The X5043, X5045 is a 4K, 512 x 8 Bit CPU Supervisor with 4K SPI EEPROM produced by Intersil. It has functions such as Power-on Reset Control, Watchdog Timer, Supply Voltage Supervision, and Block Lock Protect Serial EEPROM Memory.
The Intersil X5043 and X5045 are CPU Supervisor devices that integrate four popular functions into a single package to lower system cost and reduce board space. These functions include Power-on Reset Control, Watchdog Timer, Supply Voltage Supervision, and Block Lock Protect Serial EEPROM Memory.
Applying power activates the power-on reset circuit, holding the RESET signal active until the power supply and oscillator stabilize. The device also features a low Vcc detection circuitry that resets the system if voltage falls below the minimum trip point. Additionally, an independent Watchdog Timer provides protection for microcontrollers by asserting the reset signal if the user fails to restart the timer within a selectable interval.
The device provides a minimum endurance of 100,000 cycles and a minimum data retention of 100 years.
The typical write cycle time is 5ms.
The maximum standby current is less than 50uA when the watchdog is on.