DESCRIPTION

The M48T212Y/V are self-contained devices that include a real time clock (RTC), programmable alarms, a watchdog timer, and two external chip enable outputs which provide control of up to four (two in parallel) external low-power static RAMs.

FEATURES SUMMARY

■ INTEGRATED REAL TIME CLOCK,

POWERFAIL CONTROL CIRCUIT, BATTERY AND

CRYSTAL

■ CONVERTS LOW POWER SRAM INTO

NVRAMs

■ YEAR 2000 COMPLIANT (4-Digit Year)

■ BATTERY LOW FLAG

■ MICROPROCESSOR POWER-ON RESET

■ PROGRAMMABLE ALARM OUTPUT

ACTIVE IN THE BATTERY BACKED-UP

MODE

■ WATCHDOG TIMER

■ AUTOMATIC POWER-FAIL CHIP

DESELECT AND WRITE PROTECTION

■ CHOICE OF WRITE PROTECT VOLTAGES

(VPFD = Power-fail Deselect Voltage):

– M48T212Y: VCC = 4.5 to 5.5V

4.2V ≤ VPFD ≤ 4.5V

– M48T212V: VCC = 3.0 to 3.6V

2.7V ≤ VPFD ≤ 3.0V

■ PACKAGING INCLUDES A 44-LEAD SOIC

AND SNAPHAT® TOP (to be ordered

separately)

M48T212V-85MH1F属于集成电路（IC） > 实时时钟。意法半导体（ST）集团制造生产的M48T212V-85MH1F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。