CAP1188 Sensor: Diagram, Pinout, and Datasheet [Video&FAQ]

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Published: 04 May 2022 | Last Updated: 04 May 2022

2799

CAP1188-1-CP-TR

CAP1188-1-CP-TR

Microchip Technology

Capacitive Sensor CAP1188 24 Pin 24-TFQFN Exposed Pad

Purchase Guide

Capacitive Sensor CAP1188 24 Pin 24-TFQFN Exposed Pad

The CAP1188, which uses RightTouch® technology, is a multi-channel capacitive touch sensor with numerous LED drivers. This article mainly introduces Diagram, Pinout, Datasheet and other detailed information about Microchip Technology CAP1188.

This video will be looking at an "Capacitive Touch Sensor" CAP1188 component.

Arduino Capacitive Touch-Free Touch Sensor Tutorial

CAP1188 Description

The CAP1188, which uses RightTouch® technology, is a multi-channel capacitive touch sensor with numerous LED drivers. It has eight (8) individually programmable capacitive touch sensor inputs for use in touch sensor applications. To compensate for slow environmental changes, each sensor input automatically recalibrates.

The CAP1188 additionally includes eight (8) LED drivers with full-on/off, variable rate blinking, dimming, and breathing capabilities. When a touch is detected, each of the LED drivers can be coupled to one of the sensor inputs and triggered. A host controller can also be used to control each LED driver individually.

Multiple Pattern Touch recognition is included into the CAP1188.  allowing the user to pick a specific set of buttons to be touched at the same time. A status bit is set and an interrupt is generated if this pattern is detected.

The CAP1188 also comes with circuitry and support for improved sensor proximity detection.

Multiple power states are available on the CAP1188, all of which operate at low quiescent currents. One or more capacitive touch sensor inputs are active in the Standby state of operation, and all LEDs may be utilised. When a touch is detected, the WAKE/SPI MOSI pin is used to wake up the system.

Deep Sleep is the lowest power state, drawing 5uA of electricity on average. No sensor inputs are active in this state. The device will be awakened by driving the WAKE/SPI MOSI pin or by using communications.


CAP1188 Pinout

The CAP1188 Pinout is shown as follows.

pinout.jpg

Pinout

Pin NumberPin NameDescription
1SPI_CS#Active low chip-select for SPI bus
2WAKE / SPI_-MOSIWAKE - Active high wake / interrupt output - Standby power state - requires pull-down resistor
WAKE - Active high wake input Deep Sleep power state - requires pull-down resistor
SPI_MOSI - SPI Master-Out-Slave-In port when used in normal mode
3SMDATA / SPI_MSIO / SPI_MISOSMDATA - Bi-directional, open-drain SMBus data - requires pull-up resistor
SPI_MSIO - SPI Master-Slave-In-Out bidirectional port when used in bi-directional mode
SPI_MISO - SPI Master-In-Slave-Out port when used in normal mode
4SMCLK / BC_-CLK / SPI_-CLKSMCLK - SMBus clock input - requires pull-up resistor
SPI_CLK - SPI clock input
5LED1Open drain LED 1 driver (default)
Push-pull LED 1 driver
6LED2Open drain LED 2 driver (default)
Push-pull LED 2 driver
7LED3Open drain LED 3 driver (default)
Push-pull LED 3 driver
8LED4Open drain LED 4 driver (default)
Push-pull LED 4 driver
9LED5Open drain LED 5 driver (default)
Push-pull LED 5 driver
10LED6Open drain LED 6 driver (default)
Push-pull LED 6 driver
11LED7Open drain LED 7driver (default)
Push-pull LED 7 driver
12LED8Open drain LED 8 driver (default)
Push-pull LED 8 driver
13ALERT#ALERT# - Active low alert / interrupt output for SMBus alert or SPI interrupt - requires pull-up resis tor (default)
ALERT - Active high push-pull alert / interrupt out put for SMBus alert or SPI interrupt
14ADDR_COMMAddress / communications select pin - pull-down resistor determines address / communications mechanism
15CS8Capacitive Touch Sensor Input 8
16CS7Capacitive Touch Sensor Input 7
17CS6Capacitive Touch Sensor Input 6
18CS5Capacitive Touch Sensor Input 5
19CS4Capacitive Touch Sensor Input 4
20CS3Capacitive Touch Sensor Input 3
21CS2Capacitive Touch Sensor Input 2
22CS1Capacitive Touch Sensor Input 1
23VDDPositive Power supply
24RESETActive high soft reset for system - resets all regis ters to default values.
Bottom PadGNDGround


