V3021中文資料Ultra Low Power 1-Bit 32kHz RTC, 0.8uA standby current, up to +125°C數(shù)據(jù)手冊(cè)EM Microelectronic規(guī)格書(shū)

描述 Description

The V3021 is a low power CMOS real time clock. Data is transmitted serially as 4 address bits and 8 data bits, over one line of a standard parallel data bus. The device is accessed by chip select (/CS) with read and write control timing provided by either /RD and /WR pulse (Intel CPU) or /DS with advanced R/W (Motorola CPU). Data can also be transmitted over a conventional 3 wire serial interface having CLK, data I/O and strobe. The V3021 has no busy states and there is no danger of a clock update while accessing. Supply current is typically 800nA at VDD = 3.0V. Battery operation is supported by complete functionality down to 2.0V. The oscillator stability is typically 0.3 ppm/V.
Solutions
·Utility meters
·Battery operated and portable equipment
·Consumer electronics
·White/brown goods
·Pay phones
·Cash registers
·Personal computers
·Programmable controller systems
·Data loggers
·Automotive electronics

特性 Features

·Supply current typically 800nA at 3V
·50ns access time with 50pF load capacitance
·Fully operational from 2.0V to 5.5V
·No busy states or danger of a clock update while accessing
·Serial communication on one line of a standard parallel data bus or over a conventional 3 wire serial interface
·Interface compatible with both Intel and Motorola
·Seconds, minutes, hours, day of month, month, year, week day and week number in BCD format
·Leap year and week number correction
·Time set lock mode to prevent unauthorized setting of the current time or date
·Oscillator stability 0.3 ppm/volt
·No external capacitor needed
·Frequency measurement and test modes
·Temperature range - 40 to +85°C
·On request extented temperature range -40 to +125°C
·Packages DIP8 and SO8

簡(jiǎn)介

V3021屬于集成電路（IC）的實(shí)時(shí)時(shí)鐘。由EM Microelectronic制造生產(chǎn)的V3021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(xiàn)式、2 線(xiàn)式、3 線(xiàn)式和 4 線(xiàn)式。