Epic 1.25Gbps SFP Transceiver
2 Nov, 2011
Epic 1.25Gbps SFP Transceiver
Description
The Epic 1000BASE-SX multi-mode transceiver is a
small form factor pluggable module for bi-directional serial optical data communications such as Gigabit Ethernet
1000BASE-SX and Fiber Channel FC-PH-2 for 100-M5-SN-1 and 100-M6-SN-1.
This transceiver has an SFP 20-pin connector to allow hot plug capability. This
module is designed for multi-mode fiber and operates at a nominal wavelength of
850 nm.
The transmitter section uses a Vertical Cavity Surface Emitted Laser
(VCSEL) and is Class 1 Laser compliant according to International Safety
Standard IEC-60825. The receiver section uses an integrated InGaAs detector
preamplifier (IDP) mounted in an optical header and a limiting post-amplifier IC.
The Epic 1000BASE-SX is designed to be compliant with SFF-8472 SFP
Multi-source Agreement (MSA).
ALL OF OUR TRANSCEIVERS ARE TIER 1 LASERS, MANUFACTURED
TO OEM SPECIFICATIONS, ROHS (LEAD FREE), TAA COMPLIANT AND
COMPLIANT WITH THE SFP MSA (MULTISOURCE AGREEMENT)AND
COME WITH A LIFETIME WARRANTY.
Features
• Operating data rate up to 1.25Gbps.
• 850 nm FP LD Transmitter.
• 550m with 50/125 µm MMF, 300m
on 62.5/125 µm MMF.
• Single 3. 3V Power supply and TTL
Logic Interface.
• Compliant with MSA SFP Specification.
• Digital diagnostic monitor interface
Compatible with SFF-8472
Applications
• Gigabit Ethernet Switches and
Routers.
• Duplex LC Connector Interface.
• Fiber Channel.
• Hot Pluggable.
• Switch to switch interface.
• Operating Case Temperature
Standard: 0 ~+70°C.
Industrial: -40°C~+85°C
• High speed I/O for file servers.
751 Maleta Lane Ste 204, Castle Rock, CO 80108
PHONE# 720-904-5200 • FAX# 720-904-5222
P. 1 of 7
Feature
Standard
Performance
Electrostatic Discharge
(ESD) to the Electrical Pins
MIL-STD-883E
Method 3015.7
Class 1(>500 V)
Isolation with the case
Electromagnetic
Interference (EMI)
FCC Part 15 Class B
Compatible with standards
Laser Eye Safety
FDA 21CFR 1040.10 and 1040.11
EN60950, EN (IEC) 60825-1,2
Compatible with Class I
laser product.
Compatible with T üV standards
Component Recognition
UL and CUL
UL file E317337
Green Products
RoHS
RoHS6
Absolute Maximum Ratings
Parameter
Symbol
Min. Max.
Unit
Storage Temperature
TS
-40
+85
°C
Supply Voltage VCC
-0.5
3.6
V
Recommended Operating Conditions
Parameter
Operating Case
Temperature
Symbol
Ta
Unit
0
-40
+70
+85
°C
3.15
3.45
V
ICC
300
mA
ISurge
+30
mA
VCC
Power Supply Current
Max.
1000BASE-SX
1000BASE-SX-I
Power Supply Voltage Min. Surge Current
Typical
3.3
Baud Rate
1.25
GBaud
Performance Specifications - Electrical
Parameter
Symbol
Min. Typical
Max.
Unit
Notes
mVp
AC coupled inputs
TRANSMITTER
VLPECL Inputs(Differential) Vin 400 2500 Input Impedance Zin 85 100 115 ohms (Differential) Rin > 100
kohms @ DC
Tx_DISABLE Input Voltage - High
2 3.45 V
Tx_DISABLE Input Voltage - Low
0 0.8 V
Tx_FAULT Output Voltage - High
2 Vcc+0.3 V
lo=400μA; Host Vcc
Tx_FAULT Output Voltage - Low
0 0.5 V
lo= -4.0mA
P. 2 of 7
Performance Specifications - Electrical
Parameter
Symbol
Min. Typical
Max.
