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1339-31DCGI - Renesas Electronics

Description: The 1339 serial real-time clock (RTC) is a low-power clock/date device with two programmable time-of-day alarms and a programmable square-wave output. Address and data are transferred serially through an I2C bus. The clock/date provides seconds, minutes, hours, day, date, month, and year information. The date at the end of the month is automatically adjusted for months with fewer than 31 days, including corrections for leap year. The clock operates in either the 24-hour or 12-hour format with AM/PM indicato

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1339-31DCGI - Renesas Electronics PCB footprint - Small Outline Packages - Small Outline Packages - (8-pin SOIC, 150 Mil. Narrow Body)
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1339-31DCGI - Renesas Electronics  - 3D model - Small Outline Packages - (8-pin SOIC, 150 Mil. Narrow Body)
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1339-31DCGI Details

  • Manufacturer Part Number:

    1339-31DCGI

  • Brand Name:

    Renesas

  • Pbfree Code:

    Yes

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Active

  • Part Package Code:

    SOIC

  • Package Description:

    SOIC-8

  • Pin Count:

    8

  • Manufacturer Package Code:

    DCG8

  • Country Of Origin:

    Philippines, Thailand

  • ECCN Code:

    EAR99

  • HTS Code:

    8542.39.00.01

  • Factory Lead Time:

    12 Weeks

  • Manufacturer:

    Renesas Electronics Corporation

  • YTEOL:

    15

  • Clock Frequency-Max:

    0.032768 MHz

  • Information Access Method:

    SERIAL(I2C)

  • Interrupt Capability:

    Y

  • JESD-30 Code:

    R-PDSO-G8

  • JESD-609 Code:

    e3

  • Length:

    4.9 mm

  • Moisture Sensitivity Level:

    1

  • Number of Terminals:

    8

  • Operating Temperature-Max:

    85 °C

  • Operating Temperature-Min:

    -40 °C

  • Package Body Material:

    PLASTIC/EPOXY

  • Package Code:

    SOP

  • Package Equivalence Code:

    SOP8,.25

  • Package Shape:

    RECTANGULAR

  • Package Style:

    SMALL OUTLINE

  • Peak Reflow Temperature (Cel):

    260

  • Qualification Status:

    Not Qualified

  • Seated Height-Max:

    1.75 mm

  • Supply Current-Max:

    0.45 mA

  • Supply Voltage-Max:

    5.5 V

  • Supply Voltage-Min:

    2.45 V

  • Supply Voltage-Nom:

    3.3 V

  • Surface Mount:

    YES

  • Technology:

    CMOS

  • Temperature Grade:

    INDUSTRIAL

  • Terminal Finish:

    Matte Tin (Sn) - annealed

  • Terminal Form:

    GULL WING

  • Terminal Pitch:

    1.27 mm

  • Terminal Position:

    DUAL

  • Time-Min:

    SECONDS

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

    30

  • Volatile:

    NO

  • Width:

    3.905 mm

  • uPs/uCs/Peripheral ICs Type:

    TIMER, REAL TIME CLOCK

1339-31DCGI Frequently Asked Questions (FAQs)

  • Renesas provides a recommended PCB layout guide in their application note (R01AN2732EU0100) which includes thermal vias, copper pours, and component placement guidelines to ensure optimal thermal performance.
  • Renesas recommends using an external overcurrent protection circuit, such as a fuse or a dedicated overcurrent protection IC, to prevent damage to the device. The datasheet provides guidelines for selecting the appropriate protection components.
  • Renesas recommends a power-up sequence of VCC, then VDD, and finally EN (enable) to ensure proper device operation and prevent latch-up. The datasheet provides a detailed power-up sequence diagram.
  • Renesas provides an I2C troubleshooting guide in their application note (R01AN2733EU0100) which covers common issues, such as bus contention, clock stretching, and slave address conflicts, along with debugging techniques and tools.
  • The 1339-31DCGI has an operating temperature range of -40°C to +125°C, but Renesas recommends derating the device's performance at temperatures above 85°C to ensure reliability and prevent thermal shutdown.

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1339-31DCGI Overview

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