ST Life.augmented

M48T37V

5.0 or 3.3 V, 256 Kbit (32 Kbit x 8) TIMEKEEPER® SRAM
  • active 活性

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”.

pdf Please read
Errata Sheet
pdf 下载
数据表

Key Features

  • Integrated ultra low power SRAM, real-time clock, power-fail control circuit, and battery
  • Frequency test output for real-time clock software calibration
  • Automatic power-fail chip deselect and WRITE protection
  • Watchdog timer
  • WRITE protect voltage (VPFD= Power-fail deselect voltage):
  • M48T37Y: VCC= 4.5 to 5.5 V 4.2 V ≤ VPFD≤ 4.5 V
  • M48T37V: VCC= 3.0 to 3.6 V 2.7 V ≤ VPFD≤ 3.0 V
  • Packaging includes a 44-lead SOIC and SNAPHAT®top (to be ordered separately)
  • SOIC package provides direct connection for a SNAPHAT®top which contains the battery and crystal
  • Microprocessor power-on reset (valid even during battery backup mode)
  • Programmable alarm output active in the battery backup mode
  • Battery low flag
  • RoHS compliant
  • Lead-free second level interconnect

线路 图表

图案 资源

顶部

Technical Documentation

Product Specifications

描述 版本 大小
pdf
DS1898: 5.0 or 3.3 V, 256 Kbit (32 Kbit x 8) TIMEKEEPER® SRAM
9.1 508 KB

Application Notes

描述 版本 大小
pdf
AN1009: Negative undershoot NVRAM data corruption
2.0 82 KB
pdf
AN1011: Battery technology used in NVRAM and real-time clock (RTC) products from ST
4.0 248 KB
pdf
AN1012: Predicting the battery life and data retention period of NVRAMs and serial RTCs
4.0 439 KB
pdf
AN1216: Implementing a periodic alarm with TIMEKEEPER® and serial real-time clocks (RTCs)
2.0 193 KB
pdf
AN923: Managing century information using serial real-time clocks and TIMEKEEPER® NVRAMs
3.0 195 KB
pdf
AN925: Time update in ST's TIMEKEEPER® devices
2.0 120 KB
pdf
AN934: How to use the digital calibration feature in TIMEKEEPER® and serial real-time clock (RTC) products
4.1 123 KB
pdf
AN968: VMEbus TIMEKEEPER® requirements
2.0 95 KB

HW Model & CAD Libraries

HW Model & CAD Libraries

描述 版本 大小
zip
Ibis model
2.1 15 KB

Quality & Reliability

Product Certification

描述 版本 大小
pdf
Products Underwriter Laboratories (UL) Information
1.0 543 KB

样品 & 购买

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产品型号 Marketing StatusPackagePacking TypeOperating Temperature (min) Operating Temperature (max) Automotive GradeOrder From STUnit Price (US$)*
@ 1000
Distributor AvailabilityRoHS Compliance GradeDownload
Material Declaration**
M48T37V-10MH1FActiveSO-44Tape And Reel070_-12.046Distributor reported inventory date: 2014-09-01
Distributor NameRegionStockMin. order
ARROWOrder NowAMERICA936936
ARROWOrder NowEUROPE9360
DIGIKEYOrder NowWORLDWIDE7581
FUTUREOrder NowWORLDWIDE16011
Ecopack1PDF
XML

(*) 建议零售价格仅用于预算,以美元为单位,每。的报价,以当地货币计算的价格,请联系您当地的 ST 销售办事处 或我们的 分销商
(**) 材料声明表格上提供st.com可以是一般的文件,根据最常用的包,包内的家庭。出于这个原因,他们可能不是100%准确,对于一个特定的设备。请联系我们 销售支持 在特定设备上的信息。
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