STMPE321QTR STMicroelectronics, STMPE321QTR Datasheet - Page 3

• Manufacturer Part Number: STMPE321QTR
• Description: IC CTLR TOUCH KEY 3CH 12-QFN
• Manufacturer: STMicroelectronics
• Series: S-Touch™r
• Type: Capacitiver

Specifications of STMPE321QTR

• Number Of Inputs/keys: 3 Key
• Resolution (bits): 8 b
• Data Interface: I²C
• Data Rate/sampling Rate (sps, Bps): 100k
• Voltage - Supply: 1.65 V ~ 1.95 V
• Mounting Type: Surface Mount
• Package / Case: 12-QFN
• Voltage Supply Source: Single Supply
• Resolution: 7 bit to 10 bit
• Interface Type: I2C
• Supply Voltage (max): 1.95 V
• Supply Voltage (min): 1.65 V
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Operating Temperature: -
• Sampling Rate (per Second): -
• Lead Free Status / Rohs Status: Details
• Other names: 497-8985-2

STMPE321
1
1.1
STMPE321 functional overview
The STMPE321 consists of the following blocks:
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STMPE321 block diagram
Figure 1.
GPIO controller
Impedance sensor
Touchkey controller
I
2
C interface
RST
SCLK
SDA
INT
Functional block diagram
interface
GND
Host
Doc ID 15791 Rev 3
controller
VCC
IO
Impedance
Touchkey
controller
sensor
STMPE321 functional overview
ARef
Touch 0-2
GPIO 0-2
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