What is the Additional Feature ?

Name: PCAL9555APW118
Brand: NXP USA Inc.
SKU: PCAL9555APW118
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Any Feature, including a modified Existing Feature, that is not an Existing Feature.

Cart ( )

lmages are for reference only See Product Specifications

NXP USA Inc. PCAL9555APW118

Part No.:: PCAL9555APW118

Manufacturer:: NXP USA Inc.

Package:: -

Datasheet:: PCAL9555APW118.pdf

Description:: IC GPIO EXPANDER 24TSSOP

In Stock:: 3770

Quantity:: Add To Cart

For more detailed including pricing and shipping

: Quick response, quick quotation

: Flash shipment, no worries after sales

: Original channel, guarantee of the authentic products

Please send RFQ , we will respond immediately.

Purchase and inquiry

PCAL9555APW118 Specifications

Package/Case:
-
Packaging:
Bulk
Series:
*
ProductStatus:
Active
Type:
-
Applications:
-
MountingType:
-

PCAL9555APW118 this integrated circuit is available in factory sealed anti static packs. at icwhale.com. Please read product page below detail information. including PCAL9555APW118 price, data-sheet, in-stock availability, technical difficulties. Also. Quickly Enter the access of compare listing to find out replaceable electronic parts. If you want to retrieve comprehensive data for PCAL9555APW118 to optimize the supply chain (including cross references, life-cycle, parametric, counterfeit risk, obsolescence managements forecasts), please contact to our Tech-supports team.

Purchase in icwhale.com

There is no doubt that you may place an order without registering to icwhale.com.

We strongly suggest you sign in our shop before purchasing as you can track your order real-time tracking.

Means of Payment in icwhale.com

For your convenience, we support multiple payment methods in USD, including PayPal, Credit Card, wire transfer. and Alipay.

RFQ (Request for Quotations) in icwhale.com

It is recommended to acquire for quotations to get the latest prices and inventories about the parts.

Our sales will reply to your request by email within 24 hours.

Warm reminder

1. You'll receive an order information email in your email inbox. (Please remember to check the spam folder if you didn't hear from us).

2. Since inventories and prices may fluctuate to some extent, the sales manager is going to reconfirm the order and let you know if there are any updates.

Shipping & Handling

Shipping fee starts at $35, but some countries will exceed $35. For example (South Africa, Brazil, India, Pakistan, Israel, etc.)

The basic freight (for package ≤0.5kg or corresponding volume) depends on the time zone and countries.

Shipping Method

Currently, our products are shipped through DHL, FedEx, SF, UPS and China Post.

Order Tracking for International Orders

Once your order has been shipped, the tracking number will be sent to the email address registered to your account. This information can also be viewed when logged into your account in the "my account" page.

PCAL9555APW118 information

Views：

PCAL9555APW118 Typical application Circuitry

PCAL9555APW118

The PCAL9555APW118 is a 16-bit I/O expander with an I²C-bus interface and interrupt, designed to provide additional GPIOs for microcontrollers in systems where GPIOs are limited. It is particularly useful in applications requiring a large number of inputs or outputs, such as keypad interfaces, LED displays, and sensor networks.

Key Parameters and Features:

- 16-bit I/O Expansion: Enhances the GPIO capability of microcontrollers by adding 16 additional inputs or outputs.

- I²C Interface: Facilitates easy integration and communication with most microcontroller families, allowing for efficient control and configuration of the I/Os.

- Interrupt Output: Offers an interrupt output pin that can be configured to signal the microcontroller when input states change, improving system responsiveness.

- Polarity Inversion: Inputs can have their polarity inverted via software, increasing interface flexibility with different logic levels.

- Configurable I/Os: Each I/O can be independently configured as an input or output, providing versatility in application design.

Application Scenario - Keypad Interface for a Security System:

In a security system, the PCAL9555APW118 can be used to interface a large keypad with a microcontroller, providing a user interface for entering security codes or navigating system menus.

1. Power Supply Connection: Start by connecting the VDD pin to a 3.3V or 5V power source, ensuring that the power supply matches the logic level requirements of the microcontroller and keypad. This step is essential to the PCAL9555APW118's correct functionality.

