M48T248Y集成电路（IC）的实时时钟规格书PDF中文资料

M48T248Y属于集成电路（IC）的实时时钟。由意法半导体集团制造生产的M48T248Y实时时钟实时时钟 (RTC) 为几乎所有需要保持精确时间的电子设备提供时间和/或日期信息。时钟类型有二进制计数器、时钟/日历/监控器、历时计时器、幻时钟芯片、便携式系统控制器、温度记录器、时间事件记录器和计时器时钟外设。其包含 2 B 至 2 MB 不等的存储器，接口选项有 I2C、并行、串行、SPI、1 线式、2 线式、3 线式和 4 线式。

SUMMARY DESCRIPTION

The M48T248Y/V TIMEKEEPER® RAM is a 128Kbit x 8 non-volatile static RAM and real time clock organized as 131,072 words by 8 bits.

FEATURES SUMMARY

■ 5.0V OR 3.3V 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 THE YEAR 2100

■ AUTOMATIC SWITCH-OVER AND

DESELECT CIRCUITRY

■ CHOICE OF POWER-FAIL DESELECT

VOLTAGES:

(VPFD = Power-fail Deselect Voltage):

– M48T248Y: 4.25V ≤ VPFD ≤ 4.50V

– M48T248V: 2.80V ≤ VPFD ≤ 2.97V

■ FULL 10 VCC OPERATING RANGE

■ OVER 10 YEARS’ DATA RETENTION IN

THE ABSENCE OF POWER

■ WATCH FUNCTION IS TRANSPARENT TO

RAM OPERATION

■ 128K x 8 NV SRAM DIRECTLY REPLACES

VOLATILE STATIC RAM OR EEPROM