32Kbit SPI EEPROM的中央处理器监控器
DESCRIPTION
These devices combine four popular functions, Power-on Reset Control, Watchdog Timer, Supply Voltage Supervision, and Block Lock Protect Serial EEPROM Memory in one package. This combination lowers system cost, reduces board space requirements, and increases reliability.
FEATURES
• Selectable watchdog timer
• Low VCC detection and reset assertion
—Five standard reset threshold voltages
—Re-program low VCC reset threshold voltage using special programming sequence
—Reset signal valid to VCC = 1V
• Determine watchdog or low voltage reset with a volatile flag bit
• Long battery life with low power consumption
—<50µA max standby current, watchdog on
—<1µA max standby current, watchdog off
—<400µA max active current during read
• 32Kbits of EEPROM
• Built-in inadvertent write protection
—Power-up/power-down protection circuitry
—Protect 0, 1/4, 1/2 or all of EEPROM array with Block Lock™ protection
—In circuit programmable ROM mode
• 2MHz SPI interface modes 0,0 & 1,1
• Minimize EEPROM programming time
—32-byte page write mode
—Self-timed write cycle
—5ms write cycle time typical
• 2.7V to 5.5V and 4.5V to 5.5V power supply operation
• Available packages
—14 Ld TSSOP, 8 Ld SOIC, 8 Ld PDIP
• Pb-free plus anneal available RoHS compliant
