产品概述
描述
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 CAPHAT™package 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.
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所有功能
- 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
电路原理图
EDA符号、封装和3D模型
STMicroelectronics - M48T12
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符号
封装
3D模型
质量与可靠性
| 产品型号 | Marketing Status | 封装 | 等级规格 | 符合RoHS级别 | 材料声明** |
|---|---|---|---|---|---|
| M48T12-150PC1 |
批量生产
|
PDIP 24 .7 | 工业 | Ecopack2 (**) | |
| M48T12-70PC1 |
批量生产
|
PDIP 24 .7 | 工业 | Ecopack2 (**) |
(**) st.com上提供的材料声明表单可能是基于包装系列中最常用的封装的通用文档。因此，它们可能不是100%适用于特定的设备。有关特定设备的信息，请联系 销售支持。
样片和购买
| 产品型号 | 从分销商订购 | 从ST订购 | 供货状态 | ECCN (US) | ECCN (EU) | 包装类型 | 封装 | 温度（ºC） | Country of Origin | Budgetary Price (US$)*/Qty | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 最小值 | 最大值 | |||||||||||
| M48T12-70PC1 | 3 distributors | Buy Direct |
批量生产
|
EAR99 | NEC | Tube | PDIP 24 .7 | 0 | 70 | MALAYSIA | ||
| M48T12-150PC1 | 5 distributors | Buy Direct |
批量生产
|
EAR99 | NEC | Tube | PDIP 24 .7 | 0 | 70 | MALAYSIA | ||
