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LM8300ILQ9 PDF预览

LM8300ILQ9

更新时间: 2024-11-26 22:47:03
品牌 Logo 应用领域
美国国家半导体 - NSC 控制器
页数 文件大小 规格书
20页 324K
描述
Four Wire Resistive Touchscreen Controller with Brownout

LM8300ILQ9 数据手册

 浏览型号LM8300ILQ9的Datasheet PDF文件第2页浏览型号LM8300ILQ9的Datasheet PDF文件第3页浏览型号LM8300ILQ9的Datasheet PDF文件第4页浏览型号LM8300ILQ9的Datasheet PDF文件第5页浏览型号LM8300ILQ9的Datasheet PDF文件第6页浏览型号LM8300ILQ9的Datasheet PDF文件第7页 
PRELIMINARY  
December 2003  
LM8300/LM8500  
Four Wire Resistive Touchscreen Controller with  
Brownout  
self-power down mode, the current drawn is typically less  
1.0 General Description  
than 2 µA. The device resumes normal operation when a  
touch is detected on the touch screen or communication is  
detected on the UART. In addition to the self-power down  
mode, the controller can be disabled by pulling the SHUT-  
DOWN pin low. The controller resumes normal operation  
when the SHUTDOWN pin is tristated or pulled high.  
The LM8300/8500 is a 4-wire resistive touch screen control-  
ler. The controller samples and drives the touch screen  
without the need of any external hardware. The built in 10-bit  
A/D provides a maximum of 500 coordinate pairs per second  
(cpps). The data sampled from the touch screen is sent out  
on the UART at a speed of 38400 bps.  
The controller has an internal non-volatile memory storage  
element to store configuration data such as calibration points  
or controller configurations.  
The controller has a power-saving mode which causes the  
controller to self-power down when no touch is detected on  
the touch screen for a specified amount of time. In the  
Devices included in this datasheet:  
Operating  
Voltage  
Brownout  
Voltage  
Operating  
Frequency  
I/O  
Pins  
Device  
LM8300  
LM8500  
Packages  
Temperature  
0˚C to +70˚C  
0˚C to +70˚C  
44 LLP, 44 PLCC,  
48 TSSOP  
3, 5 V  
5 V  
2.7 to 2.9 V  
3.27 MHz  
18  
44 LLP, 44 PLCC,  
48 TSSOP  
4.17V to 4.5V 3.27, 10 MHz  
18  
n Controller configurations are stored in the internal  
non-volatile storage element  
n Touch pressure can be measured  
2.0 Features  
KEY FEATURES  
n Supports 4 wire resistive touch panels  
n Low power standby current typically less than 2 µA at  
5.5V  
n Maximum speed of 500 coordinate pairs per second  
n Automatic wake up and return to standby  
n 10 bit A/D  
n On-chip touch screen current drivers - no external driver  
required  
n UART interface  
APPLICATIONS  
n Personal Digital Assistants  
n Smart Hand-Held Devices  
n Touch Screen Monitors  
n Point-of-Sales Terminals  
n KIOSK  
n Pagers  
n Cell Phones  
COP8 is a trademark of National Semiconductor Corporation.  
© 2004 National Semiconductor Corporation  
DS200372  
www.national.com  

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