onsemi CAT1163WI-30-G

A serial EEPROM memory (16K) 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 1.6 - second watchdog circuit returns a system to a known good state if a software or hardware glitch halts or “hangs” the system. The watchdog monitors the WDI input pin. 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 5V, 3.3V and 3V 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 200ms 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 debounced input for pushbutton manual reset capability. The memory features a 16 - byte page. In addition, hardware data protection is provided by a write protect pin WP and by a VCC sense circuit that prevents writes to memory whenever VCC falls below the reset threshold or until VCC reaches the reset threshold during power up. Available packages include an 8 - pin DIP and a surface mount, 8 - pin SO package.

• Watchdog timer input (WDI)
• 400kHz I2C bus compatible
• 2.7V to 6.0V operation
• Low power CMOS technology
• 16 - Byte page write buffer
• Built - in inadvertent write protection VCC lock 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 DIP or 8 - pin SOIC
• Commercial and industrial temperature ranges