Overview

The RTC-72421/RTC-72423 module is a real time clock that can be connected directly to a microprocessor’s bus. Its built-in crystal unit enables highly accurate time-keeping with no physical access required for adjustment and, since there is no need to connect external components, mounting and other costs can be reduced.
In addition to its time and calendar functions, the RTC-72421/RTC-72423 enables the use of 30-seconds correction and fixedperiod interrupt functions.
The RTC-72421/RTC-72423 module is ideally suited for applications requiring timing management, such as personal computers, dedicated word-processors, fax machines, multi-function telephones, and sequencers.

FEATURES
‧ Built-in crystal unit allows adjustment-free efficient operation.
‧ 24 h /12 h changeable and leap year automatically adjustable (Gregorian calendar). Note
‧ 7242series does not have complete compatibility ability for the “old product RTC-6242 series”.
‧ when replace to 7242series from 6242 series, confirm the technical information of RTC7242 latest manual by all means.