TCA8418EYFPR

Product Overview

Category

TCA8418EYFPR belongs to the category of integrated circuits (ICs).

Use

This IC is commonly used for keypad scanning and GPIO expansion applications.

Characteristics

• Keypad scanning: TCA8418EYFPR is designed to scan and decode key presses from a matrix keypad.
• GPIO expansion: It provides additional general-purpose input/output (GPIO) pins for expanding the number of available I/Os in a system.

Package

TCA8418EYFPR is available in a small form factor package, such as QFN (Quad Flat No-leads), which makes it suitable for space-constrained applications.

Essence

The essence of TCA8418EYFPR lies in its ability to efficiently scan and decode key presses from a matrix keypad, while also providing extra GPIO pins for system expansion.

Packaging/Quantity

TCA8418EYFPR is typically packaged in reels or tubes, with a quantity of around 2500 units per reel/tube.

Specifications

• Supply voltage range: 1.65V to 3.6V
• Number of keypad inputs: 18
• Number of GPIO pins: 8
• Communication interface: I2C (Inter-Integrated Circuit)
• Operating temperature range: -40°C to +85°C
• Package type: QFN

Detailed Pin Configuration

The pin configuration of TCA8418EYFPR is as follows:

1. SDA (I2C data)
2. SCL (I2C clock)
3. INT (Interrupt output)
4. RST (Reset input)
5. K0-K7 (Keypad inputs)
6. GPO0-GPO7 (GPIO outputs)

Functional Features

• Keypad scanning: TCA8418EYFPR can scan up to 18 keys in a matrix keypad configuration, providing accurate key press detection.
• Key decoding: It decodes the scanned key presses and provides the corresponding key code output.
• GPIO expansion: The IC offers 8 additional GPIO pins for system expansion, allowing connection to various peripheral devices.
• Interrupt output: TCA8418EYFPR generates an interrupt signal (INT) to notify the host microcontroller of any key press or GPIO status change.

Advantages and Disadvantages

Advantages

• Efficient keypad scanning and key decoding capabilities.
• Compact package size suitable for space-constrained applications.
• Additional GPIO pins for system expansion.

Disadvantages

• Limited number of keypad inputs (18).
• Requires an external microcontroller to interface with the keypad and GPIOs.

Working Principles

TCA8418EYFPR operates by sequentially scanning the rows and columns of a matrix keypad. It detects key presses by monitoring the changes in the keypad's electrical characteristics. The IC then decodes the scanned key presses and provides the corresponding key code output. Additionally, it monitors the status of the GPIO pins and generates an interrupt signal to notify the host microcontroller of any key press or GPIO status change.

Detailed Application Field Plans

TCA8418EYFPR finds applications in various fields, including: 1. Consumer electronics: Keypad-based devices such as remote controls, gaming consoles, and home appliances. 2. Industrial control systems: Keypad interfaces for machinery control panels and operator interfaces. 3. Automotive: Keypad input modules for infotainment systems and vehicle control panels. 4. Security systems: Keypad-based access control panels and security keypads.

Detailed and Complete Alternative Models

Some alternative models to TCA8418EYFPR that offer similar functionality are: 1. TCA8414EYFPR 2. TCA8418EYFFR 3. TCA8418EYFR

These models have comparable specifications and can be considered as alternatives depending on specific application requirements.

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