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557G-05ALFT - Renesas Electronics

Description: The 557-05A is a spread-spectrum clock generator that supports PCI-Express requirements. It is used in PC or embedded systems to substantially reduce electro-magnetic interference (EMI). The device provides four differential HCSL or LVDS high-frequency outputs with spread spectrum capability. The output frequency and spread type are selectable using external pins.

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557G-05ALFT - Renesas Electronics PCB footprint - Small Outline Packages - Small Outline Packages - PGG20--
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557G-05ALFT Details

  • Manufacturer Part Number:

    557G-05ALFT

  • Brand Name:

    Renesas

  • Pbfree Code:

    Yes

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Active

  • Part Package Code:

    TSSOP

  • Pin Count:

    20

  • Manufacturer Package Code:

    PGG20

  • Country Of Origin:

    Taiwan

  • ECCN Code:

    EAR99

  • HTS Code:

    8542.39.00.01

  • Factory Lead Time:

    12 Weeks

  • Manufacturer:

    Renesas Electronics Corporation

  • YTEOL:

    6

  • JESD-30 Code:

    R-PDSO-G20

  • JESD-609 Code:

    e3

  • Length:

    6.5 mm

  • Moisture Sensitivity Level:

    1

  • Number of Terminals:

    20

  • Operating Temperature-Max:

    70 °C

  • Output Clock Frequency-Max:

    200 MHz

  • Package Body Material:

    PLASTIC/EPOXY

  • Package Code:

    TSSOP

  • Package Equivalence Code:

    TSSOP20,.25

  • Package Shape:

    RECTANGULAR

  • Package Style:

    SMALL OUTLINE, THIN PROFILE, SHRINK PITCH

  • Peak Reflow Temperature (Cel):

    260

  • Primary Clock/Crystal Frequency-Nom:

    25 MHz

  • Qualification Status:

    Not Qualified

  • Seated Height-Max:

    1.2 mm

  • Supply Voltage-Max:

    3.465 V

  • Supply Voltage-Min:

    3.135 V

  • Supply Voltage-Nom:

    3.3 V

  • Surface Mount:

    YES

  • Technology:

    CMOS

  • Temperature Grade:

    COMMERCIAL

  • Terminal Finish:

    Matte Tin (Sn) - annealed

  • Terminal Form:

    GULL WING

  • Terminal Pitch:

    0.65 mm

  • Terminal Position:

    DUAL

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

    30

  • Width:

    4.4 mm

  • uPs/uCs/Peripheral ICs Type:

    CLOCK GENERATOR, PROCESSOR SPECIFIC

557G-05ALFT Frequently Asked Questions (FAQs)

  • Renesas provides a recommended PCB layout guide in their application note (R01AN2734EU0101) which includes thermal design considerations, such as using a thermal pad and vias to dissipate heat.
  • Renesas recommends using an external overcurrent protection circuit, such as a fuse or a current sense resistor, to detect and respond to overcurrent conditions. The 557G-05ALFT does not have built-in overcurrent protection.
  • Renesas recommends using a 10uF to 22uF ceramic capacitor (X5R or X7R type) as the input capacitor, placed as close to the VIN pin as possible, to ensure stable operation and minimize noise.
  • Renesas recommends following the guidelines in the IEC 62368-1 standard for EMC, including using a metal shield or enclosure, minimizing loop areas, and using filtering components to reduce EMI emissions.
  • The 557G-05ALFT is rated for operation from -40°C to 125°C, but derating is required for temperatures above 85°C. Consult the datasheet for specific derating guidelines.

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557G-05ALFT Overview

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