CAP1188 CAD Model

The followings show CAP1188 Symbol, Footprint and 3D Model.

symbol.png

Symbol

footprint.png

Footprint

3d model.jpg

3D Model


CAP1188 Features

Eight (8) Capacitive Touch Sensor Inputs

- Programmable sensitivity

- Automatic recalibration

- Individual thresholds for each button

• Proximity Detection

• Multiple Button Pattern Detection 

• Calibrates for Parasitic Capacitance 

• Analog Filtering for System Noise Sources

• Press and Hold feature for Volume-like Applications

• Multiple Communication Interfaces 

SMBus  / I2C compliant interface

SPI  communications

- Pin selectable communications protocol and multiple slave addresses (SMBus /  I2C only)

• Low Power Operation

- 5uA quiescent current in Deep Sleep

- 50uA quiescent current in Standby (1 sensor input monitored)

- Samples one or more channels in Standby

• Eight (8) LED Driver Outputs

- Open Drain or Push-Pull

- Programmable blink, breathe, and dimness controls

- Can be linked to Capacitive Touch Sensor inputs

• Dedicated Wake output flags touches in low power state

• System RESET pin

• Available in 24-pin 4mm x 4mm  RoHS  compliant QFN package


Specifications

Microchip Technology CAP1188-1-CP-TR technical specifications, attributes, parameters and parts with similar specifications to Microchip Technology CAP1188-1-CP-TR.
  • Type
    Parameter
  • Factory Lead Time
    7 Weeks
  • Mount

    In electronic components, the term "Mount" typically refers to the method or process of physically attaching or fixing a component onto a circuit board or other electronic device. This can involve soldering, adhesive bonding, or other techniques to secure the component in place. The mounting process is crucial for ensuring proper electrical connections and mechanical stability within the electronic system. Different components may have specific mounting requirements based on their size, shape, and function, and manufacturers provide guidelines for proper mounting procedures to ensure optimal performance and reliability of the electronic device.

    Surface Mount
  • Mounting Type

    The "Mounting Type" in electronic components refers to the method used to attach or connect a component to a circuit board or other substrate, such as through-hole, surface-mount, or panel mount.

    Surface Mount
  • Package / Case

    refers to the protective housing that encases an electronic component, providing mechanical support, electrical connections, and thermal management.

    24-TFQFN Exposed Pad
  • Number of Pins
    24
  • Operating Temperature

    The operating temperature is the range of ambient temperature within which a power supply, or any other electrical equipment, operate in. This ranges from a minimum operating temperature, to a peak or maximum operating temperature, outside which, the power supply may fail.

    -40°C~125°C
  • Packaging

    Semiconductor package is a carrier / shell used to contain and cover one or more semiconductor components or integrated circuits. The material of the shell can be metal, plastic, glass or ceramic.

    Tape & Reel (TR)
  • Published
    2003
  • JESD-609 Code

    The "JESD-609 Code" in electronic components refers to a standardized marking code that indicates the lead-free solder composition and finish of electronic components for compliance with environmental regulations.

    e3
  • Part Status

    Parts can have many statuses as they progress through the configuration, analysis, review, and approval stages.

