Microchip SY84113BU Manual

Microchip Ikke kategoriseret SY84113BU

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Side 1/10

SFP Module Reference Design

SFP_SY84782U_R0

Preliminary

Micrel Inc. • 2180 Fortune Drive • Jose, CA 95131 • USA • tel +1 (408) 944 0800 • fax + 1 (408) 474 1000 • San - - http://www.micrel.com

March 19, 2015

Preliminary

General Description

This evaluation board is a complete SFP module as

dened in the SFP MSA document. The design uses

Micrel’s MIC3003 controller, the 1 G DFB/FP laser .25

driver SY84782U, and any of the SY84113U iting lim

amplier A picture of the fully loaded board is shown on .

the next page.

Datasheets and support documentation are available on

Micrel’s web site at: . www.micrel.com

Related Support Documentation

 MIC3003 datasheet: Fibre optic module controller

featuring digital diagnostic monitoring interface, as per

SFF-8472/SFF-8432, with internal/external calibration

and full laser control with bias and modulation current

compensation for temperature variations using lookup

tables.

 84782U datasheet. SY .

 SY84113U datasheet. . .

 MIC3003 software user’s guide.

Features

 Compliant with SFP MSA

 Allows for easy and fast evaluation of Micrel’s chipset

for low power SFP module

 Multi-rate operation up to 1.25Gbps

 Single, power supply: 2.5V or 3.3V

 Extended temperature range: -40°C to +9 5°C

Transmitter FP/DFP Laser Diode Driver –

 Operates from a single 2.5V or 3.3V supply

 Modulation current up to 80mA

 C be DC or AC coupled to the laser an

 Small form factor 3mm x 3mm QFN package

Receiver Limiting Post Amplier –

 Wide dierential input range (5mVPP 1800to mVPP)

 Wide SD de-assert or LOS assert threshold range

3mVPP to 30mVPP with 4dB typical electrical hysteresis

 Fast SD / LOS assert/de-assert time

 Available in a tiny 3mm x 3mm QFN package

Controller

 Extensive temperature range

 Alarms and warnings interrupt and TXFAULT masks

 Capability to support up to four chips on the serial

interface

 Integrated digital temperature sensor

 Temperature compensation of modulation, bias, and

fault levels via NVRAM lookup tables

 User-writeable EEPROM scratchpad

 Option to be used with Cisco security chip

 Diagnostic monitoring interface per SFF-8472/8432

 Space saving 3mmx3mm package available

(MIC3003GFL)

Micrel, Inc.

SFP_SY84782U Reference Design

March , 2015 17

Preliminary

Evaluation Board

TOSA

SY84113U ROSA

Top Side

MIC3003 Boom Side

SY84782U

Evaluation Board Setup

TOSA and ROSA Installation

Check the pin conguration of the TOSA and ROSA and

install them according to the diagrams shown in Figure 1.

Driver Laser Coupling

The laser is AC-coupled to the driver. Compensation for

laser parasitics can be improved by choosing appropriate

values for R6 and C15 (or R6 and C7) T. he laser’s

response can be improved by tuning, in addition to

R6/C15, R2 and R4/R13/L3. The optimal values of /R3/L2

these components depend on the length of the laser leads

and can vary from one family of lasers to another. It’s up to

the user to tune the values in order to achieve the best

compensation for the laser used with this board.

Receiver Sensitivity and Hysteresis Setting

The limiting amplier has a receive signal LOS/SD

indicator. The LOS/SD sensitivity is set by the voltage at

SD/LOSLVL (pin ) adjusted by the value of R , which 14 16

forms a voltage divider with the 2.8k internal resistor Ω

terminated to VCC-1.3V.

TOSA Anode (Top)

TOSA PD Anode (Top)

TOSA Cathode (Top)

ROSA VOUT+ (Top)

ROSA GND (Top)

ROSA VOUT- (Top)

TOSA GND (Bottom)

ROSA RSSI (Bottom)

ROSA VDD (Bottom)

Figure 1 Mounting of TOSA and ROSA .

Produkt Specifikationer

Mærke:	Microchip
Kategori:	Ikke kategoriseret
Model:	SY84113BU

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