Unit
Notes
AC coupled outputs
RECEIVER
LVPECL Outputs
(Differential)
Vout
400
800
1200
mVpp
Output Impedance
(Differential)
Zout
85
100
115
ohms
Rx_LOS Output
Voltage - High
2
Vcc+0.3
V
lo=400µA; Host Vcc
Rx_LOS Output
Voltage - Low
0
0.8
V
lo= -4.0mA
MOD_DEF (0:2)
VoH
VoL
2.5
0
V
0.5
With Serial ID
V
Optical and Electrical Characteristics
Parameter
50µm Core Dia. MMF
Symbol
Min. Typical
L
Data Rate
Max.
Unit
550
m
1.25
Gbps
TRANSMITTER
Centre Wavelength
Spectral Width (RMS) Average Output Power 1000BASE-SX Extinction Ratio Rise/Fall Time(20% ~80%) λσ
820 850 σ Pout -9 EX tr/tf Data Input Swing Differential Vin 500 Input differential Impedance Zin 90 nm
-4 dBm
260 ps
2000 mV
100 110 Ω
Disable 2.0 Vcc+0.3 Enable Fault Normal
0 2.0 0
0.8
Vcc+0.3 0.8
TX_Disable Assert Time dB
ITU-T G.957 Compliant
nm
0.85 9 Output Optical Eye TX Disable
TX_Fault
860 t_off V
V
10 us
RECEIVER
Centre Wavelength
Receiver
1000BASE-SX
λc
760
860
nm
PIN
-
-17
dBm
Output Differential Impedance
PIN
90
Data Input Swing Differential
Vout
370
Rise/Fall Time
LOS
100
110
Ω
2000
mV
Tr/tf
2.2
ns
LOS De-Assert
LOSD
-20
dBm
LOS De-Assert
LOSA
-40
High
2.0
Vcc+0.3
Low
0
0.8
P. 3 of 7
dBm
V
SFP Transceiver Electrial Pad Layout
Disable
Towards Bezel
Towards ASIC
Rate Select
Pin Function Definitions
Pin
Name
Function
Number
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15 16 17 18 19 20 Vee T
TX Fault
TX Disable MOD-DEF2 MOD-DEF1 MOD-DEF0 Rate Select LOS VeeR VeeR VeeR RD-
RD+ VeeR VccR VccT VeeT TD+ TD- VeeT Transmitter Ground
Trasmitter Fault Indication
Transmitter Disable Module Definition 2 Module Definition 1 Module Definition 0 Not Connect Loss of Signal Receiver Ground Receiver Ground Receiver Ground Inv. Received Data Out
Received Data Out Receiver Ground Receiver Power Transmitter Power Transmitter Ground Transmit Data In Inv. Transmit Data In Transmitter Ground P. 4 of 7
Plug
Seq.
1
3
3
3
3
3
3
3
1
1
1
3
3
1
2
2
1
3
3
1
Notes
Note 1
Note 2, Module disables on high or open
Note 3, Data line for Serial ID.
Note 3, Clock line for Serial ID.
Note 3, Grounded within the module.
Function not available
Note 4
Note 5
Note 5
Note 5
Note 6
Note 7
Note 5
3.3 ± 5%, Note 7
3.3 ± 5%, Note 7
Note 5
Note 8
Note 8
Note 5
Notes:
1) TX Fault is an open collector/drain output, which should be pulled up with a 4.7K –
10K Ω resistor on the host board. Pull up voltage between 2.0V and VccT, R+0.3V.
When high, output indicates a laser fault of some kind. Low indicates normal operation. In the low state, the output will be pulled to < 0.8V.