    Active
  • Moisture Sensitivity Level (MSL)

    Moisture Sensitivity Level (MSL) is a standardized rating that indicates the susceptibility of electronic components, particularly semiconductors, to moisture-induced damage during storage and the soldering process, defining the allowable exposure time to ambient conditions before they require special handling or baking to prevent failures

    3 (168 Hours)
  • ECCN Code

    An ECCN (Export Control Classification Number) is an alphanumeric code used by the U.S. Bureau of Industry and Security to identify and categorize electronic components and other dual-use items that may require an export license based on their technical characteristics and potential for military use.

    EAR99
  • Type
    Buttons
  • Terminal Finish

    Terminal Finish refers to the surface treatment applied to the terminals or leads of electronic components to enhance their performance and longevity. It can improve solderability, corrosion resistance, and overall reliability of the connection in electronic assemblies. Common finishes include nickel, gold, and tin, each possessing distinct properties suitable for various applications. The choice of terminal finish can significantly impact the durability and effectiveness of electronic devices.

    Matte Tin (Sn) - annealed
  • Voltage - Supply

    Voltage - Supply refers to the range of voltage levels that an electronic component or circuit is designed to operate with. It indicates the minimum and maximum supply voltage that can be applied for the device to function properly. Providing supply voltages outside this range can lead to malfunction, damage, or reduced performance. This parameter is critical for ensuring compatibility between different components in a circuit.

    3V~3.6V
  • Peak Reflow Temperature (Cel)

    Peak Reflow Temperature (Cel) is a parameter that specifies the maximum temperature at which an electronic component can be exposed during the reflow soldering process. Reflow soldering is a common method used to attach electronic components to a circuit board. The Peak Reflow Temperature is crucial because it ensures that the component is not damaged or degraded during the soldering process. Exceeding the specified Peak Reflow Temperature can lead to issues such as component failure, reduced performance, or even permanent damage to the component. It is important for manufacturers and assemblers to adhere to the recommended Peak Reflow Temperature to ensure the reliability and functionality of the electronic components.

    NOT SPECIFIED
  • Time@Peak Reflow Temperature-Max (s)

    Time@Peak Reflow Temperature-Max (s) refers to the maximum duration that an electronic component can be exposed to the peak reflow temperature during the soldering process, which is crucial for ensuring reliable solder joint formation without damaging the component.

    NOT SPECIFIED
  • Base Part Number

    The "Base Part Number" (BPN) in electronic components serves a similar purpose to the "Base Product Number." It refers to the primary identifier for a component that captures the essential characteristics shared by a group of similar components. The BPN provides a fundamental way to reference a family or series of components without specifying all the variations and specific details.

    CAP1188
  • Operating Supply Voltage

    The voltage level by which an electrical system is designated and to which certain operating characteristics of the system are related.

    3.3V
  • Interface

    In electronic components, the term "Interface" refers to the point at which two different systems, devices, or components connect and interact with each other. It can involve physical connections such as ports, connectors, or cables, as well as communication protocols and standards that facilitate the exchange of data or signals between the connected entities. The interface serves as a bridge that enables seamless communication and interoperability between different parts of a system or between different systems altogether. Designing a reliable and efficient interface is crucial in ensuring proper functionality and performance of electronic components and systems.

    I2C, SMBus, SPI
  • Operating Supply Current

    Operating Supply Current, also known as supply current or quiescent current, is a crucial parameter in electronic components that indicates the amount of current required for the device to operate under normal conditions. It represents the current drawn by the component from the power supply while it is functioning. This parameter is important for determining the power consumption of the component and is typically specified in datasheets to help designers calculate the overall power requirements of their circuits. Understanding the operating supply current is essential for ensuring proper functionality and efficiency of electronic systems.

    500μA
  • Load Capacitance

    the amount of capacitance measured or computed across the crystal terminals on the PCB. Frequency Tolerance. Frequency tolerance refers to the allowable deviation from nominal, in parts per million (PPM), at a specific temperature, usually +25°C.

