Part # LM8500 datasheet

Part Manufacturer: National Semiconductor

National Semiconductor

Part Description: LM8300 LM8500 Four Wire Resistive Touchscreen Controller with Brownout

Part Details:

LM8300/LM8500 PRELIMINARY December 2003 LM8300/LM8500Four Wire Resistive Touchscreen Controller withBrownout Four 1.0 General Description self-power down mode, the current drawn is typically lessthan 2 µA. The device resumes normal operation when a The LM8300/8500 is a 4-wire resistive touch screen control- touch is detected on the touch screen or communication is W ler. The controller samples and drives the touch screen detected on the UART. In addition to the self-power down without the need of any external hardware. The built in 10-bit mode, the controller can be disabled by pulling the SHUT- ire A/D provides a maximum of 500 coordinate pairs per second DOWN pin low. The controller resumes normal operation (cpps). The data sampled from the touch screen is sent out when the SHUTDOWN pin is tristated or pulled high. Resistive on the UART at a speed of 38400 bps. The controller has an internal non-volatile memory storage The controller has a power-saving mode which causes the element to store configuration data such as calibration points controller to self-power down when no touch is detected on or controller configurations. the touch screen for a specified amount of time. In the Devices included in this datasheet: Operating Brownout Operating I/O T Device Packages Temperature Voltage Voltage Frequency Pins ouchscreen 44 LLP, 44 PLCC, LM8300 3, 5 V 2.7 to 2.9 V 3.27 MHz 18 0°C to +70°C 48 TSSOP 44 LLP, 44 PLCC, LM8500 5 V 4.17V to 4.5V 3.27, 10 MHz 18

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LM8500.pdf Datasheet