SUMMARY DESCRIPTION

The M48T35/Y TIMEKEEPER® RAM is a 32Kb x 8 non-volatile static RAM and real time clock. The monolithic chip is available in two special packages to provide a highly integrated battery backed-up memory and real time clock solution.

FEATURES SUMMARY

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

■ BYTEWIDE™ RAM-LIKE CLOCK ACCESS

■ BCD CODED YEAR, MONTH, DAY, DATE, HOURS, MINUTES, AND SECONDS

■ FREQUENCY TEST OUTPUT FOR REAL TIME CLOCK

■ AUTOMATIC POWER-FAIL CHIP DESELECT AND WRITE PROTECTION

■ WRITE PROTECT VOLTAGES (VPFD = Power-fail Deselect Voltage):

– M48T35: VCC = 4.75 to 5.5V 4.5V ≤ VPFD ≤ 4.75V

– M48T35Y: VCC = 4.5 to 5.5V 4.2V ≤ VPFD ≤ 4.5V

■ SELF-CONTAINED BATTERY AND CRYSTAL IN THE CAPHAT™ DIP PACKAGE

■ SOIC PACKAGE PROVIDES DIRECT CONNECTION FOR A SNAPHAT® HOUSING CONTAINING THE BATTERY AND CRYSTAL

■ SNAPHAT® HOUSING (BATTERY AND CRYSTAL) IS REPLACEABLE

■ PIN AND FUNCTION COMPATIBLE WITH JEDEC STANDARD 32 Kb x 8 SRAMs

■ RoHS COMPLIANCE

Lead-free components are compliant with the RoHS Directive.

M48T35Y属于集成电路（IC） > 实时时钟。意法半导体（ST）集团制造生产的M48T35Y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。