BQ2204A 用于 4 SRAM 内存组的 SRAM 非易失性控制器 IC
BQ2204A 描述
The CMOS bq2204A SRAM Non-volatile Controller Unit provides all necessary functions for converting up to four banks of standard CMOS SRAM into nonvolatile read/write memory.
A precision comparator monitors the 5V VCC input for an out-of-tolerance condi-tion. When out-of-tolerance is detected, the four conditioned chip-enable outputs are forced inactive to write-protect up to four banks of SRAM.
During a power failure, the external SRAMs are switched from the VCC supply to one of two 3V backup sup-plies. On a subsequent power-up, the SRAMs are write-protected until a power-valid condition exists.
During power-valid operation, a two-input decoder transparently selects one of up to four banks of SRAM.
|
BQ2204A |
| Supply Voltage(V) |
5 |
| Pin/Package |
16PDIP, 16SOIC |
| Approx. Price (US$) |
2.85 | 1ku |
BQ2204A 特性
- Power monitoring and switching for 3-volt battery-backup applications
- Write-protect control
- 2-input decoder for control of up to 4 banks of SRAM
- 3-volt primary cell inputs
- Less than 10ns chip-enable propagation delay
- 5% or 10% supply operation
BQ2204A 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 |
| BQ2204APN |
ACTIVE |
0 to 70 |
2.85 | 1ku |
PDIP (N) | 16 |
25 | TUBE |
2204APN |
| BQ2204ASN |
ACTIVE |
0 to 70 |
3.45 | 1ku |
SOIC (D) | 16 |
40 | TUBE |
2204A |
| BQ2204ASN-N |
ACTIVE |
-40 to 85 |
3.45 | 1ku |
SOIC (D) | 16 |
40 | TUBE |
2204A |
| BQ2204ASN-NG4 |
ACTIVE |
-40 to 85 |
3.45 | 1ku |
SOIC (D) | 16 |
40 | TUBE |
2204A |
| BQ2204ASNG4 |
ACTIVE |
0 to 70 |
3.45 | 1ku |
SOIC (D) | 16 |
40 | TUBE |
2204A |
| BQ2204ASNTR |
ACTIVE |
0 to 70 |
2.85 | 1ku |
SOIC (D) | 16 |
2500 | LARGE T&R |
2204A |
| BQ2204ASNTRG4 |
ACTIVE |
0 to 70 |
2.85 | 1ku |
SOIC (D) | 16 |
2500 | LARGE T&R |
2204A |
BQ2204A 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 |
| BQ2204APN |
Pb-Free (RoHS) |
CU NIPDAU |
N/A for Pkg Type |
BQ2204APN |
BQ2204APN |
| BQ2204ASN |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-2-260C-1 YEAR |
BQ2204ASN |
BQ2204ASN |
| BQ2204ASN-N |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-2-260C-1 YEAR |
BQ2204ASN-N |
BQ2204ASN-N |
| BQ2204ASN-NG4 |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-2-260C-1 YEAR |
BQ2204ASN-NG4 |
BQ2204ASN-NG4 |
| BQ2204ASNG4 |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-2-260C-1 YEAR |
BQ2204ASNG4 |
BQ2204ASNG4 |
| BQ2204ASNTR |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-2-260C-1 YEAR |
BQ2204ASNTR |
BQ2204ASNTR |
| BQ2204ASNTRG4 |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-2-260C-1 YEAR |
BQ2204ASNTRG4 |
BQ2204ASNTRG4 |
BQ2204A 应用技术支持与电子电路设计开发资源下载
- BQ2204A 数据资料 dataSheet 下载.PDF
- TI 德州仪器NVSRAM（非易失性 SRAM）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)
BQ2204A 相关工具
| 名称 |
型号 |
公司 |
工具/软件类型 |
| BQ2204A 评估模块 |
BQ2204AEVM |
Texas Instruments |
开发电路板/EVM |