方案
设计
EEPROM Memory | CAT1021
概览
CAT1021 是一个全面的内存和监督管理方案，适用于基于微控制器的系统。EEPROM 串行 2-Kb I2C CPU 监督器与具有欠电压保护功能的系统电源监督器利用低功耗 CMOS 技术集成在一起。内存接口经由一个 400 kHz I²C 总线。CAT1021 提供一个精确 VCC 感应电路和两个开漏输出：当 VCC 低于重置阈值电压时，一个（重置）输出驱动高电平，另一个（重置）输出驱动低电平。CAT1021 还具有写保护输入 (WP)。如果 WP 连接至逻辑高电平，则禁用写操作。监督器有一个 1.6 秒的监督计时器电路，如果软件或硬件故障导致系统停机或暂停，它会将系统重置为已知状态。监督计时器监控 SDA 信号。电源开启/关闭过程中和欠电压情况下，电源监控器和重置电路会保护内存与系统控制器。五个重置阈值电压支持 5.0 V、3.3 V 和 3.0 V 系统。如果电源电压超出容限范围，重置信号会激活，防止系统微控制器、ASIC 或外围设备运行。重置信号通常在电源电压超过重置阈值水平 200 毫秒后失效。当高电平和低电平重置信号都激活时，与微控制器和其他集成电路的接口连接就变简单了。此外，重置引脚或独立输入 MR 可用作具有按钮手动重置功能的输入。片上 2 Kb EEPROM 内存具有一个 16 字节页。此外，VCC 感应电路提供硬件数据保护功能，以防在 VCC 低于重置阈值或 VCC 在通电期间达到重置阈值时写入内存。所采用的封装包括 8 引脚 DIP、8 引脚 SOIC、8 引脚 TSSOP、8 引脚 TDFN 和 8 引脚 MSOP。TDFN 封装
应用
- Industrial control
- Medical systems
- Printers
- Mass storage
特性
- Precision power supply voltage monitor
- 5.0 V, 3.3 V and 3.0 V systems
- Five threshold voltage options - Watchdog timer
- Active high or low reset
- Valid reset guaranteed at VCC = 1 V - 400 kHz I²C bus
- 3.0 V to 5.5 V operation
- Low power CMOS technology
- 16-Byte page write buffer
- Built-in inadvertent write protection
— WP pin - 1,000,000 Program/Erase cycles
- Manual reset input
- 100 year data retention
- 8-pin DIP, SOIC, TSSOP, MSOP or TDFN
(3 x 3 mm foot-print) packages
— TDFN max height is 0.8mm - Industrial and extended temperature ranges
搜寻
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产品
CAT1021WI-30-GT3
Active
Pb
A
H
P
SOIC-8
1
260
REEL
3000
Y
Serial
2 kb
256 x 8
I2C
400
900
2.7
5.5
60
3
-40
85
$0.8653
More Details
CAT1021WI-45-GT3
Last Shipments
Pb
A
H
P
SOIC-8
1
260
REEL
3000
N
Serial
2 kb
256 x 8
I2C
400
900
2.7
5.5
60
3
-40
85
Price N/A
More Details
CAT1021WI-28-GT3
Last Shipments
Pb
A
H
P
SOIC-8
1
260
REEL
3000
N
Serial
2 kb
256 x 8
I2C
400
900
2.7
5.5
60
3
-40
85
Price N/A
More Details
CAT1021YI-28-GT3
Last Shipments
Pb
A
H
P
TSSOP-8
1
260
REEL
3000
N
Serial
2 kb
256 x 8
I2C
400
900
2.7
5.5
60
3
-40
85
Price N/A
More Details
CAT1021YI-45-GT3
Last Shipments
Pb
A
H
P
TSSOP-8
1
260
REEL
3000
N
Serial
2 kb
256 x 8
I2C
400
900
2.7
5.5
60
3
-40
85
Price N/A
More Details
CAT1021YI-30-GT3
Last Shipments
Pb
A
H
P
TSSOP-8
1
260
REEL
3000
N
Serial
2 kb
256 x 8
I2C
400
900
2.7
5.5
60
3
-40
85
Price N/A
More Details
CAT1021YI-42-GT3
Last Shipments
Pb
A
H
P
TSSOP-8
1
260
REEL
3000
N
Serial
2 kb
256 x 8
I2C
400
900
2.7
5.5
60
3
-40
85
Price N/A
More Details
CAT1021YI-25-GT3
Last Shipments
Pb
A
H
P
TSSOP-8
1
260
REEL
3000
N
Serial
2 kb
256 x 8
I2C
400
900
2.7
5.5
60
3
-40
85
Price N/A
More Details
CAT1021ZI-42-GT3
Last Shipments
Pb
A
H
P
MSOP-8
1
260
REEL
3000
N
Serial
2 kb
256 x 8
I2C
400
900
2.7
5.5
60
3
-40
85
Price N/A
More Details
CAT1021WI-42-GT3
Last Shipments
Pb
A
H
P
SOIC-8
1
260
REEL
3000
N
Serial
2 kb
256 x 8
I2C
400
900
2.7
5.5
60
3
-40
85
Price N/A
More Details
CAT1021WI-25-GT3
Last Shipments
Pb
A
H
P
SOIC-8
1
260
REEL
3000
N
Serial
2 kb
256 x 8
I2C
400
900
2.7
5.5
60
3
-40
85
Price N/A
More Details
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