PT7C4563ZEEX

Real Time Clock Overview

The PT7C4563ZEEX is a low-power serial real-time clock module manufactured by Diodes Incorporated. It operates within a supply voltage range of 1.3V to 5.5V and supports I2C bus high-speed mode at 400 kHz. The device provides timekeeping for seconds, minutes, hours, day, date, month, and year in BCD format, with automatic leap year correction. It features an external 32.768kHz crystal interface, programmable square wave output, and alarm interrupt capabilities. The component is housed in an 8-pin TDFN package.

Real Time Clock Feature Summary

• I2C Bus Interface: Supports standard and high-speed modes up to 400 kHz.
• Calendar Functionality: Tracks time and date with automatic adjustments for month lengths and leap years.
• Low Power Consumption: Typical backup current is 400nA at VDD=3.0V and TA=25°C.
• Alarm System: Configurable alarm interrupt signals triggered by specific time or date matches.

Real Time Clock Applications

• Portable electronic devices requiring precise timekeeping.
• Industrial control systems needing calendar functions.
• Battery-operated equipment utilizing low standby current.
• Embedded systems integrating I2C communication protocols.

Real Time Clock Procurement Notes

Verify the ordering suffix 'ZEEX' corresponds to the 8-pin TDFN package with Tape/Reel packaging and lead-free/green specifications. Confirm that the application circuit includes the required external 32.768kHz quartz crystal and pull-up resistors for the SDA and SCL lines as specified in the datasheet.

Real Time Clock Selection Notes

Select this part when an I2C-compatible RTC with high-speed support (400 kHz) is required. Ensure the operating voltage range of 1.3V to 5.5V matches the system design. Consider the TDFN-8 package dimensions if space constraints are critical compared to SOIC or TSSOP alternatives.

Real Time Clock Part Context

This component belongs to the PT7C4563 series of real-time clock modules. The base model PT7C4563 offers identical electrical functionality across various packages. The ZEEX designation specifically identifies the TDFN-8 variant supplied in tape and reel format for automated surface-mount assembly.

Real Time Clock Replacement Considerations

Compatible replacements include other PT7C4563 variants such as PT7C4563LEX (TSSOP-8) or PT7C4563WEX (SOIC-8), provided the physical footprint and pinout compatibility are verified for the specific PCB layout.

Real Time Clock FAQ

What is the maximum I2C clock frequency supported?

The PT7C4563ZEEX supports the I2C bus high-speed mode with a maximum SCL clock frequency of 400 kHz.

How does the device handle leap years?

The internal calendar counter automatically adjusts for months with fewer than 31 days and treats any two-digit year divisible by 4 as a leap year until the year 2100.

What external components are required for operation?

Operation requires an external 32.768kHz quartz crystal connected between X1 and X2 pins, along with external pull-up resistors for the SDA and SCL lines if the master device outputs are open-drain.