REV:1.0
XGGB-8512-02
1.25G 850nm Multi-mode GBIC Transceiver
PRODUCT FEATURES

Up to 1.25Gb/s data links

VCSEL laser transmitter and PIN photo-detector

Up to 550m on 50/125µm MMF

GBIC footprint

Duplex SC/UPC type pluggable optical interface

Low power dissipation

Metal enclosure, for lower EMI

RoHS compliant and lead-free

Single +5V power supply

Compliant with SFF-8472

Case operation Temperature: 0°C to +70°C
APPLICATIONS

Switch to Switch Interface

Gigabit Ethernet

Switched Backplane Applications

Router/Server Interface

Other Optical Links
Page 1
REV:1.0
PRODUCT DESCRIPTION
XGIGA’s XGGB-8512-02 Small Form Factor Pluggable (SFP) transceivers are compatible with the Small
Form Factor Pluggable Multi-Sourcing Agreement (MSA). The transceiver consists of four sections: the
LD driver, the limiting amplifier, the VCSEL laser and the PIN photo-detector .The module data link up
to 550M in 50/125um multi mode fiber.
The optical output can be disabled by a TTL logic high-level input of Tx Disable, and the system also can
disable the module via I2C. Tx Fault is provided to indicate that degradation of the laser. Loss of signal
(LOS) output is provided to indicate the loss of an input optical signal of receiver or the link status with
partner. The system can also get the LOS (or Link)/Disable/Fault information via I2C register access.
I.
Pin Descriptions
Pin
1
Symbol
I/O Type
RX_LOS
Output
Functional Description
Receiver Loss of Signal, Logic high, Open collector compatible
4.7K to 10K Ohm pulls up to VDDT on host.
2
RGND
Receiver Ground
3
RGND
Receiver Ground
4
MOD_DEF(0)
Output
MOD_DEF(1)
Input
MOD_DEF(2)
I/O
TX_DISABLE
Input
5
6
7
Module Definition 0 TTL Low
Module Definition 1 Two wire serial ID interface SCL, 4.7K to
10K Ohm pull up to VDDT on host
Module Definition 2 Two wire serial ID interface SDA, 4.7K to
10K Ohm pull up to VDDT on host
Transmitter Disable – Module disable on high or open (No Used)
8
TGND
Transmitter Ground
9
TGND
Transmitter Ground
10
TX_FAULT
11
Output
Transmitter Fault Indication, Logic high, open collector
Compatible , 4.7K to 10K Ohm pull up to VDDT on host
Receiver Ground
RGND
12
-RX_DAT
Output
Inverse Received Data Out, Differential PECL, at AC couple
13
+RX_DAT
Output
Received Data Out, Differential PECL, at AC couple
14
RGND
15
VDDR
Input
Receiver Power
16
VDDT
Input
Transmitter Power
17
TGND
18
+TX_DAT
Input
Transmitter Data In, Differential PECL, AC couple
19
-TX_DAT
Input
Inverse Transmitter Data In, Differential PECL, AC couple
20
TGND
Receiver Ground
Transmitter Ground
Transmitter Ground
Page 2
REV:1.0
II.
Absolute Maximum Ratings
Parameter
Storage Temperature
Storage Ambient Humidity
Power Supply Voltage
Signal Input Voltage
Receiver Damage Threshold
Symbol
Ts
HA
VCC
Min.
-40
5
0
0
5
Typ.
Max.
85
95
6
Vcc
Unit
ºC
%
V
V
dBm
Note
III. Recommended Operating Conditions
Parameter
Case Operating Temperature
Ambient Humidity
Power Supply Voltage
Power Supply Current
Power Supply Noise Rejection
Data Rate
Transmission Distance
Coupled Fiber
IV.
Symbol
Tcase
HA
VCC
ICC
Min.
0
5
4.75
Typ.
5
Max.
70
70
5.25
300
100
1250/1250
550
Unit
ºC
%
V
mA
mVp-p
Mbps
m
Multi mode fiber
Note
Non-condensing
100Hz to 1MHz
TX Rate/RX Rate
50/125um MMF
Specification of Transmitter
Parameter
Average Output Power
Extinction Ratio
Center Wavelength
Spectrum width(RMS)
Transmitter OFF Output Power
Differential Line Input Impedance
Jitter P-P
Output Eye Mask
Symbol
Min.
Typ.
Max.
POUT
-9
-3
ER
9
λC
830
850
860
σ
1
POff
-45
RIN
90
100
110
0.1
Jp-p
Compliant with IEEE802.3 z (class 1
laser safety)
Note (1): Measure at 2^7-1 NRZ PRBS pattern.
Note (2): Transmitter eye mask definition.
Page 3
Unit
dBm
dB
nm
nm
dBm
Ohm
UI
Note
VCSEL Laser
Note (1)
Note (2)
REV:1.0
V.
Specification of Receiver
Parameter
Input Optical Wavelength
Receiver Sensitivity
Input Saturation Power
(Overload)
Los Of Signal Assert
Los Of Signal De-assert
LOS Hysteresis
Symbol
λIN
PIN
Min.
Typ.
Max.
770
850
860
PSAT
0
PA
PD
PA-PD
-38
-18
Unit
nm
dBm
Note
PIN-TIA
Note (1)
dBm
0.5
dBm
dBm
dB
-20
6
2
Note (2)
Note (1): Measured with Light source 850nm, ER=9dB; BER =<10^-12 @PRBS=2^7-1 NRZ.
Note (2): When LOS de-asserted, the RX data+/- output is signal output.
VI.
Electrical Interface Characteristics
Parameter
Transmitter
Total Supply Current
Transmitter Disable Input-High
Transmitter Disable Input-Low
Transmitter Fault Input-High
Transmitter Fault Input-Low
Receiver
Total Supply Current
LOSS Output Voltage-High
LOSS Output Voltage-Low
Note (1): A (TX) + B (RX) = 300mA
Symbol
Min.
ICC
VDISH
VDISL
VDISL
VTxFH
ICC
VLOSH
VLOSL
Typ.
Max.
Unit
Note
A
Vcc+0.3
0.8
Vcc+0.3
0.8
mA
V
V
V
V
Note (1)
2
0
2
0
B
Vcc+0.3
0.8
mA
V
V
Note (1)
2
0
(Not include termination circuit)
Page 4
LVTTL
REV:1.0
VII. Mechanical Specifications (Unit: mm)
XGGB-8512-02
Appendix A. Document Revision
Version No.
1.0
Date
2011-10-26
Description
Preliminary datasheet
Page 5
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