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Renesas 1894K-40LF


Ovaga Certification

Brands: Renesas Technology Corp

Mfr.Part #: 1894K-40LF

Datasheet: 1894K-40LF Datasheet (PDF)

Package/Case: 40-VFQFN

Product Type: Interface ICs

RoHS Status:

Stock Condition: 3084 pcs, New Original

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Please submit RFQ for 1894K-40LF or email to us: Email: [email protected], we will contact you within 12 hours.

1894K-40LF General Description

The IDT1894-40 is a low-power, physical-layer device (PHY) that supports the ISO/IEC 10Base-T and 100Base-TX Carrier-Sense Multiple Access/Collision Detection (CSMA/CD) Ethernet standards, ISO/IEC 8802-3. The IDT1894-40 is intended for MII, Node applications that require the Auto-MDIX feature that automatically corrects crossover errors in plant wiring. The IDT1894-40 incorporates Digital-Signal Processing (DSP) control in its Physical-Medium Dependent (PMD) sub layer. As a result, it can transmit and receive data on unshielded twisted-pair (UTP) category 5 cables with attenuation in excess of 24 dB at 100MHz. With this IDT-patented technology, the IDT1894-40 can virtually eliminate errors from killer packets. The IDT1894-40 provides a Serial-Management Interface for exchanging command and status information with a Station-Management (STA) entity. The IDT1894-40 Media-Dependent Interface (MDI) can be configured to provide either half- or full-duplex operation at data rates of 10 Mb/s or 100Mb/s. In addition, the IDT1894-40 includes a programmable interrupt output function. This function consists of a digital output pin, an interrupt control register, a set of interrupt status register bits and a corresponding set of interrupt enable bits, and a pre-defined set of events which can be assigned as one of the interrupt sources. The purpose of this function is to notify the host of this PHY device when certain event happens via interrupt (the logic level on interrupt output pin going low or going high) instead of polling by the host. The events that could be used to generate interrupts are: receiver error, Jabber, page received, parallel detect fault, link partner acknowledge, link status change, auto-negotiation complete, remote fault, collision, etc. Applications: NIC cards, PC motherboards, switches, routers, DSL and cable modems, game machines, printers, network connected appliances, and industrial equipment.


  • Supports category 5 cables with attenuation in excess of 24dB at 100 MHz.
  • Single-chip, fully integrated PHY provides PCS, PMA, PMD, and AUTONEG sub layers functions of IEEE standard.
  • 10Base-T and 100Base-TX IEEE 8802.3 compliant
  • MIIM (MDC/MDIO) management bus for PHY register configuration
  • RMII interface support with external 50 MHz system clock
  • Single 3.3V power supply
  • Highly configurable
  • Media Independent Interface (MII)
  • Auto-Negotiation with Parallel detection
  • Node applications, managed or unmanaged
  • 10M or 100M full and half-duplex modes
  • Loopback mode for Diagnostic FunctionsAuto-MDI/MDIX crossover correction
  • Low-power CMOS (typically 300 mW)
  • Power-Down mode typically 21mW
  • Clock and crystal supported
  • Interrupt pin option
  • Fully integrated, DSP-based PMDAdaptive equalization and baseline-wander correction
  • Transmit wave shaping and stream cipher scrambler
  • MLT-3 encoder and NRZ/NRZI encoder
  • Single power supply (3.3 V)
  • Built-in 1.8 V regulator for core
  • Available in 32-pin (5mm x 5mm) QFN package, Pb-free
  • Available in Industrial Temp and Lead Free


Parameter Value Parameter Value
Pkg. Type VFQFPN Lead Count (#) 40
Temp. Grade C Pb (Lead) Free Yes
Carrier Type Tray


Shipping Type Ship Fee Lead Time
DHL DHL $20.00-$40.00 (0.50 KG) 2-5 days
Fedex Fedex $20.00-$40.00 (0.50 KG) 2-5 days
UPS UPS $20.00-$40.00 (0.50 KG) 2-5 days
TNT TNT $20.00-$40.00 (0.50 KG) 2-5 days
EMS EMS $20.00-$40.00 (0.50 KG) 2-5 days
REGISTERED AIR MAIL REGISTERED AIR MAIL $20.00-$40.00 (0.50 KG) 2-5 days

Processing Time:Shipping fee depend on different zone and country.


Terms of payment Hand Fee
Wire Transfer Wire Transfer charge US$30.00 banking fee.
Paypal Paypal charge 4.0% service fee.
Credit Card Credit Card charge 3.5% service fee.
Western Union Western Union charge US$0.00 banking fee.
Money Gram Money Gram charge US$0.00 banking fee.


1.The electronic components you purchase include 365 Days Warranty, We guarantee product quality.

2.If some of the items you received aren't of perfect quality, we would resiponsibly arrange your refund or replacement. But the items must remain their orginal condition.


  • Product

    Step1 :Product

  • Vacuum packaging

    Step2 :Vacuum packaging

  • Anti-static bag

    Step3 :Anti-static bag

  • Individual packaging

    Step4 :Individual packaging

  • Packaging boxes

    Step5 :Packaging boxes

  • bar-code shipping tag

    Step6 :bar-code shipping tag

All the products will packing in anti-staticbag. Ship with ESD antistatic protection.

Outside ESD packing’s lable will use ourcompany’s information: Part Mumber, Brand and Quantity.

We will inspect all the goods before shipment,ensure all the products at good condition and ensure the parts are new originalmatch datasheet.

After all the goods are ensure no problems afterpacking, we will packing safely and send by global express. It exhibitsexcellent puncture and tear resistance along with good seal integrity.

  • ESD
  • ESD

Equivalent Parts

For the 1894K-40LF component, you may consider these replacement and alternative parts:

Part Number




Part Number:  1894K-40LFT




Part Number:  1894K-40LF




Part Number:  1894KI-40LF




Part Number:  1894KI-40LFT




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    Lowest international shipping fee starts from $0.00

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