Diodes Menu Close
Back to Real Time Clock (RTC)

PT7C433833

I2C Interface RTC and low power RTC

NOTE: Datasheet may not yet reflect updated package obsolescence/phase out status or Package Drawing. Please refer to the PRODUCT OPTIONS tab for the most up to date package options and drawings. Please refer to PCN/PDN tabs for most current package obsolescence/phase out status.
Contact Sales

Log in or register to manage email notifications about changes to datasheets or PCNs for this part.

Product Description

The PT7C4338 serial real-time clock 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. The PT7C4338 series have a built-in power sense circuit that detects power failures and automatically switches to the battery supply. Table 1 shows the basic functions of PT7C4338. More details are shown in section: overview of functions.

Product Features

  • Using external 32.768kHz quartz crystal
  • Supports I2C-Bus's high speed mode (400 kHz)
  • Includes time (Hour/Minute/Second) and calendar (Year/Month/Date/Day) counter functions (BCD code)
  • Programmable square wave output signal
  • 56-byte, battery-backed, nonvolatile (NV) RAM for data storage
  • Automatic power-fail detect and switch circuitry of battery backup
  • UL Recognized: E348121

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

Related Content

Packages

Technical Documents

Design tool model software

Recommended Soldering Techniques

TN1.pdf

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 /
Contact Sales
Request Samples
Qty. Carrier
PT7C433833UE Obsolete MSOP-8 LFGP 100 TUBE
PT7C433833UEX Active MSOP-8 TPGP 2500 T&R Contact Sales Request Sample
PT7C433833WE Obsolete SO-8 LFGP 100 TUBE
PT7C433833WEX Not Recommended for New Design (NRND) SO-8 GREEN 2500 T&R Contact Sales

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

PCNs

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
PCN-2493 2020-12-28 2021-03-28 Qualified Additional A/T Sites and Bill of Materials (BOM)
PCN-2481 2020-08-26 2021-02-26 Device End of Life (EOL)
PCN-2448 2020-02-05 2020-08-05 Device End of Life (EOL)

FAQs