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  ON Semiconductor Electronic Components Datasheet  

N84C163 Datasheet

Supervisory Circuits

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N84C163
Product Preview
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
18
27
N84C163
36
VCC
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 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.
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
VCC
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.
VCC 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
September, 2016 − Rev. P0
1
Publication Order Number:
N84C163/D


  ON Semiconductor Electronic Components Datasheet  

N84C163 Datasheet

Supervisory Circuits

No Preview Available !

N84C163
Table 1. RESET THRESHOLD OPTION
Part Dash
Number
Minimum
Threshold
Maximum
Threshold
−45 4.50 4.75
−42 4.25 4.50
−30 3.00 3.15
−28 2.85 3.00
−25 2.55 2.70
EXTERNAL LOAD
V CC
GND
BLOCK DIAGRAM
D OUT
ACK
WORD ADDRESS
BUFFERS
SENSEAMPS
SHIFT REGISTERS
COLUMN
DECODERS
SDA
WP
STA RT/ STOP
LOGIC
CONTROL
LOGIC
XDEC
16K
EEPROM
RESET Controller
WAT CH DO G Precision
Vcc Monitor
DATA IN STORAGE
HIGH VOLTAGE/
TIMING CONTROL
STATE COUNTERS
SLAVE
ADDRESS
COMPARATORS
SCL
WDI RESET RESET
www.onsemi.com
2


Part Number N84C163
Description Supervisory Circuits
Maker ON Semiconductor
Total Page 11 Pages
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