PT7C4563ZEE

Real Time Clock Overview

The PT7C4563ZEE is a low-power serial real-time clock module manufactured by Diodes Incorporated, housed in an 8-pin TDFN package. 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 using BCD code, with automatic leap year adjustments. Key features include a programmable square wave output, alarm interrupt functionality, and oscillator fail detection. Typical backup current is 400nA at VDD=3.0V and TA=25°C.

Real Time Clock Feature Summary

• I2C Bus Interface: Supports high-speed mode up to 400 kHz with 2-wire bidirectional communication.
• Calendar & Time: Tracks seconds through year in BCD format; auto-adjusts for month lengths and leap years until 2100.
• Low Power Consumption: Typical backup current of 400nA at 3.0V; operating voltage range 1.3V to 5.5V.
• Alarm & Output: Features one alarm system with interrupt output and a programmable square wave output (1Hz, 32Hz, 1.024kHz, 32.768kHz).

Real Time Clock Applications

• Battery-powered consumer electronics requiring precise timekeeping.
• Portable instruments and electronic metering devices.
• Embedded systems utilizing I2C communication for clock/calendar data.

Real Time Clock Procurement Notes

Verify the ordering suffix 'ZE' corresponds to the 8-pin TDFN (2x3mm) package configuration. Confirm RoHS compliance status via official documentation, as the 'E' suffix indicates lead-free and green material composition. Ensure external pull-up resistors are included in the design for SDA and SCL lines, as the outputs are open-drain.

Real Time Clock Selection Notes

Select this component when a compact TDFN footprint is required for I2C-based RTC applications. Ensure the host microcontroller supports I2C high-speed mode if 400 kHz operation is desired. Verify that the application environment stays within the -40°C to +85°C operating temperature range. Consider the built-in 12pF capacitors for crystal connection when designing the oscillator circuit.

Real Time Clock Part Context

The PT7C4563ZEE belongs to the PT7C4563 series of real-time clock modules from Diodes Incorporated (formerly Pericom). This series offers various package options including SOIC, MSOP, TSSOP, and TDFN. The ZEE variant specifically denotes the lead-free, tape-and-reel packaged version in the 8-pin TDFN housing, distinguishing it from tube-packed or different package variants like the WE or LE.

Real Time Clock Replacement Considerations

Direct pin-to-pin replacements within the same family include PT7C4563WE, PT7C4563UE, and PT7C4563LE, provided the package type change is acceptable. Cross-vendor equivalents such as PCF8563 share similar I2C interfaces and functions but may differ in register mapping and electrical characteristics; thorough datasheet comparison is required before substitution.