
Differential
R22, R45,
R46, R24, R32
R15, R19, R36,
R48, C9, L2
Common
Anode Single
Ended
R22, R45,
R46, R24,
R32, R8, C36
R15, R19, R36,
R48, C9, L2
Common
Cathode
Differential
R15, R19,
R36, R48, C9,
L2
R22, R45, R46,
R24, R32
Common
Cathode
Single Ended
R15, R19,
R36, R48, C9,
L2
R22, R45, R46,
R24, R32, R8, C36
The SY88973 is the default limiting amplifier. It has a
receive signal LOS indicator. To improve the
hysteresis on the receive signal LOS, install R47 (0)
and R43. The combination of R43 and R41 will
determine the sensitivity of the transceiver and
hysteresis on the receive signal LOS. Refer to the
application note entitled “Notes on Sensitivity and
hysteresis in Micrel’s Post Amplifiers” available at:
http://www.micrel.com/product-info/app_hints+notes.shtml.
SY88843 Limiting Amplifier
The SY88843 can also be installed on the board. It
has a signal detect SD indicator. To improve the
hysteresis on the receive signal LOS, remove R47
(0) and install R43, Q2, and R43. The combination
of R43 and R41 will determine the sensitivity of the
transceiver and hysteresis on the SD. Refer to the
application note entitled “Notes on Sensitivity and
hysteresis in Micrel’s Post Amplifiers” available at:
http://www.micrel.com/product-info/app_hints+notes.shtm
Table 1. Configuration Settings
R15 = R22 = 3.3
R45 = R46 = R24 = R32 = R19 = R36 = R48 = 0
R8 =10-50
C9 = C36 = 0.1µF
Top Pad
LD Anode
Top Pad
LD Cathode
Top Pad
DATA-
Board
Edge
Board
Edge
TOSA and ROSA Installation
Check the pin out of the VCSEL and receiver and
install them according to the diagrams shown on
Figure 1.
Bottom Pad
NC
Bottom Pad
PD Cathode
Bottom Pad
NC
Top Pad
LD Anode
Bottom Pad
PD Anode
Top Pad
DATA-
Bottom Pad
RSSI
Bottom Pad
RSSI
Top Pad GND
Top Pad GND
Top Pad
DATA+
Top Pad LD
Cathode
Top Pad
DATA+
Bottom Pad
VCC
(a) Common Cathode VCSEL
Bottom Pad
VCC
(b) Common Anode VCSEL
Figure 1. Mounting of Laser and Receiver
September 2004
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TXRX_307_R0 Evaluation Board
12. In OEM Configuration Register 0 window,
set ENABLE/DISABLE to DISABLE, VMOD
REFERENCE to VDD, and temperature zone
to INTERNAL.
Set-Up and Operation
Follow the step-by-step procedures, described below,
to set-up the board safely and properly:
1. Connect the on board DB-25 connector to the
parallel port of a computer.
13. In OEM Configuration Register 1 window:
a. Set APC OP-AMP TYPE to COMMON
EMITTER.
Note: Set the selection bit to 0, 0 should correspond
to EMITTER FOLLOWER, which should be displayed
on the bottom and COMMON EMITTER on the top.
2. Connect the differential input of the laser
driver to DATA output of the pattern generator.
3. Use a multimode fiber jumper with appropriate
connectors to connect optical output of the
VCSEL to a VOA (variable optical attenuator)
preset to 0dB attenuation.
b. Select the voltage to report in
VINH:VINL.
c. Set Feedback voltage source to 1.22V.
d. If a common cathode VCSEL is used,
set FEEDBACK BIAS REF and R E S
TERMINATION to V D D and V B I A S
DRIVE to SINK (PNP).
e. If a common anode VCSEL is used, set
FEEDBACK BIAS REF and R E S
TERMINATION to GND and V B I A S
DRIVE to SOURCE (NPN).
f. S e t
INTERNAL
FEEDBACK
RESISTOR to an arbitrary value (1.6K
for example).
