M48T02:5.0 V, 16 Kbit (2 Kb x 8) TIMEKEEPER® SRAM

The M48T02/12 TIMEKEEPER®RAM is a 2 Kb x 8 non-volatile static RAM and real-time clock which is pin and functional compatible with the DS1642.

A special 24-pin, 600 mil DIP CAPHATpackage houses the M48T02/12 silicon with a quartz crystal and a long life lithium button cell to form a highly integrated battery-backed memory and real-time clock solution.

The M48T02/12 button cell has sufficient capacity and storage life to maintain data and clock functionality for an accumulated time period of at least 10 years in the absence of power over the operating temperature range.

The M48T02/12 is a non-volatile pin and function equivalent to any JEDEC standard 2 Kb 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.

Key Features

  • Integrated, ultra low power SRAM, real-time clock, and power-fail control circuit
  • BYTEWIDE™ RAM-like clock access
  • BCD coded year, month, day, date, hours, minutes, and seconds
  • Typical clock accuracy of ±1 minute a month, at 25 °C
  • Software controlled clock calibration for high accuracy applications
  • Automatic power-fail chip deselect and WRITE protection
  • WRITE protect voltages (VPFD = power-fail deselect voltage):
    • M48T02: VCC = 4.75 to 5.5 V; 4.5 V ≤ VPFD ≤ 4.75 V
    • M48T12: VCC = 4.5 to 5.5 V; 4.2 V ≤ VPFD ≤ 4.5 V
  • Self-contained battery and crystal in the CAPHAT™ DIP package
  • Pin and function compatible with JEDEC standard 2 K x 8 SRAMs
  • RoHS compliant
    • Lead-free second level interconnect
产品规格
DescriptionVersionSize
DS0493: 5.0 V, 16 Kbit (2 Kb X 8) TIMEKEEPER® SRAM9.2374 KB
应用手册
DescriptionVersionSize
AN1011: ST NVRAM 和实时时钟(RTC)产品中使用的电池技术4.0416 KB
AN934: How to use the digital calibration feature in TIMEKEEPER® and serial real-time clock (RTC) products4.1123 KB
AN923: Managing century information using serial real-time clocks and TIMEKEEPER® NVRAMs4.0142 KB
AN1009: Negative undershoot NVRAM data corruption2.082 KB
AN1012: 预测NVRAM 和串行RTC 的电池寿命和数据保存期限4.1813 KB
AN925: Time update in ST's TIMEKEEPER® devices2.0119 KB
AN968: VMEbus TIMEKEEPER® requirements2.094 KB
Product Certifications
DescriptionVersionSize
Products Underwriter Laboratories (UL) Information2.1162 KB
样片和购买
型号PackagePacking TypeQuantityECCN (EU)ECCN (US)Country of Origin
M48T02-150PC1PDIP 24 .7Tube1000NECEAR99MALAYSIA
M48T02-70PC1PDIP 24 .7Tube1000NECEAR99MALAYSIA
质量和可靠性
型号PackageGradeRoHS Compliance GradeMaterial Declaration**
M48T02-150PC1PDIP 24 .7IndustrialEcopack1
M48T02-70PC1PDIP 24 .7IndustrialEcopack1
5.0 V, 16 Kbit (2 Kb X 8) TIMEKEEPER® SRAM M48T02
circuit_diagram_2410_thumbnail.png M48T02
ST NVRAM 和实时时钟(RTC)产品中使用的电池技术 M4Z28-BR00SH
How to use the digital calibration feature in TIMEKEEPER® and serial real-time clock (RTC) products M41T60
Managing century information using serial real-time clocks and TIMEKEEPER® NVRAMs M41T60
Negative undershoot NVRAM data corruption M48Z58Y
预测NVRAM 和串行RTC 的电池寿命和数据保存期限 M4Z28-BR00SH
Time update in ST's TIMEKEEPER® devices M48T37Y
VMEbus TIMEKEEPER® requirements M48T37Y
Predicting the battery life and data retention period of NVRAMs and serial RTCs M48Z58Y