MPR084EJ Freescale Semiconductor, MPR084EJ Datasheet - Page 2

• Manufacturer Part Number: MPR084EJ
• Description: IC CTLR TOUCH SENSR PROX 16TSSOP
• Manufacturer: Freescale Semiconductor
• Type: Capacitiver

Specifications of MPR084EJ

• 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-TSSOP
• Output Type: Voltage
• Interface: I²C
• Input Type: Logic
• Supply Voltage: 3.3 V
• Dimensions: 5 mm L x 4.4 mm W x 1.05 mm H
• For Use With: KITMPR084EVM - KIT EVAL 8-PAD TOUCH MPR084
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

MPR084
2
1
1.1
Freescale Semiconductor’s MPR084 proximity capacitive touch sensor controller is one of a family of products designed to detect
the state of capacitive touch pads. The MPR084 offers designers a cost-efficient alternative to mechanical keys for control panel
applications.
The MPR084 uses an I
host of status changes. The MPR084 includes a piezo sounder drive which provides audible feedback to simulate mechanical
key clicks. The MPR08X family has several implementations to use in your design including control panels and switch
replacements. The MPR084 controls individual touch pads. Other members of the MPR08X family are well suited for other
application interface situations such as individual touch pads or rotary/touch pad combinations.
Freescale offers a broad portfolio of proximity sensors for products ranging from appliance control panels to portable electronics.
Target markets include consumer, appliance, industrial, medical and computer peripherals.
1.1.1
The MPR08X series of Proximity Capacitive Touch Sensor Controllers allows for a wide range of applications and
implementations. Each of the products in
functionality.
Table 1. MPR08X Family Overview
1.1.2
The MPR084 consists of primary functional blocks; Interrupt Controller, I
and Status registers, Touch Pad Decoder, Magnitude Comparator and Recalibrator, EMI Burst/Noise Rejection Filter,
Capacitance Measurement Analog Front End. Each of these blocks will be described in detail in their respective sections.
MPR083
MPR084
ATTN
IRQ
SDA
SCL
AD0
SOUNDER
Product
Device Overview
Introduction
Devices in the MPR08X series
Internal Block Diagram
CONTROLLER
CONTROLLER
INTERRUPT
INTERFACE
SOUNDER
DRIVER
SERIAL
I 2 C
2
C interface to communicate with the host which configures the operation and an interrupt to advise the
CLEAR
Bus
MASKS
I
I
RATE
2
2
SET
C
C
Table 1
Figure 2. Functional Block Diagram
CURRENT
ENABLED
perform a different application specific task and are optimized for this specific
PAD
PAD
Sounder
Yes
Yes
TOUCHED
DECODER
IDENTIFY
PAD
2
C Serial Interface, Sounder Controller, Configuration
8
Rotary/Slider
8-pads
—
8
8
Freescale Semiconductor
Touch Pad Array
8
8 keys
8 TOUCH PADS
—
Sensors