14. In OEM Configuration Register 2, the
MIC3001 address and look-up table offset can
be modified. The look-up table covers 128°C.
The temperature range for offset = 0 is 0° to
+127°C.This range can be shifted down by 2x
offset. The offset is set to. If offset = 15, the
temperature range becomes –30° to +97°.
4. Connect the output of the VOA to the optical
input of the DCA, power-meter, or optical to
electrical converter.
5. Pre-adjust the power supply to 3.3V, turn it off,
and connect TP3 to VCC (3.3V) and TP5 to
GND. Then turn the power supply ON. The
total current drawn from the power supply
should be less than 300mA.
6. Launch the MIC3000/1 software. The
MIC3001 Optical Transceiver Management
IC panel opens with Panels and Help grayed
out and only Utilities can be run.
7. Refer to MIC3000/1 Software User’s Guide for
the detailed settings.
8. On the main window select Utilities to open
the utilities panel, then select SCAN to read
the address of the MIC3001 and GET to read
the manufacturer ID, Device ID, and Die
Revision. If there is a failure in reading one of
these parameters, you cannot proceed further.
If all the parameters are read correctly, close
the Utilities window to return to the main
window where the Panels and Help are no
longer grayed out.
15. In OEM Configuration Register 0 window,
set ENABLE/DISABLE to ENABLE.
16. On Panels list select OEM CONFIG 3-4 and
select EXTERNAL CALIBRATION (default
setting), LOS COMPARATOR ENABLE,
SHDN, RXLUT INPUT TEMPERATURE, and
RSOUT. If needed, later set ISTART to a
different value to speed up the APC loop startup during laser turn ON after a FAULT
occurrence. Close the window to return to
main window.
9. Select Panels to display the list of setting
panels.
10. All the bits displayed on the panels can be
read and/or modified on the panels or by
accessing the registers directly by selecting
ALL REGISTERS, enter the serial address,
the register address, select GET to read the
content or type a value and select SET NEW
to write. In this procedure the bits are set on
the panels.
17. On Panels list, select External Calibration.
Set all the offsets to 0 and slopes to 1. Set
RX_PWR(1) to 1. These parameters might
need to be changed later to correct the
measured values (calibration). Return to the
main window.
11. Select OEM CONFIG 0-2 to open the OEM
configuration registers 0, 1, and 2 windows.
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TXRX_307_R0 Evaluation Board
23. At this step, there is no received power since
no signal is applied at the input of the receiver.
18. On Panels list, select Temperature
Compensation. Load look-up tables for APC,
Modulation, Bias current Fault, and End-ofLife from appropriate files. If no loading is
done, the default value 0 is used for all the
LUT. Return to the main window.
24. Adjust the VOA to bring the optical power to
the desired level at the input of the receiver.
Then connect the output of the VOA to the
input of the receiver using appropriate fiber
jumper.
19. On Panels list, select OEM settings. Enter
the desired DAC values between 0 and 255
for the displayed parameters then select SET
NEW. Select GET CURRENT to make sure
that the set values are written into the
registers. Checking them can mask the faults.
Return to the main window.
25. If the installed receiver has RSSI signal, a
value (needs calibration) of the received
power should be displayed now.
26. On Panels list, select TX Setup to calibrate
the TX power. Measure the optical power at
the output of the VCSEL and enter the value
(in mW) in the MEASURED TX POWER box,
then select CALIBRATE. The monitored value
is adjusted to display the measured value by
automatically changing the slope set in the
EXTERNAL CALIBRATION window.
Reconnect the VOA to the VCSEL and return
to the main window.
20. On Panels list, select User. Check APC0 in
the USER CONTROL REGISTER (default
setting). All the other parameters can be
checked later to verify their functionality.
Return to the main window.
21. On Panels list, select Result. The values of
the five monitored parameters as per SFF8472 are now displayed. Type the alarm and
warning thresholds and select SET NEW
LIMITS. Select GET CURRENT LIMITS to
check that the set values are written into the
registers. Return to main window.
