PT7C4363BQ1WEX

Real Time Clock Overview

The PT7C4363BQ1WEX is an automotive-grade Real-Time Clock (RTC) module manufactured by Diodes Incorporated. It operates on a 2-wire I2C bus interface and supports high-speed mode up to 400 kHz. The device provides timekeeping in 24-hour format and calendar data including year, month, date, and day of the week using BCD codes. It utilizes an external 32.768 kHz crystal oscillator and features programmable square wave outputs at selectable frequencies. Electrical specifications include a supply voltage range of 1.3 V to 5.5 V and an operating temperature range of -40°C to +125°C. The component is packaged in an 8-pin SOIC (W) housing.

Real Time Clock Feature Summary

• Automotive AEC-Q100 Grade 1 qualified with PPAP capability
• I2C bus interface supporting standard and high-speed modes (up to 400 kHz)
• Integrated 24-hour time counter and calendar with BCD output
• Programmable alarm and timer interrupt functions with open-drain INT output
• Selectable square wave output frequencies: 32.768 kHz, 1.024 kHz, 32 Hz, or 1 Hz

Real Time Clock Applications

• Automotive infotainment systems requiring precise time synchronization
• Vehicle telematics units for event logging and timestamping
• Electronic control modules needing backup clock functionality
• Industrial equipment requiring real-time tracking in harsh environments

Real Time Clock Procurement Notes

This specific part number indicates an automotive-compliant version with lead-free packaging and tape/reel shipping. Verification should confirm the suffix 'Q1' corresponds to AEC-Q100 Grade 1 qualification and 'E' denotes environmental compliance. As this component is marked as obsolete/discontinued in some distributor listings, availability may be limited to existing stock or last-time buys.

Real Time Clock Selection Notes

Select this component when an automotive-qualified RTC with I2C connectivity is required. Ensure the design accommodates the necessary external 32.768 kHz crystal and load capacitors (typically 20 pF on X1). Verify that the system voltage falls within the 1.3 V to 5.5 V range. Note that the oscillator fail detect bit requires software monitoring to ensure clock integrity.

Real Time Clock Part Context

The PT7C4363BQ series is designed for applications demanding reliable timekeeping under automotive conditions. The 'BQ' designation signifies the automotive variant, while 'W' indicates the SOIC package. This model integrates oscillator circuitry, allowing direct connection to a crystal without additional buffer components, simplifying the PCB layout compared to non-integrated RTC solutions.

Real Time Clock Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Due to the obsolete status indicated in source materials, alternative sourcing should verify functional compatibility regarding I2C addressing, register maps, and electrical characteristics.