Description

The M41T315Y/V/W RTC Supervisor is a combination of a CMOS TIMEKEEPER? and a nonvolatile memory supervisor. Power is constantly monitored by the memory supervisor. In the event of power instability or absence, an external battery maintains the timekeeping operation and provides power for a CMOS static RAM by switching on and invoking write protection to prevent data corruption in the memory and RTC.

Features

■ 3.0V, 3.3V, or 5V operating voltage

■ Real-time clock keeps track of tenths/hundredths of seconds, seconds, minutes, hours, days, date of the month, months, and years

■ Automatic leap year correction valid up to 2100

■ Automatic switch-over and deselect circuitry

■ Choice of power-fail deselect voltages: (VPFD = power-fail deselect voltage)

– M41T315Y(a): VCC = 4.5 to 5.5V 4.25V ≤ VPFD ≤ 4.50V

– M41T315V: VCC = 3.0 to 3.6V 2.80V ≤ VPFD ≤ 2.97V

– M41T315W: VCC = 2.7 to 3.3V 2.60V ≤ VPFD ≤ 2.70V

■ No address space required to communicate with RTC

■ Provides nonvolatile supervisor functions for battery backup of SRAM

■ Full ±10 VCC operating range

■ Industrial operating temperature range (–40 to +85°C)

■ Ultra-low battery supply current of 500nA (max)

■ Optional packaging includes A 28-lead SOIC and SNAPHAT? top (to be ordered separately)

■ SNAPHAT package provides direct connection for a snaphat top, which contains the battery and crystal

■ RoHS compliant

– Lead-free second level interconnect

M41T315V-85MH6E屬于集成電路（IC） > 實時時鐘。意法半導體（ST）集團制造生產(chǎn)的M41T315V-85MH6E實時時鐘實時時鐘 (RTC) 為幾乎所有需要保持精確時間的電子設備提供時間和/或日期信息。時鐘類型有二進制計數(shù)器、時鐘/日歷/監(jiān)控器、歷時計時器、幻時鐘芯片、便攜式系統(tǒng)控制器、溫度記錄器、時間事件記錄器和計時器時鐘外設。其包含 2 B 至 2 MB 不等的存儲器，接口選項有 I2C、并行、串行、SPI、1 線式、2 線式、3 線式和 4 線式。