DS1243Y数据手册集成电路（IC）的实时时钟规格书PDF

描述 Description

The DS1243Y 64K NV SRAM with Phantom Clock is a fully static nonvolatile RAM (organized as 8192 words by 8 bits) with a built-in real time clock. The DS1243Y has a self-contained lithium energy source and control circuitry, which constantly monitors VCC for an out-of-tolerance condition. When such a condition occurs, the lithium energy source is automatically switched on and write protection is unconditionally enabled to prevent corrupted data in both the memory and real time clock. The Phantom Clock provides timekeeping information including hundredths of seconds, seconds, minutes, hours, day, date, month, and year information. The date at the end of the month is automatically adjusted for months with fewer than 31 days, including correction for leap years. The Phantom Clock operates in either 24-hour or 12-hour format with an AM/PM indicator.

特性 Features

• Real-Time Clock Keeps Track of Hundredths of Seconds, Seconds, Minutes, Hours, Days, Date of the Month, Months, and Years
• 8k x 8 NV SRAM Directly Replaces Volatile Static RAM or EEPROM
• Embedded Lithium Energy Cell Maintains Calendar Operation and Retains RAM Data
• Watch Function is Transparent to RAM Operation
• Automatic Leap Year Compensation Valid Up to 2100
• Lithium Energy Source is Electrically Disconnected to Retain Freshness Until Power is Applied for the First Time
• Standard 28-Pin JEDEC Pinout
• Full ±10% Operating Range
• Accuracy is Better than ±1 Minute/Month at +25°C
• Over 10 Years of Data Retention in the Absence of Power
• Available in 120ns and 150ns Access Time

简介

DS1243Y属于集成电路（IC）的实时时钟。由制造生产的DS1243Y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。