MGBC-20-8-1-SV Optical Fibre Channel ---- +3.3/+5V
Dual Voltage 850nm GBIC -- 2.125/1.25/1.0625GBaud
Features
2.125 Gbps Fibre Channel compliant
1.25 Gbps Gigabit Ethernet compliant
1.0625 Gbps Fibre Channel compliant
Compliant with Gigabit Interface Converter
(GBIC) specification
Hot Pluggable
150Ω differential AC coupled CML Level Outputs
+3.3V and +5V Power Supply (Dual Voltage)
Serial ID functionality (MOD_DEF 4)
Dual Power Supply (+3.3/+5V)
SERIAL IDENTIFICATION OPTION
S
= Serial ID
WAVELENGTH
1
= 850nm (multimode)
COMMUNICATION PROTOCOL
8
= 2x FC/GbE/1x FC;
2.125/1.25/1.0625GBaud
PR
PARAMETER
Storage Temperature
Supply Voltage
Data AC Voltage
Data DC Voltage
Optoelectronic Products
7444 West Wilson Avenue • Chicago, IL 60656
(708) 867-9600 • (800) 323-6858 • Fax: (708) 867-0996
email:optoinfo@stratoslightwave.com
http://www.stratoslightwave.com
MODULE SPECIFICATIONS - ABSOLUTE MAXIMUM RATINGS
SYMBOL
Tstg
V
CC
T, V
CC
R
Tx+, Tx-
Tx+, Tx-
MIN
-40
MAX
+85
6.0
2.6
10
UNITS
°C
V
Vpp
Vpk
NOTES
VCC - ground
Differential
V (Tx+ or Tx-) - ground
EL
SYMBOL
Tc
VDDT, VDDR
BRate
MODULE SPECIFICATION - RECOMMENDED OPERATING CONDITIONS
PARAMETER
Operating Case Temperature
Supply Voltage
Baud Rate
MIN
0
+3.15
1.0625
TYP
MAX
+80
+5.25
2.125
UNITS
°C
VDC
GBaud
NOTES
3167.01
IM
-10
IN
1 of 13
ORDERING INFORMATION
MGBC-20 - 8 - 1 - S V
PRODUCT OVERVIEW
The MGBC-20-8-1-SV GBIC transceiver module is a high
performance integrated duplex data link for bi-directional
communication over multimode optical fiber. It is compli-
ant with the Gigabit Interface Converter (GBIC) specifica-
tion. The MGBC-20-8-1-SV is specifically designed for
high speed Fibre Channel data links up to 2.125 Gbps.
The Stratos Lightwave GBIC transceiver is hot pluggable
which allows a suitably designed enclosure to be
changed from one type of external interface to another
simply by plugging in a GBIC having the alternative
external interface.
This optoelectronic transceiver module is a Class 1 Laser
product compliant with FDA Radiation Performance
Standards, 21 CFR Subchapter J. This component is
also a Class 1 Laser compliant according to the Interna-
tional Safety Standard IEC-825-1.
SHORT WAVELENGTH LASER
The use of short wavelength VCSELs (Vertical Cavity
Surface Emitting Laser) and high volume production
processes has resulted in a low cost, high performance
data link which communicates reliably at distance of
300m over 50µm multimode fiber with data transfer rate
up to 2.125GBaud.
