GLC-SX-MM-RGD-EO
GLC-SX-MM-RGD-EO
SFP, Duplex LC Connector, 850nm Multimode, RoHS Compliant
GLC-SX-MM-RGD-EO
1.25Gbps SFP Transceiver
Features

Operating data rate up to 1.25Gbps

850nm VCSEL Laser Transmitter

550m with 50/125 µm MMF, 300m on
62.5/125 µm MMF

Single 3. 3V Power supply and TTL Logic
Interface

Duplex LC Connector Interface

Hot Pluggable

Operating Case Temperature
Applications

Gigabit Ethernet

Fiber channel
Industrial:-40°C ~+85°C

Switch to switch interface

Compliant with MSA SFP Specification

High speed I/O for file servers

Digital diagnostic monitor interface
Standard: 0°C ~+70°C
Compatible with SFF-8472
Product Description
The GLC-SX-MM-RGD-EO multi-mode transceiver is small form factor pluggable module
for bi-directional serial optical data communications such as Gigabit Ethernet 1000BASESX and Fiber Channel FC-PH-2 for 100-M5-SN-1 and 100-M6-SN-1. It is with the 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 a
Class 1 laser compliant according to International Safety Standard IEC 60825. The
receiver section uses an integrated GaAs detector preamplifier (IDP) mounted in an
optical header and a limiting post-amplifier IC.
The GLC-SX-MM-RGD-EO is designed to be compliant with SFF-8472 SFP Multi-source
Agreement (MSA).
Page 1 of 9
GLC-SX-MM-RGD-EO
SFP, Duplex LC Connector, 850nm Multimode, RoHS Compliant
Regulatory Compliance
Feature
Standard
Performance
Electrostatic Discharge (ESD)
to the Electrical Pins
Electromagnetic Interference
(EMI)
MIL-STD-883E Method
3015.7
Class 1(>500 V) Isolation
with the case
Compatible with
standards
Compatible with Class I
laser product. Compatible
with TμV standards
FCC Part 15 Class B
FDA 21CFR 1040.10 and
1040.11 EN60950, EN
(IEC) 60825-1,2
Laser Eye Safety
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
Symbol
Operating Case Temperature
TA
Min.
SFP-SXx
Typical
0
+70
°C
3.45
V
VCC
Power Supply Current
ICC
300
mA
ISurge
+30
mA
Baud Rate
3.3
Unit
Power Supply Voltage
Surge Current
3.15
Max.
1.25
GBaud
PERFORMANCE SPECIFICATIONS - ELECTRICAL
Parameter
Symbol
Min.
Typ.
Max
Unit
2500
mVp
115
ohms
2
3.45
V
0
0.8
V
Notes
TRANSMITTER
LVPECL
Inputs(Differential)
Input Impedance
(Differential)
Tx_DISABLE Input
Voltage - High
Tx_DISABLE Input
Voltage - Low
Vin
400
Zin
85
100
AC coupled
inputs
Rin > 100
kohms @ DC
Page 2 of 9
GLC-SX-MM-RGD-EO
SFP, Duplex LC Connector, 850nm Multimode, RoHS Compliant
Tx_FAULT Output
Voltage -- High
Tx_FAULT Output
Voltage -- Low
2
Vcc+0.3
V
Io = 400µA;
Host Vcc
0
0.5
V
Io = -4.0mA
AC coupled
outputs
RECEIVER
LVPECL Outputs
(Differential)
Output Impedance
(Differential)
Rx_LOS Output
Voltage - High
Rx_LOS Output
Voltage - Low
Vout
400
800
1200
mVpp
Zout
85
100
115
ohms
2
Vcc+0.3
V
lo = 400µA;
Host Vcc
0
0.8
V
lo = -4.0mA
MOD_DEF ( 0:2 )
VoH
2.5
VoL
0
V
0.5
V
With Serial ID
Optical and Electrical Characteristics
Parameter
Symbol
50µm Core Diameter MMF
Min.
L
Data Rate
Typical
Max.
Unit
550
m
1.25
Gbps
Transmitter
Centre Wavelength
λC
Spectral Width (RMS)
σ
Average Output Power
P0ut
-9
Extinction Ratio
EX
9
Rise/Fall Time(20%~~80%)
tr/tf
Output Optical Eye
820
500
Input Differential Impedance
ZIN
90
TX_Disable Assert Time
nm
0.85
nm
-4
dBm
dB
ps
IUT-T G.957 Compliant
VIN
TX_Fault
860
260
Data Input Swing Differential
