Gigatech SRK25ZJP-S User manual

SFP-GD-BZ54-GT
SFP 1000Base-BX SM LC TX:1550 RX:1490 96KM DDM MRV Compatible
GigaTech Products, Inc. - 3188 Airway Ave, Suite G, Costa Mesa, CA 92626 -877-7-GIGATEC
www.GigaTechProducts.com
The GigaTech Products SFP-GD-BZ54-GT is programmed to be fully compatible and functional with all
intended MRV SINGLE FIBER BIDIRECTIONAL switching devices. This SFP optical transceiver is designed
for IEEE 802.3 Gigabit Ethernet interconnects and is designed to be compliant with SFF-8472 SFP Multi-
source Agreement (MSA). This module is designed for single mode simplex fiber and operates at a
nominal transmit wavelength of 1550nm and nominal receive wavelength of 1490nm.
Features:
Up to 1.25GBd bi-directional data links
Hot-pluggable SFP footprint
1550nm DFB laser transmitter
Simplex LC Connectors
Built in Digital Diagnostics
Up to 80km over 9/125 SMF
Single power supply 3.3V
Operating temperature range
C-Temp: 0℃to 70℃
Compliance:
IEEE 802.3z Gigabit Ethernet
SFP MSA SFF-8472
RoHS
Class 1 laser product EN 60825
Applications
• 1.25GBd Gigabit Ethernet
Warranty:
GigaTech Branded Optical Transceivers- Lifetime Warranty

SFP-GD-BZ54-GT
SFP 1000Base-BX SM LC TX:1550 RX:1490 96KM DDM MRV Compatible
GigaTech Products, Inc. - 3188 Airway Ave, Suite G, Costa Mesa, CA 92626 -877-7-GIGATEC
www.GigaTechProducts.com
General Specifications
Parameter
Symbol
Min
Typ
Max
Unit
Remarks
Data Rate
DR
1.25
GBd
IEEE 802.3
Bit Error Rate
BER
10-12
Input Voltage
VCC
3
3.3
3.6
V
Maximum Voltage
Vmax
-0.5
4
V
Electric Power Interface
Supply Current
Is
230
300
mA
Electric Power Interface
Storage Temperature
Tsto
-40
85
℃
Ambient Temperature
Optical Characteristics - Transmitter
Parameter
Symbol
Min
Typ
Max
Unit
Remarks
Optical Center Wavelength

1540
1550
1560
nm
Output Optical Power
Ptx
0
5
dBm
Class 1 Product
Optical Modulation Amp
OMA
174
uW
Extinction Ratio @ 1.25GBd
ER
9
dB
Spectral Width (RMS)

1
Nm
Relative Intensity Noise
RIN
-120
dB/Hz
Optical Rise/Fall Time
TRF_IN
150
260
ps
Deterministic Jitter Contribute
TX_  DJ
30
60
ps
Total Jitter Contribution
TX_  TJ
60
120
ps
Optical Characteristics - Receiver
Parameter
Symbol
Min
Typ
Max
Unit
Remarks
Optical Center Wavelength

C
1480
1490
1500
nm
Optical Receive Power
PRX
0
dBm
Average
Receiver Sensitivity @ 1.25GBd
PSENS1
-25
dBm
IEEE 802.3
Optical Return Loss
ORL
14
dB
Optical Isolation
ISO
-40
dB
LOS Assert
LOSA
-30
dBm
LOS De-Assert
LOSD
-23
dBm
LOS Hysteresis
0.5
dB
Electrical Characteristics – Transmitter
Parameter
Symbol
Min
Typ
Max
Unit
Remarks
Input differential impedance
Rin
100
Ω
Non Condensing
Single ended data input swing
VIN_PP
250
1200
mV
Transmit Disable Voltage
VD
VCC -1.3
VCC
V
Transmit Enable Voltage
VEN
VEE
VEE +0.8
V
Transmit Disable Assert Time
10
us
Electrical Characteristics – Receiver
Parameter
Symbol
Min
Typ
Max
Unit
Remarks
Single ended data output swing
VOUT_PP
300
400
800
mV
Data output rise/fall time
TR
300
ps
20%-80%
LOS Fault
VLOS_F
VCC -0.5
VCC_HOST
V
LOS Normal
VLOS_N
VEE
VEE +0.5
V

SFP-GD-BZ54-GT
SFP 1000Base-BX SM LC TX:1550 RX:1490 96KM DDM MRV Compatible
GigaTech Products, Inc. - 3188 Airway Ave, Suite G, Costa Mesa, CA 92626 -877-7-GIGATEC
www.GigaTechProducts.com
Digital Diagnostic Functions
The SFP support the 2-wire serial communication protocol as defined in the SFF 8472. Digital diagnostic
information are accessible over the 2-wire interface at the address 0xA2. Digital Diagnostics are
internally calibrated by default. A micro controller unit inside the transceiver gathers the monitoring
information and reports the status of transceiver.
Transceiver Temperature, internally measured, represented as a 16 bit signed twos complement value
in increments of 1/256 degrees Celsius, Temperature accuracy is better than ±3 degrees Celsius over
specified operating temperature and voltage.
Transceiver Supply Power, internally measured, represented as a 16 bit unsigned integer with the
voltage defined as the full 16 bit value (0 –65535) with LSB equal to 100 μVolt, yielding a total range of
0 to +6.55 Volts.
Transceiver TX bias current, internally measured, represented as a 16 bit unsigned integer with the
current defined as the full 16 bit value (0 –65535) with LSB equal to 2 μA, yielding a total range of 0 to
131mA. Accuracy is better than ±10% over specified operating temperature and voltage.
Transceiver TX output power, internally measured, represented as a 16 bit unsigned integer with the
power defined as the full 16 bit value (0 –65535) with LSB equal to 0.1 μW. Data is assumed to be based
on measurement of laser monitor photodiode current. Accuracy is better than ±3dB over specified
temperature and voltage. Data is not valid when the transmitter is disabled.
Transceiver RX received optical power, internally measured, represented as a 16 bit unsigned integer
with the power defined as the full 16 bit 35 value (0 –65535) with LSB equal to 0.1 μW. Accuracy is
better than ±3dB over specified temperature and voltage.