AR
Y
PRELIMINARY
MGBC-20-8-1-SV Optical Fibre Channel ---- +3.3/+5V
Dual Voltage 850nm GBIC -- 2.125/1.25/1.0625GBaud
PERFORMANCE SPECIFICATIONS - ELECTRICAL
0ºC<Tc<+70°C; +3.15V<Vcc<+5.25V
PARAMETER
Supply Current
Surge Current
TRANSMITTER
CML/PECL Input (Differential)
Input Impedance (Differential)
Tx_DISABLE Input Voltage - High
Tx_DISABLE Input Voltage - Low
Tx_FAULT Output Voltage -- High
Tx_FAULT Output Voltage -- Low
RECEIVER
CML Output (Differential)
Source Termination
Characteristic Impedance
Rx_LOS Output Voltage - High
Rx_LOS Output Voltage - Low
Total Jitter [ Pk - Pk ]
MOD_DEF ( 0:2 )
SYMBOL
lcc
Isurge
MIN
TYP
120
180
MAX
150
250
300
+30
UNITS NOTES
Tc =+25°C, Vcc = +3.3 V
mA Tc =+25°C, Vcc = +5.0 V
0°C <Tc<+70°C, +3.15V< Vcc <+5.25V
mA Surge above steady state value
Zin
ViH
ViL
VtoH
VtoL
400
135
2
0
Vcc-0.5
0
400
140
135
Vcc-0.5
0
2000 mVpp AC coupled inputs
150
165
ohms Rin > 100 kohms @ DC
V
DD
T+0.3
V
0.8
V
Vcc+0.3
V Io = 400µA; Host Vcc
0.5
V Io = -4.0mA
800
150
150
TJ
VoH
VoL
2.5
0
MGBC-20-8-1-SV OPTICAL SPECIFICATIONS - 850nm Multimode
PARAMETER
50µm Core Diameter MMF
62.5µm Core Diameter MMF
TRANSMITTER
Optical Center Wavelength
Spectral Width
Optical Transmit Power
Extinction Ratio
Optical Modulation Amplitude
Relative Intensity Noise
Total Jitter
SYMBOL
MIN
300
550
200
300
830
TYP
500
1000
300
500
850
MAX
IM
-9.5
9
180
860
0.85
-2¹
-117
85
170
150
260
770
-17
31
12
-29
1.5
860
0
-17
5.0
IN
75
130
0.5
ps
V
V
nm
nm
dBm
dB
µW
dB/Hz
ps
ps
nm
dBm
µW
dB
dBm
dBm
dB
Zs
Z
φ
VroH
VroL
1200 mVpp AC coupled outputs
160
ohms Differential CML Output
165
ohms Differential microstrip impedance
Vcc+0.3
V lo = 400µA; Host Vcc
0.5
V lo = -4.0mA
EL
λ
∆λ
Popt
ER
OMA
RIN
TJ
t
R
, t
F
λ
Pr
OMA
ORL
Pa
Pd
Pa-Pd
UNITS NOTES
BER<1.0E-12 @ 2.125GBaud
BER<1.0E-12 @ 1.25/1.0625GBaud
m
BER<1.0E-12 @ 2.125GBaud
BER<1.0E-12 @ 1.25/1.0625GBaud
PR
Output Rise/Fall Time
RECEIVER
Optical Input Wavelength
Optical Input Power
Optical Modulation Amplitude
Optical Return Loss
RX_LOS - Asserted
RX_LOS - Deasserted
RX_LOS - Hysteresis
Note
1
: Lessor of class 1 laser safety limits (CDRH and EN 60825) or receiver power, max
3059.02
AR
Y
Measured with 2
7
- 1 PRBS @ 2.125GBaud
Measured with 2
7
- 1 PRBS @ 1.25/1.0625GBaud
With Serial ID
0ºC<Tc<+70°C; +3.15V<Vcc<+5.25V
RMS
Average @ 850nm
P1/P0
pk-pk
Measured with 2
7
- 1 PRBS @ 2.125GBaud
Measured with 2
7
- 1 PRBS @ 1.25/1.0625GBaud
20-80%; measured unfiltered @ 2.125GBaud
20-80%; measured unfiltered @ 1.25/1.0625GBaud
BER<1.0E-12 @ 2.125/1.25/1.0625GBaud
pk-pk
Measured on transition - Low to High
Measured on transition - High to Low
2 of 13
MGBC-20-8-1-SV Optical Fibre Channel ---- +3.3/+5V
Dual Voltage 850nm GBIC -- 2.125/1.25/1.0625GBaud
Close positioning of SERDES with respect to transceiver; allows for shorter line lengths and at
gigabit speeds reduces EMI.
