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The TCA8418EYFPR is a keyboard scanning device with integrated electrostatic discharge (ESD) protection. It operates within a voltage range of 1.65 V to 3.6 V and features 18 general-purpose input/output (GPIO) ports, supporting up to 80 keys via an I2C interface.

The TCA8418EYFPR optimises power consumption and bandwidth by processing keyboard scanning algorithms. This device is particularly suitable for use with processors that have limited GPIO interfaces.

The keyboard controller performs debouncing on inputs and maintains a 10-byte FIFO to store key press and release events, capable of storing up to 10 keys with overflow recycling functionality. The interrupt (INT) output can be configured to trigger immediately upon key press or release, or at the maximum rate. The device also includes a CAD_INT pin to indicate detection of CTRL-ALT-DEL (i.e., 1, 11, 21) key operations.

Features of the TCA8418EYFPR

Operating voltage range: 1.65 V to 3.6 V  

±15 kV human body model high-voltage electrostatic discharge (ESD) protection (GPIO pins)  

Supports connecting 80 buttons using 18 GPIO pins  

Supports QWERTY keyboard operations and GPIO expansion  

Low standby (idle) current consumption: 3 µA

Supports 1 MHz fast mode and I2C bus

10-byte FIFO for storing 10 button press and release operations

Open-drain low-level active interrupt output

Integrated 50 µs debounce time

Schmitt trigger action allows for slow inputs

Transition and improved switch noise immunity on SCL and SDA inputs: typical Vhys is 0.18 V at 1.8 V

Lock performance exceeds 200 mA, compliant with JESD 78, Class II

Very small package

WCSP (YFP): 2 mm × 2 mm; 0.4 mm pitch

Technical specifications of TCA8418EYFPR

Applications: PDA, portable audio/video, smartphones

Interface: I2C, 2-wire serial  

Voltage - Supply: 1.65 V to 3.6 V  

Package: 25-DSBGA  

Mounting type: Surface mount  

Applications for TCA8418EYFPR

Smartphones

Tablets

Human-machine interface panels

GPS devices

MP3 players

Digital cameras

• 1.Is the inventory and price seen on the platform accurate?

  A: all online goods on the shelves can be ordered online, but considering the large liquidity of spot inventory, it is not possible to achieve 100% accuracy at present. In case of any abnormality, you can contact our company online and give the corresponding solution.

• 2.Are all our products genuine?

  A: our self-supporting products are from cooperative domestic and foreign original factories or authorized agents, and the source can be traced to ensure the original and authentic products.

• 3.Can you provide the qualification certificate of the original factory or agent?

  A: at present, our self-employed brands TI，ST，ADI，NXP，LATTICE，CYPRESS，INFINEON，XILINX and other first-line brands. Other channels are the original factory and agency channels. If necessary, we can communicate and confirm according to the specific brand and model.

• 4.Can I make an inquiry through the company's website?

  A: You can inquire through the website, or by phone and email.

• 5.When can I deliver the goods after placing an order? How long will it take to get there?

  A: the delivery date is marked in most commodity information. You can estimate the delivery time of the commodity according to the delivery date. The specific arrival time depends on the warehouse where the commodity is located and the logistics mode you choose.

• 6.Can the company issue an invoice?

  A: you can issue ordinary invoices for individual users or special VAT invoices for enterprise users.