X55060

DATASHEET X55060 64K Dual Voltage Monitor with Integrated System Battery Switch and EEPROM FN8133 Rev 0.00 March 28, 2005 FEATURES Dual voltage monitoring Active high and active low reset outputs Four standard reset threshold voltages (4.6/2.9, 4.6/2.6, 2.9/1.6, 2.6/1.6) —User programmable thresholds Lowline Output — Zero delayed POR Reset signal valid to VCC = 1V System battery switch-over circuitry Long battery life with low power consumption —<50µA max standby current, watchdog on —<30µA max standby current, watchdog off Selectable watchdog timer —(0.15s, 0.4s, 0.8s, off) 64Kbits of EEPROM Built-in inadvertent write protection —Power-up/power-down protection circuitry —Protect none(0), or all of EEPROM array with programmable Block Lock™ protection —In circuit programmable ROM mode BLOCK DIAGRAM Minimize EEPROM programming time —64 byte page write mode —Self-timed write cycle —5ms write cycle time (typical) 10MHz SPI interface modes (0,0 & 1,1) 2.7V to 5.5V power supply operation Available packages — 20-lead TSSOP DESCRIPTION This device combines power-on reset control, battery switch circuit, watchdog timer, supply voltage supervision, secondary voltage supervision, block lock protect and serial EEPROM in one package. This combination lowers system cost, reduces board space requirements, and increases reliability. Applying power to the device activates the power-on reset circuit which holds RESET/RESET active for a period of time. This allo...