27. On Panels select RX Calibration. Measure
the input power to receiver at the output of the
VOA and enter the measured value (in mW) in
the MEASURED RX POWER box then select
CALIBRATE. The monitored value is adjusted
to display the measured value by
automatically changing the slope set in the
EXTERNAL CALIBRATION window.
Reconnect the VOA to the receiver and return
to the main window.
22. Set modulation current and bias current to get
the desired output power and extinction ratio
at the output of the VCSEL. Use OEM
Settings panel or TX Setup panel to
accomplish the following:
28. At this stage, the masked faults should be
unmasked and if there is a fault indication try
to find the cause of it and fix it to get the
transceiver running fault free and try to
measure the performance of the laser driver
and post amplifier.
a. In OEM settings window, set the bias
by entering a value from 10 to 100 in
APC SET POINT 0 box and
modulation by entering a value from
10 to 100 in MOD DAC setting box
followed by SET new.
b. In TX calibration window, set the bias
by entering a value from 10 to 100 in
APCO (DEC) box and modulation by
entering a value from 10 to 100 in
MOD DAC setting box followed by
SET new.
After setting the new value for bias or modulation
current, toggle TXDISABLE/TXENABLE on the main
window.
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TXRX_307_R0 Evaluation Board
Laser Response Tuning
Performance
Overshoot/Undershoot
The damping resistors R8 and R9 installed in series
with laser are 10. This value might be tuned to a
higher value to minimize or suppress any overshoot
or undershoot on the optical signal out of the laser,
but keep in mind that higher value damping resistors
will lead to higher rise/fall time.
Figure 2 shows an optical eye diagram obtained with
Honeywell HFE4190-541 VCSEL (common anode)
driven differentially:
2xFC (2.125Gbps), PRBS 223–1, ER = 10
Mask Set to 30%
Laser's Package Inductance Compensation
A compensation network comprised of C10/R35 or
C10/R14 can be used to compensate for the laser
package inductance. R35 and R14 share the same
pad on the board, so only one at a time can be
installed. The values shown on the schematic are
used for the symbol only. C10 should be a few pF and
R35/R14 around 50.
TIME (100ps/div.)
Figure 2. Optical Eye Diagram
