M48T251V

The M48T251Y/V TIMEKEEPER^® RAM is a 512Kbit x 8 non-volatile static RAM and real time clock organized as 524,288 words by 8 bits. The special DIP package provides a fully integrated battery back-up memory and real time clock solution. In the event of power instability or absence, a self-contained battery maintains the timekeeping operation and provides power for a CMOS static RAM. Control circuitry monitors V_^CC and invokes write protection to prevent data corruption in the memory and RTC.

The clock keeps track of tenths/hundredths of seconds, seconds, minutes, hours, day, date, month, and year information. The last day of the month is automatically adjusted for months with less than 31 days, including leap year correction. The clock operates in one of two formats: a 12-hour mode with an AM/PM indicator; or a 24-hour mode

The M48T251Y/V is a 32-pin (PM) DIP module that integrates the RTC, the battery, and SRAM in one package.

The modules of M48T251Y/V are shipped in plastic, anti-static tubes (see Table 14., page 22).