The M48T37Y/V TIMEKEEPER®RAM is a 32 Kb x 8 non-volatile static RAM and real-time clock. The monolithic chip is available in a special package which provides a highly integrated battery-backed memory and real-time clock solution.
The 44-lead, 330 mil SOIC package 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/crystal 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 packages are shipped separately in plastic anti-static tubes or in tape & reel form. For the 44-lead SOIC, the battery/crystal package (e.g., SNAPHAT) part number is “M4T28-BR12SH” or “M4T32-BR12SH”.
|DS1898: 5.0 or 3.3 V, 256 Kbit (32 Kbit x 8) TIMEKEEPER® SRAM||9.1||508 KB|
|AN1011: Battery technology used in NVRAM and real-time clock (RTC) products from ST||4.0||248 KB|
|AN934: How to use the digital calibration feature in TIMEKEEPER® and serial real-time clock (RTC) products||4.1||123 KB|
|AN1216: Implementing a periodic alarm with TIMEKEEPER® and serial real-time clocks (RTCs)||2.0||192 KB|
|AN923: Managing century information using serial real-time clocks and TIMEKEEPER® NVRAMs||4.0||142 KB|
|AN1009: Negative undershoot NVRAM data corruption||2.0||82 KB|
|AN1012: Predicting the battery life and data retention period of NVRAMs and serial RTCs||4.1||439 KB|
|AN925: Time update in ST's TIMEKEEPER® devices||2.0||119 KB|
|AN968: VMEbus TIMEKEEPER® requirements||2.0||94 KB|
|Ibis model||1.0||15 KB|
|Products Underwriter Laboratories (UL) Information||2.1||543 KB|
|Part Number||Package||Packing Type||Marketing Status||Quantity||ECCN (EU)||ECCN (US)||Country of Origin||More info||Order from ST||Order from Distributors|
|M48T37V-10MH1F||SO-44||Tape And Reel||Active : Product is in volume production||1000||NEC||EAR99||MALAYSIA||MORE INFO||DISTRIBUTOR AVAILABILITY|
|Part Number||Marketing Status||Package||Grade||RoHS Compliance Grade||Material Declaration**|
(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.