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VCC_T
+5V
R25
10K
R11
10K
JP2
HEADER 4
R34
10K
R33
10K
R18
4.7K
R20
10K
VCC_T
VRX
from sheet 2
VCC_T
R21
10K
VCC_T
VCC_T
R6
10K
R24
0Ω
Q3
R5
10K
1
2
3
C28
1µF
13
12
C27
0.1µF
11
10
9
R23
10K
R16
TBD
C35
0.1µF
C13
0.1µF
19 20 21 22 23 24
C26
0.1µF
1
TXFAULT
XPN
VRX
SHDN
TXDISABLE
DATA
16 GNDD
17 NC
18 VDDD
C19
0.018µF
1
14
R17
47K
2
15
3
16
4
17
5
R3
270
Q5
C10
0.1µF
R35
270Ω
R22
TBD
R15
TBD
C11
0.1µF
C37
0.1µF
Q4
19
VCC_T
8
21
R2
270
9
22
10
23
R1
10K
11
24
12
25
13
J2
J3
C32
0.1µF
U3
SY89307
C33
0.1µF
1
VCTRL
2 D
3
/D
4 VBB
C38
0.1µF
R26
50R
R7
50R
R14
270Ω
VCC_T
R45
0Ω
7
20
R8
TBD
R9
TBD
VCC_T
R13
TBD
R27
TBD
VCSEL
4
R46
0Ω
R4
TBD
VCC_T
18
6
2
3
L1
R19
0Ω
R36
0Ω
J1
DB25
J7
VCSEL-CA
C9
0.1µF
VILD+ 6
VILD5
VDDA
4
GNDA
3
VMPD
2
FB
1
VMODVMOD
15
14
1
VDD
A0
2
DATA A1
3
CLK
A2
4
/ALERT P0
5
P7
P1
6
P6
P2
7
P5
P3
8
P4
GND
13 CLK
14 VIN
15 RSIN
L2
R32
0Ω
U2
MIC3000-1
12 11 10 9 8 7
VCC_T
RXLOS
RSOUT
COMP
VBIAS
U1
MIC74
16
VCC_T
VCC_T
C7
0.1µF
C12
0.1µF
4
VCC_T
R48
0Ω
50 Ohm TL
VCC_T
50 Ohm TL
RSOUT
RXLOS
RSIN
TXDISABLE
TXFAULT
SHDN
Micrel
C8
0.1µF
VCC 8
Q 7
/Q 6
VEE 5
C36
0.1µF
R12
127Ω
C39
0.1µF
R10
127Ω
Figure 2. Transmitter
VCC_T
TP1
L3
C31
10µF
+3.3V
TP3
L4
TP5
C29
10µF
VCC_R
C2
0.1µF VCC_R
C23
0.1µF
TP2
C1
0.1µF
U5
INA138
C3
0.1µF
C30
10µF
5
1
V+
OUT
2
GND
4 VIN–
3
VIN+
VRX
to sheet 1
R29
TBD
+5V
TP4
J6
ROSA1
VCC_R
C17
0.1µF
C16
0.1µF
C34
1µF
VCC_R
12
DOUT
11
GND
10
GND
9
/DOUT
C15
0.1µF
8 7
C20
0.1µF
C25
0.1µF
1
DIN
2
GND
3
GND
4
/DIN
VCC_T
VCC
LOS
CAP
VCC
J5
VCC_R
C6
0.1µF
13 14 15 16
/EN
VCC
U4
SY88973
VCC
LOSLVL
C14
0.1µF
J4
1
2
3
4
5
R41
TBD
C18
0.1µF
6 5
R43
TBD
VCC_T
VCC_R
C22
0.1µF
U6
74LCX04
C21 VCC_R
0.1µF
from Sheet 1
SHDN
TXFAULT
TXDISABLE
RXLOS
RSIN
RSOUT
C5
0.1µF
R40
5.11K
Q1
R47
0Ω
VCC_T
VCC_T
VCC_T
VCC_T
VCC_T
R42
270Ω
R44
270Ω
R37
270Ω
R38
270Ω
R31
270Ω
R39
270Ω
D1
D2
D3
D4
D5
D6
C4
0.1µF
VCC_R
VCC_R
C24
TBD
R28
TBD
VCC_R
7
1
3
5
9
GND
A0
A1
A2
A5
11
A4
13
A3
14
VCC
2
/O0
4
/O1
6
/O2
8
/O5
10
/O4
12
/O3
Q2
R30
270Ω
D7
Figure 3. Receiver
September 2004
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TXRX_307_R0 Evaluation Board
PCB Layout/Assembly
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TXRX_307_R0 Evaluation Board
Bill of Materials
Common Anode VCSEL Driven Differentially
Item
Part Number
Manufacturer
Description
Qty.
