PT7C433833AWEX

Real Time Clock Overview

The PT7C433833AWEX is a discontinued Real-time Clock (RTC) module manufactured by Diodes Incorporated. It operates via an I2C serial bus interface and supports both 12-hour and 24-hour time formats. The device includes a 56-byte non-volatile RAM block for data storage. It features a programmable square wave output with selectable frequencies of 1Hz, 4.096kHz, 8.192kHz, or 32.768kHz. The component functions within a supply voltage range of 2.7V to 5.5V and maintains operation in an industrial temperature range of -40°C to +85°C.

Real Time Clock Feature Summary

• I2C Bus Interface: Supports standard mode up to 400 kHz clock frequency.
• Timekeeping & Calendar: Tracks seconds, minutes, hours, days, dates, months, and years with automatic leap year compensation.
• Battery Backup: Dedicated VBAT pin allows continuous timekeeping during primary power loss.
• Oscillator Stop Flag: Hardware flag indicates when the oscillator has stopped running.

Real Time Clock Applications

• Industrial control systems requiring precise time synchronization.
• Data logging equipment needing long-term timestamp accuracy.
• Smart metering devices utilizing low-power RTC functionality.

Real Time Clock Procurement Notes

This specific part number is officially marked as obsolete and discontinued by the manufacturer. Verification of availability should focus on surplus distributors rather than direct factory orders. Engineering teams must confirm that any sourced units are genuine and have not exceeded shelf-life limits due to the extended period since production cessation.

Real Time Clock Selection Notes

Designers seeking active alternatives should evaluate current Diodes Incorporated RTC models or cross-reference compatible parts from other manufacturers. Selection criteria should prioritize matching the I2C address, package dimensions, and voltage requirements. Verify that replacement components support the required 56-byte RAM capacity and battery backup switching behavior.

Real Time Clock Part Context

The PT7C433833A belongs to the PT7C4338 family of real-time clock modules. The 'W' suffix denotes the 8-pin SOIC package, while 'EX' indicates tape-and-reel packaging. This series was designed for applications requiring robust timekeeping with minimal external components, leveraging internal oscillator circuits compatible with standard 32.768kHz crystals.

Real Time Clock Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Engineers should consult the manufacturer's official obsolescence notices or authorized distributor databases for recommended active replacements that maintain functional compatibility.