STMicroelectronics M48T08-150PC1 NVRAM, 150ns, 5V 28-Pin PCDIP

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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 & reel form. For the 28-lead SOIC, the battery/crystal package (e.g., SNAPHAT®) part number is “M4T28-BR12SH” or “M4T32-BR12SH”.

規格
Attribute Value
Organisation 8K x 8 bit
Interface Type Parallel
Maximum Random Access Time 150ns
Mounting Type Through Hole
Package Type PCDIP
Pin Count 28
Dimensions 39.98 x 18.34 x 8.89mm
Length 39.88mm
Width 18.34mm
Height 8.89mm
Maximum Operating Supply Voltage 5.5 V
Maximum Operating Temperature +70 °C
Minimum Operating Supply Voltage 4.75 V
Minimum Operating Temperature 0 °C
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