Please refer to the English Version as our Official Version.

Europe: France~~(Français)~~ Germany~~(Deutsch)~~ Italy~~(Italia)~~ Russian~~(русский)~~ Poland~~(polski)~~ Czech~~(Čeština)~~ Luxembourg~~(Lëtzebuergesch)~~ Netherlands~~(Nederland)~~ Iceland~~(íslenska)~~ Hungarian~~(Magyarország)~~ Spain~~(español)~~ Portugal~~(Português)~~ Turkey~~(Türk dili)~~ Bulgaria~~(Български език)~~ Ukraine~~(Україна)~~ Greece~~(Ελλάδα)~~ Israel~~(עִבְרִית)~~ Sweden~~(Svenska)~~ Finland~~(Svenska)~~ Finland~~(Suomi)~~ Romania~~(românesc)~~ Moldova~~(românesc)~~ Slovakia~~(Slovenská)~~ Denmark~~(Dansk)~~ Slovenia~~(Slovenija)~~ Slovenia~~(Hrvatska)~~ Croatia~~(Hrvatska)~~ Serbia~~(Hrvatska)~~ Montenegro~~(Hrvatska)~~ Bosnia and Herzegovina~~(Hrvatska)~~ Lithuania~~(lietuvių)~~ Spain~~(Português)~~ Switzerland~~(Deutsch)~~ United Kingdom~~(English)~~

Asia/Pacific: Japan~~(日本語)~~ Korea~~(한국의)~~ Thailand~~(ภาษาไทย)~~ Malaysia~~(Melayu)~~ Singapore~~(Melayu)~~ Vietnam~~(Tiếng Việt)~~ Philippines~~(Pilipino)~~

Africa, India and Middle East: United Arab Emirates~~(العربية)~~ Iran~~(فارسی)~~ Tajikistan~~(فارسی)~~ India~~(हिंदी)~~ Madagascar~~(malaɡasʲ)~~

South America / Oceania: New Zealand~~(Maori)~~ Brazil~~(Português)~~ Angola~~(Português)~~ Mozambique~~(Português)~~

North America: United States~~(English)~~ Canada~~(English)~~ Haiti~~(Ayiti)~~ Mexico~~(español)~~

Home Products Integrated Circuits (ICs)Interface - I/O Expanders~~PCA9557D~~

Image may be representation.
See specifications for product details.

~~Favorite~~

EXPRESS OPTION

Payment method

PCA9557D - Texas Instruments

Name: Texas Instruments PCA9557D
Brand: Texas Instruments
SKU: PCA9557D
Availability: InStock
Rating: 5 (3 reviews)

Manufacturer Part Number: PCA9557D

Manufacturer: Texas Instruments

Allelco Part Number: 32D-PCA9557D

Warranty: 1 Year Allelco Warranty - Find out more

Parts Description: IC XPNDR 400KHZ I2C SMBUS 16SOIC

Package: 16-SOIC

Data sheet: 1.PCA9557D.pdf ...

PCN Design/Specification
Datasheet Update 25/Jun/2014.pdf

HTML Datasheet
PCA9557 Datasheet.pdf

PCN Packaging
Reel 10/Jul/2018.pdf

RoHs Status: ROHS3 Compliant

~~Compare~~

Our certification

In stock: 53750

EXPRESS OPTION

Payment method

Our certification

Specifications

PCA9557D Tech Specifications
Texas Instruments - PCA9557D technical specifications, attributes, parameters and parts with similar specifications to Texas Instruments - PCA9557D

Product Attribute	Attribute Value
Manufacturer	Texas Instruments
Voltage - Supply	2.3V ~ 5.5V
Supplier Device Package	16-SOIC
Series	-
Package / Case	16-SOIC (0.154", 3.90mm Width)
Package	Tube
Output Type	Open Drain, Push-Pull
Operating Temperature	-40°C ~ 85°C

Product Attribute	Attribute Value
Number of I/O	8
Mounting Type	Surface Mount
Interrupt Output	No
Interface	I²C, SMBus
Features	POR
Current - Output Source/Sink	10mA, 25mA
Clock Frequency	400 kHz
Base Product Number	PCA9557

Environmental & Export Classifications

ATTRIBUTE	DESCRIPTION
RoHs Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected
ECCN	EAR99
HTSUS	8542.39.0001

Parts Introduction

Manufacturer Part Number

PCA9557D

Manufacturer

Texas Instruments

Introduction

The PCA9557D is a versatile 8-bit I/O expander with I2C-bus/SMBus interface. It provides a simple and cost-effective solution for expanding the number of available digital input/output (I/O) ports in a system.

