1.25GBd SFP (Small Form Pluggable) Long Wavelength (1550nm

CFORTH-SFP-ZX-D Specifications Rev. D00B
Preliminary DATA SHEET
CFORTH-SFP-ZX-D
1.25GBd SFP (Small Form Pluggable) Long Wavelength (1550nm) Transceiver
CFORTH-SFP-ZX-D Overview
CFORTH-SFP-ZX-D SFP optical transceivers are based on Gigabit Ethernet IEEE 802.3 standard and Fiber Channel FC-PI
Rev.5.0 and provide a quick and reliable interface for the GE/FC application. The Digital diagnostics functions are available via
2-wire serial bus specified in the SFP MSA. In addition, they comply with the Small Form Factor Pluggable Multi Sourcing
Agreement (MSA) and SFF-8472.
Product Features

Up to 1.25 GBd bi-directional data links

Compliant with IEEE 802.3z Gigabit Ethernet

Compliant with SFP MSA

Hot-pluggable SFP footprint

Uncooled 1550nm DFB laser transmitter

Duplex LC connector

Built-in digital diagnostic functions

70km – 100km on 9/125um SMF

Single power supply 3.3V

RoHS Compliance

Class 1 laser product complies with EN 60825-1

Operating temperature range: -5℃ to +85℃.
Applications

1.25 GBd Gigabit Ethernet

1.063 GBd Fiber Channel
Ordering Information
Part Number
CFORTH-SFP-ZX-D
Description
GE/FC SFP 1550nm LC Connectors 70km – 100km on SMF, with DOM function.
Page 1
CFORTH-SFP-ZX-D Specifications Rev. D00B
General Specifications
Parameter
Symbol
Min
Max
Unit
1.25
DR
Data Rate
Typ
GBd
1.062
Remarks
IEEE 802.3
FC-PI-2 Rev 5
12
Bit Error Rate
BER
Operating Temperature
TOP
5
85
℃
Case temperature
Storage Temperature
TSTO
 40
85
℃
Ambient temperature
200
300
mA
For electrical power interface
3.3
3.6
V
4
V
10
IS
Supply Current
Input Voltage
VCC
3.15
Maximum Voltage
VMAX
 0.5
For electrical power interface
Optical Characteristics – Transmitter
VCC=3V to 3.6V, TC=-5℃ to +85℃
Parameter
Symbol
Min
Output Optical Power
PTX
Optical Center Wavelength
Optical Modulation Amplitude
Extinction Ratio
SideMode Supression ratio
Typ
Max
Unit
0
5
dBm
C
1540
1570
nm
OMA
174
uW
ER
9
dB
SMSR
30
dB

