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BQ4802YDW - Texas Instruments

Description: Y2K-Compliant Parallel RTC with CPU Supervisor and External NVSRAM Control, 5V Vcc

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BQ4802YDW - Texas Instruments PCB footprint - Small Outline Packages - Small Outline Packages - DW (R-PDSO-G28)
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BQ4802YDW - Texas Instruments  - 3D model - Small Outline Packages - DW (R-PDSO-G28)
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BQ4802YDW Details

  • Manufacturer Part Number:

    BQ4802YDW

  • Brand Name:

    Texas Instruments

  • Pbfree Code:

    Yes

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Active

  • Part Package Code:

    SOIC

  • Pin Count:

    28

  • Country Of Origin:

    Taiwan

  • ECCN Code:

    EAR99

  • HTS Code:

    8542.39.00.90

  • Manufacturer:

    Texas Instruments

  • YTEOL:

    1

  • Clock Frequency-Max:

    0.032 MHz

  • External Data Bus Width:

    8

  • Information Access Method:

    PARALLEL, DIRECT ADDRESS

  • Interrupt Capability:

    Y

  • JESD-30 Code:

    R-PDSO-G28

  • JESD-609 Code:

    e4

  • Length:

    17.9 mm

  • Moisture Sensitivity Level:

    1

  • Number of Terminals:

    28

  • Operating Temperature-Max:

    70 °C

  • Package Body Material:

    PLASTIC/EPOXY

  • Package Code:

    SOP

  • Package Equivalence Code:

    SOP28,.4

  • Package Shape:

    RECTANGULAR

  • Package Style:

    SMALL OUTLINE

  • Peak Reflow Temperature (Cel):

    260

  • Qualification Status:

    Not Qualified

  • Seated Height-Max:

    2.65 mm

  • Supply Current-Max:

    9 mA

  • Supply Voltage-Max:

    5.5 V

  • Supply Voltage-Min:

    4.5 V

  • Supply Voltage-Nom:

    5 V

  • Surface Mount:

    YES

  • Technology:

    CMOS

  • Temperature Grade:

    COMMERCIAL

  • Terminal Finish:

    Nickel/Palladium/Gold (Ni/Pd/Au)

  • Terminal Form:

    GULL WING

  • Terminal Pitch:

    1.27 mm

  • Terminal Position:

    DUAL

  • Time-Min:

    SECONDS

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

    30

  • Volatile:

    YES

  • Width:

    7.5 mm

  • uPs/uCs/Peripheral ICs Type:

    TIMER, REAL TIME CLOCK

BQ4802YDW Frequently Asked Questions (FAQs)

  • Texas Instruments provides a recommended PCB layout in the datasheet, but it's essential to follow good PCB design practices, such as keeping the power and ground planes separate, using a solid ground plane, and minimizing trace lengths and widths to reduce EMI and noise.
  • To ensure reliable communication, use a proper SPI interface configuration, set the correct clock frequency, and implement error handling mechanisms, such as checksums or CRCs, to detect data corruption. Additionally, consider using a dedicated SPI bus isolator to prevent noise and interference.
  • The BQ4802YDW is rated for operation from -40°C to 125°C, but it's essential to consider the specific application's temperature requirements and ensure proper thermal management to prevent overheating and ensure reliable operation.
  • Follow the recommended power-up and power-down sequencing in the datasheet to prevent damage to the device. Typically, this involves powering up the VCC pin before the VBAT pin and powering down the VBAT pin before the VCC pin.
  • When using the BQ4802YDW in a battery-powered device, consider the device's low-power modes, implement power-saving techniques, such as sleep modes and dynamic voltage scaling, and ensure proper battery monitoring and charging circuitry to prevent over-discharge and prolong battery life.

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BQ4802YDW Overview

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About Texas Instruments

Texas Instruments (TI) designs and manufactures semiconductors and integrated circuits for a wide range of applications. The company's product portfolio includes analog chips, which are essential for managing power and signal functions in electronic devices, and embedded processors, which serve as the brains in various systems, enabling functionality in everything from industrial equipment to consumer electronics. TI's innovations in semiconductor technology have made it a leader in the industry.

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