LMC7532

更新时间： 2024-09-18 04:19:59

品牌	Logo	应用领域
美国国家半导体 - NSC		驱动器
页数	文件大小	规格书
2页	31K
描述
Low EMI, Low Power XGA/SVGA TFT-LCD Column Driver

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数据手册

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LMC7532 数据手册

ADVANCED INFORMATION

NOV, 1997

LMC7532

Low EMI, Low Power XGA/SVGA TFT-LCD Column Driver

General description

Feature

The LMC7532 is a Column Driver suitable for Nation-

al’s Reduced Swing Differential Signalling (RSDS)

digital interface. It converts this 18-bit digital data into

analog voltage for 300 or 309 columns, charging each

sub-pixel to the correct gray level corresponding to the

digital value.

The RSDS path to the panel timing controller contrib-

utes toward lowering radiated EMI, reducing system

power consumption and eliminates one of the two pix-

el busses used in typical XGA TFT-LCD panels today.

This single 9-bit differential bus conveys the 18-bit

color data for XGA panels at 130Mb/s when using

VESA 60 Hz standard timing.

■ Reduced Swing Differential Signalling (RSDS)™

digital bus reduces power, EMI and width from tim-

ing controller.

■ Selectable 300/309 outputs provides ability to

drive SVGA and XGA TFT-LCD systems.

■ Switched reference type DAC gives high accuracy

with low reference current requirements.

■ Clock Frequency up to:

■ Typical Accuracy:

■ Narrow bus.

65MHZ

+/-5 mV

■ 64 gray scales.

■ Receive RSDS @ 130Mb/s width @ 65MHz clock

from FPD 63310.

With the addition of a single National DS90CF364 or

‘564 FPD-Link™ chip, and the FPD63310 Universal

Interface XGA/SVGA Timing controller, the entire data

path is optimized for reduced EMI, power consump-

tion and width.

System Diagram

Gray Scale Voltage Reference BUS

Gray scale

Reference

Line Transfer Signal

/9 + CLK, RSDS BUS

Start Pulse

LMC7532

Inversion

Control

/2 Link1

/2 Link2

/2 Link3

FPD63310

XGA Panel

Timing

Controller

/2 LinkC

1024 X 768 or 800 X 600

TFT-LCD Array

VDD

VSS

Panel

Power

Supply

NM93CSxxL

Serial EEPROM

FIGURE 1. Block diagram of the LCD module

FPD-Link™ is a trademark of National Semiconductor

http://www.national.com

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