SFP-GD-BZ54-GT
SFP 1000Base-BX SM LC TX:1550 RX:1490 96KM DDM MRV Compatible
GigaTech Products, Inc. - 3188 Airway Ave, Suite G, Costa Mesa, CA 92626 -877-7-GIGATEC
www.GigaTechProducts.com
Block Diagram of Transceiver
Transmitter Section
The VCSEL driver accept differential input data and provide bias and modulation currents for driving a
laser. An automatic power-control (APC) feedback loop is incorporated to maintain a constant average
optical power. 1310nm Fabry-Perot laser in an eye safe optical subassembly (OSA) mates to the fiber
cable.
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”).
TX_FAULT- When the TX_FAULT signal is high, output indicates a laser fault of some kind. Low indicates
normal operation.
Receiver Section- The receiver utilizes a PIN detector integrated with a trans-impedance preamplifier in
an OSA. This OSA is connected to a Limiting Amplifier which providing post-amplification quantization,
and optical signal detection. The limiting Amplifier is AC-coupled to the transimpedance amplifier, with
internal 100Ω differential termination.
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.
Controller Section- The micro controller unit monitors the operation information of LD driver and
Limiting Amplifier and report these status to the customer.

SFP-GD-BZ54-GT
SFP 1000Base-BX SM LC TX:1550 RX:1490 96KM DDM MRV Compatible
GigaTech Products, Inc. - 3188 Airway Ave, Suite G, Costa Mesa, CA 92626 -877-7-GIGATEC
www.GigaTechProducts.com
Dimensions
ALL DIMENSIONS ARE ±0.2mm UNLESS OTHERWISE SPECIFIED

SFP-GD-BZ54-GT
SFP 1000Base-BX SM LC TX:1550 RX:1490 96KM DDM MRV Compatible
GigaTech Products, Inc. - 3188 Airway Ave, Suite G, Costa Mesa, CA 92626 -877-7-GIGATEC
www.GigaTechProducts.com
PCB Layout Recommendation

SFP-GD-BZ54-GT
SFP 1000Base-BX SM LC TX:1550 RX:1490 96KM DDM MRV Compatible
GigaTech Products, Inc. - 3188 Airway Ave, Suite G, Costa Mesa, CA 92626 -877-7-GIGATEC
www.GigaTechProducts.com
Electrical Pad Layout

SFP-GD-BZ54-GT
SFP 1000Base-BX SM LC TX:1550 RX:1490 96KM DDM MRV Compatible
GigaTech Products, Inc. - 3188 Airway Ave, Suite G, Costa Mesa, CA 92626 -877-7-GIGATEC
www.GigaTechProducts.com
Pin Assignment
PIN #
Symbol
Description
Remarks
1
VEET
Transmitter ground (common with receiver
ground)
Circuit ground is isolated
from chassis ground
2
TFAULT
Transmitter Fault
3
TDIS
Transmitter Disable. Laser output disable on
high or open
Disabled: TDIS>2V or open
Enabled: TDIS<0.8V
4
SDA
Data line for serial ID
Should Be pulled up with
4.7k –10k ohm on host
board to a voltage between
2V and 3.6V
5
SCL
Clock line for serial ID
6
MOD_ABS
Module Absent. Ground within the module
7
RS0
No Connection required
8
LOS
Loss of Signal indication. Logic 0 indicates
normal operation
LOS is open collector
output
9
RS1
+3.3V Power Supply
Circuit ground is isolated
from chassis ground
10
VEER
Receiver ground (common with transmitter
ground)
11
VEER
Receiver ground (common with transmitter
ground)
12
RD-
Receiver Inverted DATA out. AC coupled
13
RD+
Receiver Non-inverted DATA out. AC coupled
14
VEER
Receiver ground (common with transmitter
ground)
Circuit ground is isolated
from chassis ground
15
VCCR
Receiver power supply
16
VCCT
Transmitter power supply
Same as Pin# 1
17
VEET
Transmitter ground (common with receiver
ground)
Circuit ground is connected
to chassis ground
18
TD+
Transmitter Non-inverted DATA out. AC
coupled
19
TD-
Transmitter Inverted DATA out. AC coupled
20
VEET
Transmitter ground (common with receiver
ground)
Circuit ground is connected
to chassis ground
References
1. IEEE standard 802.3. IEEE Standard Department, 2002.
2. Small Form Factor Pluggable (SFP) Transceiver Multi-Source Agreement (MSA), September 2000.
3. Digital Diagnostics Monitoring Interface for Optical Transceivers –SFF-8472.