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844N255AKILF - Renesas Electronics

Description: The 844N255I is a 6-output clock synthesizer designed for wireless infrastructure clock applications. The device uses IDT's fourth generation FemtoClock® NG technology for an optimum of high clock frequency and low phase noise performance, combined with a low power consumption and high power supply noise rejection. The reference frequency is selectable and the following frequency is supported: 25MHz. The synthesizer generates selectable 156.25MHz, 125MHz, 100MHz, 50MHz and 25MHz clock signals. The device is

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844N255AKILF - Renesas Electronics - PCB symbol
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PCB Footprints
844N255AKILF - Renesas Electronics PCB footprint - Quad Flat No-Lead - Quad Flat No-Lead - NLG48P1_-
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3D Models
844N255AKILF - Renesas Electronics - 3D model - Quad Flat No-Lead - NLG48P1_-
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844N255AKILF Details

  • Manufacturer Part Number:

    844N255AKILF

  • Brand Name:

    Renesas

  • Pbfree Code:

    Yes

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Obsolete

  • Part Package Code:

    VFQFPN

  • Pin Count:

    48

  • Manufacturer Package Code:

    NLG48P1

  • ECCN Code:

    EAR99

  • HTS Code:

    8542.39.00.01

  • Manufacturer:

    Renesas Electronics Corporation

  • YTEOL:

    0

  • JESD-609 Code:

    e3

  • Moisture Sensitivity Level:

    3

  • Peak Reflow Temperature (Cel):

    260

  • Terminal Finish:

    TIN

  • uPs/uCs/Peripheral ICs Type:

    CLOCK GENERATOR, OTHER

844N255AKILF Frequently Asked Questions (FAQs)

  • A thermal pad is recommended to be connected to a large copper area on the PCB to dissipate heat efficiently. A minimum of 2oz copper thickness is recommended for the thermal pad.
  • The device requires a power-on reset (POR) circuit to ensure proper startup. A capacitor between VCC and GND, and a pull-up resistor on the EN pin are recommended to ensure a clean startup.
  • Use a multi-layer PCB with a solid ground plane, and consider adding a common-mode choke and ferrite beads to reduce EMI. Additionally, use a low-ESR capacitor for the output filter to reduce noise.
  • Choose an inductor with a high saturation current rating, low DC resistance, and a suitable inductance value based on the output voltage and current requirements. A shielded inductor is recommended to reduce EMI.
  • The device has a thermal shutdown feature, but it's still important to design for thermal dissipation. Ensure good airflow, use a heat sink if necessary, and avoid blocking airflow around the device.

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844N255AKILF Overview

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