Product Description
F-tone Networks’s FTCS-1312-20Dxx-GC Small Form Factor Pluggable (SFP) transceivers are compatible with the Small Form Factor Pluggable Multi-Sourcing Agreement (MSA). The transceiver consists of five sections: the LD driver, the limiting amplifier, the digital diagnostic monitor, the FP laser and the PIN photo-detector.The module data link up to 10KM in 9/125um single 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.

Product Features
● Up to 1.25Gb/s data links
● 1310nm FP laser transmitter and PIN photo-detector
● Up to 20km on 9/125µm SMF
● Hot-pluggable SFP footprint
● Duplex LC/UPC type pluggable optical interface
● Low power dissipation
● Metal enclosure, for lower EMI
● RoHS compliant and lead-free
● Single +3.3V power supply
● Support Digital Diagnostic Monitoring interface
● Compliant with SFF-8472
● Meet ESD requirements, resist 8KV direct contact voltage
● Case operating temperature
● Commercial: 0°C to +70°C
      Extended: -10°C to +80°C
      Industrial: -40°C to +85°C

Applications
● Switch to Switch Interface
● Gigabit Ethernet
● 1xFiber channel Application
● Switched Backplane Applications
● Router/Server Interface
● Other Optical Links

Absolute Maximum Ratings 

Parameter

Symbol

Min.

Typ.

Max.

Unit

Note

Storage Temperature

Ts

-40

85

ºC

Relative Humidity

RH

5

95

%

Power Supply Voltage

VCC

-0.5

4

V

Signal Input Voltage

-0.3

Vcc+0.3

V

Receiver Damage Threshold

+5

dBm

 

Recommended Operating Conditions

Parameter

Symbol

Min.

Typ.

Max.

Unit

Note

Case Operating Temperature

Tcase

0

70

ºC

FTCS-1312-20D-GC

-10

80

FTCS-1312-20DE-GC

-40

85

FTCS-1312-20DI-GC

Power Supply Voltage

VCC

3.13

3.3

3.47

V

Power Supply Current

ICC

250

mA

Power Supply Noise Rejection

100

mVp-p

100Hz to 1MHz

Data Rate

1250/1250

Mbps

TX Rate/RX Rate

Transmission Distance

20

KM

Coupled Fiber

Single mode fiber

9/125um SMF

 

Specification of Transmitter

Parameter

Symbol

Min.

Typ.

Max.

Unit

Note

Average Output Power

POUT

-9

-3

dBm

Note (1)

Extinction Ratio

ER

9

dB

Center Wavelength

λC

1270

1310

1360

nm

Side Mode Suppression Ratio

SMSR

-

dB

Spectrum Bandwidth (RMS)

σ

3.5

nm

Transmitter OFF Output Power

POff

-45

dBm

Output Eye Mask

Compliant with IEEE802.3 z (class 1 laser safety)

Note (2)

Notes:
1.Measure at 2^7-1 NRZ PRBS pattern
2.Transmitter eye mask definition

Specification of Receiver

Parameter

Symbol

Min.

Typ.

Max.

Unit

Note

Input Optical Wavelength

λIN

1270

1610

nm

PIN-TIA

Receiver Sensitivity

PIN

-20

dBm

Note (1)

Input Saturation Power (Overload)

PSAT

-3

dBm

Los Of Signal Assert

PA

-36

dBm

Los Of Signal De-assert

PD

-21

dBm

Note (2)

LOS Hysteresis

PA-PD

0.5

2

6

dB

Notes:
1.Measured with Light source 1310nm, ER=9dB; BER =<10^-12 @PRBS=2^7-1 NRZ

2.When LOS de-asserted, the RX data+/- output is High-level (fixed)

Electrical Interface Characteristics

Parameter

Symbol

Min.

Typ.

Max.

Unit

Note

Power Consumption

P

 

 

0.85

W

 

Supply Current

Icc

 

 

250

mA

 

Transmitter

Single-ended Input Voltage Tolerance

VCC

-0.3

4.0

V

Differential Input Voltage Swing

Vin,pp

200

2400

mVpp

Differential Input Impedance

Zin

90

100

110

Ohm

Transmit Disable Assert Time

5

us

Transmit Disable Voltage

Vdis

Vcc-1.3

Vcc

V

Transmit Enable Voltage

Ven

Vee-0.3

0.8

V

Receiver

Differential Output Voltage Swing

Vout,pp

500

900

mVpp

Differential Output Impedance

Zout

90

100

110

Ohm

Data output rise/fall time

Tr/Tf

100

ps

20% to 80%

LOS Assert Voltage

VlosH

Vcc-1.3

Vcc

V

LOS De-assert Voltage

VlosL

Vee-0.3

0.8

V

 

Mechanical Specifications (Unit: mm)25.4.1 8

Part Number Ordering information

Product part Number

Data Rate

(Mbps)

Media

Wavelength(nm)

Transmission Distance(km)

Temperature Range(Tcase)(

FTCS-1312-20D-GC

1250

Single mode fiber

1310

20

0~70

commercial

FTCS-1312-20DE-GC

1250

Single mode fiber

1310

20

-10~80

extended

FTCS-1312-20DI-GC

1250

Single mode fiber

1310

20

-40~85

industrial

注:“GC”为全国产。