The only official website & email suffix are and
WIN SOURCE does not have any other Company Name or Website.


Part No FSA551UCX
Manufacturer ON Semiconductor
Catalog Interface - Analog Switches - Special Purpose
Description IC AUDIO SWITCH DUAL SPST 9WLCSP / Audio Switch IC 2 Channel 9-WLCSP (1.22x1.22)

Shipping Information

Shipped from HK warehouse
Expected Shipping Date
Ship today if order in (HKT)
Supplier Lead-Time Call for availability
Estimate shipping fee
Enter your destination to get a shipping estimate
Estimate Shipping Fee
Pricing & Ordering $0.7661 Historical reference price : is the price that a customer announces that it is willing to pay for this component in the previous period, only for reference.
Unit Price
Ext. Price
* The above prices does not include taxes and freight rates, which will be calculated on the order pages.
Availability: 2,260 pieces
MOQ: 40 pcs
Order Increment : 1 pcs
*Need More Quantity? *Request a Bulk Quantity Quotation?
Estimate shipping
Enter your destination to get a shipping estimate


Products specifications

Category Integrated Circuits (ICs) - Interface - Analog Switches - Special Purpose
Mfr ON Semiconductor
Package Tape & Reel
Product Status Obsolete
Applications Audio
Switch Circuit SPST
Number of Channels 2
On-State Resistance (Max) 600mOhm
Voltage - Supply, Single (V+) 1.5V ~ 3V
-3db Bandwidth 240MHz
Temperature Range - Operating -40°C ~ 85°C (TA)
Mounting Type Surface Mount
Package / Case 9-UFBGA, WLCSP
Supplier Device Package 9-WLCSP (1.22x1.22)
Base Product Number FSA551
Standard Package 3,000 pcs
MSL Level 1 (Unlimited)
REACH Status REACH Unaffected
HTSUS 8542.39.0001
Win Source Part Number 848956-FSA551UCX
Fake Threat In the Open Market 60pct.


ON Semiconductor FSA551UCX - A High-Performance Switch for Mobile Applications

The FSA551UCX from ON Semiconductor is a state-of-the-art High-Speed USB 2.0 (480 Mbps) switch with an integrated Universal Serial Bus (USB) charger detection feature. Designed to meet the demands of modern mobile and consumer electronics, this compact and efficient switch is housed in an ultra-small UMLP package, making it an ideal choice for space-constrained applications.

The FSA551UCX is engineered to facilitate multiplexing between a USB port and other outputs, such as a UART or audio signals, providing versatility in various design configurations. Its advanced charger detection capability allows for automatic recognition of connected devices, supporting the USB Battery Charging Specification 1.2, which is critical for ensuring quick and efficient charging of portable devices.

With a low On-Capacitance (CON) and On-Resistance (RON), the switch ensures minimal signal distortion and attenuation, thus maintaining signal integrity even at high-speed data transmission rates. This makes the FSA551UCX an excellent choice for applications requiring high-speed data transfer, such as smartphones, tablets, and other USB-enabled devices.

The device also features an Over-Voltage Protection (OVP) circuit, which protects the system from voltage spikes, and an ESD protection circuit, which safeguards against electrostatic discharge events. These protective features enhance the reliability and longevity of the end product, providing peace of mind for both designers and consumers.

ON Semiconductor's commitment to environmental sustainability is evident in the FSA551UCX, which is fully compliant with current environmental standards such as RoHS and Green Product requirements. This ensures that the product not only meets the technical demands of modern electronics but also aligns with the global movement towards environmentally responsible manufacturing practices.

In summary, the FSA551UCX from ON Semiconductor is a versatile, high-performance switch that is perfectly suited for the fast-paced evolution of mobile and consumer electronics. Its integrated features and protective circuits make it a robust and reliable choice for designers looking to enhance the user experience of their products.

Contact Us

You May Also Be Interested in

Top Sellers

Win-Source Footer Image

Cookie Consent Preference Center

When you visit any of our websites, it may store or retrieve information on your browser, mostly in the form of cookies. This information might be about you, your preferences, or your device and is mostly used to make the site work as you expect it to. The information does not usually directly identify you, but it can give you a more personalized experience. Because we respect your right to privacy, you can choose not to allow some types of cookies. Click on the different category headings to find out more and manage your preferences. Please note, blocking some types of cookies may impact your experience of the site and the services we are able to offer.

Manage Consent Preferences

Always Active

These cookies are necessary for the website to function and cannot be switched off in our systems. They are usually only set in response to actions made by you which amount to a request for services, such as setting your privacy preferences, logging in or filling in forms. You can set your browser to block or alert you about these cookies, but some parts of the site will not then work. These cookies do not store any personally identifiable information.

These cookies allow us to count visits and traffic sources so we can measure and improve the performance of our site. They help us to know which pages are the most and least popular and see how visitors move around the site. All information these cookies collect is aggregated and therefore anonymous. If you do not allow these cookies we will not know when you have visited our site, and will not be able to monitor its performance.

These cookies enable the website to provide enhanced functionality and personalisation. They may be set by us or by third party providers whose services we have added to our pages. If you do not allow these cookies then some or all of these services may not function properly.

These cookies are used to make advertising messages more relevant to you and may be set through our site by us or by our advertising partners. They may be used to build a profile of your interests and show you relevant advertising on our site or on other sites. They do not store directly personal information, but are based on uniquely identifying your browser and internet device.