MPR084QR2 Freescale Semiconductor, MPR084QR2 Datasheet - Page 4

• Manufacturer Part Number: MPR084QR2
• Description: IC CTLR TOUCH SENSOR PROX 16-QFN
• Manufacturer: Freescale Semiconductor
• Type: Capacitiver

Specifications of MPR084QR2

• Number Of Inputs/keys: 8 Key
• Data Interface: I²C, Serial
• Voltage - Supply: 1.8 V ~ 3.6 V
• Current - Supply: 1.62mA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-QFN Exposed Pad
• Output Type: Voltage
• Interface: I²C
• Input Type: Logic
• Supply Voltage: 3.3 V
• Dimensions: 5 mm L x 5 mm W x 1 mm H
• For Use With: KITMPR084EVM - KIT EVAL 8-PAD TOUCH MPR084
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

MPR084
4
2
2.1
Table 3
appropriate chapter.
Table 3. Device Pin Assignment
The two packages available for the MPR084 are a 5x5mm 16 pin QFN and a 4x5mm 16 pin TSSOP. Both of the packages and
their respective pinouts are shown in
2.2
The MPR084 Capacitive Touch Sensor Controller requires ten external passive components. When connecting the MPR084 in
a touch sensor system, the electrode lines must have pull-up resistors. The recommended value for these pull-ups is 780k.
Some electrode arrays will require higher or lower values depending on the application.
In addition to the 8 resistors a bypass capacitor of 1µF should always be used between the VDD and VSS lines.and a 4.7 k
pull-up resistor should be included on the IRQ.
9 - 16
PAD
Pin
1
2
3
4
5
6
7
8
ATTN
IRQ
VDD
VSS
shows the pin assignment for the MPR084. For a more detailed description of the functionality of each pin, refer to the
External Signal Description
Device Pin Assignment
Recommended System Connections
E1, E2, E3, E4, E5,
Exposed pad
1
2
3
4
SOUNDER
E6, E7, E8
Name
ATTN
VDD
SDA
VSS
SCL
AD0
IRQ
16
5
15
6
QFN
14
7
Attention Pin. Input, active low, when asserted sets the Configuration Register’s DCE bit high
allowing communication with the part.
Interrupt Request Pin. Output, active-low, open-drain interrupt request signaling new events.
Positive Supply Voltage
Ground
Address input. Low = slave address 0x5C. High = slave address 0x5D.
Sounder driver output. Connect a piezo sounder from this output to ground. Output is push-pull
Touch Pad Electrode connections.
Exposed pad on package underside (QFN only). Connect to VSS.
I
I
2
2
13
8
C Serial Clock
C Serial Data
Figure
12
11
10
9
E5
E6
E7
E8
3.
Figure 3. Package Pinouts
SOUNDER
ATTN
VDD
IRQ
SDA
VSS
SCL
AD0
Function
2
3
4
5
6
7
8
1
TSSOP
16
15
14
13
12
11
10
Freescale Semiconductor
9
E1
E2
E3
E4
E5
E6
E7
E8
Sensors