TIDM-1021 Reference Design

Texas Instruments

Liquid Tolerant Capacitive Touch Keypad Reference Design


The Liquid Tolerant Capacitive Touch Keypad Design (TIDM-1021) is a reference design for implementing liquid tolerant capacitive touch human-machine interfaces (HMIs).  It integrates TI's MSP430FR2633 microcontroller (MCU) featuring high performance CapTIvate™ touch technology with an optimized sensor layout design and software.  This reference design demonstrates how to design capacitive touch hardware and software that can work reliably under liquid influence and pass challenging tests for conductive noise immunity.

  • MSP430™ CapTIvate MCU for Liquid-Tolerant Capacitive-Touch Sensing
  • Advanced Human Machine Interface Design with 12-Button Keypad
  • 12 LEDs Driven by MSP430 CapTIvate MCU for Backlighting
  • Passes IEC 61000-4-6 Conducted Noise Immunity Test at 3 Vrms Stress Level
  • No False Touch Detection and Accurately Detect Touched Button under IPX5 Rating Test with AC Power
  • Washers & Dryers
  • Smart Watch
  • Dish Washers
  • Ovens
  • Cooker Hoods
Product Categories
  • MSP430 ultra-low-power MCUs


Part Number Name Companion Part
MSP430FR2533IRHBR MSP430FR2533IRHBR Buy Datasheet
MSP430FR2533IRHBT MSP430FR2533IRHBT Buy Datasheet
MSP430FR2533IDAR MSP430FR2533IDAR Buy Datasheet
MSP430FR2533IDA MSP430FR2533IDA Buy Datasheet
MSP430FR2633IRHBR MSP430FR2633IRHBR Buy Datasheet
MSP430FR2633IDAR MSP430FR2633IDAR Buy Datasheet
MSP430FR2633IDA MSP430FR2633IDA Buy Datasheet
MSP430FR2633IRHBT MSP430FR2633IRHBT Buy Datasheet
MSP430FR2633IYQWT MSP430FR2633IYQWT Buy Datasheet
MSP430FR2633IYQWR MSP430FR2633IYQWR Buy Datasheet

Bill Of Materials

Download the bill of materials for TIDM-1021 Download


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Download the schematic for TIDM-1021

Test Data

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Download the test file for TIDM-1021

Other Documents

Title Updated Type Size (KB)
Liquid Tolerant Capacitive Touch Keypad Reference Design 31 Jul 2018 PDF 2273
CapTIvate™ Technology Guide
TIDM-1021 Gerber 31 Jul 2018 ZIP 452
TIDM-1021 CAD Files 31 Jul 2018 ZIP 433
TIDM-1021 PCB 31 Jul 2018 PDF 829
TIDM-1021 Assembly Drawing 31 Jul 2018 PDF 104
TIDM-1021 BOM 31 Jul 2018 PDF 227
TIDM-1021 Schematic 31 Jul 2018 PDF 130