Datasheet > N84C161

N84C161

更新时间： 2024-01-28 19:28:38

品牌	Logo	应用领域
安森美 - ONSEMI		/
页数	文件大小	规格书
13页	212K
描述
Supervisory Circuits

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数据手册

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N84C161 数据手册

N84C161, N84C162

Supervisory Circuits with

EEPROM Serial 16-Kb I²C

Precision Reset Controller

and Watchdog Timer (16K)

www.onsemi.com

Description

The N84C161/2 is a complete memory and supervisory solution for

microcontroller−based systems. 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

SOIC−8

CASE 751BD

I C 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

N84C161 watchdog monitors the SDA line, making an additional PC

board trace unnecessary. The lower cost N84C162 does not have a

watchdog timer.

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 V, 3.3 V and 3 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 pushbutton manual reset capability.

PIN CONFIGURATION

RESET

N84C161

N84C162

SCL

SDA

GND

PIN FUNCTIONS

Pin Name

Function

RESET

Do Not Connect

Active Low Reset I/O

Write Protect

The N84C161/2 memory features a 16−byte page. In addition,

hardware data protection is provided by a write protect pin WP and by

GND

SDA

Ground

a V sense circuit that prevents writes to memory whenever V falls

Serial Data/Address

Clock Input

below the reset threshold or until V reaches the reset threshold

SCL

during power up.

These devices are available in a green SOIC−8 package.

RESET

Active High Reset I/O

Power Supply

Features

• Watchdog Monitors SDA Signal (N84C161)

ORDERING INFORMATION

• 400 kHz I C Bus Compatible

For Ordering Information details, see page 11.

• 2.7 V to 6 V Operation

• Low Power CMOS Technology

• 16−Byte Page Write Buffer

• 1,000,000 Program/Erase Cycles

• Built−in Inadvertent Write Protection

• Manual Reset

♦ V Lock Out

♦ Write Protection Pin, WP

• 100 Year Data Retention

• Active High or Low Reset

• 8−Pin SOIC

♦ Precision Power Supply Voltage Monitor

♦ 5 V, 3.3 V and 3 V Systems

• Commercial and Industrial Temperature Ranges

• These Devices are Pb−Free, Halogen Free/BFR Free

♦ Five Threshold Voltage Options

and are RoHS Compliant

Publication Order Number:

May, 2018 − Rev. 1

N84C161/D

12 3 4 5 6 7...13

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