Catalog
EEPROM Serial 16-Kb CPU Supervisor
Key Features
• Watchdog monitors SDA signal
• 400 kHz I²C bus compatible
• 2.7 V to 6.0 V operation
• Low power CMOS technology
• 16-Byte page write buffer
• Built-in inadvertent write protection— VCClock out— Write protect pin, WP
• Active high or low reset— Precision power supply voltage monitor— 5V, 3.3V and 3V systems— Five threshold voltage options
• 1,000,000 Program/Erase cycles
• Manual Reset
• 100 Year data retention
• 8-pin SOIC
• Commercial and industrial temperature ranges
Description
AI
The N84C162 is a complete memory and supervisory solution for microcontroller-based systems. A EEPROM Serial 16-Kb CPU Supervisor with hardware memory write protection, a system power supervisor with brown out protection and a watchdog timer are integrated together in low power CMOS technology. Memory interface is via an I²C bus.The power supply monitor and reset circuit protects memory and system controllers during power up/down and against brownout conditions. Five reset threshold voltages support 5.0 V, 3.3 V and 3.0 V systems. If power supply voltages are out of tolerance reset signals become active, preventing the system microcontroller, ASIC or peripherals from operating. Reset signals become inactive typically 200 ms after the supply voltage exceeds the reset threshold level. With both active high and low reset signals, interface to microcontrollers and other ICs is simple. In addition, a reset pin can be used as a debounced input for push-button manual reset capability.The N84C162 memory features a 16-byte page. In addition, hardware data protection is provided by a write protect pin WP and by a VCCsense circuit that prevents writes to memory whenever VCCfalls below the reset threshold or until VCCreaches the reset threshold during power up.
