STMPE16M31PX Datasheet, PDF (1/75 Pages) STMicroelectronics – Up to 30 pF external reference capacitor

STMPE16M31PX
S-Touch^® 16-channel touchkey controller
with proximity sensing
Features
■ Up to 16 capacitive sensor inputs
■ Independent and configurable automatic
calibration on all channels
) _{■ Proximity sensing capability for over 3 cm}
t(s ^distance
c _{■ 15 fF resolution, 512 steps with 30 pF auto-}
du ^tuning
ro ^{■ Up to 30 pF external reference capacitor}
P _{■ PWM and GPIO:}
te ^{– Up to 16 general purpose inputs/outputs}
le ^{– 8 independent PWM controllers, up to 16}
o PWM outputs
s _{– 12 mA sourcing/sinking on GPIO for LED}
Ob ^{driving (at 3.3 V VIO)}
- ^{– Maximum source/sink current 120 mA}
) _{■ Operating voltage:}
t(s – 1.65 - 1.95 V (V_CC, internally supplied)
c _{– 2.7- 5.5 V(VIO)}
du _{■ Low operating current: 300 µA in active mode,}
ro ^{40 µA in sleep mode and 5 µA in hibernate}
P ^mode
te ^{■ I2C interface (up to 400 kHz). I2C is 3.3 V}
le ^tolerant
o ■ 8 kV HBM ESD protection on all sensing pins
Obs ^Applications
QFN32
(4 x 4 mm)
Description
The STMPE16M31PX capacitive touchkey
controllers offer highly versatile and flexible
capacitive sensing capabilities in one single chip.
The devices integrate up to 16 capacitive sensing
channels which are highly sensitive and noise
tolerant. Eight independent PWM controllers allow
to control up to 16 LEDs with brightness control,
ramping and blinking capabilities. The I²C
interface supports up to 400 kHz communication
with the system host. A very wide dynamic range
allows most applications to work without
hardware tuning.
A single STMPE16M31PX device can be used to
implement a complete notebook multimedia
control bar with eight capacitive touchkeys,
proximity sensor with sensitivity up to 5 cm and
■ Multimedia bars in notebook computers
eight independently controlled LED.
■ Portable media players and game consoles
■ Mobile phones and smartphones
Table 1. Device summary
Order code
STMPE16M31PXQTR
Package
QFN32 (4 x 4 mm)
Packaging
Tape and reel
January 2011
Doc ID 17058 Rev 2
1/75
www.st.com
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