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BQ3285ES - Texas Instruments

Description: Texas Instruments BQ3285ES Real Time Clock

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BQ3285ES - Texas Instruments - PCB symbol
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BQ3285ES - Texas Instruments PCB footprint - Small Outline Packages - Small Outline Packages - DW (R-PDSO-G24)
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BQ3285ES - Texas Instruments - 3D model - Small Outline Packages - DW (R-PDSO-G24)
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BQ3285ES Details

  • Manufacturer Part Number:

    BQ3285ES

  • Brand Name:

    Texas Instruments

  • Pbfree Code:

    Yes

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Active

  • Part Package Code:

    SOIC

  • Pin Count:

    24

  • Country Of Origin:

    Taiwan

  • ECCN Code:

    EAR99

  • HTS Code:

    8542.39.00.90

  • Date Of Intro:

    1999-11-01

  • Manufacturer:

    Texas Instruments

  • YTEOL:

    1

  • Clock Frequency-Max:

    0.032 MHz

  • External Data Bus Width:

    8

  • Information Access Method:

    PARALLEL, MUXED BUS

  • Interrupt Capability:

    Y

  • JESD-30 Code:

    R-PDSO-G24

  • JESD-609 Code:

    e4

  • Length:

    15.4 mm

  • Moisture Sensitivity Level:

    1

  • Number of Terminals:

    24

  • Operating Temperature-Max:

    70 °C

  • Package Body Material:

    PLASTIC/EPOXY

  • Package Code:

    SOP

  • Package Equivalence Code:

    SOP24,.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:

    15 mA

  • Supply Voltage-Max:

    7 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

BQ3285ES Frequently Asked Questions (FAQs)

  • Texas Instruments recommends a compact layout with the BQ3285ES placed close to the battery, and the input capacitors (C1 and C2) placed as close as possible to the IC. The output capacitor (C3) should be placed near the load. A 4-layer PCB with a solid ground plane is recommended to minimize noise and EMI.
  • Choose X5R or X7R ceramic capacitors with a voltage rating of at least 10V. The capacitance value should be between 1uF to 10uF, with a recommended value of 4.7uF. Ensure the capacitors have a low ESR (Equivalent Series Resistance) to minimize power loss and improve efficiency.
  • The BQ3285ES can handle input voltages up to 18V, but it's recommended to operate within the 3.5V to 16V range for optimal performance and efficiency. Exceeding 18V may cause damage to the IC.
  • The output voltage is set by the resistor divider network (R1 and R2) connected to the FB pin. Use the formula: Vout = 1.25V x (1 + R2/R1) to calculate the required resistor values. Ensure the resistors have a 1% tolerance to maintain accuracy.
  • The BQ3285ES has a minimum startup voltage of 2.5V. If the input voltage is below this threshold, the IC will not start up. Ensure the input voltage is above 2.5V to guarantee proper operation.

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BQ3285ES 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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