1
nm
TRF_IN
180
ps
RIN
 120
dB/Hz
Deterministic Jitter Contribution
TX_DJ
60
ps
Total Jitter Contribution
TX_TJ
130
ps
Max
Unit
Spectral Width ( 20dB)
Optical Rise/Fall Time (20% - 80%)
Relative Intensity Noise
Remarks
Class 1 Product
Equivalent extinction ratio
specification for FC
Optical Characteristics – Receiver
VCC=3V to 3.6V, TC=-5℃ to +85℃
Parameter
Symbol
Min
Typ
Optical Receiver Power
PRX
 23
3
dBm
Optical Center Wavelength
C
1270
1600
nm
Remarks
Average
Receiver Sensitivity @ 1.063GBd
RX_SEN1
 23
dBm
FC-PI-2 Rev.5
Receiver Sensitivity @ 1.25GBd
RX_SEN2
 23
dBm
IEEE 802.3
 14.5
dBm
IEEE 802.3
 18
Stressed Rx Sens @ 1.25GBd
Optical Return Loss
ORL
12
Receiver Electrical 3dB Upper cutoff
1500
frequency
Loss of Signal-Asserted
PLOS_A
Loss of Signal-Deasserted
PLOS_D
Loss of Signal-Hysteresis
dB
 30
dBm
 23
0.5
MHz
dBm
dB
Page 2
CFORTH-SFP-ZX-D Specifications Rev. D00B
Electrical Characteristics – Transmitter
VCC=3V to 3.6V, TC=-5℃ to +85℃
Parameter
Symbol
Min
RIN
Input differential impedance
Typ
Max
100
Unit
Ω
VIN_PP
250
1200
mV
Transmit disable voltage
VD
VCC1.3
VCC
V
Transmit enable voltage
VEN
VEE
VEE+0.8
V
10
us
Single ended data input swing
Transmit disable assert time
Remarks
Non condensing
Electrical Characteristics – Receiver
VCC=3V to 3.6V, TC=-5℃ to +85℃
Parameter
Single ended data output swing
Data output rise/fall time (20%-80%)
LOS Fault
LOS Normal
Symbol
Min
Typ
Max
Unit
VOUT_PP
300
400
800
mV
100
175
ps
TR
VLOS_Fault
VCC0.5
VCC_HOST
V
VLOS_normal
VEE
VEE+0.5
V
Remarks
Page 3
CFORTH-SFP-ZX-D Specifications Rev. D00B
Digital Diagnostic Functions
CFORTH-SFP-ZX-D support the 2-wire serial communication protocol as defined in the SFP MSA. Digital diagnostic information
are accessible over the 2-wire interface at the address 0xA2. Digital Diagnostics for CFORTH-SFP-ZX-D 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.
Page 4
CFORTH-SFP-ZX-D Specifications Rev. D00B
Block Diagram of Transceiver
TX_FAULT
ELECTRICAL
TX_DISABLE
TX_DATA
TX_DATA\
Safety Control
LD Driver
RX_DATA
RX_DATA\
Limiting Amp
LOS Detect
OPTICAL
DUPLEX LC
RECEPTACLE
RX_LOS
Micro
Controller
MOD_DEF2
MOD_DEF1
MOD_DEF0
PRE AMP
MOD DEF
OPTICAL SUBASSEMBLY
Transmitter Section
The DFB 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. 1550 nm DFB 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.
Page 5
CFORTH-SFP-ZX-D Specifications Rev. D00B
Dimensions
ALL DIMENSIONS ARE ±0.2mm UNLESS OTHERWISE SPECIFIED
UNIT: mm
Page 6
CFORTH-SFP-ZX-D Specifications Rev. D00B
PCB Layout Recommendation
Page 7
CFORTH-SFP-ZX-D Specifications Rev. D00B
Electrical Pad Layout
Towards
ASIC
20
11
1
10
Towards
Bezel
Page 8
CFORTH-SFP-ZX-D Specifications Rev. D00B
Pin Assignment
PIN #
Symbol
Description
1
VEET
2
TFAULT
3
TDIS
4
MOD_DEF (2)
Module Definition 2. Data line for serial ID
5
MOD_DEF (1)
Module Definition 1. Clock line for serial ID
6
MOD_DEF (0)
Module Definition 0. Grounded within the module
7
Rate Select
8
LOS
Loss of Signal indication. Logic 0 indicates normal operation
9
VEER
Receiver ground (common with transmitter 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)
15
VCCR
Receiver power supply
16
VCCT
Transmitter power supply
17
VEET
Transmitter ground (common with receiver ground)
18
TD+
Transmitter Non-Inverted DATA in. AC coupled
19
TD–
Transmitter Inverted DATA in. AC coupled
20
VEET
Transmitter ground (common with receiver ground)
Transmitter ground (common with receiver ground)
Remarks
Circuit ground is isolated
from chassis ground
Transmitter Fault. Not supported
Transmitter Disable. Laser output disable on high or open
Disabled: TDIS>2V or open
Enabled: TDIS<0.8V
Should Be pulled up with
4.7k – 10k ohm on host
board to a voltage between
2V and 3.6V
No connection required
LOS is open collector output
Circuit ground is isolated
from chassis ground
Circuit ground is isolated
from chassis ground
Circuit ground is connected
to chassis 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. Fiber Channel Draft Physical Interface Specification (FC-PI-2 Rev.5).
4. Digital Diagnostics Monitoring Interface for Optical Transceivers – SFF-8472.
5. Fiber Channel Physical and Signaling Interface (FC-PH/PH2/PH3).
Page 9
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