HG Genuine
GBIC Transceiver
MGB-243S
GBIC Transceiver
MGB-243S
Features：
Operating temperature
range 0°C to +70°C
Operating bit rate
1250Mbps
Hot-pluggable
capability.
Low power dissipation
1310 nm FP laser
SCA-2 electrical
interface
Single 3.3V/5V power
supply
Differential PECL
input and output
TTL signal detect
indicator
Duplex SC optical
interface
Detailed product
information in
E
2
PROM
Applications：
Gigabit Ethernet
Switch to Switch interface
Router/server interface
Other optical transmission systems
Description:
MGB-243S is compliant with Gigabit Interface Converter (GBIC)
specification Rev5.5. It meets the requirements of IEEE 802.3 Gigabit
Ethernet standard and ANSI specifications for fiber channel. It can be inserted
in or removed from host chassis without shutting power of the host system.
MGB-243S Operating Wavelength is 1310nm, it enables cost-effective data
transmission over optical fibers at a distance of 10 km. The operating voltage
is +3.3V or +5V.
Specifications:
Absolute Maximum Ratings
Parameter
Supply Voltage
Ambient Operating
Temperature
Storage Temperature
Relative Humidity
Data Input Voltage
Transmitter Differential
Input Voltage
Operating Current
Symbol
V
CC
T
C
T
stg
RH
TX-DAT
±TX-DAT
Iop
—
Min
-0.5
0
-40
5
-0 .5
Typ
Max
6
70
85
95
VDDT
2000
300
Unit
V
°C
°C
%
V
mVp-p
mA
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HG Genuine
Transceiver Electrical Characteristics
Parameter
Surge Current
Power Dissipation
Symbol
I
SURGE
P
DISS
0.5
0.8
Min
Typ
Max
30
1.0
1.5
Unit
mA
W
W
GBIC Transceiver
MGB-243S
Note
3.3V
5V
Transmitter Electro-optical Characteristics
Parameter
Output Optical Power
9/125um SMF
Optical Extinction Ratio
Center Wavelength
Spectral Width
Optical Rise /Fall Time
Total Contributed Jitter
Max. Pout TX-DISABLE Asserted
Output Eye
Differential Input Voltage
Transmit Fault Output-Low
Transmit Fault Output-High
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
Receiver Electro-optical Characteristics
Parameter
Input Optical Power
Operating Center Wavelength
Return Loss
Receiver Loss of Signal-TTL low
Receiver Loss of Signal-TTL high
Receiver Differential Output Voltage
Receiver Output Rise Time
Receiver Output Fall Time
Receiver Loss of Light Load
Receiver Loss of Signal
Output Voltage -low
Receiver Loss of Signal
Output Voltage -high
Symbol
P
in
λ
C
ORL
PRX-LOS A
PRX-LOS D
±RX_DAT
TrRx_DAT
TfRX_DAT
RX-LOSLoad
Symbol
P
O
Min
-9.5
9
Typ
7
Max
-3
Unit
dBm
avg
dB
nm
nm rms
ns
ps p-p
dBm
V
V
V
us
ms
ms
us
us
Note
λ
C
t
r
/t
f
T
J
P
OFF
V
DIFF
TX-FAULTL
TX-FAULTH
1280
1310
1340
2.8
0.26
227
-35
Compliant with IEEE802.3z
0.65
0
2.4
2.0
0.5
VCC
10
1
300
100
10
t-off
t-on
t-init
t-fault
t-reset
Min
-23
1200
12
Typ
7
Max
-3
1660
-23
Unit
7
Note
2 -1 PRBS
BER<10
-12
dBm
nm
dB
dBm
dBm
mV-
p
-31
370
0.25
0.25
4.7
0.0
VCC-0.5
2000
0.35
0.35
10
0.5
V
CC
+0.3
ns
ns
KΩ
V
V
RX-LOSL
RX-LOSH
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HG Genuine
Receiver Loss of Signal
Assert Time _Logic low to high
Receiver Loss of Signal
Assert Time _Logic high to low
