N84C161 Series

EEPROM Serial 16-Kb CPU Supervisor

Catalog

EEPROM Serial 16-Kb CPU Supervisor

Part	Package / Case	Package / Case [y]	Package / Case [x]	Voltage - Threshold	Type	Output	Number of Voltages Monitored	Supplier Device Package	Reset	Mounting Type	Operating Temperature [Max]	Operating Temperature [Min]	Reset Timeout
ON Semiconductor N84C161WD45TG	8-SOIC	3.9 mm	0.154 in	4.5 V	Simple Reset/Power-On Reset	Open Drain or Open Collector	1	8-SOIC	Active High/Active Low	Surface Mount	85 °C	-40 °C	130 ms
ON Semiconductor N84C161WD42TG	8-SOIC	3.9 mm	0.154 in	4.25 V	Simple Reset/Power-On Reset	Open Drain or Open Collector	1	8-SOIC	Active High/Active Low	Surface Mount	85 °C	-40 °C	130 ms
ON Semiconductor N84C161WD30TG	8-SOIC	3.9 mm	0.154 in	3 V	Simple Reset/Power-On Reset	Open Drain or Open Collector	1	8-SOIC	Active High/Active Low	Surface Mount	85 °C	-40 °C	130 ms

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 DIP or 8-pin SOIC

• Commercial and industrial temperature ranges

Description

The N84C1611 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 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 CAT1161 watchdog monitors the SDA line, making an additional PC board trace unnecessary.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 CAT1161 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.Available packages include an 8-pin DIP and a surface mount, 8-pin SO package.