SY84782UMGTR MICREL [Micrel Semiconductor], SY84782UMGTR Datasheet

SY84782UMGTR

Manufacturer Part Number

SY84782UMGTR

Description

Low Power 2.5V 1.25Gbps FP/DFB Laser Diode Driver

Manufacturer

MICREL [Micrel Semiconductor]

Datasheet

1.SY84782UMGTR.pdf (9 pages)

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General Description

The SY84782U is a single 2.5V supply, ultra-low power,

small form factor laser diode driver for telecom/datacom

applications. Intended to drive FP/DFB lasers at data rates

up to 1.25Gbps, it is especially useful for Compact SFP,

SFP and SFF modules where power requirements are

quite stringent. The driver can deliver modulation current

up to 90mA and offers a high compliance voltage, all of

which make the SY84782U suitable for high current

operations in both AC and DC coupled applications.

The SY84782U is intended to be used with Micrel’s

MIC3003 Optical Transceiver Management IC, which

allows for both modulation and bias current control and

monitoring. Furthermore, the MIC3003 offers power control

and temperature compensation.

This device operates across the industrial temperature

range (–40°C to +85°C) and is available in a small 3mm x

3mm QFN package.

All datasheets and support documentation can be found

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

___________________________________________________________________________________________________________

Typical Application

January 2011

Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (

DC-coupled Laser

Features

• 2.5V power supply option

• Ultra low power consumption (63mW typ)

• Multirate up to 1.25Gbps

• Fast rise and fall time

• Modulation current up to 90mA

• Laser may be DC or AC coupled

• Guaranteed operation over –40°C to +85°C

• Small form factor 16-pin (3mm x 3mm) QFN package

• MIC3003G Compatible

Applications

• Multirate LAN, MAN applications: Fibre Channel, GbE,

• CSFP/SFF/SFP Optical Modules

408

Low Power 2.5V 1.25Gbps FP/DFB Laser

temperature range

SONET OC3/12/24 and SDH STM1/4/8

) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

SY84782U

Diode Driver

hbwhelp@micrel.com

AC-coupled Laser

or (408) 955-1690

M9999-012411-A

Related parts for SY84782UMGTR

SY84782UMGTR Summary of contents

Page 1

... Furthermore, the MIC3003 offers power control and temperature compensation. This device operates across the industrial temperature range (–40°C to +85°C) and is available in a small 3mm x 3mm QFN package. All datasheets and support documentation can be found on Micrel’s web site at: www.micrel.com. ___________________________________________________________________________________________________________ Typical Application DC-coupled Laser Micrel Inc. • ...

Page 2

Micrel, Inc. Functional Block Diagram Ordering Information Part Number SY84782UMG SY84782UMG TR (1) Note: 1. Tape and Reel Pin Configuration January 2011 Package Operating Type Range QFN-16 Industrial QFN-16 Industrial 16-Pin QFN 2 Package Marking Finish 782U Pb-Free Pb-Free bar-line ...

Page 3

Micrel, Inc. Pin Description Pin Number Pin Name GND, Exposed Pad 2 DIN+ 3 DIN VCC 9, 10 MOD- 11, 12 MOD+ 14 VREF 15 IM_SET 16 /EN Truth Table DIN+ DIN- L ...

Page 4

Micrel, Inc. Absolute Maximum Ratings Supply Voltage (V ) .................................. –0.5V to +3.0V CC Input Voltage (V ) .......................................... –0. TTL Control Input Voltage (V ) ........................... Lead Temperature (soldering, 20 sec.).................... +260°C ...

Page 5

Micrel, Inc. Typical Operating Characteristics V = 2.5V ±5 –40°C to +85°C. Typical values are IM_SET vs Modulation Current 100 200 400 600 800 ...

Page 6

Micrel, Inc. Input and Output Stages Figure 1a. Simplified Input Stage January 2011 Figure 1b. Simplified Output Stage 6 hbwhelp@micrel.com SY84782U M9999-012411-A or (408) 955-1690 ...

Page 7

Micrel, Inc. Application Information The typical applications diagram on the first page shows how to connect the driver to the laser single-ended. To improve transition time and laser response, the laser can be driven differentially, as shown in Figures 2 ...

Page 8

Micrel, Inc. between the first bit and the last bit of a long string of identical bits in a low data rate application. This leads to higher pattern-dependent jitter in the transmitter signal. 0.1µF is found to be good for ...

Page 9

Micrel, Inc. Package Information MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB Micrel makes no representations or warranties with respect to the accuracy or completeness of the information furnished ...

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