LM8300HVA9

Overview

The LM8300HVA9/NOPB is a four-wire resistive touchscreen controller manufactured by Texas Instruments. It features an integrated 10-bit ADC capable of sampling up to 500 coordinate pairs per second. Data is transmitted via a UART interface operating at 38400 bps. The device supports low-power standby modes with current consumption typically below 2 µA and includes internal non-volatile memory for storing calibration data and configuration settings. It operates within a temperature range of 0°C to +70°C and utilizes a 44-pin PLCC package.

Feature Summary

• Integrated 10-bit A/D converter supporting maximum speeds of 500 coordinate pairs per second
• Built-in UART interface communicating at 38400 bps
• Low power standby mode with typical current draw less than 2 µA
• Internal non-volatile memory for storing calibration points and controller configurations

Applications

• Personal Digital Assistants
• Smart Hand-Held Devices
• Touch Screen Monitors
• Point-of-Sales Terminals
• KIOSK

Procurement Notes

Verify the component designation against official datasheets to confirm it is the LM8300 variant, as the LM8500 shares similar packaging but differs in brownout voltage thresholds and oscillator capabilities. Ensure the specific suffix matches the required package type and temperature rating. Cross-reference ordering information with manufacturer documentation to avoid confusion with legacy National Semiconductor part numbers.

Selection Notes

Select this component for applications requiring a dedicated controller for four-wire resistive touch panels without external driver hardware. The LM8300 is suitable for systems needing low standby power and internal storage for calibration data. Consider the LM8500 if higher operating frequencies or different brownout protection levels are required. Verify that the system design accommodates the 44-pin PLCC footprint and UART communication requirements.

Part Context

The LM8300 belongs to the LM8300/LM8500 family of touchscreen controllers. The 'H' indicates a 44-pin package, 'VA' denotes the PLCC package type, and '9' specifies the commercial temperature range (0°C to +70°C). This specific part number represents the version with low brownout voltage characteristics designed for 3V or 5V operation.

Replacement Considerations

Public confirmed substitute part numbers: None identified in verified source material.