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Real Time Clock (I2C)

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The PT7C433833A is a low-power clock/calendar with a programmable square-wave output and 56 bytes of nonvolatile RAM.

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 either the 24-hour or 12-hour format with AM/PM indicator. PT7C4338eeA has a built-in power sense circuit that detects power failures and automatically switches to the battery supply.


  • Accuate calendar and time keeping
  • Programmable square wave output
  • Built in 56 bytesof NVRAM
  • Easy I2C interface
  • Automatic power switch to backup battery


  • Networking switch, smart home appliance

Product Specifications

Product Parameters

Compliance(Only Automotive supports PPAP) Standard
Time Display 12, 24
NV Ram 56x8
Interface I2C
Alarm Interrupt 0
Battery Backup 1
Clock Calibration 0

Technical Documents

Recommended Soldering Techniques


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

Request Documents
Orderable Part Number Status Package Environmental Compliance Packing Buy from Distributor /
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Qty. Carrier
PT7C433833AUEX Active MSOP-8 TPGP 2500 T&R


Authorized Distributor Quantity Inventory Date Countries/Regions Buy Online
Mouser Electronics Inc. 503 1/19/2022 South America, North America, Asia, Europe, Middle East Buy Now
Request Sample
PT7C433833AWEX Active SO-8 TPGP 2500 T&R Contact Sales Request Sample
PT7C433833AZEEX Active W-DFN2030-8 GREEN 3000 T&R Contact Sales 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


Product Change Notices

PCN # Issue Date Implementation Date Subject
PCN-2510 2021-02-26 2021-05-26 Qualified Additional A/T Sites, Fab Site and Data Sheet Change


Related Application FAQs