BQ3287EA 具有 242x8 NVSRAM 和警报唤醒功能的 RTC 模块，在 EA 版本上具有 RAM 清零输入
BQ3287EA 描述
The CMOS bq3287E/bq3287EA is a low-power microprocessor peripheral providing a time-of-day clock and 100-year calendar with alarm features and battery operation. Other 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 bq3287EA version is identical to the bq3287E, with the addition of the RAM clear input.
The bq3287E is a fully compatible real-time clock for IBM AT-compatible computers and other applications. The bq3287E write-protects the clock, calendar, and storage registers during power failure
|
BQ3287 |
BQ3287A |
BQ3287E |
BQ3287EA |
BQ4287 |
| Supply Voltage(V) |
5 |
5 |
5 |
5 |
5 |
| Bus Interface |
Multiplexed |
Multiplexed |
Multiplexed |
Multiplexed |
Multiplexed |
| Memory Density(Kb) |
0.114 |
0.114 |
0.242 |
0.242 |
0.114 |
| Operating Temperature Range(°C) |
-20 to 70,0 to 70 |
-20 to 70,0 to 70 |
0 to 70 |
0 to 70 |
0 to 70 |
| Pin/Package |
24DIP MODULE |
24DIP MODULE |
24DIP MODULE |
24DIP MODULE |
24DIP MODULE |
| Approx. Price (US$) |
4.20 | 1ku |
4.20 | 1ku |
4.20 | 1ku |
4.20 | 1ku |
5.80 | 1ku |
| RTC Bytes |
14 |
14 |
14 |
14 |
14 |
BQ3287EA 特性
- Direct clock/calendar replacement for IBM\xAE AT-compatible computers and other applications
- Functionally compatible with the DS1287/DS1287A and MC146818A/ MC146818B
- 242 bytes of general nonvolatile storage
- Provides a 32.768kHz output for power management
- System wake-up capability-alarm interrupt active in battery-backup mode
- Integral lithium cell and crystal
- 160 ns cycle time allows fast bus operation
- 14 bytes for clock/calendar and control
- Time of day in seconds, minutes, and hours
- 12- or 24-hour format
- Optional daylight saving adjustment
- Calendar in day of the week, day of the month, months, and years with automatic leap year 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
- Better than one minute per month clock accuracy
BQ3287EA 芯片订购指南
| 器件 |
状态 |
温度 (oC) |
价格（美元） |
封装 | 引脚 |
封装数量 | 封装载体 |
丝印标记 |
| BQ3287EAMT |
ACTIVE |
0 to 70 |
4.20 | 1ku |
DIP MODULE (MT) | 24 |
15 |
|
BQ3287EA 质量与无铅数据
| 器件 |
环保计划* |
铅/焊球涂层 |
MSL 等级/回流焊峰 |
环保信息与无铅 (Pb-free) |
DPPM / MTBF / FIT 率 |
| BQ3287EAMT |
Pb-Free (RoHS) |
Call TI |
N/A for Pkg Type |
BQ3287EAMT |
BQ3287EAMT |
BQ3287EA 应用技术支持与电子电路设计开发资源下载
- BQ3287EA 数据资料 dataSheet 下载.PDF
- TI 德州仪器实时时钟产品选型与价格 . xls
- PowerPADTM Thermally Enhanced Package
(PDF 1040 KB)
- 全面认识开关型电源中的BUCK-BOOST功率级 (Rev. A)
(PDF 2206 KB)
- Shelf-Life Evaluation of Lead-Free Component Finishes (PDF 1305 KB)
- PowerPADTM Made Easy (PDF 57 KB)
- 标准线性产品交叉参考 (Rev. D)
(PDF 1058 KB)
- 模数规格和性能特性术语表 (Rev. A) (PDF 1993 KB)
- 所选封装材料的热学和电学性质 (PDF 645 KB)
- 高速数据转换 (PDF 1967 KB)
BQ3287EA 相关工具
| 名称 |
型号 |
公司 |
工具/软件类型 |
| BQ3287EA 评估模块 |
BQ3287EAEVM |
Texas Instruments |
开发电路板/EVM |