M48T08-150PC1 Organisation, STMicroelectronics 150ns NVRAM, 28-Pin PCDIP, M48T08-150PC1

Real Time Clock with Parallel Interface, TIMEKEEPER® SRAM, STMicroelectronics
Timekeepers, combine SRAM with up to 256 Kbytes of memory, and a byte-wide interface along with a quartz-based very-low-power oscillator with a clock/calendar circuit to provide real-time data. Packages embed the battery and crystal.
M48T08-150PC1/
The M48T08/18/08Y is a non-volatile pin and function equivalent to any JEDEC standard 8 K x 8 SRAM. It also easily fits into many ROM, EPROM, and EEPROM sockets, providing the non-volatility of PROMs without any requirement for special WRITE timing or limitations on the number of WRITEs that can be performed.The 28-pin, 600 mil DIP CAPHAT™ houses the M48T08/18/08Y silicon with a quartz crystal and a long-life lithium button cell in a single package.The 28-pin, 330 mil SOIC 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 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®housing after reflow prevents potential battery and crystal damage due to the high temperatures required for device surface-mounting. The SNAPHAT®housing is keyed to prevent reverse insertion.The SOIC and battery/crystal packages are shipped separately in plastic anti-static tubes or in tape \u0026 reel form. For the 28-lead SOIC, the battery/crystal package (e.g., SNAPHAT®) part number is M4T28-BR12SH or M4T32-BR12SH .