CAT1321: CPU Supervisor with 32 k Serial EEPROM Memory

The CAT1321 is a complete memory and supervisory solution for microcontroller-based systems. A 32 kbit serial EEPROM memory and a system power supervisor with brown-out protection are integrated together in low power CMOS technology. Memory interface is via a 400 kHz I²C bus.The CAT1321 provides a precision VCC sense circuit that drives an open drain output, RESET high whenever VCC falls below the reset threshold voltage.The power supply monitor and reset circuit protect memory and system controllers during power up/down and against brownout conditions. Five reset threshold voltages support 5.0 V, 3.3 V and 3.0 V systems. If power supply voltages are out of tolerance reset signals become active, preventing the system microcontroller, ASIC or peripherals from operating. Reset signals become inactive typically 200 ms after the supply voltage exceeds the reset threshold level. With both active high and low reset options, interface to microcontrollers and other ICs is simple.The CAT1321 memory features a 64-byte page. In addition, hardware data protection is provided by a VCC sense circuit that prevents writes to memory whenever VCC falls below the reset threshold or until VCC reaches the reset threshold during power up. Available packages include an 8-pin DIP, SOIC, TSSOP and 4.9 x 3 mm TDFN.

特性
  • Precision power supply voltage monitor - 5.0 V, 3.3 V and 3.0 V systems - +5.0V (+/- 5%, +/- 10%) - +3.3V (+/- 5%, +/- 10%) - +3.0V (+/- 10%)
  • Active high reset
  • Valid reset guaranteed at VCC=1V
  • 400 kHz I²C bus
  • 3.0 V to 5.5 V operation
  • Low power CMOS technology
  • 64-Byte page write buffer
  • 1,000,000 Program/Erase cycles
  • 100 year data retention
  • 8-pin DIP, SOIC, TSSOP and TDFN packages
  • Industrial temperature range
应用
  • Industrial control
  • Medical systems
  • Printers
  • Mass storage
数据表 (1)
Document TitleDocument ID/SizeRevisionRevision Date
CPU Supervisor with 32 k EEPROMCAT1321/D (137.0kB)D
封装图纸 (1)
Document TitleDocument ID/SizeRevision
PDIP-8, 300 mils646AA (55.8kB)A
产品订购型号
产品状况Compliance封装MSL*容器预算价格 (1千个数量的单价)
CAT1321LI-25-GActivePb-free Halide freePDIP-8646AANATube50$0.884
CAT1321LI-28-GActivePb-free Halide freePDIP-8646AANATube50$0.884
CAT1321LI-30-GActivePb-free Halide freePDIP-8646AANATube50$0.884
CAT1321LI-42-GActivePb-free Halide freePDIP-8646AANATube50$0.884
CAT1321LI-45-GActivePb-free Halide freePDIP-8646AANATube50$0.884
订购产品技术参数
ProductTypeDensityOrganizationData Transmission Standardfcycle Max (kHz)tACC Max nsVCC Min (V)VCC Max (V)Istandby Max (µA)Iact Max (mA)T Min (°C)T Max (°C)
CAT1321LI-25-GSerial32 kb4k x 8I2C400-35.5403-4085
CAT1321LI-28-GSerial32 kb4k x 8I2C400-35.5403-4085
CAT1321LI-30-GSerial32 kb4k x 8I2C400-35.5403-4085
CAT1321LI-42-GSerial32 kb4k x 8I2C400-35.5403-4085
CAT1321LI-45-GSerial32 kb4k x 8I2C400-35.5403-4085
CPU Supervisor with 32 k EEPROM (137.0kB) CAT1321
PDIP-8, 300 mils CAT93C86B