What is the Additional Feature ?

Name: CAT9555YI
Brand: ON Semiconductor
SKU: CAT9555YI
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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

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ON Semiconductor CAT9555YI

Part No.:: CAT9555YI

Manufacturer:: ON Semiconductor

Package:: -

Datasheet:: CAT9555YI.pdf

Description:: PARALLEL I/O PORT, 16-BIT

In Stock:: 2171

Quantity:: Add To Cart

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CAT9555YI Specifications

Package/Case:
-
Packaging:
Bulk
Series:
*
ProductStatus:
Active
NumberofI/O:
-
Interface:
-
InterruptOutput:
-
Features:
-
OutputType:
-
Current-OutputSource/Sink:
-
ClockFrequency:
-
Voltage-Supply:
-
OperatingTemperature:
-
MountingType:
-

CAT9555YI this integrated circuit is available in factory sealed anti static packs. at icwhale.com. Please read product page below detail information. including CAT9555YI 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 CAT9555YI to optimize the supply chain (including cross references, life-cycle, parametric, counterfeit risk, obsolescence managements forecasts), please contact to our Tech-supports team.

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CAT9555YI information

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CAT9555YI Typical application Circuitry

CAT9555YI

The CAT9555YI is a 16-bit I/O expander equipped with an I²C interface. It is designed to extend the number of input/output pins in microcontroller-based systems, providing additional GPIOs for various applications.

Applications: This chip is commonly used in scenarios requiring extra I/O pins, such as in keypad interfaces, LED control panels, and sensor array management in embedded systems, consumer electronics, and industrial devices.

Key Characteristics: The CAT9555YI operates with a voltage range from 2.3V to 5.5V, making it compatible with both 3.3V and 5V logic levels. It features 16 individually configurable I/O pins, an interrupt output for input change notification, and supports I²C communication speeds up to 400 kHz.

Application Scenario: Controlling an LED Array

1. Power Supply Connection: Attach VDD (pin 24) to a 3.3V source. Place decoupling capacitors close to this pin to ensure smooth power delivery and minimize noise.

2. Establishing Ground: Connect the circuit's common ground to each of the ground pins (1, 12, 13). In order to reduce noise and provide a reliable reference point, this step is crucial.

3. I²C Communication Setup: Connect SDA (pin 23) and SCL (pin 22) to the respective data and clock lines of the microcontroller's I²C interface. These connections are crucial for programming and controlling the CAT9555YI.

4. LED Array Configuration: Set up P0-P15 (pins 2-9 and 14-21) as outputs to drive the LEDs in the array. This allows individual control of each LED for creating patterns or displaying information.

5. Displacement Setup: Connect pin 10 (INT) to a microcontroller interrupt pin. Because of this, the microcontroller can react to input state changes-like button presses in an interactive LED display-quickly.

6. Current Limiting Resistors: Include current-limiting resistors in series with each LED to prevent excessive current flow and protect the LEDs and the CAT9555YI.

Design Considerations

- I²C Addressing: Use the A0-A2 address pins (pins 11, 5, 6) to set a unique I²C address for the CAT9555YI, avoiding conflicts with other devices on the bus.

- I²C Line Integrity: Ensure proper routing and shielding of the I²C lines to prevent interference and signal degradation, maintaining reliable communication.

- LED Current Management: Calculate the appropriate values for the current-limiting resistors based on the LED specifications and the desired brightness to ensure safe operation.

- Thermal Considerations: Monitor the heat dissipation of the circuit, especially if driving a large number of LEDs, and implement heat sinks or thermal management techniques if necessary.

In summary, the CAT9555YI is a versatile I/O expander that can significantly enhance the capabilities of microcontroller-based systems, particularly in applications requiring additional GPIOs such as LED array control. Careful attention to I²C addressing, signal integrity, current management, and thermal considerations is crucial for successful circuit design with this chip.

CAT9555YI FAQ

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3. Are the CAT9555YI price and inventory displayed accurate?

The price and inventory of CAT9555YI fluctuates frequently and cannot be updated in time, it will be updated periodically within 24 hours. And, our quotation usually expires after 5 days.

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6. What is the process for return or replacement of CAT9555YI?

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 CAT9555YI we delivered, we will accept the replacement or return of the CAT9555YI 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 CAT9555YI.

(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