CAT24C043 CATALYST [Catalyst Semiconductor], CAT24C043 Datasheet

no-image

CAT24C043

Manufacturer Part Number
CAT24C043
Description
Supervisory Circuits with I2C Serial CMOS E2PROM, Precision Reset Controller and Watchdog Timer
Manufacturer
CATALYST [Catalyst Semiconductor]
Datasheet
DESCRIPTION
The CAT24CXX3 is a single chip solution to three
popular functions of EEPROM memory, precision reset
controller and watchdog timer.
24C083(8K), 24C043(4K) and 24C023(2K) feature a I
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.
RESET
PIN FUNCTIONS
Advanced
PIN CONFIGURATION
*All products offered in P and J packages
FEATURES
CAT24C163(16K), CAT24C083(8K)
CAT24C043(4K), CAT24C023(2K)
Supervisory Circuits with I 2 C Serial CMOS E 2 PROM, Precision Reset Controller and Watchdog Timer
© 1998 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
V SS
Pin Name
SDA
RESET/RESET
SCL
Vcc
V
WDI
WP
WDI
WP
Watchdog Timer Input (WDI)
Programmable Reset Threshold
400 KHz I 2 C Bus Compatible
2.7 to 6 Volt Operation
Low Power CMOS Technology
16 - Byte Page Write Buffer
— V
Built-in inadvertent write protection
SS
CC
24CXX3
Lock Out
V CC
RESET
SCL
SDA
Serial Data/Address
Clock Input
Power Supply
Ground
Watchdog Timer Input
Write Protect
Reset I/O
Function
The 24C163(16K),
2
C
BLOCK DIAGRAM
EXTERNAL LOAD
V CC
V SS
SDA
WP
1
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).
100 Year Data Retention
1,000,000 Program/Erase Cycles
8-Pin DIP or 8-Pin SOIC
Commercial, Industrial and Automotive
Active High or Low Reset Outputs
— Precision Power Supply Voltage Monitoring
— 5V, 3.3V and 3V options
Temperature Ranges
START/STOP
WATCHDOG
CONTROL
LOGIC
WORD ADDRESS
LOGIC
RESET Controller
WDI RESET/RESET
BUFFERS
D OUT
ACK
Vcc Monitor
High
Precision
XDEC
SHIFT REGISTERS
DATA IN STORAGE
STATE COUNTERS
SLAVE
ADDRESS
COMPARATORS
TIMING CONTROL
HIGH VOLTAGE/
SENSE AMPS
DECODERS
COLUMN
E
2
PROM
Doc. No. 25080-00 3/98 M-1
24C1601 BLOCK
SCL

Related parts for CAT24C043

CAT24C043 Summary of contents

Page 1

... Advanced CAT24C163(16K), CAT24C083(8K) CAT24C043(4K), CAT24C023(2K) Supervisory Circuits with Serial CMOS E 2 PROM, Precision Reset Controller and Watchdog Timer FEATURES Watchdog Timer Input (WDI) Programmable Reset Threshold 400 KHz Bus Compatible 2 Volt Operation Low Power CMOS Technology 16 - Byte Page Write Buffer Built-in inadvertent write protection — ...

Page 2

ABSOLUTE MAXIMUM RATINGS* Temperature Under Bias....................– +125 C Storage Temperature........................ – +150 C Voltage on Any Pin with (1) Respect to Ground ..............–2. with Respect to Ground..................–2.0V to +7.0V CC Package Power Dissipation ...

Page 3

Advanced A.C. CHARACTERISTICS V =2.7V to 6.0V unless otherwise specified. CC Output Load is 1 TTL Gate and 100pF Read & Write Cycle Limits Symbol Parameter F Clock Frequency SCL (1) T Noise Suppression Time I Constant at SCL, SDA ...

Page 4

RESET CIRCUIT CHARACTERISTICS Symbol Parameter t Glitch Reject Pulse Width GLITCH V Reset Threshold Hystersis RT V Reset Output Low Voltage (I OLRS V Reset Output High Voltage OHRS Reset Threshold (Vcc=5V) (24CXXX-45) Reset Threshold (Vcc=5V) (24CXXX-42) Reset Threshold (Vcc=3.3V) ...

Page 5

Advanced 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 V the entire memory array becomes CC ...

Page 6

CAT24C163/083/043/023 Hardware Data Protection The 24CXXX is designed with the following hardware data protection features to provide a high degree of data integrity. (1) The 24CXXX features a WP pin. When WP pin is tied high the entire memory array ...

Page 7

Advanced FUNCTIONAL DESCRIPTION 2 The CAT24CXXX supports the I sion protocol. This Inter-Integrated Circuit Bus protocol defines any device that sends data to the bus transmitter and any device receiving data re- ceiver. The ...

Page 8

CAT24C163/083/043/023 ACKNOWLEDGE After a successful data transfer, each receiving device is required to generate an acknowledge. The Acknowledg- ing device pulls down the SDA line during the ninth clock cycle, signaling that it received the 8 bits of data. The ...

Page 9

Advanced Acknowledge Polling Disabling of the inputs can be used to take advantage of the typical write cycle time. Once the stop condition is issued to indicate the end of the host’s write operation, CAT24CXXX initiates the internal write cycle. ...

Page 10

CAT24C163/083/043/023 Immediate/Current Address Read The CAT24CXXX’s address counter contains the ad- dress of the last byte accessed, incremented by one. In other words, if the last READ or WRITE access was to address N, the READ immediately following would ac- ...

Page 11

Advanced Ordering Information Prefix Device # CAT Optional Product Company ID Number 24C163: 16K 24C083: 8K 24C043: 4K 24C023 -40˚ to +125˚C is available upon request Note: (1) The device used in ...

Page 12

Doc. No. 25080-00 3/98 M-1 12 Advanced ...

Related keywords