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CAT24C323J-30TE13 View Datasheet(PDF) - Catalyst Semiconductor => Onsemi

Part NameCAT24C323J-30TE13 Catalyst
Catalyst Semiconductor => Onsemi Catalyst
DescriptionSupervisory circuits with I2C serial CMOS E2EPROM, precision reset controller and watchdog timer
CAT24C323J-30TE13 Datasheet PDF : 12 Pages
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Advanced
CAT24C323/643
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. ACK poll-
ing can be initiated immediately. This involves issuing
the start condition followed by the slave address for a
write operation. If CAT24CXXX is still busy with the write
operation, no ACK will be returned. If
CAT24CXXX has completed the write operation, an
ACK will be returned and the host can then proceed with
the next read or write operation.
WRITE PROTECTION
The Write Protection feature allows the user to protect
against inadvertent programming of the memory array.
If the WP pin is tied to VCC, the entire memory array is
Figure 9. Immediate Address Read Timing
protected and becomes read only. The CAT24CXXX
will accept both slave and byte addresses, but the
memory location accessed is protected from program-
ming by the device's failure to send an acknowledge
after the first byte of data is received.
READ OPERATIONS
The READ operation for the CAT24CXXX is initiated in
the same manner as the write operation with one excep-
tion, that R/W bit is set to one. Three different READ
operations are possible: Immediate/Current Address
READ, Selective/Random READ and Sequential READ.
SCL
SDA
S
T
S
BUS ACTIVITY: A
SLAVE
T
MASTER R ADDRESS
O
T
P
SDA LINE S
P
A
N
C
DATA
O
K
A
C
K
8
9
8TH BIT
DATA OUT
NO ACK
STOP
24C1601Fig.8
Doc. No. 25084-00 12/98
9
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CAT24C323(32K), CAT24C643 (64K)

DESCRIPTION
The CAT24C323/643 is a single chip solution to three popular functions of EEPROM memory, precision reset controller and watchdog timer. The 24C323(32K) and 24C643 (64K) feature a I
2C Serial CMOS EEPROM Catalyst advanced CMOS technology substantially reduces device power requirements. The 24C323/643 features a 32-byte page and is available in 8-pin DIP or 8-pin SOIC packages.The reset function of the 24C323/643 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. 24C323 features active low reset on pin 2 and active high reset on pin 7. 24C323/643 features watchdog timer on the WDI input pin (pin 1).

FEATURES
■Watchdog Timer Input (WDI)
■ Programmable Reset Threshold
■ 400 KHz I2C Bus Compatible
■ 2.7 to 6 Volt Operation
■ Low Power CMOS Technology
■ 32 - Byte Page Write Buffer
■Built-in inadvertent write protection
— VCC Lock Out
■  Active High or Low Reset Outputs
— Precision Power Supply Voltage Monitoring
—  5V, 3.3V and 3V options
■ 1,000,000 Program/Erase Cycles
■ 100 Year Data Retention
■8-Pin DIP or 8-Pin SOIC
■Commercial, Industrial and Automotive Temperature Ranges

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