BQ4822Y RTC 模块，具有 8Kx8 NVSRAM、看门狗定时器、加电复位、中断与低电池电量警告
BQ4822Y 描述
The bq4822Y RTC Module is a non-volatile 65,536-bit SRAM organized as 8192 words by 8 bits with an integral real-time clock and CPU supervisor. The CPU supervisor provides a programmable watchdog timer and a microprocessor reset. Other features include an alarm, power-fail and periodic interrupt, and a battery low warning.
The device combines an internal lithium battery, quartz crystal, clock and power-fail chip, and a full CMOS SRAM in a plastic 28-pin DIP module. The RTC Module directly replaces industry-standard SRAMs and also fits into many EPROM and EEPROM sockets without any requirement for special write timing or limitations on the number of write cycles.
Registers for the real-time clock, alarm and other special functions are located in registers 1FF0h\x961FFFh of the memory array.
|
BQ4822Y |
BQ4830Y |
BQ4832Y |
BQ4842Y |
BQ4850Y |
BQ4852Y |
| Supply Voltage(V) |
5 |
5 |
5 |
5 |
5 |
5 |
| Bus Interface |
Parallel |
Parallel |
Parallel |
Parallel |
Parallel |
Parallel |
| Memory Density(Kb) |
64 |
256 |
256 |
1024 |
4096 |
4096 |
| Operating Temperature Range(°C) |
0 to 70 |
0 to 70 |
0 to 70 |
0 to 70 |
-40 to 85 |
0 to 70 |
| Pin/Package |
28DIP MODULE |
28DIP MODULE |
32DIP MODULE |
32DIP MODULE |
32DIP MODULE |
36DIP MODULE |
| Approx. Price (US$) |
17.25 | 1ku |
14.10 | 1ku |
22.65 | 1ku |
26.30 | 1ku |
31.60 | 1ku |
52.55 | 1ku |
| RTC Bytes |
16 |
8 |
16 |
16 |
8 |
16 |
BQ4822Y 特性
- Integrated SRAM, real-time clock, CPU supervisor, crystal, power-fail circuit, and battery
- Real-Time Clock counts hundredths of seconds through years in BCD format
- RAM-like clock access
- Compatible with industry-standard 8K x 8 SRAMs
- Unlimited write cycles
- 10-year minimum data retention and clock operation in the absence of power
- Automatic power-fail chip deselect and write-protection
- Watchdog timer, power-on reset, alarm/periodic interrupt, power-fail and battery-low warning
- Automatic leap year adjustment
- Software clock calibration for greater than ±1 minute per month accuracy
BQ4822Y 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 |
| BQ4822YMA-70 |
ACTIVE |
0 to 70 |
17.25 | 1ku |
DIP MODULE (MA) | 28 |
14 |
|
BQ4822Y 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 |
| BQ4822YMA-70 |
Pb-Free (RoHS) |
Call TI |
N/A for Pkg Type |
BQ4822YMA-70 |
BQ4822YMA-70 |
BQ4822Y 应用技术支持与电子电路设计开发资源下载
- BQ4822Y 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)
BQ4822Y 相关工具
| 名称 |
型号 |
公司 |
工具/软件类型 |
| BQ4822Y 评估模块 |
BQ4822YEVM |
Texas Instruments |
开发电路板/EVM |