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PDF CAT24C163 Data sheet ( Hoja de datos )

Número de pieza CAT24C163
Descripción Supervisory Circuits with I2C Serial CMOS E2PROM/ Precision Reset Controller and Watchdog Timer
Fabricantes Catalyst Semiconductor 
Logotipo Catalyst Semiconductor Logotipo



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Advanced
CAT24C163(16K), CAT24C083(8K)
CAT24C043(4K), CAT24C023(2K)
Supervisory Circuits with I2C Serial CMOS E2PROM, Precision Reset Controller and Watchdog Timer
FEATURES
s Watchdog Timer Input (WDI)
s Programmable Reset Threshold
s 400 KHz I2C Bus Compatible
s 2.7 to 6 Volt Operation
s Low Power CMOS Technology
s 16 - Byte Page Write Buffer
s Built-in inadvertent write protection
— VCC Lock Out
DESCRIPTION
s Active High or Low Reset Outputs
— Precision Power Supply Voltage Monitoring
— 5V, 3.3V and 3V options
s 1,000,000 Program/Erase Cycles
s 100 Year Data Retention
s 8-Pin DIP or 8-Pin SOIC
s Commercial, Industrial and Automotive
Temperature Ranges
The CAT24CXX3 is a single chip solution to three
popular functions of EEPROM memory, precision reset
controller and watchdog timer. The 24C163(16K),
24C083(8K), 24C043(4K) and 24C023(2K) feature a I2C
Serial CMOS EEPROM Catalyst advanced CMOS tech-
nology substantially reduces device power requirements.
The 24CXX3 features a 16-byte page and is available in
8-pin DIP or 8-pin SOIC packages.
The reset function of the 24CXX3 protects the system
during brown out and power up/down conditions. During
system failure the watchdog timer feature protects the
microcontroller with a reset signal. 24CXX3 features
active low reset on pin 2 and active high reset on pin 7.
24CXX3 features watchdog timer on the WDI input pin
(pin 1).
PIN CONFIGURATION
24CXX3
WDI
RESET
WP
VSS
VCC
RESET
SCL
SDA
BLOCK DIAGRAM
EXTERNAL LOAD
VCC
VSS
DOUT
ACK
WORD ADDRESS
BUFFERS
SENSE AMPS
SHIFT REGISTERS
COLUMN
DECODERS
*All products offered in P and J packages
PIN FUNCTIONS
Pin Name
Function
SDA
Serial Data/Address
RESET/RESET Reset I/O
SCL Clock Input
Vcc Power Supply
VSS Ground
WDI Watchdog Timer Input
WP Write Protect
SDA
WP
START/STOP
LOGIC
CONTROL
LOGIC
XDEC
E2PROM
RESET Controller
High
Precision
WATCHDOG
Vcc Monitor
DATA IN STORAGE
HIGH VOLTAGE/
TIMING CONTROL
STATE COUNTERS
SLAVE
ADDRESS
COMPARATORS
SCL
© 1998 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
WDI RESET/RESET
1
24C1601 BLOCK
Doc. No. 25080-00 3/98 M-1

1 page




CAT24C163 pdf
Advanced
CAT24C163/083/043/023
PIN DESCRIPTIONS
WDI: WATCHDOG INPUT
If there is no transition on the WDI for more than 1.6
seconds, the watchdog timer times out.
WP: WRITE PROTECT
If the pin is tied to VCC the entire memory array becomes
Write Protected (READ only). When the pin is tied to VSS
or left floating normal read/write operations are allowed
to the device.
SCL: SERIAL CLOCK
The serial clock input clocks all data transferred into or
out of the device.
RESET/RESET: RESET I/O
These are open drain pins and can be used as reset
trigger inputs. By forcing a reset condition on the pins the
device will initiate and maintain a reset condition for
approximately 200ms. RESET pin must be connected
through a pull-down and RESET pin must be connected
through a pull-up device.
SDA: SERIAL DATA/ADDRESS
The bidirectional serial data/address pin is used to
transfer all data into and out of the device. The SDA pin
is an open drain output and can be wire-ORed with other
open drain or open collector outputs.
DEVICE OPERATION
Reset Controller Description
The CAT24CXXX provides a precision RESET control-
ler that ensures correct system operation during brown-
out and power up/down conditions. It is configured
with open drain RESET outputs. During power-up, the
RESET outputs remain active until VCC reaches the
VTH threshold and will continue driving the outputs for
approximately 200ms (tPURST) after reaching VTH. After
the tPURST timeout interval, the device will cease to drive
reset outputs. At this point the reset outputs will be pulled
up or down by their respective pull up/pull down devices.
During power-down, the RESET outputs will begin driv-
ing active when VCC falls below VTH. The RESET
outputs will be valid so long as VCC is >1.0V (VRVALID).
The RESET pins are I/Os; therefore, the CAT24CXXX
can act as a signal conditioning circuit for an externally
applied reset. The inputs are level triggered; that is, the
RESET input in the 24CXXX will initiate a reset timeout
after detecting a high and the RESET input in the
24CXXX will initiate a reset timeout after detecting a low.
Watchdog Timer
The Watchdog Timer provides an independent protec-
tion for microcontrollers. During a system failure, the
CAT24CXXX will respond with a reset signal after a
time-out interval of 1.6 seconds for a lack of activity. The
24CXX3 is designed with a WDI input pin for the Watch-
dog Timer function. For the 24CXX3, if the microcontroller
does not toggle the WDI input pin within 1.6 seconds, the
Watchdog Timer times out. This will generate a reset
condition on reset outputs. The Watchdog Timer is
cleared by any transition on WDI.
As long as the reset signal is asserted, the Watchdog
Timer will not count and will stay cleared.
Figure 1. RESET Output Timing
t
GLITCH
VTH
VRVALID
VCC
tPURST
t RPD
tPURST
RESET
t RPD
RESET
5 Doc. No. 25080-00 3/98 M-1

5 Page





CAT24C163 arduino
Advanced
Ordering Information
Prefix Device #
CAT 2 4 C 1 6 3
Suffix
J
I
CAT24C163/083/043/023
-30 TE13
Optional
Company ID
Product
Number
24C163: 16K
24C083: 8K
24C043: 4K
24C023: 2K
Temperature Range
Blank = Commercial (0˚ to 70˚C)
I = Industrial (-40˚ to 85˚C)
A = Automotive (-40˚to +105˚C)
Tape & Reel
TE13: 2000/Reel
Package
P: PDIP
J: SOIC (JEDEC)
* -40˚ to +125˚C is available upon request
Reset Threshold
Voltage
45: 4.5-4.75V
42: 4.25-4.5V
30: 3.0-3.15V
28: 2.85-3.0V
25: 2.55-2.7V
Note:
(1) The device used in the above example is a CAT24C163JI-30TE13 (16K I2C Memory, SOIC, Industrial Temperature, 3.0-3.15V Reset
Threshold Voltage, Tape and Reel)
11 Doc. No. 25080-00 3/98 M-1

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