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1894K-40LFT - Renesas Electronics

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 recei

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1894K-40LFT - Renesas Electronics - PCB symbol
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1894K-40LFT - Renesas Electronics PCB footprint - Quad Flat No-Lead - Quad Flat No-Lead - 40-pin 6mm x 6mm QFN-1
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1894K-40LFT - Renesas Electronics - 3D model - Quad Flat No-Lead - 40-pin 6mm x 6mm QFN-1
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1894K-40LFT Details

  • Manufacturer Part Number:

    1894K-40LFT

  • Brand Name:

    Renesas

  • Pbfree Code:

    Yes

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Active

  • Part Package Code:

    VFQFPN

  • Pin Count:

    40

  • Manufacturer Package Code:

    NLG40P1

  • Country Of Origin:

    Taiwan

  • HTS Code:

    8542.39.00.01

  • Factory Lead Time:

    18 Weeks

  • Manufacturer:

    Renesas Electronics Corporation

  • YTEOL:

    6

  • Data Rate:

    100000 Mbps

  • JESD-30 Code:

    S-XQCC-N40

  • JESD-609 Code:

    e3

  • Length:

    6 mm

  • Moisture Sensitivity Level:

    3

  • Number of Functions:

    1

  • Number of Terminals:

    40

  • Number of Transceivers:

    1

  • Operating Temperature-Max:

    70 °C

  • Package Body Material:

    UNSPECIFIED

  • Package Code:

    HVQCCN

  • Package Equivalence Code:

    LCC40,.24SQ,20

  • Package Shape:

    SQUARE

  • Package Style:

    CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

  • Peak Reflow Temperature (Cel):

    260

  • Qualification Status:

    Not Qualified

  • Screening Level:

    IEEE 802.3; IEEE 802.3u

  • Seated Height-Max:

    1 mm

  • Supply Voltage-Nom:

    3.3 V

  • Surface Mount:

    YES

  • Technology:

    CMOS

  • Telecom IC Type:

    ETHERNET TRANSCEIVER

  • Temperature Grade:

    COMMERCIAL

  • Terminal Finish:

    Matte Tin (Sn) - annealed

  • Terminal Form:

    NO LEAD

  • Terminal Pitch:

    0.5 mm

  • Terminal Position:

    QUAD

  • Time@Peak Reflow Temperature-Max (s):

    30

  • Width:

    6 mm

1894K-40LFT Frequently Asked Questions (FAQs)

  • Renesas provides a recommended PCB layout guide in their application note (AP61104) for the 1894K-40LFT, which includes guidelines for thermal vias, copper pours, and component placement to minimize thermal resistance and ensure reliable operation.
  • Renesas recommends using an external overcurrent protection circuit, such as a fuse or a dedicated overcurrent protection IC, to prevent damage to the device in case of an overcurrent event. The datasheet provides guidelines for selecting the appropriate protection components.
  • Renesas recommends a specific power-up sequence to ensure proper device operation and prevent latch-up. The recommended sequence is: VCC, then VDD, and finally the input signals. The datasheet provides more detailed information on the power-up sequence.
  • Renesas recommends implementing ESD protection measures, such as using ESD protection diodes or TVS diodes, to prevent damage to the device from electrostatic discharge. The datasheet provides guidelines for selecting the appropriate ESD protection components.
  • The 1894K-40LFT has an operating temperature range of -40°C to +125°C, but Renesas recommends derating the device's performance at temperatures above 85°C to ensure reliable operation.

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