2. System Grounding: Join the GND pin to the ground of the system. To keep the I/O expander operating steadily and reduce noise, a strong ground connection is necessary.

3. I²C Communication Setup: Join the microcontroller's SDA (Serial Data) and SCL (Serial Clock) pins to the appropriate I²C bus lines.

This connection is key for configuring and controlling the I/O ports of the PCAL9555APW118 through the microcontroller.

4. Keypad Connection: Wire the keypad's rows and columns to the I/O ports on the PCAL9555APW118. Configure the ports connected to the rows as outputs and the ports connected to the columns as inputs. This configuration allows the microcontroller to detect key presses by setting each row high in sequence and reading the column inputs.

5. Interrupt Configuration: Attach the microcontroller's INT pin to an interrupt-capable GPIO. This enables the PCAL9555APW118 to signal the microcontroller immediately when a key is pressed, reducing the need for constant polling of the keypad state.

6. Circuit Design Considerations: When designing the circuit, take into account the electrical characteristics of the keypad, ensuring that the current requirements do not exceed what the PCAL9555APW118 can handle. Additionally, implement debounce logic in software to handle the mechanical bouncing of the keys. Finally, consider the layout and routing of the I²C bus to minimize interference and ensure reliable communication.

Using the PCAL9555APW118 in a security system's keypad interface allows for efficient and reliable user input handling, significantly expanding the microcontroller's I/O capabilities. By carefully managing power supply connections, grounding, I²C communication, keypad integration, and addressing design challenges such as electrical compatibility, interrupt handling, and signal integrity, developers can create sophisticated, user-friendly security systems leveraging the functionality of the PCAL9555APW118.

PCAL9555APW118 FAQ

1. How to order PCAL9555APW118 on icwhale.com?

Currently, icwhale.com only provide peer-to-peer order processing. While you submit the RFQ, our professional agent will contact you with the competitive prices in the global market, and our agent will prompt you to finish the order if you accept our offers.

2. How does icwhale.com guarantee that PCAL9555APW118 is from the original manufacturer or authorized agents?

We have a professional and experienced quality control team to strictly verify and test the PCAL9555APW118. All suppliers must pass our qualification reviews before they can publish their products including PCAL9555APW118 on icwhale.com; we pay more attention to the channels and quality of PCAL9555APW118 products than any other customer. We strictly implement supplier audits, so you can purchase with confidence.

3. Are the PCAL9555APW118 price and inventory displayed accurate?

The price and inventory of PCAL9555APW118 fluctuates frequently and cannot be updated in time, it will be updated periodically within 24 hours. And, our quotation usually expires after 5 days.

4. What forms of payment are accepted?

Wire Transfer, PayPal, Alipay, Wechat, Credit Card, Western Union, MoneyGram, and Escrow are all acceptable.

Warm Tips: Some orders in certain payment forms may require handling fee.

5. How is the shipping arranged?

Customers can choose industry-leading freight companies, including DHL, UPS, FedEx, TNT, and Registered Mail. Shipping insurance is also available.

Once your order has been processed for shipment, our salesperson will send you an email advising you of the shipping status and tracking number.

Warm Tips: It may take up to 24 hours for the carriers to display tracking information. Usually, express delivery takes 3-5 days, and registered mail takes 25-60 days.

6. What is the process for return or replacement of PCAL9555APW118?

All goods will implement Pre-Shipment Inspection (PSI), selected at random from all batches of your order to do a systematic inspection before arranging the shipment. If there is something wrong with the PCAL9555APW118 we delivered, we will accept the replacement or return of the PCAL9555APW118 only when all of the below conditions are fulfilled:

(1)Such as a deficiency in quantity, delivery of wrong items, and apparent external defects (breakage and rust, etc.), and we acknowledge such problems.

(2)We are informed of the defect described above within 90 days after the delivery of PCAL9555APW118.

(3)The PartNo is unused and only in the original unpacked packaging.

Two processes to return the products:

(1)Inform us within 90 days

(2)Obtain Requesting Return Authorizations