tA, RX-LOS
tD, RX-LOS
100
100
GBIC Transceiver
MGB-243S
us
us
Pin Figure：
Figure 1
Pin Definitions:
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Signal Name
RX-LOS
RGND
RGND
MOD_DEF(0)
MOD_DEF(1)
MOD_DEF(2)
TX-DISABLE
TGND
TGND
TX-FAULT
RGND
-RX_DAT
+RX_DAT
RGND
VDDR
VDDT
TGND
+TX_DAT
-TX_DAT
TGND
Receiver Ground
Receiver Ground
TTL Low
SCL Serial Clock Signal
SDA Serial Data Signal
Transmitter Disable
Transmitter Ground
Transmitter Ground
Transmit Fault
Receiver Ground
Receiver Data, Differential PECL, AC coupled
Receiver Data, Differential PECL, AC coupled
Receiver Ground
Receiver supply
Transmitter supply
Transmitter Ground
Transmitter Data, Differential PECL, AC coupled
Transmitter Data, Differential PECL, AC coupled
Transmitter Ground
Description
Receiver Loss of Signal, TTL high, open collector
Functions Description：
The laser is driven by a LD driver IC which converts differential input LVPECL (3.3V) or PECL (5V) logic
signals into an analog laser driving current.
MGB-243X complies with Module Definition 4. It features an EEPROM that contains the detailed product
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HG Genuine
GBIC Transceiver
MGB-243S
information stored for retrieval by host equipment. This information is accessed via the 2-wire serial CMOS
EEPROM protocol of ATMEL AT24C01A.
TX_Fault
When sensing an improper power level in the laser driver, the GBIC set this signal high and turns off the Laser.
TX_FAULT can be reset with the TX_DISABLE line. The signal is in TTL level.
TX_Disable
The TX_DISABLE signal is high (TTL logic "1") to turn off the laser output. The laser will turn on within
1ms when TX_DISABLE is low (TTL logic "0").
Receive Loss (RX_LOS)
The RX_LOS is high (logic "1") when there is no incoming light from the companion transceiver. This signal
is normally used by the system for the diagnostic purpose. The signal is operated in TTL level.
Figure 2 shows the internal frame of GBIC, Figure3、4 show the typical eye diagrams of this product.
RECEIVEER
RXLOS
RXd-
RXd+
jimper
DATA+
VCC
LA
DATA-
CONNECTOR
MOD_DEF(2)
MOD_DEF(1)
MOD_DEF(0
)
TRANSIMITER
BIAS
VCC
DATA+
PM
TX-FAULT
Figure 2: Internal Frame
LD
TXd-
TXdis
LASER DRIVER
TXd+
PT
ID E
2
PROM
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HG Genuine
GBIC Transceiver
MGB-243S
Figure 3: Receiver Eye Diagram
Figure4: Transmitter Eye Diagram
Note: measured with a 2
7
-1 PRBS test pattern @1.25Gbps
Interface Circuit
Figure 5 shows the recommended interface circuit for GBIC application.
Host Board
DC+5V/+3.3V
4.7K to 10K
TX-DISABLE
GBIC Module
DC+5V/+3.3V
4.7K to 10K
TX-FAULT
SerDat OUT+
TX-DAT
TX-DATQ
DC+5V/+3.3V
Z0=75
Z0=75
PECL
Note A
2X180
SerDat OUT-
Laser
driver
DC+5V/+3.3V
serDat IN-
Z0=75
Z0=75
RX-DATQ
RX-DAT
PECL
DC+5V/+3.3V
4.7K to 10K
serDat IN+
Amplifier
RX-LOS
DC+5V/+3.3V
3X4.7K to 10K
MOD-DEF(2)
MOD-DEF(1)
MOD-DEF(0)
EEPROM
GNDR
Figure 5: Interface Circuit
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Microchip MCU
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