Datasheet > LM1238AAC/NA

LM1238AAC/NA

更新时间： 2024-11-04 22:05:11

品牌	Logo	应用领域
美国国家半导体 - NSC		放大器
页数	文件大小	规格书
24页	1203K
描述
110 MHz I2C Compatible RGB Preamplifier with Internal Simple OSD Generator and 4 DACs

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技术参数
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LM1238AAC/NA 技术参数

是否无铅：	含铅	是否Rohs认证：	不符合
生命周期：	Obsolete	包装说明：	DIP, DIP24,.3
Reach Compliance Code：	unknown	ECCN代码：	EAR99
HTS代码：	8542.33.00.01	风险等级：	5.92
标称带宽：	110000 kHz	商用集成电路类型：	VIDEO PREAMPLIFIER
JESD-30 代码：	R-PDIP-T24	JESD-609代码：	e0
长度：	32.005 mm	信道数量：	3
功能数量：	1	端子数量：	24
最高工作温度：	70 °C	最低工作温度：
封装主体材料：	PLASTIC/EPOXY	封装代码：	DIP
封装等效代码：	DIP24,.3	封装形状：	RECTANGULAR
封装形式：	IN-LINE	峰值回流温度（摄氏度）：	NOT SPECIFIED
电源：	5 V	认证状态：	Not Qualified
座面最大高度：	4.572 mm	子类别：	Audio/Video Amplifiers
最大压摆率：	245 mA	最大供电电压 (Vsup)：	5.25 V
最小供电电压 (Vsup)：	4.75 V	表面贴装：	NO
技术：	CMOS	温度等级：	COMMERCIAL
端子面层：	Tin/Lead (Sn/Pb)	端子形式：	THROUGH-HOLE
端子节距：	2.54 mm	端子位置：	DUAL
处于峰值回流温度下的最长时间：	NOT SPECIFIED	宽度：	7.62 mm
Base Number Matches：	1

LM1238AAC/NA 数据手册

June 2003

LM1238

110 MHz I²C Compatible RGB Preamplifier with Internal

Simple OSD Generator and 4 DACs

n OSD override allows OSD messages to be displayed

while blanking input video

General Description

The LM1238 pre-amp is an integrated, three channel video

n Internally generated burn-in screen

pre-amp. It has an I2C compatible interface which allows

n 4 DAC outputs (8-bit resolution) for bus controlled CRT

control of all the parameters necessary to directly setup and

bias and brightness

adjust the gain and contrast in the CRT display. Four I2C

compatible DACs are available to control monitor bias and

brightness circuits. The LM1238 preamp is designed to be

100% compatible with the LM246x high gain driver family

and the LM2479/80 Clamp ICs.

n Spot killer which blanks the video outputs when V_CC

falls below the specified threshold

n Suitable for use with discrete or integrated clamp, with

software configurable brightness mixer

n H and V blanking (V blanking is optional and has

n Power Saving Mode with 65% power reduction

n Matched to LM246x driver and 2479/80 clamp

Black level clamping of the video signal is carried out directly

on the AC coupled input signal into the high impedance

pre-amplifier inputs, eliminating the need for additional

clamp capacitors. Horizontal and vertical blanking of the

outputs is provided. Vertical blanking is optional and its

duration is register programmable.

Applications

n Low end 15" and 17" bus controlled monitors with OSD

n 1024x768 displays up to 85 Hz requiring OSD capability

n Very low cost systems with LM246x driver

Features

n I²C compatible microcontroller interface

n Internal OSD generator with 16 sets of color icons

Block and Connection Diagram

20038701

FIGURE 1. Order Number LM1238AAC/NA

See NS Package Number N24D

DS200387

www.national.com

12 3 4 5 6 7...24

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与LM1238AAC/NA相关器件

型号	品牌	获取价格	描述	数据表
LM1238AAD/NA	NSC	获取价格	IC,VIDEO AMPLIFIER,TRIPLE,CMOS,DIP,24PIN,PLASTIC
LM1238AAD/NA/NOPB	NSC	获取价格	IC,VIDEO AMPLIFIER,TRIPLE,CMOS,DIP,24PIN,PLASTIC
LM1238AAF/NA	ETC	获取价格	VIDEO AMPLIFIER\|TRIPLE\|CMOS\|DIP\|24PIN\|PLASTIC
LM123AK-05	ETC	获取价格	Voltage Regulator
LM123AK-05-883B	ETC	获取价格	Voltage Regulator
LM123AK-12	ETC	获取价格	Voltage Regulator
LM123AK-12-883B	ETC	获取价格	Voltage Regulator
LM123AK-15	ETC	获取价格	Voltage Regulator
LM123AK-15-883B	ETC	获取价格	Voltage Regulator
LM123AKSTEEL	NSC	获取价格	5V FIXED POSITIVE REGULATOR, MBFM2, HERMETIC SEALED, METAL CAN, TO-3, 2 PIN

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