Product Features and Performance

8-bit I/O expander with I2C-bus/SMBus interface

Supports up to 400 kHz clock frequency

Operating voltage range: 2.3V to 5.5V

Wide operating temperature range: -40°C to 85°C

Power-on reset (POR) function

Open-drain and push-pull output drivers

Output source/sink current: 10mA/25mA

Surface mount 16-SOIC package

Product Advantages

Versatile I/O expansion solution

Simple and cost-effective interface

Wide operating voltage and temperature ranges

Robust output driver options

Key Reasons to Choose This Product

Easily expand digital I/O capabilities of your system

Seamless integration with I2C-bus/SMBus infrastructure

Reliable and energy-efficient performance

Suitable for a wide range of applications

Quality and Safety Features

Robust industrial-grade design

Extensive testing and quality control measures

Compatibility

Compatible with I2C-bus and SMBus protocols

Application Areas

Industrial automation

Home and building automation

Consumer electronics

Embedded systems

Product Lifecycle

This product is currently in Obsolete status. There are no direct equivalent or alternative models available. Customers are advised to contact our website's sales team for more information on available options or suitable replacement products.

Parts with Similar Specifications

The three parts on the right have similar specifications to Texas Instruments PCA9557D

Product Attribute
Part Number	PCA9557DB	PCA9557D/DG,118	PCA9557DR	PCA9557DBR
Manufacturer	Texas Instruments	NXP USA Inc.	Texas Instruments	Texas Instruments
Package / Case	-	196-LFBGA	16-DIP (0.300', 7.62mm)	64-VFQFN Exposed Pad
Interface	-	-	-	-
Current - Output Source/Sink	-	-	-	-
Package	-	Tape & Reel (TR)	Tube	Tape & Reel (TR)
Supplier Device Package	-	196-NFBGA (12x12)	16-PDIP	64-VQFN (9x9)
Series	-	-	-	-
Clock Frequency	-	-	-	-
Output Type	-	Current - Unbuffered	Voltage - Buffered	-
Features	-	-	-	Simultaneous Sampling
Operating Temperature	-	-40°C ~ 85°C	0°C ~ 70°C	-40°C ~ 85°C
Number of I/O	-	-	-	-
Interrupt Output	-	-	-	-
Base Product Number	-	DAC34H84	MAX500	ADS62P42
Voltage - Supply	-	-	-	-
Mounting Type	-	Surface Mount	Through Hole	Surface Mount

PCA9557D Datasheet PDF

Download PCA9557D pdf datasheets and Texas Instruments documentation for PCA9557D - Texas Instruments.

PCN Design/Specification: Datasheet Update 25/Jun/2014.pdf
HTML Datasheet: PCA9557 Datasheet.pdf
PCN Packaging: Reel 10/Jul/2018.pdf

Customers Also Interested in

Recommended Products

Customer Reviews

Evaluation: 10 Articles

Jess***Jones

Apr 17, 2026

It offers good value for the price, and the specifications match the description. I’ve been using it for two days with no issues, and I’ll definitely buy it again if I need it in the future.
Mich***Smith

Apr 17, 2026

Shipping was on time, the component pins are neatly aligned, and I tested 10 of them with a multimeter—all readings were within the specified range. Highly recommended.
Aman***arris

Apr 3, 2026

It was great—the entire process, from placing the order to receiving the package, went very smoothly. The components were consistent, the price was fair, and I had a very pleasant shopping experience.
Mike***nch

Apr 3, 2026

Better than expected! The resistance and capacitance readings were spot-on, and it passed the test on the first try. The service was reliable, and the packaging was thoughtful—I highly recommend it.
Daic***K.

Mar 23, 2026

Very good. No issue after long time testing.
Kevi***.

Mar 17, 2026

Fast switching and stable output. Very satisfied with this IC
Daou***hekebkeb

Jun 16, 2024

I had a great experience purchasing items from Allelcoelec, I recommend
Uri ***al

Jun 19, 2024

Good comunication,
Transpnt regarding the process and price.
Yaqu***l Ali

Jun 19, 2024

Providing reasonable prices, regular follow-up of orders, providing accurate and regular invoices, timely delivery of goods, excellent customer service and providing original goods and best quality materials.
Lea ***

Jun 19, 2024

Morrey was very helpful and right on top of things!
He replied quickly to my RFQ. He was very courteous and professional.

Write a Review

Your Email address will not be published.