2) TX disable is an input that is used to shut down the transmitter optical output. It is
pulled up within the module with a 4.7 – 10 K Ω resistor. Its states are:
Low (0 – 0.8V): Transmitter on
(>0.8, < 2.0V): Undefined
High (2.0 – 3.465V): Transmitter Disabled
Open: Transmitter Disabled
3) Mod-Def 0,1,2. These are the module definition pins. They should be pulled up with
a 4.7K – 10K resistor on the host board. The pull-up voltage shall be VccT or VccR
(see Section IV for further details). Mod-Def 0 is grounded by the module to indicate
that the module is present Mod-Def 1 is the clock line of two wire serial interface for
serial ID Mod-Def 2 is the data line of two wire serial interface for serial ID
4) LOS (Loss of Signal) is an open collector/drain output, which should be pulled up
with a 4.7K – 10K Ω resistor. Pull up voltage between 2.0V and VccT, R+0.3V. When
high, this output indicates the received optical power is below the worst-case receiver sensitivity (as defined by the standard in use). Low indicates normal operation. In
the low state, the output will be pulled to < 0.8V.
5) VeeR and VeeT may be internally connected within the SFP module.
6) RD-/+: These are the differential receiver outputs. They are AC coupled 100 Ω differential lines which should be terminated with 100 (differential) at the user SERDES.
The AC coupling is done inside the module and is thus not required on the host
board. The voltage swing on these lines will be between 370 and 2000 mV differential (185 –1000 mV single ended) when properly terminated.
7) VccR and VccT are the receiver and transmitter power supplies. They are defined
as 3.3V ±5% at the SFP connector pin. Maximum supply current is 300mA. Recommended host board power supply filtering is shown below. Inductors with DC resistance of less than 1 ohm should be used in order to maintain the required voltage at
the SFP input pin with 3.3V supply voltage. When the recommended supply-filtering
network is used, hot plugging of the SFP transceiver module will result in an inrush
current of no more than 30mA greater than the steady state value. VccR and VccT
may be internally connected within the SFP transceiver module.
8) TD-/+: These are the differential transmitter inputs. They are AC-coupled, differential
lines with 100 differential termination inside the module. The AC coupling is done
inside the module and is thus not required on the host board. The inputs will accept
differential swings of 500 – 2400 mV (250 – 1200mV single-ended), though it is recommended that values between 500 and 1200 mV differential (250 – 600mV singleended) be used for best EMI performance.
P. 5 of 7
EEPROM
The serial interface uses the 2-wire serial CMOS EEPROM protocol defined for the
ATMEL AT24C02/04 family of components. When the serial protocol is activated, the
host generates the serial clock signal (SCL). The positive edge clocks data into those
segments of the EEPROM that are not write protected within the SFP transceiver. The
negative edge clocks data from the SFP transceiver. The serial data signal (SDA) is
bi-directional for serial data transfer. The host uses SDA in conjunction with SCL to
mark the start and end of serial protocol activation. The memories are organized as a
series of 8-bit data words that can be addressed individually or sequentially. The Module provides diagnostic information about the present operating conditions. The transceiver generates this diagnostic data by digitization of internal analog signals. Calibration and alarm/warning threshold data is written during device manufacture. Received
power monitoring, transmitted power monitoring, bias current monitoring, supply voltage monitoring and temperature monitoring all are implemented. The diagnostic data
are raw A/D values and must be converted to real world units using calibration constants stored in EEPROM locations 56 – 95 at wire serial bus address A2h. The digital
diagnostic memory map specific data field define as following .For detail EEPROM
information, please refer to the related document of SFF 8472 Rev 9.3
2 wire address 1010000X (A0h)
2 wire address 1010001X (A2h)
0
0
Serial ID Defined by
SFP MSA (96 bytes)
55
95
95
Vendor Specific
(32 bytes)
119
127
127
Reserved
(128 bytes)
247
255
255
Alarm and Warning
Thresholds (56 bytes)
Cal Constants
(40 bytes)
Real Time Diagnostic
Interface (24 bytes)
Vendor Specific (8 bytes)
User Writable
EEPROM (120 bytes)
Vendor Specific (8 bytes)
Ordering Information
Pin
Data Rate
Laser
Number
1000BASE-SX
1.25Gbps
850nm VCSEL
P. 6 of 7
Fibre
Distance
Type
MMF
550km
Optical
Interface
LC
Recommend Circuit Schematic
Mechanical Specifications
Epic Broadband Solutions
751 Maleta Lane Ste 204, Castle Rock, CO 80108
PHONE# 720-904-5200 • FAX# 720-904-5222
www.epicbbs.com
P. 7 of 7
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