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參數資料
| 型號： | LM8500IMT9 |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 消費家電 |
| 英文描述： | Four Wire Resistive Touchscreen Controller with Brownout |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PDSO48 |
| 封裝： | TSSOP-48 |
| 文件頁數： | 1/20頁 |
| 文件大小： | 319K |
| 代理商： | LM8500IMT9 |
LM8300/LM8400/LM8500
Four Wire Resistive Touchscreen Controller with
Brownout
General Description
The LM8300/8400/8500 is a 4-wire resistive touch screen
controller. 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
44 LLP, 44 PLCC,
48 TSSOP
44 LLP, 44 PLCC,
48 TSSOP
0C to +70C
LM8400
3, 5 V
No Brownout
3.27 MHz
18
0C to +70C
LM8500
5 V
4.17V to 4.5V
3.27, 10 MHz
18
0C to +70C
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
October 2002
L
2002 National Semiconductor Corporation
DS200372
www.national.com
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LM8500IMT9B | 功能描述:觸摸屏轉換器和控制器 RoHS:否 制造商:Microchip Technology 類型:Resistive Touch Controllers 輸入類型:3 Key 數據速率:140 SPS 分辨率:10 bit 接口類型:4-Wire, 5-Wire, 8-Wire, I2C, SPI 電源電壓:2.5 V to 5.25 V 電源電流:17 mA 工作溫度:- 40 C to + 85 C 封裝 / 箱體:SSOP-20 |
| LM8500IMT9B/NOPB | 功能描述:觸摸屏轉換器和控制器 RoHS:否 制造商:Microchip Technology 類型:Resistive Touch Controllers 輸入類型:3 Key 數據速率:140 SPS 分辨率:10 bit 接口類型:4-Wire, 5-Wire, 8-Wire, I2C, SPI 電源電壓:2.5 V to 5.25 V 電源電流:17 mA 工作溫度:- 40 C to + 85 C 封裝 / 箱體:SSOP-20 |
| LM8500IVA9 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Four Wire Resistive Touchscreen Controller with Brownout |
| LM8500-REF-01 | 功能描述:顯示開發工具 LM8500 DEV KIT RoHS:否 制造商:4D Systems 產品:4Display Shields 工具用于評估:?OLED-160-G1, ?OLED-160-G2 接口類型:Serial 工作電源電壓:5 V |
| LM8502 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Intelligent Lighting Management Unit That Fuses a 1.2A Dual High-Side Flash LED Driver with a 10-Output Low-Side LED Driver |
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