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LM2457TA

更新时间： 2024-11-10 20:55:31
品牌 Logo 应用领域
美国国家半导体 - NSC 局域网放大器商用集成电路
页数 文件大小 规格书
14页 823K
描述
IC 3 CHANNEL, VIDEO AMPLIFIER, PZFM15, TO-220, 15 PIN, Audio/Video Amplifier

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中文翻译

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LM2457TA 技术参数

是否Rohs认证： 不符合生命周期：Obsolete
包装说明：ZIP, ZIP15,.2,.17TBReach Compliance Code：unknown
ECCN代码：EAR99HTS代码：8542.33.00.01
风险等级：5.89商用集成电路类型：VIDEO AMPLIFIER
JESD-30 代码：R-PZFM-T15JESD-609代码：e0
信道数量：3功能数量：1
端子数量：15封装主体材料：PLASTIC/EPOXY
封装代码：ZIP封装等效代码：ZIP15,.2,.17TB
封装形状：RECTANGULAR封装形式：FLANGE MOUNT
峰值回流温度（摄氏度）：NOT SPECIFIED电源：80 V
认证状态：Not Qualified子类别：Audio/Video Amplifiers
最大供电电压 (Vsup)：85 V最小供电电压 (Vsup)：60 V
表面贴装：NO端子面层：Tin/Lead (Sn/Pb)
端子形式：THROUGH-HOLE端子节距：1.27 mm
端子位置：ZIG-ZAG处于峰值回流温度下的最长时间：NOT SPECIFIED
Base Number Matches：1

LM2457TA 数据手册

 浏览型号LM2457TA的Datasheet PDF文件第2页浏览型号LM2457TA的Datasheet PDF文件第3页浏览型号LM2457TA的Datasheet PDF文件第4页浏览型号LM2457TA的Datasheet PDF文件第5页浏览型号LM2457TA的Datasheet PDF文件第6页浏览型号LM2457TA的Datasheet PDF文件第7页 
October 2000  
LM2457  
Monolithic Triple 7.5nS CRT Driver With Integrated  
Clamp and G1 Blanking  
The output of the G1 driver can also be used to drive a  
voltage boost capacitor (22uF). When connected between  
the G1 drive output and the 120v supply input pin, a 120v  
boost supply is achieved which can be used to drive the  
internal DC clamp circuit, thereby eliminating the require-  
ment for a 120V clamp supply.  
General Description  
The LM2457 driver is an integrated high voltage triple CRT  
driver circuit designed for use in color monitor applications.  
The input signal interface to the IC is a multiplexed signal  
containing both clamp and video signal information, relative  
to an external 1.7 VDC reference.  
The IC is packaged in an industry standard 15 lead TO-220  
molded plastic power package.  
The IC contains three high gain, differential input, high input  
impedance, wide band amplifiers which directly drive the  
RGB cathodes of a CRT. Each channel has its gain internally  
set to -52 and can drive CRT capacitive loads as well as  
resistive loads present in other applications, limited only by  
the package’s power dissipation.  
Features  
n 7.5ns low power driver  
n Three integrated active clamp circuits  
n Integrated 120V supply and G1 vertical blank drive  
circuit  
n Multiplexed signal interface to LM125X OSD Pre-amp  
minimizes pin count while increasing functionality  
n External System voltage reference  
n Convenient TO-220 staggered lead package  
Integrated with the driver is a triple video clamp circuit for DC  
recovery of each of the AC coupled video outputs. The DC  
clamp circuit amplifies the clamp signal that is multiplexed on  
the video signal input. The DC clamp amplifiers are high  
gain, differential input, high input impedance amplifiers, set-  
ting a low impedance DC level at the clamp output which can  
be used to restore the DC level of the cathode drive. Each  
channel has a gain that is internally set to +75.  
Recommended Applications  
n 1024 x 768 Resolution displays up to 85Hz refresh  
n Pixel clock frequencies up to 95MHz  
Also integrated within the package is a 43Vp-p vertical blank-  
ing driver that is designed to drive the vertical retrace blank-  
ing signal to the G1. This is a current limited, low impedance  
output capable of driving normal G1 decoupling capaci-  
tances via an external resistor.  
n Monitor requiring horizontal video blanking  
Block Diagram  
Package Pinout  
DS101379-1  
FIGURE 1. LM2457 Block Diagram  
DS101379-2  
FIGURE 2. LM2457 Package Pinout  
Order Number LM2457TA  
© 2000 National Semiconductor Corporation  
DS101379  
www.national.com  
1234567...14

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