PT7C4302中文资料3-wire interface RTC with 31Byte NVRAM数据手册Diodes规格书

描述 Description

The PT7C4302 serial real-time clock is a lowpowerclock/calendar with a programmable square-waveoutput and 31 bytes of nonvolatile RAM.Address and data are transferred serially via a 3-wire bus. The clock/calendar provides seconds, minutes,hours, day, date, month, and year information. The dateat the end of the month is automatically adjusted formonths with fewer than 31 days, including correctionsfor leap year. The clock operates in either the 24-hour or12-hour format with AM/PM indicator.Table 1 shows the basic functions of PT7C4302.More details are shown in section: overview of functions.

特性 Features

Using external 32.768kHz quartz crystal
Real-time clock (RTC) counts seconds, minutes, hours, date of the month, month, day of the week, and year with leap-year compensation valid up to 2099
31-byte, nonvolatile (NV) RAM for data storage
Time keeping voltage: 1.5V to 5.5V
Uses less than 300nA at 2.0V
Simple 3-wire interface
Serial I/O for minimum pin count
Burst mode for reading/writing successive addresses in clock/RAM
TTL-compatible (VCC = 5V)
Optional industrial temperature range: -40°C to +85°C
Battery backup
Trickle charger on chip for rechargeable energy source backup

简介

PT7C4302属于集成电路（IC）的实时时钟。由制造生产的PT7C4302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。