FTGL2025S1TUS - Finisar Corporation

F i n i s a r

Preliminary Product Specification

GPON OLT Class B+ Pigtailed RoHS Compliant Transceiver

FTGL2025S1TUx

PRODUCT FEATURES

• Bi-directional transceivers

operating at 2.488 Gbit/s

downstream, 1.244 Gbit/s upstream

• Di-plexer operation at 1490 nm Tx,

and 1310 nm digital Rx

• Burst-mode APD receiver

• Continuous mode transmitter with

DFB laser

• Built-in digital diagnostic functions

• Standard small form-factor (SFF)

package with fiber pigtailed

SC/UPC connector in compliant

with GR326 and UL 94V0

flammability

• The pigtail comes in a tight buffer

0.9mm, 9/125/250 SMF-28 or

equivalent

• Single 3.3V power supply

• Industrial operating temperature

range: -40°C to 85°C

• Built-in digital diagnostic functions

APPLICATIONS

• GPON OLT Di-plexer

• ITU-T G.984.2 Class B+

Finisar’s FTGL2025FDIUx bi-directional transceivers comply with the ITU-T GPON

standard11 G984.2 Class B+ for operation at 2.488 Gbit/s downstream and 1.244 Gbit/s

upstream. The di-plexer function provides burst-mode APD receiver at 1310nm, and

continuous DFB transmitter at 1490 nm. Digital diagnostics functions are available via

the 2-wire serial bus specified in the SFP MSA1. Details to the EEPROM map for this

module could be made available upon request. Finisar’s FTGL2025FDIUx SFF

transceivers are compatible with the Small Form Factor Multi-Sourcing Agreement

(MSA) 2.

PRODUCT SELECTION FTGL2025S1TUx

x S Standard Pigtail length

FTGL2025S1TUx Pigtailed SFF Product Specification -April, 2008 F i n i s a r

I. Pin Descriptions

Pin Symbol Description/Comments Interface

1 B-M Reset B-M RX Reset Input/LVTTL; Active high and control by the host

2 Reserved Reserved (no connect) Reserved for future application

3 RX GND Receiver Ground.

4 Reserved Reserved (no connect) Reserved for future application

5 Rx Vcc Receive Vcc

6 RX GND MSA 2x5 standard

7 RX Vcc MSA 2x5 standard

8 RX SD MSA 2x5 standard Output/LVTTL; Active high

9 RX D- MSA 2x5 standard Output/LVPECL; DC coupled termination needed on the

host

10 RX D+ MSA 2x5 standar d Output/LVPECL; DC coupled termination needed on the

host

11 TX Vcc MSA 2x5 standard

12 TX GND MSA 2x5 standard

13 TX Dis MSA 2x5 standard Input/LVTTL; Active high and control by the host

14 TX D+ MSA 2x5 standard Input/CML AC coupled with intern al 100Ohms termination

15 TX D- MSA 2x5 standard Input/CML AC coupled with intern al 100Ohms termination

16 TX GND Transmitter Ground

17 SCL Serial clock interface Input; Recommend a tri-state buffer with 10K pull up on the

host

18 SDA Serial data interface I/O; Open drain. Recommend 1K pull up on the host

19 TX Fail Laser safety shut down Output/LVTTL open drain with internal pull up

20 TX GND TX Ground

SFF Pinout Top View (SFF MSA dimension but with bi-directional pigtail)

TOP VIEW

6 7 8 9 10

MS

1 2 3 4 5

15 14 13 12 11

20 19 18 17 16

FTGL2025S1TUx Pigtailed SFF Product Specification -April, 2008 F i n i s a r

II. Absolute Maximum Ratings

Parameter Symbol Min Typ Max Unit Ref.

Maximum Supply Voltage Vcc 0 4.3 V

Storage Temperature TS -40 85

°C

Case Operating Temperature TOP -40 85

°C

Relative Humidity RH 0 95 % 1

Fiber Output Power (no damage) Pf 20 dBm

Optical Input P ower (no damage) PIN 5 dBm

III. Electrical Characteristics (TOP = -40 to 85 °C, VCC = 3.1 t o 3. 5 Vo l ts)

Parameter Symbol Min Typ Max Unit Ref.

Supply Volta g e Vcc 3.00 3.3 3.60 V

Supply Current Icc 450 mA

Transmitter

Input Differential Impedance Rin 100 Ω

Differential Data Input Voltage Vin,pp 500 1600 mV

Transmit Disable Voltage VD 2.0 Vcc V

Transmit Enable Voltage VEN 0 0.8 V

Transmit Disable Assert Time 10

μs

Receiver

Output Differential Im pedance 100 Ω

Differential Data Output Voltage Vout,pp,

LVPECL 500 1800

mV

Data Output Rise and Fall Time tr, tf 350

ps 2

SD Fault VSD fault 0 0.5 V

SD Normal VLOS norm 2.4 Vcc V

Power Supply Rejection PSR 100 mVpp 3

Notes:

1. Non condensing.

2. 20 – 80 %

3. 0.01 to 10 MHz

FTGL2025S1TUx Pigtailed SFF Product Specification -April, 2008 F i n i s a r

IV. Optical Characteristics (TOP = -40 to 85 °C, VCC = 3.00 to 3.60 Vo lts)

Parameter Symbol Min Typ Max Unit Ref.

