产品概述
描述
The M48T35/Y TIMEKEEPER®RAM is a 32 Kb x 8 non-volatile static RAM and real-time clock. The monolithic chip is available in two special packages to provide a highly integrated battery-backed memory and real-time clock solution.
The M48T35/Y is a non-volatile pin and function equivalent to any JEDEC standard 32 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.
The 28-pin, 600 mil DIP CAPHAT™houses the M48T35/Y 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”.
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所有功能
- Integrated, ultra low power SRAM, real-time clock, power-fail control circuit and battery
- BYTEWIDE™RAM-like clock access
- BCD coded year, month, day, date, hours, minutes, and seconds
- Frequency test output for real-time clock
- Automatic power-fail chip deselect and WRITE protection
- WRITE protect voltages VPFD= power-fail deselect voltage):
- M48T35: VCC= 4.75 to 5.5 V; 4.5 V ≤ VPFD≤ 4.75 V
- M48T35Y: VCC= 4.5 to 5.5 V; 4.2 V ≤ VPFD≤ 4.5 V
- Self-contained battery and crystal in the CAPHAT™DIP package
- SOIC package provides direct connection for a SNAPHAT® housing containing the battery and crystal
- SNAPHAT® housing (battery and crystal) is replaceable
- Pin and function compatible with JEDEC standard 32 Kb x 8 SRAMs
- RoHS compliant
- Lead-free second level interconnect
电路原理图
EDA符号、封装和3D模型
意法半导体 - M48T35
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符号
封装
3D模型
所有资源
| 资源标题 | 版本 | 更新时间 |
|---|
IBIS models (2)
| 资源标题 | 版本 | 更新时间 | ||
|---|---|---|---|---|
| ZIP | 1.0 | 01 Aug 2015 | 01 Aug 2015 | |
| ZIP | 1.0 | 01 Aug 2015 | 01 Aug 2015 |
质量与可靠性
| 产品型号 | Marketing Status | 包 | 等级规格 | 符合RoHS级别 | Longevity Commitment | Longevity Starting Date | 材料声明** |
|---|---|---|---|---|---|---|---|
| M48T35-70PC1 | 批量生产 | PDIP 28 .7 | 工业 | Ecopack2 | - | - | |
M48T35-70PC1
Package:
PDIP 28 .7Material Declaration**:
(**) 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 | 供货状态 | Budgetary Price (US$)*/Qty | 从ST订购 | Order from distributors | 包 | 包装类型 | RoHS | Country of Origin | ECCN (US) | ECCN (EU) | Operating temperature (°C) | Operating Temperature (°C) (max) | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 最小值 | 最大值 | |||||||||||||
| M48T35-70PC1 | | | distributors 无法联系到经销商，请联系我们的销售办事处 | |||||||||||
M48T35-70PC1 批量生产