EEPROM 串行 2-Kb I2C CPU 监督器

Last Shipments

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

  • Industrial control
  • Medical systems
  • Printers
  • Mass storage

  • 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

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CAD Models

Compliance

Package Type

Case Outline

MSL Type

MSL Temp (°C)

Container Type

Container Qty.

ON Target

Type

Density

Organization

Data Transmission Standard

fcycle Max (kHz)

tACC Max ns

VCC Min (V)

VCC Max (V)

Vio Ref (V)

Istandby Max (µA)

Iact Max (mA)

T Min (°C)

T Max (°C)

Endurance (Write cycles)

Specific Features

Reference Price

CAT1021WI-25-GT3

Obsolete

CAD Model

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

Obsolete

CAD Model

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-30-GT3

Last Shipments

CAD Model

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-42-GT3

Obsolete

CAD Model

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-45-GT3

Obsolete

CAD Model

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-25-GT3

Obsolete

CAD Model

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-28-GT3

Obsolete

CAD Model

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

Obsolete

CAD Model

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

Obsolete

CAD Model

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

Obsolete

CAD Model

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

Obsolete

CAD Model

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

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