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.

M48T35屬于集成電路（IC） > 實(shí)時(shí)時(shí)鐘。意法半導(dǎo)體（ST）集團(tuán)制造生產(chǎn)的M48T35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。