DS1340C数据手册集成电路（IC）的实时时钟规格书PDF

描述 Description

The DS1340 is a real-time clock (RTC)/calendar that is pin compatible and functionally equivalent to the ST M41T00, including the software clock calibration. The device additionally provides trickle-charge capability on the VBACKUP pin, a lower timekeeping voltage, and an oscillator STOP flag. Block access of the register map is identical to the ST device. Two additional registers, which are accessed individually, are required for the trickle charger and flag. The clock/calendar provides seconds, minutes, hours, day, date, month, and year information. A built-in power-sense circuit detects power failures and automatically switches to the backup supply. The device is programmed serially through an I²C bidirectional bus.

特性 Features

·Enhanced Second Source for the ST M41T00
· Completely Manages All Timekeeping Functions
· RTC Counts Seconds, Minutes, Hours, Day, Date,
Month, and Year
· Software Clock Calibration
· Oscillator Stop Flag
·Low-Power Operation Extends Battery Backup Run Time
·Low Timekeeping Voltage Down to 1.3V
· Automatic Power-Fail Detect and Switch Circuitry
· Trickle-Charge Capability
· Three Operating Voltage Ranges (1.8V, 3V, and 3.3V) Supports Systems Using Legacy and Modern Power Buses
· Surface-Mount Package with an Integrated Crystal (DS1340C) Saves Additional Space and Simplifies Design
· Simple Serial Port Interfaces with Most Microcontrollers
· Fast (400kHz) I2C Interface
·8-Pin µSOP or SO Package Minimizes Required Space
· Underwriters Laboratories (UL®) Recognized

应用 Application

·医疗装置
·销售终端机(POS)装置
·便携式仪表
·电信

简介

DS1340C属于集成电路（IC）的实时时钟。由制造生产的DS1340C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。