DataSheet.es    


PDF CAT24C081 Data sheet ( Hoja de datos )

Número de pieza CAT24C081
Descripción Supervisory Circuits with I2C Serial CMOS E2PROM/ Precision Reset Controller and Watchdog Timer
Fabricantes Catalyst Semiconductor 
Logotipo Catalyst Semiconductor Logotipo



Hay una vista previa y un enlace de descarga de CAT24C081 (archivo pdf) en la parte inferior de esta página.


Total 12 Páginas

No Preview Available ! CAT24C081 Hoja de datos, Descripción, Manual

Advanced
CAT24C161/162(16K), CAT24C081/082(8K)
CAT24C041/042(4K), CAT24C021/022(2K)
Supervisory Circuits with I2C Serial CMOS E2PROM, Precision Reset Controller and Watchdog Timer
FEATURES
s Watchdog Timer on SDA for 24CXX1
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
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
DESCRIPTION
The CAT24CXXX is a single chip solution to three
popular functions of EEPROM memory, precision reset
controller and watchdog timer. The 24C161/162(16K),
24C081/082(8K), 24C041/042(4K) and 24C021/022(2K)
feature a I2C Serial CMOS EEPROM. Catalyst's ad-
vanced CMOS technology substantially reduces device
power requirements. The 24CXXX features a 16-byte
page and is available in 8-pin DIP or8-pinSOICpackages.
The reset function of the 24CXXX 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. 24CXXX features
active low reset on pin 2 and active high reset on pin 7.
24CXX1 features watchdog timer on the SDA line.
24CXX2 does not feature the watchdog timer function.
PIN CONFIGURATION
24CXX1/XX2*
DC
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
SDA
RESET/RESET
SCL
Vcc
DC
VSS
WP
Function
Serial Data/Address
Reset I/O
Clock Input
Power Supply
Do Not Connect
Ground
Write Protect
SDA
WP
START/STOP
LOGIC
CONTROL
LOGIC
XDEC
E2PROM
Only for
24C161
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
RESET/RESET
24C1601 BLOCK
Doc. No. 25079-00 1/98 M-1
1

1 page




CAT24C081 pdf
Advanced
CAT24CXX1/XX2
PIN DESCRIPTIONS
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. In the 24CXX1, the
SDA line is also used as the Watchdog Timer Monitor.
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 driving 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
CAT24CXX1 will respond with a reset signal after a time-
out interval of 1.6 seconds for lack of activity. 24CXX1
is designed with the Watchdog Timer feature on the SDA
input. For the 24CXX1, if the microcontroller does not
toggle the SDA input pin within 1.6 seconds the Watch-
dog Timer times out. This will generate a reset condition
on reset outputs. The Watchdog Timer is cleared by any
transition on SDA.
As long as the reset signal is asserted, the Watchdog
Timer will not count and will stay cleared. 24CXX2 does
not feature the Watchdog Timer function.
Figure 1. RESET Output Timing
t
GLITCH
VTH
VRVALID
VCC
tPURST
t RPD
tPURST
RESET
t RPD
RESET
Doc. No. 25079-00 1/98 M-1
5

5 Page





CAT24C081 arduino
Advanced
Ordering Information
Prefix Device #
CAT 2 4 C 1 6 2
Suffix
J
I
CAT24CXX1/XX2
-30 TE13
Optional
Product
Temperature Range
Tape & Reel
Company ID Number
Blank = Commercial (0˚ to 70˚C)
TE13: 2000/Reel
24C161: 16K
I = Industrial (-40˚ to 85˚C)
24C162: 16K
A = Automotive (-40˚to +105˚C)*
24C081: 8K
24C082: 8K
24C041: 4K
24C042: 4K
24C021: 2K
24C022: 2K
Package
P: PDIP
J: SOIC (JEDEC)
Reset Threshold
Voltage
45: 4.5-4.75V
42: 4.25-4.5V
30: 3.0-3.15V
28: 2.85-3.0V
* -40˚ to +125˚C is available upon request
25: 2.55-2.7V
Note:
(1) The device used in the above example is a CAT24C162JI-30TE13 (16K I2C Memory, SOIC, Industrial Temperature, 3.0-3.15V Reset
Threshold Voltage, Tape and Reel)
Doc. No. 25079-00 1/98 M-1
11

11 Page







PáginasTotal 12 Páginas
PDF Descargar[ Datasheet CAT24C081.PDF ]




Hoja de datos destacado

Número de piezaDescripciónFabricantes
CAT24C08(CAT24C01 - CAT24C16) Serial EPROMCatalyst Semiconductor
Catalyst Semiconductor
CAT24C08CMOS Serial EEPROMON Semiconductor
ON Semiconductor
CAT24C081Supervisory Circuits with I2C Serial CMOS E2PROM/ Precision Reset Controller and Watchdog TimerCatalyst Semiconductor
Catalyst Semiconductor
CAT24C082Supervisory Circuits with I2C Serial CMOS E2PROM/ Precision Reset Controller and Watchdog TimerCatalyst Semiconductor
Catalyst Semiconductor

Número de piezaDescripciónFabricantes
SLA6805M

High Voltage 3 phase Motor Driver IC.

Sanken
Sanken
SDC1742

12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters.

Analog Devices
Analog Devices


DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares,
permitiéndote verlos en linea o descargarlos en PDF.


DataSheet.es    |   2020   |  Privacy Policy  |  Contacto  |  Buscar