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LMH1981

更新时间： 2024-02-11 14:14:38
品牌 Logo 应用领域
美国国家半导体 - NSC /
页数 文件大小 规格书
13页 680K
描述
Multi-Format Video Sync Separator

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中文翻译

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LMH1981 技术参数

是否Rohs认证： 不符合生命周期：Transferred
包装说明：TSSOP-14Reach Compliance Code：not_compliant
风险等级：5.47Is Samacsys：N
商用集成电路类型：SYNC SEPARATOR ICJESD-30 代码：R-PDSO-G14
JESD-609代码：e0长度：5 mm
湿度敏感等级：1功能数量：1
端子数量：14最高工作温度：85 °C
最低工作温度：-40 °C封装主体材料：PLASTIC/EPOXY
封装代码：TSSOP封装等效代码：TSSOP14,.25
封装形状：RECTANGULAR封装形式：SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
峰值回流温度（摄氏度）：NOT SPECIFIED电源：3.3/5 V
认证状态：Not Qualified座面最大高度：1.1 mm
子类别：Other Consumer ICs最大压摆率：13.5 mA
最大供电电压 (Vsup)：5 V最小供电电压 (Vsup)：3.3 V
表面贴装：YES技术：CMOS
温度等级：INDUSTRIAL端子面层：Tin/Lead (Sn85Pb15)
端子形式：GULL WING端子节距：0.65 mm
端子位置：DUAL处于峰值回流温度下的最长时间：NOT SPECIFIED
宽度：4.4 mmBase Number Matches：1

LMH1981 数据手册

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PRELIMINARY  
April 2006  
LMH1981  
Multi-Format Video Sync Separator  
General Description  
Features  
n Standard analog video sync separation for NTSC, PAL,  
SECAM, 480i/p, 576i/p, 720p, 1080i/p, and RGsB from  
composite (CVBS), S-Video (Y/C), component (YPBPR),  
and computer video interfaces  
The LMH1981 is a high performance multi-format sync sepa-  
rator ideal for use in a wide range of video applications, such  
as broadcast and professional video equipment and HDTV/  
DTV systems.  
n Bi-level & tri-level sync compatible  
The input accepts standard analog video signals with either  
bi-level or tri-level sync, and the outputs provide all of the  
critical timing signals in CMOS logic, including composite,  
horizontal, and vertical syncs, burst/back porch timing, odd/  
even field, and video format outputs. The horizontal sync  
output features very low jitter, minimizing external circuitry  
needed to clean and reduce jitter in subsequent sync pro-  
cessing stages.  
n Composite, horizontal, and vertical sync outputs  
n Burst/back porch timing, odd/even field, and video  
format Outputs  
n Superior jitter performance on the H Sync  
negative-going edge reference  
n Automatic video format detection  
n 50% sync slicing of video inputs from 0.5 VPP to 2 VPP  
n Macrovision compatible  
The LMH1981 automatically detects the input video format,  
eliminating the need for programming using a microcontroller  
or external RSET resistor. The sync separator applies precise  
50% sync slicing to ensure accurate sync extraction for  
inputs with irregular amplitude, offset, and noise conditions.  
Its unique video format feature (pin 9) outputs the total  
vertical scan lines per frame as an 11-bit binary serial bit  
stream, which can be decoded by the video system to de-  
termine the input video format and enable dynamic adjust-  
ment of system parameters, i.e.: color space or scaler con-  
versions. The LMH1981 is available in a 14-pin TSSOP  
package and operates over the full commercial temperature  
range.  
n 3.3V to 5V supply operation  
Applications  
n Broadcast and professional video equipment  
n HDTV/DTV systems  
n Genlock systems  
n Video capture & digitization  
n Set-top boxes (STB) & digital video recorders (DVR)  
n Video displays  
Connection Diagram  
Pin Descriptions  
Pin No.  
Pin Name Pin Description  
14-Pin TSSOP  
1
REXT  
Bias Current External Resistor  
2, 5, 10  
GND  
Ground  
3, 6, 11  
VCC  
Supply Voltage  
4
VIN  
Video Input  
7
HSOUT  
VSOUT  
VFOUT  
CSOUT  
BPOUT  
OEOUT  
Horizontal Sync Output  
Vertical Sync Output  
Video Format Output  
Composite Sync Output  
Burst/Back Porch Timing Output  
Odd/Even Field Output  
8
9
12  
13  
14  
20174501  
Top View  
FIGURE 1. Pinout  
Ordering Information  
Package  
Part Number  
LMH1981MT  
LMH1981MTX  
Package Marking  
LMH1981MT  
Transport Media  
94 Units/Rail  
NSC Drawing  
14-Pin TSSOP  
MTC14  
2.5k Units Tape and Reel  
© 2006 National Semiconductor Corporation  
DS201745  
www.national.com  
1234567...13

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