Minimum number of external components.
Internal termination reduces the potential for unterminated stubs which would otherwise increase
jitter and reduce transmission margin.
Subsequently, this affords the customer the ability to optimally locate the SERDES as close to the MGBC-20 as
possible and save valuable real estate. At gigabit rates this can provide a significant advantage resulting in better
transmission performance and accordingly better signal integrity.
IN
3 of 13
Figure 1 illustrates the recommended transmit and receive data line terminations.
CML/PECL TRANSMIT DATA
CML
EL
IM
CML
PR
FIGURE 1: Example of termination circuits for Drivers and Receivers in the host and the GBIC
3167.01
AR
Y
CML/PECL TRANSMIT DATA
TERMINATION CIRCUITS
Inputs to the MGBC-20-8-1-SV transmitter are AC coupled and internally terminated through 75 ohms to AC ground.
These modules can operate with CML/PECL logic level. The input signal must have at least a 400mV peak-to-peak
(differential) signal swing. Output from the receiver section of the module is AC coupled CML level and is expected to
drive into a 75 ohm load. Different termination strategies may be required depending on the particular Serializer/
Deserializer chip set used.
The MGBC-20 product family is designed with AC coupled data inputs and outputs
to provide the following advantages:
PRELIMINARY
MGBC-20-8-1-SV Optical Fibre Channel ---- +3.3/+5V
Dual Voltage 850nm GBIC -- 2.125/1.25/1.0625GBaud
POWER COUPLING
A suggested layout for power and ground connections is given in figure 2A below. Connections are made via separate voltage
and ground planes. The mounting posts are at case ground and should not be connected to circuit ground. The ferrite bead
should provide a real impedance of 220ohms at 100MHz. Bypass capacitors should be placed as close to the 20 pin connector
as possible.
16
15
C1
Values:
C2
L2
L1
+
Vcc
C4
C3
Figure 2A. Suggested Power Coupling
-Electrical Schematic
ELECTRICAL INTERFACE, PIN DESCRIPTIONS
PIN 1
PIN 2
PIN 3
PIN 4
PIN 5
PIN 6
PIN 7
PIN 8
PIN 9
RX_LOS
RGND
RGND
MOD_DEF (0)
MOD_DEF (1)
MOD_DEF (2)
TX_DISABLE
TGND
TGND
PIN 10
TX_FAULT
RGND
-RX_DAT
+RX_DAT
RGND
VDDR
VDDT
TGND
+TX_DAT
-TX_DAT
TGND
PIN 11
PIN 12
PIN 13
PIN 14
PIN 15
PIN 16
PIN 17
PIN 18
PIN 19
PIN 20
The RX_LOS signal is intended as a preliminary indication to the system in which the GBIC is
installed that the link signals are likely to be outside the required values for proper operation.
The host shall provide a 4.7K to 10K ohm pull-up resistor to VDDR
Receiver Ground
Receiver Ground
GBIC module definition and presence, bit 0, 4.7K to 10K Ohm pull-up resistor to VDDT on host.
GBIC module definition and presence, bit 1 4.7K to 10K Ohm pull-up resistor to VDDT on host.
GBIC module definition and presence, bit 2, 4.7K to 10K Ohm pull-up resistor to VDDT on host.
Active high logic input which disables the optical output . This signal is driven by the host. This
pin is internally pulled up to VDDT through a resistor.
Transmitter Ground
Transmitter Ground
Active high signal. A TX_FAULT is defined as the failure of the optical output of the GBIC and it is
internally latched. The host shall provide a 4.7K to 10K ohm pull-up resistor to VDDT
Receiver Ground
Receiver Data inverted differential output.
Receiver Data Non-inverted differential output.
Receiver Ground
+3.3/+5V Power supply for Receiver section.