Shipment

Delivery Time

In-stock items can be shipped within 24 hours. Some parts will be arranged for delivery within 1-2 days from the date all items arrive at our warehouse. And Allelco ships order once a day at about 17:00, except Sunday. Once the goods are shipped, the estimated delivery time depends on the shipping methods and Delivery destination. The table below shows are the logistic time for some common countries.

Delivery Cost

Use your express account for shipment if you have one.
Use our account for the shipment. Refer to the table below for the approximate charges.

(Different time frame / countries / package size has different price.)

Delivery Method

Global Common Shipment by DHL / UPS / FedEx / TNT / EMS / SF we support.
Others more shipping ways, please get in touch with your customer manager.

Common Countries Logistic Time Reference
Region	Country	Logistic Time(Day)
America	United States	5
America	Brazil	7
Europe	Germany	5
	United Kingdom	4
	Italy	5
Oceania	Australia	6
Oceania	New Zealand	5
Asia	India	4
Asia	Japan	4
Middle East	Israel	6

DHL & FedEx Shipment Charges Reference
Shipment charges(KG)	Reference DHL(USD$)
0.00kg-1.00kg	USD$30.00 - USD$60.00
1.00kg-2.00kg	USD$40.00 - USD$80.00
2.00kg-3.00kg	USD$50.00 - USD$100.00

Note:: The above table is for reference only. There may have some data bias for the uncontrollable factors.
Contact us if you have any questions.

Payment Support

The payment method can be chosen from the methods shown below: Wire Transfer (T/T, Bank Transfer), Western Union, Credit card, PayPal.

Your Faithful Supply Chain Partner -

Efficient Supply Management
Cost-Saving Procurement
Fast Sourcing & Delivery

Contact us if you have any questions.

Phone
+00852 9146 4856
Email
info@allelco.com

Certifications & Memberships

PCA9557D

Texas Instruments
32D-PCA9557D

Want a better price? Add to Cart and Submit RFQ now, we'll contact you immediately.

The Blogs Hot Parts Change Language News Site map

Headquarters Address:
Room C 13/F Harvard Commercial Building
105-111 Thomson Road Wan Chai
HongKong

Service Tel: +852-91464856
Service Email: info@allelco.com

Follow us

0 RFQ

Shopping cart (0 Items)

It is empty.

Submit RFQ

Compare List (0 Items)

It is empty.

Feedback

Your feedback matters! At Allelco, we value the user experience and strive to improve it constantly.
Please share your comments with us via our feedback form, and we'll respond promptly.
Thank you for choosing Allelco.

Please refer to the English Version as our Official Version.Return

PCA9557D - Texas Instruments

Specifications

Environmental & Export Classifications

Parts Introduction

Manufacturer Part Number

Manufacturer

Introduction

Product Features and Performance

Product Advantages

Key Reasons to Choose This Product

Quality and Safety Features

Compatibility

Application Areas

Product Lifecycle

Parts with Similar Specifications

PCA9557D Datasheet PDF

Customers Also Interested in

Recommended Products

Customer Reviews

Evaluation: 10 Articles

It offers good value for the price, and the specifications match the description. I’ve been using it for two days with no issues, and I’ll definitely buy it again if I need it in the future.

Shipping was on time, the component pins are neatly aligned, and I tested 10 of them with a multimeter—all readings were within the specified range. Highly recommended.

It was great—the entire process, from placing the order to receiving the package, went very smoothly. The components were consistent, the price was fair, and I had a very pleasant shopping experience.

Better than expected! The resistance and capacitance readings were spot-on, and it passed the test on the first try. The service was reliable, and the packaging was thoughtful—I highly recommend it.

Very good. No issue after long time testing.

Fast switching and stable output. Very satisfied with this IC

I had a great experience purchasing items from Allelcoelec, I recommend

Good comunication,Transpnt regarding the process and price.

Providing reasonable prices, regular follow-up of orders, providing accurate and regular invoices, timely delivery of goods, excellent customer service and providing original goods and best quality materials.

Morrey was very helpful and right on top of things!He replied quickly to my RFQ. He was very courteous and professional.

Write a Review

Shipment

Delivery Time

Delivery Cost

Delivery Method

Payment Support

Your Faithful Supply Chain Partner -

Contact us if you have any questions.

Certifications & Memberships

PCA9557D

Shopping cart (0 Items)

Compare List (0 Items)

Feedback

Please refer to the English Version as our Official Version.

Good comunication,
Transpnt regarding the process and price.

Morrey was very helpful and right on top of things!
He replied quickly to my RFQ. He was very courteous and professional.