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BQ4802YPW - Texas Instruments

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

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BQ4802YPW - Texas Instruments PCB footprint - Small Outline Packages - Small Outline Packages - PW(R-PDSO-G28)
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3D Models
BQ4802YPW - Texas Instruments  - 3D model - Small Outline Packages - PW(R-PDSO-G28)
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BQ4802YPW Details

  • Manufacturer Part Number:

    BQ4802YPW

  • Brand Name:

    Texas Instruments

  • Pbfree Code:

    Yes

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Active

  • Part Package Code:

    SSOP

  • 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:

    9.7 mm

  • Moisture Sensitivity Level:

    1

  • Number of Terminals:

    28

  • Operating Temperature-Max:

    70 °C

  • Package Body Material:

    PLASTIC/EPOXY

  • Package Code:

    TSSOP

  • Package Equivalence Code:

    TSSOP28,.25

  • Package Shape:

    RECTANGULAR

  • Package Style:

    SMALL OUTLINE, THIN PROFILE, SHRINK PITCH

  • Peak Reflow Temperature (Cel):

    260

  • Qualification Status:

    Not Qualified

  • Seated Height-Max:

    1.2 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:

    0.65 mm

  • Terminal Position:

    DUAL

  • Time-Min:

    SECONDS

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

    30

  • Volatile:

    YES

  • Width:

    4.4 mm

  • uPs/uCs/Peripheral ICs Type:

    TIMER, REAL TIME CLOCK

BQ4802YPW 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 UART interface, set the correct baud rate, and implement flow control (e.g., RTS/CTS) to prevent data loss. Additionally, use a level shifter if the microcontroller's logic level is different from the BQ4802YPW's.
  • The maximum cable length depends on the specific application and the type of cable used. As a general guideline, the BQ4802YPW can support cable lengths up to 100 meters (328 feet) at a data rate of 115.2 kbps. However, it's recommended to consult the datasheet and perform tests to determine the optimal cable length for your specific use case.
  • Implement error detection and correction mechanisms, such as checksums or CRC, to detect data corruption. Additionally, use timeouts and retries to handle transmission errors. The BQ4802YPW also provides error flags and interrupts that can be used to detect and respond to errors.
  • The power consumption of the BQ4802YPW depends on the operating mode and data rate. In general, the device consumes around 10-20 mA in active mode and 1-5 mA in standby mode. To optimize power consumption, use the device's power-down mode, reduce the data rate, and minimize the number of transmissions.

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BQ4802YPW 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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