STMPE321QTR STMicroelectronics, STMPE321QTR Datasheet - Page 4

• 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 functional overview
1.2
4/40
Pin assignment and function
Figure 2.
Table 2.
Pin number
10
11
12
1
2
3
4
5
6
7
8
9
QFN12 pin assignment (top view)
Pin assignment and function
GPIO_2 / touch 2
GPIO_1 / touch 1
GPIO_0 / touch 0
Pin name
GND
ARef
VCC
SDA
SCL
RST
INT
NC
NC
Doc ID 15791 Rev 3
GPIO 2
GPIO 1
GPIO 0
-
I
I
GND
Supply voltage
Reference capacitor for touch sensor
-
INT output (open drain)
RESET (active low)
This pin is internally pulled up to V
2
2
C data
C clock
Description
CC
STMPE321