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KSZ8721BLI IC TXRX PHY 10/100 3.3V 48LQFP Interface - Drivers, Receivers, Transceivers

KSZ8721BLI IC TXRX PHY 10/100 3.3V 48LQFP Interface - Drivers, Receivers, Transceivers

Contact : Abby Zhang E-mail: WhatsApp: 0086 188 1790 2090 skype : ascoavi Item number :KSZ8721BLI Package: 48LQFP Packaging: 250pcs/tray Voltage - Supply: 3 V ~ 3.6 V Operating Temperature: -40°C ~ 85°C Mounting Type: Surface Mount

Product details


Best price KSZ8721BLI 3.3V Single Power Supply 10/100BASE-TX/FX MII Physical Layer Transceiver


 all integrated circuit/IC and electronic components from the largest independent distributor of China


Contact person : Abby   Zhang   skype : ascoavi   QQ:894663976  e-mail:  Cell phone : 86-188 1790 2090  WhatsApp: 0086 188 1790 2090 Wechat:zca18817902090



General Description
Operating with a 2.5V core to meet low-voltage and lowpower
requirements, the KS8721BL and KS8721SL are
10BASE-T/100BASE-TX/FX Physical Layer Transceivers
that use MII and RMII interfaces to transmit and receive
data. They contain 10BASE-T Physical Medium
Attachment (PMA), Physical Medium Dependent (PMD),
and Physical Coding Sub-layer (PCS) functions. The
KS8721BL/SL also have on-chip 10BASE-T output
filtering. This eliminates the need for external filters and
allows a single set of line magnetics to be used to meet
requirements for both 100BASE-TX and 10BASE-T.
The KS8721BL/SL automatically configure themselves
for 100 or 10Mbps and full- or half-duplex operation,
using an on-chip auto-negotiation algorithm. They are the
ideal physical layer transceiver for 100BASE-TX/
10BASE-T applications.

• Single chip 100BASE-TX/100BASE-FX/10BASE-T
physical layer solution
• 2.5V CMOS design; 2.5/3.3V tolerance on I/O
• 3.3V single power supply with built-in voltage
regulator; Power consumption <340mW (including
output driver current)
• Fully compliant to IEEE 802.3u standard
• Supports MII and Reduced MII (RMII)
• Supports 10BASE-T, 100BASE-TX, and 100BASE-FX
with Far_End_Fault Detection
• Supports power-down and power-saving modes
• Configurable through MII serial management ports or
via external control pins

Features (continued)
• Supports auto-negotiation and manual selection for
10/100Mbps speed and full-/half-duplex modes
• On-chip, built-in, analog front-end filtering for both
100BASE-TX and 10BASE-T
• LED outputs for link, activity, full-/half-duplex, collision,
and speed
• Supports back-to-back, FX to TX for media converter
• Supports MDI/MDI-X auto-crossover

KS8721BL is a drop-in replacement for the KS8721BT
in the same footprint
• KS8721SL is a drop-in replacement for the KS8721B
in the same footprint
• Commercial Temperature Range: 0o
C to +70o
• Industrial Temperature Range: –40oC to +85oC
• Available in 48-pin SSOP and LQFP







1.We will ship the items within 2 working days after the payment is reached.


2.We can ship to you by UPS/ DHL/TNT/EMS/Fedex. Pls contact us directly and we will use your

preferred ways. For the Countries & Regions where EMS cannot deliver,pls choose other shipping ways.


3.We are not responsible for any accidents, delays or other issues that are the responsibility of the shipping service.


4.Any import fees or charges are the buyer's responsibility.



1.T/T in advance


3.western union gram


6.Net 1-30  (only old customer)

Company Information 

Asco Technology Co.,Limited is a leading distributor of  Diode and transistor  electronic components worldwide, dealing with semiconductors and transistors. We offer products for not only components currently in production, but also for obsolete parts. We strive to provide exemplary quality products and competitive pricing to all our customers overseas , also we do our best to provide solutions to all customers needs. We hope to get to know with more international friends sincerely, mutual reciprocity and mutual benefit , close cooperation and prosperity of creating together.






1)The part we quote are 100% original quality assurance in stock,we also can offer samples for not have minimum quantity limited.

2)Have a high reputation in our cooperate company and factory.


3)Our payment term include: T/T, West Union or paypal.


4)Fast delievery .1-2days .A large of stock to offer .

5)We are Alibaba memeber  nearly 8years .

                                                 Our Team

Our Services


Refund & Replacement



 1.We provide 365 days warranty.


2.If the item you purchase from our store are not of perfected quality, that is they don't work electronically to   manufacturers specifications, simply return them to us for replacement or refund.


3.If the items is defective, pls notify us within 3 days of delivery.


4.Any items must be returned in their original condition to qualify for a refund or replacement.


5.The buyer is responsible for all the shipping cost incurre   


Buyer Feedback



Q & A

1. Q: What is your products quality ?
    A: We offer all parts are new and original .
2. Q:What is your lead time?
    A: 1-2 days. we have own warehouse and stock in large quantity.
3. Q: What is the shipping port?
    A: We ship the goods via Port of HONGKONG or Shenzhen
4. Q: What is your payment terms?
    A: T/T, Paypal, Western union, Money Gram, L/C.
5.Q: What’s your advantage?
        1. Competitive price.
        2. Good quality control.
        3. Fast production and delivery
        4. Low MOQ.
        5. Professional sales and good after-sale service

Contact us

Asco Technology Co.,Limited

T:+0086-18817902090  Fax :86-755-82791035 

WhatsApp:0086-188 1790 2090 skype :ascoavi E-mail:

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Address: RM4311 , 43/F , SEG Plaza , Huaqiang North RD , Futian District , SZ ,GD , CN 518000
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