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PCA9555AHF

Name: PCA9555AHF
Brand: NXP
SKU: JT24-PCA9555AHF
Price: 0.0001 USD
Availability: InStock
Rating: 5 (1 reviews)

Low-voltage 16-bit I2C-bus I/O port with interrupt and weak pull-up

Manufacturer :	NXP Semiconductor
Package/Case :	QFN
Product Categories :	Interfaces ; I2C, SPI, Serial Interface Devices ; I2C General Purpose I/O
Datasheet:	PCA9555AHF Datasheet (PDF)
RoHs Status:	Lead free / RoHS Compliant
In-stock:	1346

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PCA9555AHF Product Details

The PCA9555AHF is a low-voltage 16-bit General Purpose Input/Output (GPIO) expanderwith interrupt and weak pull-up resistors for I²C-bus/SMBus applications. NXP I/Oexpanders provide a simple solution when additional I/Os are needed while keepinginterconnections to a minimum, for example, in ACPI power switches, sensors, pushbuttons, LEDs, fan control, etc.

In addition to providing a flexible set of GPIOs, the wide VDD range of 1.65 V to 5.5 Vallows the PCA9555AHF to interface with next-generation microprocessors andmicrocontrollers where supply levels are dropping down to conserve power.

The PCA9555AHF contains the PCA9555 register set of four pairs of 8-bit Configuration,Input, Output, and Polarity Inversion registers.

The PCA9555AHF is a pin-to-pin replacement to the PCA9555 and other industry-standarddevices. A more fully featured device, the PCAL9555A, is available with Agile I/Ofeatures. See the respective data sheet for more details.

The PCA9555AHF open-drain interrupt (INT) output is activated when any input state differsfrom its corresponding Input Port register state and is used to indicate to the systemmaster that an input state has changed.

INT can be connected to the interrupt input of a microcontroller. By sending an interruptsignal on this line, the remote I/O can inform the microcontroller if there is incoming dataon its ports without having to communicate via the I²C-bus. Thus, the PCA9555AHF canremain a simple slave device.

The device outputs have 25 mA sink capabilities for directly driving LEDs while consuminglow device current.

The power-on reset sets the registers to their default values and initializes the device statemachine.

All input/output pins have weak pull-up resistors connected to them to eliminate externalcomponents.

Three hardware pins (A0, A1, A2) select the fixed I²C-bus address and allow up to eightdevices to share the same I²C-bus/SMBus.

Feature

I²C-bus to parallel port expander
Operating power supply voltage range of 1.65 V to 5.5 V
Low standby current consumption:
- 1.5 μA (typical at 5 V VDD)
- 1.0 μA (typical at 3.3 V VDD)
Schmitt-trigger action allows slow input transition and better switching noise immunityat the SCL and SDA inputs:
- Vhys = 0.10 x VDD (typical)
5 V tolerant I/Os
Open-drain active LOW interrupt output (INT)
400 kHz Fast-mode I²C-bus
Internal power-on reset
Power-up with all channels configured as inputs with weak pull-up resistors
No glitch on power-up
Latched outputs with 25 mA drive maximum capability for directly driving LEDs
Latch-up performance exceeds 100 mA per JESD78, Class II
ESD protection exceeds JESD22:
- 2000 V Human Body Model (A114-A)
- 1000 V Charged-Device Model (C101)
Packages offered: TSSOP24, HWQFN24

PCA9555AHF Block Diagram
(Picture: Diagram)

Technical Parameters

Manufacturer
NXP
Packing
Tape & Reel (TR)/Cut Tape (CT)/Tray/Tube
RoHs Status
Lead free / RoHS Compliant
Package/Case
QFN

PCA9555AHF Datasheet

PCA9555A NXP Technical Data

Download

PCA9555AHF Equivalent Parts

For the PCA9555AHF component, you may consider these replacement and alternative parts.

Models	Manufacturer	Package/Case	Description
PCA9555AHT

PCA9555AHF Related Products

Ratings and Reviews (1)

5 / 5

5 Stars 100%
4 Stars 0%
3 Stars 0%
2 Stars 0%
1 Stars 0%

**lber***

2019-08-18

merce conforme spedizione velocissima consigliato!!!

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Q: How does Jotrin guarantee that PCA9555AHF is the original manufacturer or agent of NXP?: We have a professional business development department to strictly test and verify the qualifications of NXP original manufacturers and agents. All NXP suppliers must pass the qualification review before they can publish their PCA9555AHF devices; we pay more attention to the channels and quality of PCA9555AHF products than any other customer. We strictly implement supplier audits, so you can purchase with confidence.
Q: How to find the detailed information of PCA9555AHF chips? Including NXP original factory information, Interfaces ; I2C, SPI, Serial Interface Devices ; I2C General Purpose I/O application, PCA9555AHF pictures?: You can use Jotrin's intelligent search engine, or filter by Interfaces ; I2C, SPI, Serial Interface Devices ; I2C General Purpose I/O category, or find it through NXP Semiconductor Information page.
Q: Are the NXP's PCA9555AHF price and stock displayed on the platform accurate?: The NXP's inventory fluctuates greatly and cannot be updated in time, it will be updated periodically within 24 hours. After submitting an order for PCA9555AHF, it is recommended to confirm the order with Jotrin salesperson or online customer service before payment.
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Q: What is the process for returns or replacement of PCA9555AHF?: 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 PCA9555AHF we delivered, we will accept the replacement or return of the PCA9555AHF 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 PCA9555AHF.
(3)The PCA9555AHF is unused and only in the original unpacked packaging.
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(1)Inform us within 90 days
(2)Obtain Requesting Return Authorizations
More details about return electronic components please see our Return & Change Policy.
Q: How to contact us and get support, such as PCA9555AHF datasheet pdf, PCA9555A pin diagram?: Need any After-Sales service, please feel free contact us: sales@jotrin.com

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