X5043, X5045 4K, 512 x 8 Bit CPU Supervisor with 4K SPI EEPROM

Category: Electronics, Intersil Corporation, Other Semiconductors

Overview

The X5043 and X5045 from Intersil are integrated circuits that combine a CPU supervisor with a 4K SPI EEPROM memory block, providing multifunctional system control and memory storage in one package. These devices are essential for ensuring system stability by supervising the power supply, providing a watchdog timer for microcontroller systems, and protecting stored data with block lock protection.

Key Features

Power-on Reset Control: The built-in power-on reset circuit holds RESET/RESET active during power-up to stabilize the power supply and oscillator.

Watchdog Timer: An independent protection mechanism for microcontrollers that triggers RESET/RESET if the microcontroller fails to restart the timer within a preset interval.

Supply Voltage Supervision: Low Vcc detection circuitry asserts RESET/RESET when Vcc falls below one of four preset standard VTRIP thresholds. The device additionally offers the option to reprogram the threshold voltage for custom or precision requirements.

Block Lock Protect Serial EEPROM Memory: The EEPROM array is organized as 512 x 8 with Intersil’s block lock protection to prevent inadvertent writes, and it supports the SPI protocol for simple interfacing.

Power and Memory

The devices are designed for energy efficiency, with standby currents of <50µA when the watchdog is active and <10µA when it is off. The EEPROM memory offers an endurance of 1 million write cycles and a data retention of 100 years.

Operational and Data Security Specifications

Low power consumption is a significant feature, with ultra-low standby currents. The EEPROM offers reliable data storage with block memory protect options and a minimum of 100,000 write cycle endurance. Built-in write protection mechanisms such as a write enable latch and write protect pin help prevent accidental data corruption. Additionally, the SPI interface allows communication with a host microcontroller at a clock rate of 3.3MHz, and write operations can be executed swiftly using a 16-byte page write mode with a nominal write cycle time of 5ms.

Packaging and Applications

A variety of packaging options accommodate different assembly requirements: 8 lead MSOP, 8 lead SOIC, 8 lead PDIP, and 14 lead TSSOP. All packages are available in Pb-Free Plus Anneal, compliant with RoHS standards. These devices suit various applications, including communications equipment like routers and switches, industrial system controls, intelligent instrumentation, desktop and network computers, and battery-powered devices.