C19
Vishay
(1)
0.1µF, 0402, ceramic capacitor
1
C1-C18,C20-C22, C24-27,
C32, C33, C35-39,
Vishay(1)
0.1µF, 0402, ceramic capacitor
39
C28, C34
Vishay(1)
1µF, 0603, ceramic capacitor
2
10µF, Y, Tantalium Solid Electrolytic
Capacitor
3
LED
7
Receptacle DB-25 R/A connector, 25
Position
1
SMA End Launch Receptacle connector
4
Vishay
(1)
C29-C31
ECSH0GY106R
D1-7
67-1636-1-ND
J1
745783
J2-5
142-0711-821
Johnson
Components(4)
J6
D12M-9060-4
Luxnet(5)
ROSA
1
J8
4190-521
Honeywell(6)
VCSEL
1
L1-2
BLM18HG102SN
Murata(7)
Inductor
2
Digi-Key(2)
AMP(3)
Vishay
(1)
L3-4
IMC 0805 RK 122 J 01
1.2µH Ferrite bead inductor
2
Q1, Q5
MMBT3904
Fairchild
Semiconductor(8)
General purpose NPN transistor (SOT-23)
2
Q3-4
MMBT3906
Fairchild
Semiconductor(8)
General purpose PNP transistor (SOT-23)
2
R13, R16, R19, R27, R36,
R48
CRCW04020R00F
Vishay(1)
0 resistor
6
R15
CRCW04023R32F
Vishay(1)
3.32, 1% resistor
1
R8-9
CRCW040210R0F
Vishay
(1)
10, 1% resistor
2
R7, R26
CRCW040249R9F
Vishay(1)
49.9, 1% resistor
2
R10, R12
CRCW04021270F
Vishay(1)
50, 1% resistor
2
R2-3, R30-31, R37-39, R42,
R44
CRCW04022740F
Vishay
(1)
274, 5% resistor
8
R18
CRCW04024751F
Vishay(1)
4.75k, 5% resistor
R1, R5-6, R11, R20-21, R23,
R33-34, R41
CRCW04021002F
Vishay(1)
10k, 5% resistor
11
R17
CRCW04024752F
Vishay(1)
1
47k, 5% resistor
1
(9)
Color Coded PCB test point
1
Color Coded PCB test point
1
TP3
5010
Keystone
TP5
5011
Keystone(9)
(10)
U1
MIC74
Micrel
2-Wire serial I/O Expander
1
U2
MIC3001
Micrel(10)
Optical Transceiver Management IC
1
U3
SY89307
Micrel(10)
VCSEL Driver
1
U4
SY88973
Micrel(10)
3.2Gbps Limiting Post Amplifier
1
U5
INA138
High Side measurement Current Shunt
Monitor
1
U6
74LCX04
Low Voltage Hex Inverter with 5V Tolerant
Inputs
1
Bare PCB
1
TXRX_307_R0
September 2004
TI(Burr-Brown) (11)
Fairchild(8)
Micrel(10)
8
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TXRX_307_R0 Evaluation Board
Notes:
1.
Vishay: www.vishay.com
2.
Digi-Key: www.digikey.com
3.
AMP: www.amp.com
4.
Johnson Components: www.johnsoncomponents.com
5.
Luxnet: www.luxnetcorp.com
6.
Honeywell: www.honeywell.com/sensing/VCSEL
7.
Murata: www.murata.com
8.
Fairchild Semiconductor: www.fairchildsemi.com
9.
Keystone: www.keystone.com
10. Micrel, Inc.: www.micrel.com
11. TI: www. ti.com
September 2004
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TXRX_307_R0 Evaluation Board
Micrel Cross Reference
Application Hints and Notes
To find an equivalent Micrel part, go to Micrel’s
website at: http://www.micrel.com and follow the
steps below:
For application notes on high speed termination on
PECL and LVPECL products, clock synthesizer
products, SONET jitter measurement, and other High
Bandwidth product go to Micrel Semiconductors’
website at http://www.micrel.com/. Once in Micrel’s
website, follow the steps below:
1. Click on Dynamic Cross Reference.
2. Enter competitor’s part number in the Dynamic
Cross Reference field.
1. Click on “Product Info”.
2. In the Applications Information Box, choose
“Application Hints and Application Notes.”
3. To download a PDF version of this
information, click on the Cross Reference PDF
tab.
HBW Support
Hotline: 408-955-1690
Email Support: [email protected]
MICREL, INC. 1849 FORTUNE DRIVE SAN JOSE, CA 95131 USA
TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http:/www.micrel.com
The information furnished by Micrel in this data sheet is believed to be accurate and reliable. However, no responsibility is assumed by Micrel for
its use. Micrel reserves the right to change circuitry and specifications at any time without notification to the customer.
Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a
product can reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for
surgical implant into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant
injury to the user. A Purchaser’s use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser’s own risk
and Purchaser agrees to fully indemnify Micrel for any damages resulting from such use or sale.
© 2004 Micrel, Incorporated.
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