MAX3741 Datasheet, PDF (1/10 Pages) Maxim Integrated Products – 3.2Gbps Compact SFP VCSEL Driver

19-2597; Rev 1; 5/04
3.2Gbps Compact SFP VCSEL Driver
General Description
The MAX3741 is a high-speed VCSEL driver for small-
form-factor (SFF) and small-form-factor pluggable (SFP)
fiber-optic LAN transmitters. It contains a bias generator,
laser modulator, and peaking current option to improve
VCSEL edge speed. The driver accommodates common
cathode and differential configurations.
The MAX3741 operates up to 3.2Gbps. It can switch up
to 15mA of laser modulation current and source up to
15mA of bias current. The MAX3741 is designed to inter-
face with a digital potentiometer and control circuitry.
The MAX3741 accommodates various VCSEL packages,
including low-cost TO-46 headers.
The MAX3741 is available in a compact 3mm x 3mm
16-pin thin QFN package and operates over a tempera-
ture range of -40°C to +85°C.
Applications
Multirate (1Gbps to 3.2Gbps) SFP/SFF Modules
Gigabit Ethernet Optical Transmitters
Fibre Channel Optical Transmitters
Features
o 2mA to 15mA Modulation Current
o 1mA to 15mA Bias Current
o Optional Peaking Current to Improve VCSEL Edge
Speed
o Supports Common Cathode and Differential
Configuration
o 3mm × 3mm 16-Pin Thin QFN Package
Ordering Information
PART
TEMP
RANGE
PIN-
PACKAGE
PKG.
CODE
MAX3741ETE -40°C to +85°C 16 Thin QFN T1633F-3
Typical Application Circuit
+3.3V
Pin Configuration
0.01µF
0.1µF
IN+
IN-
0.1µF
V_CC
BIAS
MAX3741
0.01µF
OUT+
0.01µF
OUT-
TX_DISABLE
BIASMON
BIASSET MODSET GND PEAKSET
L1*
50Ω
R_BIASSET
R_MODSET
R_PEAKSET
R_MON
TOP VIEW
16 15 14 13
TX_DISABLE 1
IN+ 2
IN- 3
N.C. 4
MAX3741
3mm x 3mm
5
6
7
8
12 BIASMON
11 OUT+
10 OUT-
9 VCC
THIS SYMBOL REPRESENTS A TRANSMISSION LINE OF
CHARACTERISTIC IMPEDANCE Zo = 50Ω.
* FERRITE BEAD, MURATA BLM18HD102SN1B
THIN QFN
EXPOSED PAD IS CONNECTED TO GND.
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.