参数资料
型号: MAX3740AETG+T
厂商: Maxim Integrated
文件页数: 1/15页
文件大小: 0K
描述: IC DRIVER SFP VCSEL 24-TQFN
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 2,500
类型: 激光二极管驱动器
数据速率: 3.2Gbps
通道数: 1
电源电压: 2.97 V ~ 3.63 V
电流 - 电源: 55mA
电流 - 调制: 15mA
电流 - 偏置: 15mA
工作温度: -40°C ~ 85°C
封装/外壳: 24-WFQFN 裸露焊盘
供应商设备封装: 24-TQFN-EP(4x4)
包装: 带卷 (TR)
安装类型: 表面贴装
19-3118; Rev 3; 1/10
3.2Gbps SFP VCSEL Driver with Diagnostic
Monitors
General Description
The MAX3740A 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 genera-
tor, a laser modulator, and comprehensive safety fea-
tures. The automatic power control (APC) adjusts the
laser bias current to maintain average optical power
over changes in temperature and laser properties. The
driver accommodates common cathode and differential
configurations.
The MAX3740A operates up to 3.2Gbps. It can switch
up to 15mA of laser modulation current and source up
to 15mA of bias current. Adjustable temperature com-
pensation is provided to keep the optical extinction
ratio within specifications over the operating tempera-
ture range. The MAX3740A interfaces with the Dallas
DS1858 to meet SFF-8472 timing and diagnostic
requirements. The MAX3740A accommodates various
VCSEL packages, including low-cost TO-46 headers.
Features
? Supports all SFF-8472 Digital Diagnostics
? 2mA to 15mA Modulation Current
? 1mA to 15mA Bias Current
? Optional Peaking Current to Improve VCSEL Edge
Speed
? Supports Common Cathode and Differential
Configuration
? Automatic Power Control
? Safety Circuits Compliant with SFF and SFP
MSAs
? 4mm ? 4mm, 24-Pin Thin QFN Package
Ordering Information
The MAX3740A safety circuit detects faults that could
cause hazardous light levels and disables the VCSEL
output. The safety circuits are compliant with SFF and
SFP multisource agreements (MSA).
PART
MAX3740AETG
MAX3740AETG +
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
24 Thin QFN-EP*
24 Thin QFN-EP*
The MAX3740A is available in a compact 4mm ? 4mm,
24-pin thin QFN package and operates over the -40°C
to +85°C temperature range.
Applications
Multirate (1Gbps to 3.2Gbps) SFP/SFF Modules
+ Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
Typical Application Circuit
+3.3V
Gigabit Ethernet Optical Transmitters
Fibre Channel Optical Transmitters
V CC
FAULT
4.7k Ω ?
Infiniband Optical Transmitters
TX_DISABLE
PWRMON
MODSET
R MODSET
SQUELCH
0.1 μ F
MAX3740A
REF
IN+
IN-
COMP
MD
0.047 μ F
R PWRSET
0.1 μ F
R TC?
TC1
TC2
BIASSET
BIAS
OUT+
0.01 μ F
C F?
L1*
R BIASSET
GND PEAKSET
OUT-
BIASMON
0.01 μ F
50 Ω
R F?
R PEAKSET ?
? OPTIONAL COMPONENT
*FERRITE BEAD
R BIASMON
________________________________________________________________ Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
1
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