Description

The M48T201Y/V are self-contained devices that include a real time clock (RTC), programmable alarms, a watchdog timer, and a square wave output which provides control of up to 512 K x 8 of external low-power static RAM. Access to all RTC functions and the external RAM is the same as conventional bytewide SRAM. The 16 TIMEKEEPER? registers offer year, month, date, day, hour, minute, second, calibration, alarm, century, watchdog, and square wave output data. Externally attached static RAMs are controlled by the M48T201Y/V via the GCON and ECON signals.

Features

■ Converts low power SRAM into NVRAMs

■ Year 2000 compliant

■ Battery low flag

■ Integrated real time clock, power-fail control circuit, battery and crystal

■ Watchdog timer

■ Choice of write protect voltages (VPFD = power-fail deselect voltage):

– M48T201Y: VCC = 4.5 to 5.5 V 4.1V ≤ VPFD ≤ 4.5 V

– M48T201V: VCC = 3.0 to 3.6 V 2.7 V ≤ VPFD ≤ 3.0 V

■ Microprocessor power-on reset (valid even during battery backup mode)

■ Programmable alarm output active in the battery backed-up mode

■ Packaging includes a 44-lead SOIC and SNAPHAT? top (to be ordered separately)

■ SOIC package provides direct connection for a SNAPHAT? top which contains the battery and crystal

■ RoHS compliant

– Lead-free second level interconnect

M48T201V-85MH1屬于集成電路（IC） > 實(shí)時時鐘。意法半導(dǎo)體（ST）集團(tuán)制造生產(chǎn)的M48T201V-85MH1實(shí)時時鐘實(shí)時時鐘 (RTC) 為幾乎所有需要保持精確時間的電子設(shè)備提供時間和/或日期信息。時鐘類型有二進(jìn)制計(jì)數(shù)器、時鐘/日歷/監(jiān)控器、歷時計(jì)時器、幻時鐘芯片、便攜式系統(tǒng)控制器、溫度記錄器、時間事件記錄器和計(jì)時器時鐘外設(shè)。其包含 2 B 至 2 MB 不等的存儲器，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。