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MAX3946ETG+

更新时间： 2024-02-04 23:54:38
品牌 Logo 应用领域
美信 - MAXIM 驱动器电信集成电路电信电路PC
页数 文件大小 规格书
28页 2198K
描述
1.0625Gbps to 11.3Gbps, SFP+ Laser Driver with Laser Impedance Mismatch Tolerance

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MAX3946ETG+ 技术参数

是否无铅： 不含铅是否Rohs认证： 符合
生命周期：Active包装说明：HVQCCN,
Reach Compliance Code：compliantHTS代码：8542.39.00.01
风险等级：1.63JESD-30 代码：S-XQCC-N24
长度：4 mm湿度敏感等级：1
功能数量：1端子数量：24
最高工作温度：95 °C最低工作温度：-40 °C
封装主体材料：UNSPECIFIED封装代码：HVQCCN
封装形状：SQUARE封装形式：CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
峰值回流温度（摄氏度）：NOT SPECIFIED座面最大高度：0.8 mm
标称供电电压：3.3 V表面贴装：YES
技术：BIPOLAR电信集成电路类型：TELECOM CIRCUIT
温度等级：INDUSTRIAL端子形式：NO LEAD
端子节距：0.5 mm端子位置：QUAD
处于峰值回流温度下的最长时间：NOT SPECIFIED宽度：4 mm
Base Number Matches：1

MAX3946ETG+ 数据手册

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19-5182; Rev 0; 3/10  
1.0625Gbps to 11.3Gbps, SFP+ Laser Driver  
with Laser Impedance Mismatch Tolerance  
General Description  
Features  
S 225mW Power Dissipation Enables < 1W SFP+  
The MAX3946 is a +3.3V, multirate, low-power laser  
diode driver designed for Ethernet and Fibre Channel  
transmission systems at data rates up to 11.3Gbps.  
This device is optimized to drive a differential transmit-  
ter optical subassembly (TOSA) with a 25I flex circuit.  
The unique design of the output stage enables use of  
unmatched TOSAs, greatly reducing headroom limita-  
tions and lowering power consumption.  
Modules  
S Up to 100mW Power Consumption Reduction by  
Enabling the Use of Unmatched FP/DFB TOSAs  
S Supports SFF-8431 SFP+ MSA and SFF-8472  
Digital Diagnostic  
S 225mW Power Dissipation at 3.3V (I  
MOD  
= 40mA,  
I
= 60mA Assuming 25I TOSA)  
BIAS  
The device receives differential CML-compatible signals  
with on-chip line termination. It can deliver laser modula-  
tion current of up to 80mA, at an edge speed of 20ps  
(20% to 80%), into a 5Ito 25Iexternal differential load.  
The device is designed to have a symmetrical output  
stage with on-chip back terminations integrated into  
its outputs. A high-bandwidth, fully differential signal  
path is implemented to minimize deterministic jitter. An  
equalization block can be activated to compensate for  
the SFP+ connector. The integrated bias circuit provides  
programmable laser bias current up to 80mA. Both the  
laser bias generator and the laser modulator can be dis-  
abled from a single pin, DISABLE.  
S Single +3.3V Power Supply  
S Up to 11.3Gbps (NRZ) Operation  
S Programmable Modulation Current from 10mA to  
100mA (5I Load)  
S Programmable Bias Current from 5mA to 80mA  
S Programmable Input Equalization  
S Programmable Output Deemphasis  
S 25I Output Back Termination at TOUT+ and  
TOUT-  
S DJ Performance 7ps  
P-P  
with Mismatched  
Differential Load (5I)  
A 3-wire digital interface reduces the pin count and  
permits adjustment of input equalization, pulse-width  
adjustment, Tx polarity, Tx deemphasis, modulation cur-  
rent, and bias current without the need for external com-  
ponents. The MAX3946 is available in a 4mm x 4mm,  
24-pin TQFN package.  
S DJ Performance 5ps  
with Mismatched  
P-P  
Differential Load (25I)  
S DJ Performance 5ps  
with 50I Differential Load  
P-P  
S Programmable Pulse Width  
S Edge Transition Times of 20ps  
S Bias Current Monitor  
Applications  
4x/8x FC SFP+ Optical Transceivers  
10GFC SFP+ Optical Transceivers  
S Integrated Eye Safety Features  
S 3-Wire Digital Interface  
10GBASE-LR SFP+ Optical Transceivers  
10GBASE-LRM SFP+ Optical Transceivers  
OC192-SR XFP/SFP+ Transceivers  
S -40°C to +95°C Operation  
Ordering Information  
PART  
TEMP RANGE  
PIN-PACKAGE  
MAX3946ETG+  
-40°C to +85°C  
24 TQFN-EP*  
Note: Parts are guaranteed by design and characterization to  
operate over the -40°C to +95°C ambient temperature range  
(T ) and are tested up to +85°C.  
A
+Denotes a lead(Pb)-free/RoHS-compliant package.  
*EP = Exposed pad.  
_______________________________________________________________ Maxim Integrated Products  
1
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.  
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