PT7C4337AWEX

Real Time Clock Overview

The PT7C4337AWEX is a Real-Time Clock (RTC) module manufactured by Diodes Incorporated, packaged in an 8-pin SOIC. It operates on a 2-wire I2C bus interface with a supply voltage range of 1.2V to 5.5V. The device supports both 12-hour and 24-hour time formats, tracks leap years, and provides two programmable alarm interrupts. It features oscillator fail detection and a programmable square wave output. The component is RoHS compliant and lead-free.

Real Time Clock Feature Summary

• I2C Bus Interface: Supports standard communication protocols for time and calendar data access.
• Timekeeping Capabilities: Tracks seconds, minutes, hours, day of week, date, month, and year with leap year compensation.
• Dual Alarms: Includes Alarm 1 and Alarm 2 registers with mask bits for flexible interrupt triggering.
• Low Power Operation: Timekeeping current is typically 450nA at 1.8V; data retention down to 1.2V.

Real Time Clock Applications

• Embedded systems requiring precise timekeeping and calendar functions.
• Battery-backed devices needing low standby power consumption.
• Industrial equipment utilizing I2C communication for system synchronization.

Real Time Clock Procurement Notes

Verify the part status as the datasheet indicates this series may be obsolete with suggested replacements RT3A3240N3 or RT3A3241N. Confirm package availability matches the 'W' suffix for 8-pin SOIC. Ensure compliance with RoHS directives if required for specific regional regulations.

Real Time Clock Selection Notes

Select PT7C4337AWEX for applications requiring external crystal connection via X1/X2 pins. Choose PT7C4337AC variants if an integrated crystal oscillator is preferred. Verify I2C address compatibility with the host microcontroller. Check operating temperature range requirements against the -40°C to +85°C specification.

Real Time Clock Part Context

This component belongs to the PT7C4337A/4337AC family of real-time clock modules. The 'W' suffix denotes the 8-pin SOIC package variant. It is designed for low-cost, high-accuracy timekeeping in consumer and industrial electronics using standard I2C interfaces.

Real Time Clock Replacement Considerations

The datasheet explicitly states PART OBSOLETE and recommends using RT3A3240N3 or RT3A3241N as substitutes. Verify pinout and register compatibility before substitution.