产品概述
描述
The M48T129Y/V TIMEKEEPER® RAM is a 128 Kb x 8 non-volatile static RAM and real-time clock with programmable alarms and a watchdog timer. The special DIP package provides a fully integrated battery-backed memory and real-time clock solution. The M48T129Y/V directly replaces industry standard 128 Kb x 8 SRAM. It also provides the non-volatility of Flash without any requirement for special WRITE timing or limitations on the number of WRITEs that can be performed.
The 32-pin, 600 mil DIP hybrid houses a controller chip, SRAM, quartz crystal, and a long-life lithium button cell in a single package.
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所有功能
- Integrated, ultra low power SRAM, real-time clock, power-fail control circuit, battery, and crystal
- BCD coded century, year, month, day, date, hours, minutes, and seconds
- Battery low warning flag
- Automatic power-fail chip deselect and WRITE protection
- Two WRITE protect voltages: (VPFD= power-fail deselect voltage)
- M48T129Y: VCC= 4.5 to 5.5 V; 4.2 V ≤ VPFD≤ 4.5 V
- M48T129V: VCC= 3.0 to 3.6 V; 2.7 V ≤ VPFD≤ 3.0 V
- Conventional SRAM operation; unlimited WRITE cycles
- Software controlled clock calibration for high accuracy applications
- 10 years of data retention and clock operation in the absence of power
- Self-contained battery and crystal in DIP package
- Microprocessor power-on reset (valid even during battery backup mode)
- Programmable alarm output active in battery backup mode
- RoHS compliant
- Lead-free second level interconnect
EDA符号、封装和3D模型
意法半导体 - M48T129Y
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