BQ4285 具有 114x8 NVSRAM 和 NVSRAM 控制的 RTC IC

BQ4285 描述

The CMOS bq4285 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 114 bytes of general nonvolatile storage. The bq4285 write-protects the clock, calendar, and storage registers during power failure. A backup battery then maintains data and operates the clock and calendar. The bq4285 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. The bq4285 integrates a battery-backup controller to make a standard CMOS SRAM nonvolatile during power-fail conditions

BQ4285
Supply Voltage(V) 5  
Bus Interface Multiplexed  
Memory Density(Kb) 0.114  
Operating Temperature Range(°C) 0 to 70  
Pin/Package 24PDIP, 24SOIC  
Approx. Price (US$) 2.90 | 1ku  
RTC Bytes 14
BQ4285 特性
BQ4285 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
BQ4285P-SB2 ACTIVE 0 to 70 2.90 | 1ku PDIP (N) | 24 15 | TUBE 4285P
-SB2
BQ4285S-SB2 ACTIVE 0 to 70 3.50 | 1ku SOIC (DW) | 24 25 | TUBE 4285S
-SB2
BQ4285S-SB2G4 ACTIVE 0 to 70 3.50 | 1ku SOIC (DW) | 24 25 | TUBE 4285S
-SB2
BQ4285S-SB2TR ACTIVE 0 to 70 2.90 | 1ku SOIC (DW) | 24 2000 | LARGE T&R 4285S
-SB2
BQ4285S-SB2TRG4 ACTIVE 0 to 70 2.90 | 1ku SOIC (DW) | 24 2000 | LARGE T&R 4285S
-SB2
BQ4285 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
BQ4285P-SB2 Pb-Free (RoHS)  A42 SN  N/A for Pkg Type BQ4285P-SB2 BQ4285P-SB2
BQ4285S-SB2 Green (RoHS & no Sb/Br)  CU NIPDAU  Level-1-260C-UNLIM BQ4285S-SB2 BQ4285S-SB2
BQ4285S-SB2G4 Green (RoHS & no Sb/Br)  CU NIPDAU  Level-1-260C-UNLIM BQ4285S-SB2G4 BQ4285S-SB2G4
BQ4285S-SB2TR Green (RoHS & no Sb/Br)  CU NIPDAU  Level-1-260C-UNLIM BQ4285S-SB2TR BQ4285S-SB2TR
BQ4285S-SB2TRG4 Green (RoHS & no Sb/Br)  CU NIPDAU  Level-1-260C-UNLIM BQ4285S-SB2TRG4 BQ4285S-SB2TRG4
BQ4285 应用技术支持与电子电路设计开发资源下载
  1. BQ4285 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)
BQ4285 相关工具
名称 型号 公司 工具/软件类型
BQ4285 评估模块 BQ4285EVM Texas Instruments 开发电路板/EVM