N84C163 Datasheet, PDF (1/11 Pages) ON Semiconductor – Supervisory Circuits with I2C Serial CMOS EEPROM Precision Reset Controller

N84C163
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Supervisory Circuits with
I²C Serial CMOS EEPROM,
Precision Reset Controller
and Watchdog Timer (16K)
www.onsemi.com
Description
The N84C163 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
I²C bus.
SOIC−8
CASE 751BD
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
N84C163 watchdog monitors the WDI input pin.
The power supply monitor and reset circuit protects memory and
PIN CONFIGURATION
SOIC 8 Lead
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
WDI
RESET
WP
1
8
2
7
N84C163
3
6
V_CC
RESET
SCL
peripherals from operating. Reset signals become inactive typically
200 ms after the supply voltage exceeds the reset threshold level. With
GND 4
5 SDA
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.
The N84C163 memory features a 16−byte page. In addition,
PIN FUNCTIONS
Pin Name Function
hardware data protection is provided by a write protect pin WP and by
WDI
Watchdog Timer Input
a V_CC sense circuit that prevents writes to memory whenever V_CC falls
below the reset threshold or until V_CC reaches the reset threshold
during power up.
This device is available in a green SOIC−8 package.
RESET
WP
GND
SDA
Active Low Reset I/O
Write Protect
Ground
Serial Data/Address
Features
• Watchdog Timer Input (WDI)
• 400 kHz I²C Bus Compatible
• 2.7 V to 6.0 V Operation
SCL
RESET
V_CC
Clock Input
Active High Reset I/O
Power Supply
• Low Power CMOS Technology
• 16−Byte Page Write Buffer
ORDERING INFORMATION
• Built−in Inadvertent Write Protection
For Ordering Information details, see page 10.
♦ V_CC Lock Out
♦ Write Protection Pin, WP
• Active High or Low Reset
♦ Precision Power Supply Voltage Monitor
• 100 Year Data Retention
• 8−Pin SOIC Package
♦ 5 V, 3.3 V and 3 V Systems
♦ Five Threshold Voltage Options
• 1,000,000 Program/Erase Cycles
• Manual Reset
• Commercial and Industrial Temperature Ranges
• These Devices are Pb−Free, Halogen Free/BFR Free
and are RoHS Compliant
This document contains information on a product under development. ON Semiconductor
reserves the right to change or discontinue this product without notice.
© Semiconductor Components Industries, LLC, 2016
1
September, 2016 − Rev. P0
Publication Order Number:
N84C163/D