PT7C433833AZEEX

Real Time Clock Overview

The PT7C433833AZEEX is a Real-Time Clock (RTC) module manufactured by Diodes Incorporated, packaged in an 8-pin TDFN (2x3mm). It operates on a 2-wire I2C serial interface with a maximum clock frequency of 400 kHz. The device supports both 12-hour and 24-hour time formats and includes a calendar counter for seconds, minutes, hours, days, dates, months, and years. It features 56 bytes of non-volatile SRAM and a programmable square wave output. Recommended operating conditions specify a supply voltage range of 2.7V to 5.5V and a battery backup voltage range of 1.3V to 3.7V.

Real Time Clock Feature Summary

• I2C Bus Interface: Supports standard and fast mode communication up to 400 kHz.
• Calendar and Timekeeping: BCD-coded counters for seconds, minutes, hours, day of week, date, month, and year with automatic leap-year correction.
• Non-Volatile Memory: Includes 56 bytes of general-purpose RAM accessible via the I2C bus.
• Battery Backup: Automatic power-fail detection switches operation to VBAT when VCC drops below the power-fail threshold.

Real Time Clock Applications

• Industrial control systems requiring precise timekeeping.
• Smart meters and data logging equipment.
• Battery-powered portable devices needing low standby current.
• Embedded systems utilizing I2C communication protocols.

Real Time Clock Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm package integrity upon receipt, as the TDFN form factor requires careful handling during surface-mount assembly. Ensure design compliance with RoHS directives and verify that the specific ordering suffix matches the required tape-and-reel packaging configuration.

Real Time Clock Selection Notes

Select this component when an I2C-compatible RTC with integrated SRAM is required. Ensure the host microcontroller supports the necessary I2C pull-up requirements for SDA and SQW/OUT pins. Verify that the application environment stays within the -40°C to +85°C operating temperature range and that the available supply voltages align with the specified 2.7V to 5.5V active range.

Real Time Clock Part Context

This part belongs to the PT7C433833A family of real-time clock modules from Diodes Incorporated. The 'ZE' suffix specifically denotes the 8-pin Thin Dual Flat No-lead (TDFN) package variant. Other variants in the series include SOIC and MSOP packages, offering flexibility for different PCB layout constraints while maintaining identical electrical functionality.

Real Time Clock Replacement Considerations

Publicly confirmed substitute part numbers are not provided in the source documentation. Engineers should consult the manufacturer's official obsolescence notices or cross-reference guides for compatible alternatives if this discontinued item is no longer available.