The MPR121 features increased internal intelligence.

Freescale Semiconductor (Austin, TX) is expanding its broad portfolio of touch sensing solutions with the addition of the MPR121 ultra-low-power capacitive sensor. The MPR121 is the second-generation sensor controller, following the MPR03x series devices. The MPR121 features increased internal intelligence and Freescale’s second-generation capacitance detection engine, without increasing complexity. Features include:

• Support for up to 12 touch electrodes.
• 1.71 to 3.6 V operation.
• Extremely low power, with 29 micro amps average supply current.
  • All 12 electrodes monitored with 16 ms response time.
• Continuous independent auto-calibration for each electrode.
• Separate touch and release trip thresholds for each electrode.
  • Hysteresis and electrode independence.
• Drives up to 8 LEDs or provides up to 8 logic I/Os in any combination.
• 3 micro amps maximum shutdown current.
• I²C interface with IRQ output to advise electrode status changes.
• 3 x 3 x 0.6 mm 20-lead QFN package.
• -40° to +85°C operating temperature range.

For more information visit www.freescale.com