Overview
The Intersil X5043 and X5045 datasheet presents a combination of four key functions integral to microcontroller systems: Power-on Reset Control, Watchdog Timer, Supply Voltage Supervision, and Block Lock Protect Serial EEPROM Memory. This multi-functional approach aims to reduce system cost, board space, and heighten reliability for various electronic applications.
Power-on Reset Control
The power-on reset control features a circuit that ensures the system does not begin operation until the power supply and oscillator are stable. The RESET/RESET signal is held active initially, preventing the processor from running code prematurely.
Watchdog Timer
To safeguard microcontrollers, the Watchdog Timer function oversees operations. If the microcontroller fails to reset the timer within a set interval, the device triggers RESET/RESET. The user can select this interval from three preset times, and once chosen, the interval remains constant even if the power is cycled.
Supply Voltage Supervision
Voltage supervision is managed via low Vcc (supply voltage) detection which resets the system if Vcc falls under the minimum threshold, ensuring RESET/RESET is active until Vcc returns to an acceptable level. Four preset VTRIP thresholds are offered, with the ability to reprogram for specific requirements or accuracy improvements.
Block Lock Protect Serial EEPROM Memory
The datasheet details a CMOS Serial EEPROM array featuring Intersil’s block lock protection, with an internal organization of 512 x 8, aiding in secure data retention and endurance. The EEPROM operates on a simple four-wire bus via SPI and is designed for long-term data storage, withstanding 100,000 write cycles and ensuring data retention for 100 years.
Features and Advantages
Key advantages include low power consumption during standby with or without the watchdog active, as well as multiple EEPROM protection options. Memory protection ranges from one-quarter to the full array. Additional safeguards include built-in inadvertent write protection through a write enable latch and write protect pin.
Device Specifications
EEPROM programming is made efficient with a 16-byte page write mode and fast 5ms typical write cycle time. The devices come in various packages: 8 Ld MSOP, 8 Ld SOIC, 8 Ld PDIP, and 14 Ld TSSOP, with Pb-Free Plus Anneal options for RoHS compliance.
Applications
These ICs are suitable for a broad range of applications from communications equipment like routers and hubs to industrial systems, computer systems including desktops and servers, and battery-powered devices. Each unit ensures long battery life, reliable data storage, and stable system operation.
Caution
The datasheet concludes with a caution regarding device handling, underscoring their sensitivity to electrostatic discharge and recommending proper IC handling procedures.
Manual:
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