What is the Additional Feature ?

Name: PCAL6408AHKX
Brand: NXP USA Inc.
SKU: PCAL6408AHKX
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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NXP USA Inc. PCAL6408AHKX

Part No.:: PCAL6408AHKX

Manufacturer:: NXP USA Inc.

Package:: 16-XFQFN

Datasheet:: PCAL6408AHKX.pdf

Description:: IC I/O EXPANDER 8BIT I2C 16XQFN

In Stock:: 3195

Quantity:: Add To Cart

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PCAL6408AHKX Specifications

Package/Case:
16-XFQFN
Packaging:
Tape & Reel (TR),Cut Tape (CT),Digi-Reel®
Series:
Agile
ProductStatus:
Active
NumberofI/O:
8
Interface:
I²C, SMBus
InterruptOutput:
Yes
Features:
POR
OutputType:
Open Drain, Push-Pull
Current-OutputSource/Sink:
10mA, 25mA
ClockFrequency:
400 kHz
Voltage-Supply:
1.65V ~ 5.5V
OperatingTemperature:
-40°C ~ 85°C
MountingType:
Surface Mount

PCAL6408AHKX this integrated circuit is available in factory sealed anti static packs. at icwhale.com. Please read product page below detail information. including PCAL6408AHKX 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 PCAL6408AHKX 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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PCAL6408AHKX information

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PCAL6408AHKX Typical application Circuitry

PCAL6408AHKX

PCAL6408AHKX represents a variant within the PCAL6408A family of low-voltage, 8-bit General Purpose I/O (GPIO) expanders with I²C-bus/SMBus interface options, designed by NXP Semiconductors.

Application Scenarios

An ideal application for the PCAL6408AHKX is in wearable technology, such as smartwatches or fitness trackers, where it can be used to interface additional sensors or control elements like LEDs or buttons, without necessitating a larger, more power-consuming microcontroller.

Parameter Features

- Wide Voltage Range: Operates effectively across a broad range of voltages from 1.65V to 5.5V, accommodating diverse power supply scenarios.

- I²C/SMBus Interface: Incorporates a Fast-mode Plus (Fm+) I²C-bus interface, enabling higher throughput and a greater number of connectable devices on the bus.

- Configurable Ports: Each of the eight I/O ports can be individually set as an input or output, providing significant flexibility in interfacing with external devices.

- Interrupt Output: Features an interrupt output pin (INT), which can be programmed to trigger on input changes, allowing for efficient event-driven programming.

Detailed Circuit Connection - Smartwatch Sensor Interface

1. I²C Communication Setup

Primarily, connect the SDA (Serial Data) and SCL (Serial Clock) pins of the PCAL6408AHKX to the corresponding I²C bus lines on the smartwatch's microcontroller. This facilitates bidirectional data exchange between the I/O expander and the microcontroller.

2. Power Supply and Grounding

Crucially, supply power within the acceptable range (1.65V to 5.5V) to the VDD pin of PCAL6408AHKX, and connect the VSS pin to the system ground. This ensures stable operation of the expander.

3. Sensor Integration

Strategically, configure pins P0 to P3 of PCAL6408AHKX as inputs for connecting environmental sensors, such as temperature or humidity sensors. Ensure that the sensors' output signal levels are compatible with the expander's input voltage range.

4. Control Outputs

Effectively, designate pins P4 to P7 as outputs for controlling external elements like LEDs or vibration motors. Use these pins to drive transistors or MOSFETs that in turn control these power-demanding components.

Circuit Design Considerations

- Power Efficiency: Especially critical in wearable technology, designers must optimize the power consumption of PCAL6408AHKX and the overall circuit to extend battery life.

- I²C Bus Integrity: Maintain the integrity of the I²C bus by properly placing pull-up resistors and ensuring that the bus capacitance does not exceed recommended values, to uphold reliable communication.

- Device Addressing: Given the PCAL6408AHKX utilizes I²C for communication, it's imperative to correctly set the device's hardware address to avoid conflicts on the bus, especially in systems with multiple I²C devices.

- EMI and Noise Considerations: In the compact environment of wearable devices, careful attention should be paid to minimizing electromagnetic interference and signal noise, through judicious circuit layout and grounding practices.

Incorporating these considerations, designers can effectively utilize the PCAL6408AHKX to enhance the functionality and flexibility of microcontroller-based systems, particularly in space-constrained and power-sensitive applications such as wearable technology.

PCAL6408AHKX FAQ

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3. Are the PCAL6408AHKX price and inventory displayed accurate?

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6. What is the process for return or replacement of PCAL6408AHKX?

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 PCAL6408AHKX we delivered, we will accept the replacement or return of the PCAL6408AHKX 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 PCAL6408AHKX.

(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