BQ3285ES 供应商
BQ3285ES 属性参数
- 产品培训模块：Clock Basics in 10 minutes or less
- 标准包装：25
- 类别：集成电路 (IC)
- 家庭：时钟/计时 - 实时时钟
- 系列：-
- 类型：时钟/日历
- 特点：警报器，夏令时，闰年，NVSRAM，方波输出
- 存储容量：242B
- 时间格式：HH:MM:SS（12/24 小时）
- 数据格式：YY-MM-DD-dd
- 接口：并联
- 电源电压：4.5 V ~ 5.5 V
- 电压 - 电源，电池：2.5 V ~ 4 V
- 工作温度：0°C ~ 70°C
- 安装类型：表面贴装
- 封装/外壳：24-SOIC（0.295"，7.50mm 宽）
- 供应商设备封装：24-SOIC
- 包装：管件
- 其它名称：296-2596-5
产品特性
- Direct clock/calendar replacement for IBM® AT-compatible computers and other applications
- Functionally compatible with the DS1285 Closely matches MC146818A pin configuration
- Closely matches MC146818A pin configuration
- 2.7–3.6V operation (bq3285L); 4.5–5.5V operation (bq3285E)
- 242 bytes of general nonvolatile storage
- 32.768kHz output for power management
- System wake-up capability—alarm interrupt output active in battery-backup mode
- Less than 0.5µA load under battery operation
- Selectable Intel or Motorola bus timing
- 14 bytes for clock/calendar and control
- BCD or binary format for clock and calendar data
- Calendar in day of the week, day of the month, months, and years, with automatic leap-year adjustment
- Time of day in seconds, minutes, and hours 12- or 24-hour format Optional daylight saving adjustment
- 12- or 24-hour format
- Optional daylight saving adjustment
- Programmable square wave output
- Three individually maskable interrupt event flags: Periodic rates from 122us to 500ms Time-of-day alarm once per second to once per day End-of-clock update cycle
- Periodic rates from 122us to 500ms
- Time-of-day alarm once per second to once per day
- End-of-clock update cycle
- 24-pin plastic DIP, SOIC, or SSOP
产品概述
The CMOS bq3285E/L is a low-power microprocessor peripheral providing a time-of-day clock and 100-year calendar with alarm features and battery operation. The bq3285L supports 3V systems. Other bq3285E/L features include three maskable interrupt sources, square-wave output, and 242 bytes of general nonvolatile storage.A 32.768kHz output is available for sustaining power-management activities. Wake-up capability is provided by an alarm interrupt, which is active in battery-backup mode.The bq3285E/L write-protects the clock, calendar, and storage registers during power failure. A backup battery then maintains data and operates the clock and calendar.The bq3285E/L is a fully compatible real-time clock for IBM AT-compatible computers and other applications. The only external components are a 32.768kHz crystal and a backup battery.
BQ3285ES