PT7C4563BUEX

Real Time Clock Overview

The PT7C4563BUEX is a Real-time Clock (RTC) module manufactured by Diodes Incorporated, utilizing an I2C bus interface. It operates within a supply voltage range of 1.3V to 5.5V and supports an operating temperature range of -40°C to +85°C. The device features BCD format storage for time and calendar data, including seconds, minutes, hours, dates, months, years, and days of the week. Key electrical parameters include a maximum supply current of 35µA during active I2C communication at 400kHz, and typical standby currents ranging from 400nA to 850nA depending on voltage and square wave output status.

Real Time Clock Feature Summary

• I2C Bus Interface: Supports standard mode up to 400kHz with dedicated SDA and SCL pins requiring external pull-up resistors.
• Oscillator Fail Detect: Includes an OSF bit in the Seconds register to indicate clock integrity issues.
• Programmable Square Wave Output: Provides selectable frequencies of 32.768kHz, 1.024kHz, 32Hz, or 1Hz via the SQW pin.
• Alarm Functionality: Features comparator alarm registers for minutes, hours, dates, and weekdays with interrupt generation capabilities.

Real Time Clock Applications

• Embedded systems requiring precise timekeeping and calendar tracking.
• Industrial control equipment needing low-power real-time monitoring.
• Consumer electronics utilizing I2C-based microcontroller architectures.

Real Time Clock Procurement Notes

Verify component authenticity through authorized distribution channels due to market availability variations. Confirm package specifications match design requirements, as the 'U' suffix denotes the MSOP-8 package. Ensure compliance with RoHS directives and lead-free manufacturing standards specified by the manufacturer. Review datasheet revision history for any updates to electrical characteristics or pin configurations prior to finalizing procurement orders.

Real Time Clock Selection Notes

Select this component when an I2C-compatible RTC with low power consumption and oscillator fail detection is required. The MSOP-8 package is suitable for space-constrained PCB layouts. Ensure the host system provides appropriate pull-up resistors for the I2C bus lines. Verify that the external 32.768kHz crystal matches the load capacitance requirements, considering the built-in 12pF capacitors if using specific crystal types.

Real Time Clock Part Context

The PT7C4563BUEX belongs to the PT7C4563B series of Real-time Clock modules. It shares functional similarities with other variants like PT7C4563BLEX and PT7C4563BWEX, differing primarily in packaging. The 'U' suffix specifically identifies the Mini Small Outline Package (MSOP). This series is designed for applications requiring accurate timekeeping with minimal power overhead in battery-backed or low-voltage environments.

Real Time Clock Replacement Considerations

Direct substitutes include other PT7C4563B variants with different packages, such as PT7C4563BLEX (TSSOP-8) or PT7C4563BWEX (SOIC-8), provided footprint compatibility is addressed. Cross-referencing with similar I2C RTCs requires verifying register maps and electrical specifications to ensure functional equivalence in existing designs.