Cross-talk 1490nm Tx to 1310nm Rx -47 dB

Reflectance 1480- 15 5 0 nm -20 dB

Reflectance 1260- 13 6 0 nm -20 dB

Transmitter

Data Rate (Continuous Wave) BR 2488.32 Mb/s

Center Wavele ngth (CW) λ 1480 1490 1500 nm

Spectral Width (-20dB ) σ 1.0 nm

Side Mode Suppr. Ratio SSR 30 dB

Output Opt . P wr POUT 1.5 +5 dBm 1

Optical Extinction Ratio ER 10 dB

CID 72 bits

Generated Jitter (Additive) Jadd .20 UI 2

Tx Power D.D. Accu racy ±3 dB

Receiver

Data Rate BR 1244.16 Mb/s

Optical Center Wavelength λC 1260 1310 1360 nm

Average Rx Sensitivity RSENS1 -28 dBm 3

Overload -8 dBm

Dynamic Range 15 dB 4

CID 72 bits

SD Assert SDA -31.5 dBm

SD De-Assert SDD -45.0 dBm

SD Hysteresis 0.5 dB

SD Assert/De-Assert Time SDT 1000 ns

Notes:

1. Class 1 Laser Safety per FDA/CDRH and EN (IEC) 60825 regulations.

2. Jitter measurements taken using Agilent OMNIBERT 718 in accordance with GR-253.

3. With worst-case extinction ratio. Measured with a PRBS 223-1 test, 10-10 BER.

4. The receiver operates in burst mode at 1244 Mbs with up to 15dB difference between High and Low

Level for adjacent ONT Cells.

FTGL2025S1TUx Pigtailed SFF Product Specification -April, 2008 F i n i s a r

V. Reset Timing Requirement

VI Fiber Pigtail Specifications

Parameter Symbol Min Typ Max Units Ref.

Fiber Type SMF-28E

Jacket - Tight Buffer 900 μm

Pigtail Length 950 1000 1050 mm

Connector Type SC/UPC

Bending Radius of fiber 25 mm

Tensile Force on Pigtail 2 N

Notes:

VII Environmental Specifications

Industrial operating temperature range:

Parameter Symbol Min Typ Max Units Ref.

Case Operating Temperature Top -40 85 °C

Storage Temperature Tsto -40 100 °C

ONU #A ONU #B

d0

Rx reset

Rx input

CPA reset

d0 = 32bits

d1 > 96bits – d0

d3 = ~3ns

d1

d2

ONU #A ONU #B

Rx output d3 d3

FTGL2025S1TUx Pigtailed SFF Product Specification -April, 2008 F i n i s a r

VIII Regulatory Compliance

Finisar transceivers are Class 1 Laser Products and comply with US FDA regulations.

These products are certified by TÜV and CSA to meet the Class 1 eye safety

requirements of EN (IEC) 60825 and the electrical safety requirements of

EN (IEC) 60950. Copies of certificates are available at Finisar Corporation upon request.

FTGL2025S1TUx Pigtailed SFF Product Specification -April, 2008 F i n i s a r

IX Digital Diagnostic Functions

Finisar FTGL2025S1TUx transceivers support the 2-wire serial communication protocol

as defined in the SFP MSA1.

The standard SFP serial ID provides access to identification information that describes

the transceiver’s capabilities, standard interfaces, manufacturer, and other information.

Additionally, Finisar transceivers provide a unique enhanced digital diagnostic

monitoring interface, which allows real-time access to device operating parameters such

as transceiver temperature, laser bias current, transmitted optical power, received optical

power and transceiver supply voltage. It also defines a sophisticated system of alarm and

warning flags, which alerts end-users when particular operating parameters are outside of

a factory-set normal range.

The SFP MSA defines a 256-byte memory map in E2PROM that is accessible over a

2-wire serial interface at the 8 bit address 1010000X (A0h). The digital diagnostic

monitoring interface makes use of the 8 bit address 1010001X (A2h), so the originally

defined serial ID memory map remains unchanged. The complete interface is described

in Finisar Application Note AN-2030: “Digital Diagnostics Monitoring Interface for SFP

Optical Transceivers”.

The operating and diagnostics information is monitored and reported by a Digital

Diagnostics Transceiver Controller (DDTC) inside the transceiver, which is accessed

through a 2-wire serial interface. When the serial protocol is activated, the serial clock

signal (SCL) is generated by the host. The positive edge clocks data into the SFP

transceiver into those segments of the E2PROM that are not write-protected. The

negative edge clocks data from the SFP transceiver. The serial data signal (SDA) is bi-

directional 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.

For more information, please contact Finisar.

Digital diagnostics for the FTGL2025S1TUx are internally calibrated by default.

FTGL2025S1TUx Pigtailed SFF Product Specification -April, 2008 F i n i s a r

X. Recommended Host Board Supply Filtering Network

VccT

VccR

Module Host Board

1 uH

0.1 uF

0.1 uF 0.1 uF 10 uF

3.3 V

10 uF

FTGL2025S1TUx Pigtailed SFF Product Specification -April, 2008 F i n i s a r

XI. Mechanical Specifications

Finisar’s Small Form Factor (SFF) transceivers are compatible with the dimensions

defined by the SFF Multi-Sourcing Agreement (MSA) 3.

FTGL2025S1TUx

FTGL2025S1TUx Pigtailed SFF Product Specification -April, 2008 F i n i s a r

XII. References

1. Gigabit-capable Passive Optical Networks (GPON): Physical Media Dependent

(PMD) layer specification. ITU-T G.984.2 Class B+, and amendments dated

February 2006.

2. Small Form Factor Pluggable (SFP) Transceiver Multi-Source Agreement (MSA),

September 2000. Documentation is currently available at Finisar upon request.

3. Small Form Factor (SFF) Transceiver Multi-Source Agreement (MSA).

Documentation is currently available at Finisar upon request.

XIII. For More Information

Finisar Corporation

1389 Moffett Park Drive

Sunnyvale, CA 94089-1133

Tel. 1-408-548-1000

Fax 1-408-541-6138

sales@finisar.com

www.finisar.com