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LMH4045 PDF预览

LMH4045

更新时间: 2024-11-09 04:19:59
品牌 Logo 应用领域
美国国家半导体 - NSC /
页数 文件大小 规格书
6页 166K
描述
3 Gbps, HD, SD, DVB-ASI SDI Dual Serializer / Deserializer (SER/DES) with Loopthrough and LVDS Interface

LMH4045 数据手册

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ADVANCE INFORMATION  
September 4, 2008  
LMH4345, LMH4045, LMH4075  
3 Gbps, HD, SD, DVB-ASI SDI Dual Serializer / Deserializer  
(SER/DES) with Loopthrough and LVDS Interface  
General Description  
Key Specifications  
The Dual SER/DES 5:1 Serializer and 1:5 De-serializer pro-  
vides four independent high-speed Serial Digital Interface  
(SDI) links, two RX and two TX links, compliant with SMPTE  
259M C, SMPTE 292M or SMPTE 424M at datarates of 270  
Mbps, 1.5 Gbps or 3 Gbps as applicable. The channels also  
will support DVB_ASI interfaces, with internal 8b10b coding/  
decoding. Built-in programmable serializer and deserializer  
signal conditioning blocks improve signal integrity perfor-  
mance and allow flexible board layout. The input and output  
of the Dual Serdes are designed to interface easily to FPGA/  
ASIC devices. Each input or output channel is supported by  
5 pairs of high-speed LVDS connections to reduce FPGA pin  
count as well as provide better signal integrity and EMI per-  
formance. The serializer outputs have integrated cable  
drivers which support SMPTE 259M (270 Mb/s), SMPTE  
292M, and SMPTE 424M standards with excellent output jitter  
performance. Each Deserializer channel has a reclocked  
loopthrough output which also has an integrated cable driver.  
When paired with a host FPGA the LMH4345 deserializers  
automatically detect the incoming data rate and decode the  
raw 5-bit data words compliant to any of the supported stan-  
dards. The interface between the LMH4345 and the host  
FPGA consists of four 5-bit wide LVDS buses (two input and  
two output), an LVDS clock per channel and an SMBus inter-  
face. No external VCOs or clocks are required. The LMH4345  
receivers detect the frequency from the incoming data  
stream, generate a clean clock and transmit both clock and  
data to the host FPGA. Refer to table 1 for a listing of the  
variants of this product offered. National Semiconductor also  
offers single serializers and single deserializers as a part of  
the FPGA-Attach SER/DES product family.  
Output compliant with SMPTE 259M-C, SMPTE 292M,  
SMPTE 424M and DVB-ASI  
Typical power dissipation: TBD mW (loopthrough  
disabled, 3G datarate)  
Jitter Tolerance (Deserializer) 0.6UI  
Output Jitter (Serializers) 0.1 UI  
Features  
Two Independent Serializers and Two Independent  
Deserializers  
No external VCO or clocks required  
Reclocked serial loopthrough with Cable Driver  
Integrated Cable Drivers  
Powerdown Mode  
3.3V SMBus configuration interface  
Small 100 Pin TQFP package  
Industrial Temperature range:-40°C to +85°C  
Applications  
SDI interfaces for:  
Video Cameras  
DVRs  
Video Switchers  
Video Editing Systems  
The FPGA-Attach SER/DES product family is supported by a  
suite of IP which allows the design engineer to quickly develop  
video applications using the SER/DES products. The product  
is packaged in a 100 pin TQFP package.  
TRI-STATE® is a registered trademark of National Semiconductor Corporation.  
© 2008 National Semiconductor Corporation  
300682  
www.national.com  

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