PT7C4372AZEEX

Real Time Clock Overview

The PT7C4372AZEEX is a Real-Time Clock (RTC) module manufactured by Diodes Incorporated, housed in an 8-pin W-DFN2030 package. It features an I2C bus interface for communication with a CPU and supports external crystals of 32.768kHz or 32.000kHz. The device provides clock precision adjustment with units of ±3.051ppm (for 32.768kHz) or ±3.125ppm (for 32.000kHz). It includes two alarm registers (Alarm_A and Alarm_B), periodic interrupt capabilities, and oscillation stop detection. The operating voltage range is 2V to 5.5V, with an industrial temperature range of -40°C to +85°C.

Real Time Clock Feature Summary

• I2C Bus Interface: Supports standard read/write operations and simplified read modes with auto-incrementing addresses.
• Clock Adjustment: Internal trimming register allows frequency adjustment within ±189.1ppm using 7-bit data.
• Dual Alarms & Interrupts: Two independent alarms (Alarm_A, Alarm_B) with configurable output routing via /INTA and /INTB pins.
• Detection Functions: Includes oscillation stop detection, power drop detection, and power-on reset detection.

Real Time Clock Applications

• Embedded systems requiring precise timekeeping and calendar functions.
• Battery-backed devices needing low-power real-time clock monitoring.
• Industrial equipment operating within -40°C to +85°C environments.
• Consumer electronics utilizing I2C-connected microcontrollers.

Real Time Clock Procurement Notes

Verify the specific suffix 'ZEEX' against the manufacturer's official documentation to confirm packaging details such as cut tape or reel specifications. Ensure compatibility with the W-DFN2030-8 footprint during PCB layout. Confirm RoHS compliance status directly from the datasheet revision history.

Real Time Clock Selection Notes

Select this component when an I2C-compatible RTC with dual alarms and programmable periodic interrupts is required. Consider the internal oscillator capacitors (CG=20pF, CD=5pF) and recommended external capacitors (C1=4pF, C2=18pF for CL=12.5pF) for circuit design. Choose between PT7C4372A and PT7C4372C variants based on default control register settings if applicable.

Real Time Clock Part Context

The PT7C4372A series is part of Diodes Incorporated's portfolio of real-time clock modules. The PT7C4372C variant differs primarily in default control register values (e.g., Control Register 1 defaults to 0x03 vs 0x00 for PT7C4372A). Both share identical pinouts, functional blocks, and electrical characteristics.

Real Time Clock Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Verify pinout and register compatibility before considering any alternative RTC ICs.

Real Time Clock FAQ

What is the clock precision adjustment unit for a 32.768kHz crystal?

The adjustment unit is ±3.051ppm for a 32.768kHz crystal.

How many alarm registers does the PT7C4372A/C support?

It supports two alarm registers: Alarm_A and Alarm_B.

What are the default values for Control Register 1 (Addr E) for PT7C4372A and PT7C4372C?

For PT7C4372A, the default is 0x00. For PT7C4372C, the default is 0x03.