STMPE24M31QTR STMicroelectronics, STMPE24M31QTR Datasheet - Page 74
![IC SENSOR S-TOUCH 24CH 40QFN](/photos/6/91/69170/32-vqfn_sml.jpg)
STMPE24M31QTR
Manufacturer Part Number
STMPE24M31QTR
Description
IC SENSOR S-TOUCH 24CH 40QFN
Manufacturer
STMicroelectronics
Series
S-Touch™r
Type
Capacitiver
Datasheets
1.STMPE821QTR.pdf
(5 pages)
2.STMPE16M31QTR.pdf
(85 pages)
3.STMPE24M31QTR.pdf
(83 pages)
Specifications of STMPE24M31QTR
Number Of Inputs/keys
24 Key
Data Interface
I²C
Data Rate/sampling Rate (sps, Bps)
100k, 400k
Voltage Reference
External
Voltage - Supply
1.65 V ~ 1.95 V
Current - Supply
900µA
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
40-VQFN
Output Type
Logic
Interface
I²C
Input Type
Logic
Supply Voltage
1.8 V
Number Of Channels
24
Dimensions
5 mm L x 5 mm W x 0.85 mm H
Temperature Range
- 40 C to + 85 C
Termination Style
SMD/SMT
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
497-10380-2
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
STMPE24M31QTR
Manufacturer:
STM
Quantity:
8 061
Application information
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17.1
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Application information
Average current consumption
In application, it is unlikely that touch event occurs 100% of the time. Power consumption for
STMPExxM31 can be reduced significantly with the proper use of the available device Sleep
mode. The device can be programmed into Sleep mode upon detecting of the finger lift.
During the Sleep mode, upon detecting a touch, STMPExxM31 goes from Sleep to Active
mode after 15 ms.
As such, for an example touch profiles in
over the 6 seconds is:
= [(0.185+0.285+0.285) * 400 uA + ( 5.245 * 50 uA)]/6
= 94 uA.
Figure 20. Average current consumption
400 u A
5 0 u A
0 .0 s
0 .3 s
0 .5 s
0 .8 s
Doc ID 16174 Rev 3
1 .1 s
Figure 20
below, the Average current consumption
2 .3 s
STMPE16M31, STMPE24M31
2 .6 s
6 .0 s
AM08687V1