155M 1.25G SFP  

1000BASE-T Copper SFP Transceiver

LA-CT-G

SFP-1000BASE-T Copper Small Form Pluggable (SFP) transceivers are based on the SFP Multi Source Agreement (MSA). They are compatible with the Gigabit Ethernet and 1000BASE-T standards as specified in

1000BASE-T Copper SFP Transceiver

LA-CT-G

SFP-1000BASE-T Copper Small Form Pluggable (SFP) transceivers are based on the SFP Multi Source Agreement (MSA). They are compatible with the Gigabit Ethernet and 1000BASE-T standards as specified in

SFP-1000BASE-T Copper Small Form Pluggable (SFP) transceivers are based on the SFP Multi Source Agreement (MSA). They are compatible with the Gigabit Ethernet and 1000BASE-T standards as specified in IEEE Std 802.3. The 1000BASE-T physical layer IC (PHY) can be accessed via I2C, allowing access to all PHY settings and features.

The 1000BASE-T uses the SFP's RX_LOS pin for link indication. If pull up SFP's TX_DISABLE pin,  PHY IC be reset.

+3.3V Volt Electrical Power Interface

The SFP-1000BASE-T/SFP-1000BASE-T-SGMII has an input voltage range of 3.3 V +/- 5%. The 4V maximum voltage is not allowed for continuous operation.

Parameter

Symbol

Min

Typ

Max

unit

Notes/Conditions

Supply Current

Is

 

320

375

mA

1.2W max power over full range of voltage and temperature.

See caution note below

Input Voltage

Vcc

3.13

3.3

3.47

V

Referenced to GND

Maximum Voltage

Vmax

 

 

4

V

 

Surge Current

Isurge

 

 

30

mA

Hot plug above steady state

current.  See caution note

below

Low-Speed Signals,  Electronic Characteristics

MOD_DEF(1)  (SCL)  and  MOD_DEF(2)  (SDA),  are  open  drain  CMOS  signals  (see section VII, "Serial Communication Protocol").   Both MOD_DEF(1) and MOD_DEF(2) must be pulled up to host_Vcc

Parameter

Symbol

Min

Max

unit

Notes/Conditions

SFP Output LOW

VOL

0

0.5

V

 

4.7k to 10k pull-up to host_Vcc,

measured at host side of connector

SFP Output HIGH

VOH

host_Vcc -0.5

host_Vcc + 0.3

V

 

4.7k to 10k pull-up to host_Vcc,

measured at host side of connector

SFP Input LOW

VIL

0

0.8

V

4.7k to 10k pull-up to Vcc,

measured at SFP side of connector

 

SFP Input HIGH

VIH

2

Vcc + 0.3

V

4.7k to 10k pull-up to Vcc,

measured at SFP side of connector

High-Speed Electrical Interface,  Transmission Line-SFP

All high-speed signals are AC-coupled internally.

Parameter

Symbol

Min

Typ

Max

unit

Notes/Conditions

Line Frequency

fL

 

125

 

MHz

5-level encoding, per IEEE 802.3

Tx Output Impedance

Zout,TX

 

100

 

Ohm

Differential, for all frequencies between

1MHz and 125MHz 

Rx Input Impedance

Zin,RX

 

100

 

Ohm

Differential, for all frequencies between

1MHz and 125MHz 

High-Speed Electrical Interface,  Host-SFP

Parameter

Symbol

Min

Typ

Max

unit

Notes/Conditions

Single ended data input swing

Vinsing

250

 

1200

mV

 

Single ended

Single ended data output swing

Voutsing

350

 

800

mV

Single ended

Rise/Fall Time

Tr,Tf

 

175

 

psec

20%-80%

Tx Input Impedance

Zin

 

50

 

Ohm

Single ended

General Specifications

Parameter

Symbol

Min

Typ

Max

unit

Notes/Conditions

Data Rate

BR

10

 

1000

Mb/sec

IEEE 802.3 compatible.

See Notes 2 through 4 below

Cable Length

L

 

 

100

m

Category 5 UTP.  BER

Environmental Specifications

Parameter

Symbol

Min

Typ

Max

unit

Notes/Conditions

Operating Temperature

Top

0

 

70

°C

Case temperature

Storage Temperature

Tsto

-40

 

85

°C

Ambient temperature


Ordering Information
LA-CT-G Link Indicator on RX_LOS Pin: Yes
Support 1000base-X: Yes(Default)
Support SGMII: Yes

Ethernet

Telecom

Fiber Channel

Date Version Description Download
2020-06-12 PDF LA-CT-G
Datasheet
Photo Model Description
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