+3.3/+5V Power supply for Transmitter section.
Transmitter Ground
Transmitter Data Non-inverted differential input.
Transmitter Data inverted differential input.
Transmitter Ground
PR
3059.02
EL
IM
IN
C1, C2 = 1000pF, COG
C3
= 0.1µF
C4
= 10µF, Tantilum
L1, L2 = Real Impedance of 220Ω @ 100MHz
AR
Y
BOTTOM VIEW
Figure 2B. Suggested Power Coupling
-Component Placement
4 of 13
MGBC-20-8-1-SV Optical Fibre Channel ---- +3.3/+5V
Dual Voltage 850nm GBIC -- 2.125/1.25/1.0625GBaud
SIGNAL DESCRIPTION:
TX_FAULT:
Active high signal. A TX_FAULT is defined as the failure of the optical output of the GBIC and it is internally latched.
On the rising edge of the TX_DISABLE, the latched laser fault will be cleared and TX_FAULT will remain deasserted while
TX_DISABLE is asserted. The host shall provide a 4.7K to 10K Ohm pull up resistor to Vcc. The TX_FAULT will also be as-
serted but not latched if the Vcc falls below the lower Vcc limit.
RX_LOS
:
The RX_LOS signal is intended as a preliminary indication to the system in which the GBIC is installed that the link
signals are likely to be outside the required values for proper operation. Such indications typically point to non-installed cables,
broken cables, or a disabled, failing or powered off transmitter at the far end of the cable. Additional indications are provided by
the system in which the GBIC is installed to verify that the information being transmitted is valid, correctly encoded and in the
correct format. Such additional indications are outside the scope of the GBIC specification. RX_LOS will also be asserted if the
Vcc falls below the lower Vcc limit. The host shall provide a 4.7k to 10k Ohm pullup resistor to Vcc.
RGND
Receiver ground. It is internally connected to TGND plane.
TGND
Transmitter ground. It is internally connected to RGND plane.
±RX_DAT
High speed serial differential CML receiver data.
±TX_DAT
High speed serial differential CML/PECL transmit data.
V
DD
T
Transmitter +3.3/+5V power supply
V
DD
R
Receiver +3.3/+5V power supply
GBIC TIMING PARAMETERS
The Timing parameters For GBIC management are shown in table 2.
PARAMETER
TX_DISABLE
assert time
TX_DISABLE
negate time
Time to initialize
includes reset of
TX_FAULT
TX_FAULT from
fault to assertion
TX_DISABLE time
to start reset
RX_LOS assert
delay
RX_LOS negate
delay
EL
SYMBOL
t_off
MIN.
t_on
t_init
t_fault
10
t_reset
t_loss_on
t_loss_off
IM
MAX.
10
1
300
100
100
100
PR
3167.01
Table 1: Timing parameters for GBIC management
IN
UNIT
µsec
msec
msec
µsec
µsec
µsec
µsec
CONDITIONS
Rising edge of TX_DISABLE to fall of output signal
below 10% of nominal
Falling edge of TX_DISABLE ro rise of output
signal above 90% of nominal
From power on or hot plug after VDDT > 4.75 volts
or from negation of TX_DISABLE during reset of
TX_FAULT
From occurrence of fault (output safety violation or
VDDT < 4.5 volts)
TX_DISABLE HIGH before TX_DISABLE set LOW
From detection of loss of signal to assertion of
RX_LOS
From detection of presence of signal to negation
of RX_LOS
5 of 13
PRELIMINARY
AR
Y
TX_DISABLE
:
Active high logic input which disables the optical output. This signal is driven by the host. While asserted, the
GBIC module disables all laser light output. This pin is internally pulled up to Vcc through a 10K Ohm resistor for short wave-
length and a 4.7K Ohm resistor for long wavelength. The TX_DISABLE must be pulled low or connected to circuit ground by the
host to enable the GBIC output.
FPGA/CPLD
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