M48T201Y

The M48T201Y/V are self-contained devices that include a real time clock (RTC), programmable alarms, a watchdog timer, and a square wave output which provides control of up to 512K x 8 of external low-power static RAM. Access to all RTC functions and the external RAM is the same as conventional bytewide SRAM. The 16 TIMEKEEPER^® egisters M48T201Y/V offer year, month, date, day,hour, minute, second, calibration, alarm, century,watchdog, and square wave output data. Externally attached static RAMs M48T201Y/V are controlled by the M48T201Y/V via the GCON and ECON signals.

The 44-pin, 330mil SOIC M48T201Y/V provides sockets with gold plated contacts at both ends for direct connection to a separate SNAPHAT^® housing containing the battery and crystal. The unique design of M48T201Y/V allows the SNAPHAT battery package to be
mounted on top of the SOIC package after the completion of the surface mount process.

Insertion of the SNAPHAT M48T201Y/V housing after reflow prevents potential battery damage due to the high temperatures required for device surface-mounting.The SNAPHAT housing is keyed to prevent reverse insertion. The SOIC and battery packages are shipped separately in plastic anti-static tubes or in Tape & Reel form. For the 44-lead SOIC, the battery/crystal package of M48T201Y/V (e.g., SNAPHAT) part number is "M4Txx-BR12SH" (see Table 19., page 31).

Caution: Do not place the SNAPHAT battery/crystal top in conductive foam as this will drain the lithium button-cell battery.