Delta Electronics LCP-1250RJ3SR-L User Manual

LCP-1250RJ3SR-L

RoHS Compliant Copper Small Form-factor Pluggable (SFP) Transceiver for Gigabit Ethernet with Rx-Los Indicator

system supports the SGMII interface with no clock mode on SFP cage. The SGMII interface without clock is selected by setting HWCFG_MODE[3:0] bits to ‘0100’.

Features

z Compatible with specifications for IEEE

802.3z/Gigabit Ethernet

z Compliant with MSA specifications for small

Form Factor Pluggable （SFP）Ports

z Hot-pluggable SFP footprint

z 1000 BASE-T operation in the host system with

SerDes interface (Default)

Description

The LCP-1250RJ3SR-L is a 3.3V copper small form-factor pluggable (SFP) transceiver. It offers full duplex 1000 Mb/s Ethernet by transporting data over CAT 5 UTP cable（category 5 unshielded twisted pair）, with RJ-45 connection. It takes signals from both CAT 5 UTP cable and the SFP SerDes interface.

The LCP-1250RJ3SR-L provides the SFP’s RX_LOS pin for the link indication of cable side, and also, 1000Base-T auto-nego-

-tiation is enabled at default over cable link.

The system host should disable 1000 BASE-X auto-negotiation while LCP-1250RJ3SR-L is used.

The Gigabit Ethernet SFP ports on host

systems can work well plugging with both of Delta fible SFP transceiver and Delta copper SFP transceiver, so there is no need of software to configure MAC on host system.

At enhance, the software can configure the

PHY device inner LCP-1250RJ3SR-L via SFP two-wire-inter- face. LCP-1250RJ3SR-L can also be operate on SGMII mode, which provides with tri-speed mode, 10/100/1000 Mbps operation over

1.25 GHz serial interfaces, as long as the host

z 10/100/1000 BASE-T operation in the host

system with SGMII interface (To be configured)

z Compliant with industry standard RFT electrical

connector and cage

z EEPROM with serial ID functionality

z LCP-1250RJ3SR-L supports RX_LOS enabled

z Internal PHY IC is configurable by host system

software via SFP 2-wire-interface

Applications

z Gigabit Ethernet over copper

z Switch to Switch interface

z Switched backplane applications

z File server interface

Performance

z LCP-1250RJ3SR-L data link up to 100m on

standard CAT 5 UTP

DELTA ELECTRONICS, INC.

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Oct. 2007 Rev. 1.02

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Product Selection

LCP-1250RJ3SR-L

Part Number Link Indictor On RX_LOS

Pin Auto-negotiation on MAC side Enabled by default

MAC side Interface Auto-negotiation on

copper side Enabled by default

Speed Mode (default)

LCP-1250RJ3SR

*note1

N/A Available N/A

1000Base-X Yes SGMII

1.25Gbps SerDes 1.25Gbps SerDes SGMII without clock

1000Base-T 1000Base-T 1000Base-T

1000Mbps only 1000Mbps only 10/100/1000Mbps

LCP-1250RJ3SR-L

*note2

LCP-1250RJ3SR-S

*note3

Notes:

1. This part supports the 1000 Base-T with SerDes interface by default. It can operate in 10/100/1000

Base-T with SGMII interface by reconfiguration of the PHYwithin the SFP.

2. This part uses the SFP’s Rx-Los pin for link indication and 1000 Base-T auto-negotiation should be

disabling on the host system. It can operate in 10/100/1000 Base-T with SGMII interface by

reconfiguration of the PHY within the SFP.

3. This part supports the 10/100/1000 Base-T with SGMII interface by default.

Serial Interface Configuration (PHY Two-Wire Address 0xAC)

MODE

R/W Changes to these bits are disruptive to the normal

operation; hence, any changes to these registers must be followed by software reset to take effect. Upon hardware reset Register 27.3:0 defaults to the value in HWCFG_MODE[3:0]. 0100 = SGMII without Clock with SGMII Auto-Neg to copper 1000 = 1000BASE-X without Clock with 1000BASE-X Auto-Neg to copper (GBIC) 1100 = 1000BASE-X without Clock without 1000BASEX Auto-Neg to copper

Absolute Maximum Ratings

Parameter Symbol Min. Typ. Max. Unit Note Storage Temperature Ts Supply Voltage VCC 0 5 V

−40

85 ºC

Recommended Operating Conditions

Parameter Symbol Min. Typ. Max. Unit Note Ambient Operating Temperature TA 0 70 ºC Supply Voltage VCC 3.135 3.465 V

DELTA ELECTRONICS, INC.

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Electrical Characteristics

(TA=0 ºC to 70 ºC, VCC=3.135V to 3.465V)

Parameter Symbol Min. Typ. Max. Unit Note Supply Current ICC 350 400 mA

Transmitter

Transmitter Differential Input Voltage V Differential Input Impedance ZTX 80 100 120 Ohm Transmitter Disable Input-High V Transmitter Disable Input-Low V

Receiver

Data Output Differential Voltage V Differential Output Impedance ZRX 80 100 120 Ohm Data Output Rise/Fall Time t LOS Output Voltage-High V LOS Output Voltage-Low V

Notes:

1. Internally AC coupled and terminated to 100-Ohm differential load.

LCP-1250RJ3SR-L

0.5 2.4 V 1

D,TX

2.0 VCC+0.3 V

DISH

0 0.8 V

DISL

0.35 2 V 3

D,RX

/ t

r,R x

f,Rx

2.0 VCC +0.3 V 2

SDHL

0 0.8 V 2

SDL

180 ps 4

2. Pull up to V

with a 4.7K – 10K Ohm resistor on host Board

3. Internally AC coupled, but requires a 100-Ohm differential termination at MAC side.

4. These are unfiltered 20%~80% values

SFP Transceiver Electrical Pad Layout

DELTA ELECTRONICS, INC.

Oct. 2007 Rev. 1.02

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