PT7C4337ACSEX

Real Time Clock Overview

The PT7C4337ACSEX is a Real-Time Clock (RTC) module manufactured by Diodes Incorporated, featuring an integrated 32.768kHz crystal oscillator. It communicates via a 2-wire I2C bus interface and supports both 12-hour and 24-hour time formats with a century bit. The device operates within a supply voltage range of 1.2V to 5.5V and functions across temperatures from -40°C to +85°C. Key features include two programmable alarms, a programmable square wave output, and oscillator fail detection. This specific part number utilizes a 16-pin SOIC package.

Real Time Clock Feature Summary

• Integrated 32.768kHz crystal oscillator eliminates external components
• Dual alarm system with interrupt outputs on INTA and SQW/INTB pins
• I2C serial interface supporting standard mode up to 400 kHz
• Low power consumption with data retention down to 1.2V

Real Time Clock Applications

• Embedded systems requiring precise timekeeping
• Consumer electronics with calendar functionality
• Industrial equipment needing low-power RTC solutions

Real Time Clock Procurement Notes

This component is officially marked as obsolete in the datasheet. Verification of current availability should be conducted directly with authorized distributors or the manufacturer. Alternative sourcing may require evaluating the recommended replacement parts listed in the documentation.

Real Time Clock Selection Notes

Select this model when an integrated oscillator is required for board space savings. Ensure the design accommodates the 16-pin SOIC footprint. Verify that the application logic supports the specific I2C addressing and register map defined in the datasheet.

Real Time Clock Part Context

The PT7C4337ACSEX belongs to the PT7C4337A/4337AC family. The 'AC' suffix denotes the variant with an integrated crystal oscillator, distinguishing it from the 'A' variant which requires an external crystal. The 'S' indicates the 16-pin SOIC package, and 'EX' specifies tape and reel packaging.

Real Time Clock Replacement Considerations

The datasheet explicitly states: PART OBSOLETE - USE RT3A3240N3 and RT3A3241N. These are the confirmed public substitutes provided by the manufacturer.