Summary description

The M48T58/Y TIMEKEEPER? RAM is a 8Kb 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

■ 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):

– M48T58: VCC = 4.75 to 5.5V 4.5V ≤ VPFD ≤ 4.75V

– M48T58Y: VCC = 4.5 to 5.5V 4.2V ≤ VPFD ≤ 4.5V

■ Self-contained battery and crystal in the CAPHAT? dip package

■ Packaging includes a 28-lead SOIC and SNAPHAT? top (to be ordered separately)

■ SOIC package provides direct connection for a snaphat housing containing the battery and crystal

■ Pin and function compatible with JEDEC standard 8 Kb x8 SRAMs

■ RoHS compliant

– Lead-free second level interconnect

M48T58Y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M48T58Y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(lèi)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。