X4643 Overview
The X4643/5 bines four popular functions, Poweron Reset Control, Watchdog Timer, Supply Voltage Supervision, and Serial EEPROM Memory in one package. This bination 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.
X4643 Key Features
- Selectable watchdog timer
- Low VCC detection and reset assertion -Four standard reset threshold voltages -Adjust low VCC reset threshold voltage us
- Low power CMOS -<20µA max standby current, watchdog on -<1µA standby current, watchdog off -3mA active current
- 64Kbits of EEPROM -64-byte page write mode -Self-timed write cycle -5ms write cycle time (typical)
- Built-in inadvertent write protection -Power-up/power-down protection circuitry
- 400kHz 2-wire interface
- 2.7V to 5.5V power supply operation
- Available packages -8-lead SOIC -8-lead TSSOP
