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The PT7C4363BQ serial real-time clock is an automotive low-power clock/calendar with a programmable square-wave output.

Address and data are transferred serially via a 2-wire bidirectional bus. The clock/calendar 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 the 24-hour format indicator.

Table 1 shows the basic functions of PT7C4363BQ. More details are shown in section: overview of functions.


  • Drop-In Replacement for PT7C4363
  • Supports High-ESR Crystals Up To 100kΩ
  • Supports alarm and timer
  • Supports I2C-Bus's high speed mode (400 kHz)
  • Includes time (Hour/Minute/Second) and calendar (Year/Month/Date/Day) counter functions (BCD code)
  • Low backup current: typ. 400nA at VDD=3.0V and TA=25°C
  • Operating range: 1.3V to 5.5V
  • Extended Operating Temp: -40°C to 125°C
  • AECQ-100 Compliant for Automotive Application
  • Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
  • Halogen and Antimony Free. “Green” Device (Note 3)
  • PPAP Capable (Note 4)
  • Packaging (Pb-free & Green): 8-Pins, SOIC (W)

Product Specifications

Product Parameters

Compliance Automotive
Time Display Yes
NV Ram N/A
Interface I2C
Alarm Interrupt Yes
Battery Backup N/A
Clock Calibration N/A

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Technical Documents

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Additional Technical Documents are available upon request:
Application information, Evaluation board, and Other technical documents

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Orderable Part Number Status Package Environmental Compliance Packing Buy from Distributor /
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PT7C4363BQ1WEX Active SO-8 LFGP 2500 T&R Request Sample

Environmental Compliance Legend:
LFF: Pb-Free Finish and RoHS 5/6
TLFP: Totally Pb-Free Product and RoHS 6/6
LFGP: Pb-free Finish and Green Product, RoHS 5/6 and Halogen Free
TPGP: Totally Pb-Free and Green Product, RoHS 6/6 and Halogen Free
GREEN: Halogen-free and RoHS compliant
RoHS: RoHS compliant but NOT halogen-free


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