M48T129V集成電路（IC）的實(shí)時(shí)時(shí)鐘規(guī)格書(shū)PDF中文資料

M48T129V屬于集成電路（IC）的實(shí)時(shí)時(shí)鐘。由意法半導(dǎo)體集團(tuán)制造生產(chǎn)的M48T129V實(shí)時(shí)時(shí)鐘實(shí)時(shí)時(shí)鐘 (RTC) 為幾乎所有需要保持精確時(shí)間的電子設(shè)備提供時(shí)間和/或日期信息。時(shí)鐘類型有二進(jìn)制計(jì)數(shù)器、時(shí)鐘/日歷/監(jiān)控器、歷時(shí)計(jì)時(shí)器、幻時(shí)鐘芯片、便攜式系統(tǒng)控制器、溫度記錄器、時(shí)間事件記錄器和計(jì)時(shí)器時(shí)鐘外設(shè)。其包含 2 B 至 2 MB 不等的存儲(chǔ)器，接口選項(xiàng)有 I2C、并行、串行、SPI、1 線式、2 線式、3 線式和 4 線式。

DESCRIPTION

The M48T129Y/V TIMEKEEPER RAM is a 128Kb 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 back-up memory and real time clock solution. The M48T129Y/V directly replaces industry standard 128Kb 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.

■ INTEGRATED ULTRA LOW POWER SRAM, REAL TIME CLOCK, POWER-FAIL CONTROL CIRCUIT, BATTERY AND CRYSTAL

■ YEAR 2000 COMPLIANT

■ 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: 4.2V ≤ VPFD ≤ 4.5V

– M48T129V: 2.7V ≤ VPFD ≤ 3.0V

■ 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 back-up mode)

■ PROGRAMMABLE ALARM OUTPUT ACTIVE in BATTERY BACK-UP MODE

■ SURFACE MOUNT CHIP SET PACKAGING INCLUDES a 44-PIN SOIC and a 32-LEAD TSOP (SNAPHAT TOP TO BE ORDERED SEPARATELY)

■ SOIC PACKAGE PROVIDES DIRECT CONNECTION for a SNAPHAT TOP WHICH CONTAINS the BATTERY and CRYSTAL

■ SNAPHAT? HOUSING (BATTERY/CRYSTAL) IS REPLACEABLE