    400pF
  • Number of Inputs
    8
  • Touchscreen

    A touchscreen is a type of input device that allows users to interact with electronic devices by touching the display screen directly with their fingers or a stylus. It is a user-friendly interface that enables users to navigate through menus, input data, and perform various functions by simply touching the screen. Touchscreens can be found in a wide range of electronic devices such as smartphones, tablets, laptops, and interactive kiosks. They are designed to be intuitive and responsive, providing a more engaging and efficient user experience compared to traditional input methods like keyboards and mice. Touchscreens can be either resistive or capacitive, each with its own advantages and limitations in terms of accuracy, sensitivity, and durability.

    Capacitive
  • Proximity Detection

    A proximity sensor is a non-contact sensor that detects the presence of an object (often referred to as the “target”) when the target enters the sensor’s field. Depending on the type of proximity sensor, sound, light, infrared radiation (IR), or electromagnetic fields may be utilized by the sensor to detect a target.

    Yes
  • RoHS Status

    RoHS means “Restriction of Certain Hazardous Substances” in the “Hazardous Substances Directive” in electrical and electronic equipment.

    ROHS3 Compliant
  • Lead Free

    Lead Free is a term used to describe electronic components that do not contain lead as part of their composition. Lead is a toxic material that can have harmful effects on human health and the environment, so the electronics industry has been moving towards lead-free components to reduce these risks. Lead-free components are typically made using alternative materials such as silver, copper, and tin. Manufacturers must comply with regulations such as the Restriction of Hazardous Substances (RoHS) directive to ensure that their products are lead-free and environmentally friendly.

    Lead Free
0 Similar Products Remaining

Parts with Similar Specs

The three parts on the right have similar specifications to Microchip Technology & CAP1188-1-CP-TR.

CAP1188 Functional Block Diagram

The following figure is CAP1188 Functional Block Diagram.

BLOCK DIAGRAM.png

Functional Block Diagram


System Diagram for CAP1188

The System Diagram for CAP1188 is shown as follows.

System Diagram for CAP1188.png

System Diagram for CAP1188


CAP1188 Alternatives

Part NumberDescriptionManufacturer
CAP1188-1-CP-TRDRIVERS AND INTERFACESLED DriverSMSC


CAP1188 Applications

• Desktop and Notebook PCs

• LCD Monitors

• Consumer Electronics

• Appliances


CAP1188 Package

The CAP1188 Package is given below.

package.png

Package


CAP1188 Manufacturer

Microchip Technology Inc. is a leading provider of microcontroller and analog semiconductors, delivering low-risk product development, reduced overall system cost, and faster time to market to thousands of customers across the world. Microchip, based in Chandler, Arizona, provides excellent technical support as well as consistent delivery and quality.


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Datasheet PDF

Download datasheets and manufacturer documentation for Microchip Technology CAP1188-1-CP-TR.
Frequently Asked Questions

What technology does the CAP1188 use?

RightTouch® technology.

How many individually programmable capacitive touch sensor inputs does the CAP1188 have?

Eight (8).

What does the CAP1188 compensate for?

Slow environmental changes.

What can each of the LED drivers be coupled to when a touch is detected?

One of the sensor inputs and triggered.

What can be used to control each LED driver individually?

Host controller.

What is included in the CAP1188?

Multiple Pattern Touch recognition.

What is the purpose of the CAP1188?

Allowing the user to pick a specific set of buttons to be touched at the same time.

What happens if a pattern is detected on the CAP1188?

A status bit is set and an interrupt is generated if this pattern is detected.

What does the CAP1188 support?

Improved sensor proximity detection.

What power states are available on the CAP1188?

Multiple power states.

What state is one or more capacitive touch sensor inputs active in?

Standby state of operation.

What is used to wake up the system when a touch is detected?

WAKE/SPI MOSI pin.

What is the lowest power state?

Deep Sleep.

How will the device be awakened?

By driving the WAKE/SPI MOSI pin or by using communications.
CAP1188-1-CP-TR

Microchip Technology

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