LM8500 datasheet(1/20 Pages) NSC

tên linh kiện	LM8500

Giải thích chi tiết về linh kiện	Four Wire Resistive Touchscreen Controller with Brownout

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LM8300/LM8500

Four Wire Resistive Touchscreen Controller with

Brownout

1.0 General Description

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 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

self-power down mode, the current drawn is typically less

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 controller has an internal non-volatile memory storage

element to store configuration data such as calibration points

or controller configurations.

Devices included in this datasheet:

Device

Operating

Voltage

Brownout

Voltage

Operating

Frequency

I/O

Pins

Packages

Temperature

LM8300

3, 5 V

2.7 to 2.9 V

3.27 MHz

18

44 LLP, 44 PLCC,

48 TSSOP

0˚C to +70˚C

LM8500

5 V

4.17V to 4.5V

3.27, 10 MHz

18

44 LLP, 44 PLCC,

48 TSSOP

0˚C to +70˚C

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

n

Controller configurations are stored in the internal

non-volatile storage element

n

Touch pressure can be measured

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.

PRELIMINARY

December 2003

DS200372

www.national.com

Số phần tương tự - LM8500

nhà sản xuất	tên linh kiện	bảng dữ liệu	Giải thích chi tiết về linh kiện
National Semiconductor ...	LM8500	319Kb / 20P	Four Wire Resistive Touchscreen Controller with Brownout
Texas Instruments	LM8500IMT9B/NOPB	440Kb / 26P	LM8300/LM8500 Four Wire Resistive Touchscreen Controller with Brownout

More results

Mô tả tương tự - LM8500

nhà sản xuất	tên linh kiện	bảng dữ liệu	Giải thích chi tiết về linh kiện
National Semiconductor ...	LM8300	319Kb / 20P	Four Wire Resistive Touchscreen Controller with Brownout
Semtech Corporation	SX8651	632Kb / 39P	Multitouch 4-wire Resistive Touchscreen Controller with 15kV ESD Protection
	SX8654	2Mb / 62P	Haptics Enabled 4/5-Wire Resistive Touchscreen Controller with Proximity Sensing
	SX8657	2Mb / 61P	Haptics Enabled 4/5-Wire Resistive Touchscreen Controller with Proximity Sensing
	SX8677	2Mb / 63P	Haptics Enabled Multitouch 4/5-Wire Resistive Touchscreen Controller with Proximity Sensing
Axiomtek Co., Ltd.	P6122	276Kb / 2P	Resistive touchscreen
Texas Instruments	LM8300	440Kb / 26P	LM8300/LM8500 Four Wire Resistive Touchscreen Controller with Brownout
Semtech Corporation	SX8651EVKA	626Kb / 39P	Multitouch 4-wire Resistive Touchscreen Controller with 15kV ESD Protection
Semtech Corporation	SX8654EVK	2Mb / 62P	Haptics Enabled 4/5-Wire Resistive Touchscreen Controller with Proximity Sensing
STMicroelectronics	STMPE812	626Kb / 51P	S-Touch® enhanced 4-wire resistive touchscreen controller with PWM 25-Feb-2011

More results

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