TX Disable
850
100
2000
mV
110
Ω
Disable
2.0
VCC+0.3
Enable
0
0.8
Fault
2.0
VCC+0.3
Normal
0
0.8
t_off
10
V
V
us
Receiver
Page 3 of 9
GLC-SX-MM-RGD-EO
SFP, Duplex LC Connector, 850nm Multimode, RoHS Compliant
Centre Wavelength
λC
Receiver Sensitivity
PIN
Output Differential Impedance
PIN
90
Data Output Swing Differential
VOUT
370
Rise/Fall Time
860
nm
-17
dBm
110
Ω
2000
mV
Tr/tf
2.2
ns
LOS De-Assert
LOSD
-20
dBm
LOS Assert
LOSA
LOS
760
100
-40
dBm
High
2.0
VCC+0.3
Low
0
0.8
V
SFP Transceiver Electrical Pad Layout
Veet
4
5
6
7
8
9
10
Page 4 of 9
GLC-SX-MM-RGD-EO
SFP, Duplex LC Connector, 850nm Multimode, RoHS Compliant
Pin Function Definitions
Pin
Num.
Name
FUNCTION
Plug
Seq.
1
VeeT
Transmitter Ground
1
2
TX Fault
Transmitter Fault Indication
3
Note 1
3
TX Disable
Transmitter Disable
3
Note 2, Module disables on high
or open
4
MOD-DEF2
Module Definition 2
3
Note 3, Data line for Serial ID.
5
MOD-DEF1
Module Definition 1
3
Note 3, Clock line for Serial ID.
6
MOD-DEF0
Module Definition 0
3
Note 3, Grounded within the module.
7
Rate Select
Not Connect
3
Function not available
8
LOS
Loss of Signal
3
Note 4
9
VeeR
Receiver Ground
1
Note 5
10
VeeR
Receiver Ground
1
Note 5
11
VeeR
Receiver Ground
1
Note 5
12
RD-
Inv. Received DataOut
3
Note 6
13
RD+
Received Data Out
3
Note 7
14
VeeR
Receiver Ground
1
Note 5
15
VccR
Receiver Power
2
3.3 ± 5%, Note 7
16
VccT
Transmitter Power
2
3.3 ± 5%, Note 7
17
VeeT
Transmitter Ground
1
Note 5
18
TD+
Transmit Data In
3
Note 8
19
TD-
Inv. Transmit Data In
3
Note 8
20
VeeT
Transmitter Ground
1
Note 5
Notes
1) TX Fault is an open collector/drain output, which should be pulled up with a 4.7K –10KΩ
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 KΩ resistor. Its states are:
Low (0 – 0.8V): Transmitter on
(>0.8, < 2.0V): Undefined
Page 5 of 9
GLC-SX-MM-RGD-EO
SFP, Duplex LC Connector, 850nm Multimode, RoHS Compliant
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 – 10KΩ 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 ModDef 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 100Ω
differential lines which should be terminated with 100 Ω (differential) at the user SERDES.
The accoupling 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 Ω 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 single-ended) be used for
Page 6 of 9
GLC-SX-MM-RGD-EO
SFP, Duplex LC Connector, 850nm Multimode, RoHS Compliant
best EMI performance.
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 bidirectional 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.
Page 7 of 9
GLC-SX-MM-RGD-EO
SFP, Duplex LC Connector, 850nm Multimode, RoHS Compliant
Recommend Circuit Schematic
RES1
TD+
RD+
Photodiode
RES 1=4.7k to 10k
Mechanical Specifications
Page 8 of 9
GLC-SX-MM-RGD-EO
SFP, Duplex LC Connector, 850nm Multimode, RoHS Compliant
Ordering information
Part No.
Data Rate
Laser
Fiber Type
Distance
GLC-SX-MM-RGD-EO
1.25Gbps
850nm VCSEL
MMF
550m
Optical
Interface
LC
DDMI
NO
* D--- DDMI
X
Interface
GBIC
SFP
X
X
X
X
X
X
Rate:
C:10/100/1000
X:Single Rate
Mode:
T:UTP
S:Muti-mode
L:Single mode 1310nm
Z:Single mode 1550nm
X
X
X
Digital Monitor
D:with DDM
Blank:without DDM
Distance:
Blank:550m
10:10Km
20:20Km
40:40Km
80:80Km
120:120Km
Page 9 of 9
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