BQ4845Y 具有 NVSRAM 控制、看门狗定时器、上电复位、中断与电池低电警告的 RTC IC

BQ4845Y 描述

The bq4845 Real-Time Clock is a low-power microprocessor peripheral that integrates a time-of-day clock, a 100-year calendar, and a CPU supervisor in a 28-pin SOIC or DIP. The bq4845 is ideal for fax machines, copiers, industrial control systems, point-of-sale terminals, data loggers, and computers. The bq4845 provides direct connections for a 32.768KHz quartz crystal and a 3V backup battery. Through the use of the conditional chip enable output (CE\OUT) and battery voltage output (VOUT) pins, the bq4845 can write-protect and make nonvolatile external SRAMs. The backup cell powers the real-time clock and maintains SRAM information in the absence of system voltage. The bq4845 contains a temperature-compensated reference and comparator circuit that monitors the status of its voltage supply.

BQ4845Y
Supply Voltage(V) 5  
Bus Interface Parallel  
Operating Temperature Range(°C) -40 to 85,0 to 70  
Pin/Package 28PDIP, 28SOIC  
Approx. Price (US$) 2.50 | 1ku  
RTC Bytes 16
BQ4845Y 特性
BQ4845Y 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
BQ4845YP-A4 ACTIVE 0 to 70 2.50 | 1ku PDIP (N) | 28 13 | TUBE 4845YP
-A4
BQ4845YS-A4 ACTIVE 0 to 70 3.00 | 1ku SOIC (DW) | 28 20 | TUBE 4845YS
-A4
BQ4845YS-A4G4 ACTIVE 0 to 70 3.00 | 1ku SOIC (DW) | 28 20 | TUBE 4845YS
-A4
BQ4845YS-A4N ACTIVE -40 to 85 3.00 | 1ku SOIC (DW) | 28 20 | TUBE 4845YS
-A4
BQ4845YS-A4NG4 ACTIVE -40 to 85 3.00 | 1ku SOIC (DW) | 28 20 | TUBE 4845YS
-A4
BQ4845YS-A4NTR ACTIVE   2.50 | 1ku SOIC (DW) | 28 1000 | LARGE T&R 4845YS
-A4
BQ4845YS-A4NTRG4 ACTIVE   2.50 | 1ku SOIC (DW) | 28 1000 | LARGE T&R 4845YS
-A4
BQ4845YS-A4TR ACTIVE 0 to 70 2.50 | 1ku SOIC (DW) | 28 1000 | LARGE T&R 4845YS
-A4
BQ4845YS-A4TRG4 ACTIVE 0 to 70   SOIC (DW) | 28   4845YS
-A4
BQ4845Y 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
BQ4845YP-A4 Pb-Free (RoHS)  A42 SN  N/A for Pkg Type BQ4845YP-A4 BQ4845YP-A4
BQ4845YS-A4 Green (RoHS & no Sb/Br)  CU NIPDAU  Level-1-260C-UNLIM BQ4845YS-A4 BQ4845YS-A4
BQ4845YS-A4G4 Green (RoHS & no Sb/Br)  CU NIPDAU  Level-1-260C-UNLIM BQ4845YS-A4G4 BQ4845YS-A4G4
BQ4845YS-A4N Green (RoHS & no Sb/Br)  CU NIPDAU  Level-1-260C-UNLIM BQ4845YS-A4N BQ4845YS-A4N
BQ4845YS-A4NG4 Green (RoHS & no Sb/Br)  CU NIPDAU  Level-1-260C-UNLIM BQ4845YS-A4NG4 BQ4845YS-A4NG4
BQ4845YS-A4NTR Green (RoHS & no Sb/Br)  CU NIPDAU  Level-1-260C-UNLIM BQ4845YS-A4NTR BQ4845YS-A4NTR
BQ4845YS-A4NTRG4 Green (RoHS & no Sb/Br)  CU NIPDAU  Level-1-260C-UNLIM BQ4845YS-A4NTRG4 BQ4845YS-A4NTRG4
BQ4845YS-A4TR Green (RoHS & no Sb/Br)  CU NIPDAU  Level-1-260C-UNLIM BQ4845YS-A4TR BQ4845YS-A4TR
BQ4845Y 应用技术支持与电子电路设计开发资源下载
  1. BQ4845Y 数据资料 dataSheet 下载.PDF
  2. TI 德州仪器实时时钟产品选型与价格 . xls
  3. PowerPAD™ Thermally Enhanced Package   (PDF  1040 KB)
  4. 全面认识开关型电源中的BUCK-BOOST功率级 (Rev. A)   (PDF  2206 KB)
  5. Shelf-Life Evaluation of Lead-Free Component Finishes (PDF 1305 KB)
  6. PowerPAD™ Made Easy (PDF 57 KB)
  7. 标准线性产品交叉参考 (Rev. D)   (PDF  1058 KB)
  8. 模数规格和性能特性术语表 (Rev. A) (PDF 1993 KB)
  9. 所选封装材料的热学和电学性质 (PDF 645 KB)
  10. 高速数据转换 (PDF 1967 KB)
BQ4845Y 相关工具
名称 型号 公司 工具/软件类型
BQ4845Y 评估模块 BQ4845YEVM Texas Instruments 开发电路板/EVM