STMPE24M31QTR Datasheet, PDF (1/85 Pages) STMicroelectronics – S-Touch® 16/24-channel touchkey controller with PWM and ratio engines

STMPE16M31
STMPE24M31
S-Touch^® 16/24-channel touchkey controller
with PWM and ratio engines
Features
■ Up to 24 capacitive sensor inputs
■ Independent and configurable automatic
calibration on all channels
) _{■ 15 fF resolution, 512 steps with 30 pF auto-}
t(s ^tuning
c _{■ Up to 30 pF external reference capacitor}
du _{■ 2 units of 8-input ratiometric engines}
ro ^{supporting 256 steps slider/wheel}
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: 400 µA in active mode,}
ro ^{50 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 ^{■ 200V MM ESD protection on all pins}
QFN40
(5 x 5 mm)
QFN32
(4 x 4 mm)
Description
The STMPE16M31 and STMPE24M31 capacitive
touchkey controllers offer highly versatile and
flexible capacitive sensing capabilities in one
single chip.
The devices integrate up to 24 capacitive sensing
channels which are highly sensitive and noise
tolerant. Two units of hardwired ratiometric
engines enable the implementation of a
slider/wheel without external computations. 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 STMPE24M31 device can be used to
Applications
implement a complete notebook multimedia
■ Multimedia bars in notebook computers
control bar with eight capacitive touchkeys, an 8-
channel slider with 256 steps resolution and eight
■ Portable media players and game consoles
independently controlled LED.
■ Mobile phones and smartphones
Table 1. Device summary
Order code
Package
Packaging
STMPE24M31QTR
STMPE16M31QTR
QFN40 (5 x 5 mm)
QFN32 (4 x 4 mm)
Tape and reel
Tape and reel
April 2011
Doc ID 16174 Rev 4
1/85
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